diff --git a/BUILD b/BUILD
index e29ba34178b..c0bcb493f12 100644
--- a/BUILD
+++ b/BUILD
@@ -2090,6 +2090,7 @@ grpc_cc_library(
         "//src/core:if",
         "//src/core:iomgr_fwd",
         "//src/core:latch",
+        "//src/core:latent_see",
         "//src/core:loop",
         "//src/core:map",
         "//src/core:match",
@@ -3009,8 +3010,8 @@ grpc_cc_library(
     external_deps = [
         "absl/base:core_headers",
         "absl/container:inlined_vector",
+        "absl/log",
         "absl/log:check",
-        "absl/log:log",
     ],
     language = "c++",
     visibility = ["@grpc:client_channel"],
@@ -3023,6 +3024,7 @@ grpc_cc_library(
         "orphanable",
         "stats",
         "//src/core:experiments",
+        "//src/core:latent_see",
         "//src/core:stats_data",
     ],
 )
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b638b05e30..8b514a2833a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2647,6 +2647,7 @@ add_library(grpc
   src/core/util/json/json_reader.cc
   src/core/util/json/json_util.cc
   src/core/util/json/json_writer.cc
+  src/core/util/latent_see.cc
   src/core/xds/grpc/certificate_provider_store.cc
   src/core/xds/grpc/file_watcher_certificate_provider_factory.cc
   src/core/xds/grpc/xds_audit_logger_registry.cc
@@ -3363,6 +3364,7 @@ add_library(grpc_unsecure
   src/core/util/json/json_object_loader.cc
   src/core/util/json/json_reader.cc
   src/core/util/json/json_writer.cc
+  src/core/util/latent_see.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
   third_party/upb/upb/mini_descriptor/internal/base92.c
@@ -5441,6 +5443,7 @@ add_library(grpc_authorization_provider
   src/core/tsi/transport_security_grpc.cc
   src/core/util/json/json_reader.cc
   src/core/util/json/json_writer.cc
+  src/core/util/latent_see.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
   third_party/upb/upb/mini_descriptor/internal/base92.c
@@ -6376,7 +6379,9 @@ add_executable(activity_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/activity_test.cc
 )
 if(WIN32 AND MSVC)
@@ -8677,6 +8682,7 @@ target_include_directories(bitset_test
 target_link_libraries(bitset_test
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gtest
+  absl::check
 )
 
 
@@ -8938,6 +8944,7 @@ add_executable(call_filters_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/ref_counted_string.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
@@ -8969,6 +8976,7 @@ add_executable(call_filters_test
   src/core/lib/transport/parsed_metadata.cc
   src/core/lib/transport/status_conversion.cc
   src/core/lib/transport/timeout_encoding.cc
+  src/core/util/latent_see.cc
   test/core/transport/call_filters_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -9193,8 +9201,10 @@ add_executable(call_state_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
   src/core/lib/transport/call_state.cc
+  src/core/util/latent_see.cc
   test/core/transport/call_state_test.cc
 )
 if(WIN32 AND MSVC)
@@ -9517,6 +9527,7 @@ add_executable(call_utils_test
   src/core/telemetry/stats_data.cc
   src/core/tsi/alts/handshaker/transport_security_common_api.cc
   src/core/util/json/json_writer.cc
+  src/core/util/latent_see.cc
   test/core/call/call_utils_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -9954,6 +9965,7 @@ add_executable(cancel_callback_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -9972,6 +9984,7 @@ add_executable(cancel_callback_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/promise/cancel_callback_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -11062,6 +11075,7 @@ add_executable(chunked_vector_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -11080,6 +11094,7 @@ add_executable(chunked_vector_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/gprpp/chunked_vector_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -14372,6 +14387,7 @@ add_executable(exec_ctx_wakeup_scheduler_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -14384,6 +14400,7 @@ add_executable(exec_ctx_wakeup_scheduler_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/promise/exec_ctx_wakeup_scheduler_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -15173,6 +15190,7 @@ add_executable(flow_control_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -15192,6 +15210,7 @@ add_executable(flow_control_test
   src/core/lib/slice/slice_buffer.cc
   src/core/lib/slice/slice_string_helpers.cc
   src/core/lib/transport/bdp_estimator.cc
+  src/core/util/latent_see.cc
   test/core/transport/chttp2/flow_control_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -15260,6 +15279,7 @@ add_executable(for_each_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -15278,6 +15298,7 @@ add_executable(for_each_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/promise/for_each_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -18708,7 +18729,9 @@ add_executable(inter_activity_pipe_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/inter_activity_pipe_test.cc
 )
 if(WIN32 AND MSVC)
@@ -18805,6 +18828,7 @@ add_executable(interceptor_list_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -18823,6 +18847,7 @@ add_executable(interceptor_list_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/promise/interceptor_list_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -19598,7 +19623,9 @@ add_executable(latch_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/latch_test.cc
 )
 if(WIN32 AND MSVC)
@@ -20017,6 +20044,7 @@ add_executable(map_pipe_test
   src/core/lib/experiments/experiments.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/gprpp/status_helper.cc
   src/core/lib/gprpp/time.cc
   src/core/lib/iomgr/closure.cc
@@ -20035,6 +20063,7 @@ add_executable(map_pipe_test
   src/core/lib/slice/percent_encoding.cc
   src/core/lib/slice/slice.cc
   src/core/lib/slice/slice_string_helpers.cc
+  src/core/util/latent_see.cc
   test/core/promise/map_pipe_test.cc
   third_party/upb/upb/mini_descriptor/build_enum.c
   third_party/upb/upb/mini_descriptor/decode.c
@@ -21004,7 +21033,9 @@ add_executable(mpsc_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/mpsc_test.cc
 )
 if(WIN32 AND MSVC)
@@ -21505,7 +21536,9 @@ add_executable(observable_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/observable_test.cc
 )
 if(WIN32 AND MSVC)
@@ -23388,7 +23421,9 @@ add_executable(promise_mutex_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/promise_mutex_test.cc
 )
 if(WIN32 AND MSVC)
@@ -30366,6 +30401,7 @@ target_include_directories(table_test
 target_link_libraries(table_test
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gtest
+  absl::check
   absl::type_traits
   absl::utility
 )
@@ -32897,6 +32933,7 @@ target_link_libraries(unique_type_name_test
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gtest
   absl::flat_hash_map
+  absl::check
   absl::str_format
 )
 
@@ -33016,6 +33053,7 @@ target_include_directories(useful_test
 target_link_libraries(useful_test
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gtest
+  absl::check
 )
 
 
@@ -33153,7 +33191,9 @@ add_executable(wait_for_callback_test
   src/core/lib/debug/trace_flags.cc
   src/core/lib/gprpp/dump_args.cc
   src/core/lib/gprpp/glob.cc
+  src/core/lib/gprpp/per_cpu.cc
   src/core/lib/promise/activity.cc
+  src/core/util/latent_see.cc
   test/core/promise/wait_for_callback_test.cc
 )
 if(WIN32 AND MSVC)
diff --git a/Makefile b/Makefile
index 6630151de34..b726a291931 100644
--- a/Makefile
+++ b/Makefile
@@ -1461,6 +1461,7 @@ LIBGRPC_SRC = \
     src/core/util/json/json_reader.cc \
     src/core/util/json/json_util.cc \
     src/core/util/json/json_writer.cc \
+    src/core/util/latent_see.cc \
     src/core/util/linux/cpu.cc \
     src/core/util/linux/log.cc \
     src/core/util/log.cc \
diff --git a/Package.swift b/Package.swift
index 0c6faa4b0c8..d748a579d5c 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1931,6 +1931,8 @@ let package = Package(
         "src/core/util/json/json_util.h",
         "src/core/util/json/json_writer.cc",
         "src/core/util/json/json_writer.h",
+        "src/core/util/latent_see.cc",
+        "src/core/util/latent_see.h",
         "src/core/util/linux/cpu.cc",
         "src/core/util/linux/log.cc",
         "src/core/util/log.cc",
diff --git a/build_autogenerated.yaml b/build_autogenerated.yaml
index 47ad422c32e..e15de0ea55c 100644
--- a/build_autogenerated.yaml
+++ b/build_autogenerated.yaml
@@ -1217,6 +1217,7 @@ libs:
   - src/core/util/json/json_reader.h
   - src/core/util/json/json_util.h
   - src/core/util/json/json_writer.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - src/core/util/upb_utils.h
   - src/core/xds/grpc/certificate_provider_store.h
@@ -2023,6 +2024,7 @@ libs:
   - src/core/util/json/json_reader.cc
   - src/core/util/json/json_util.cc
   - src/core/util/json/json_writer.cc
+  - src/core/util/latent_see.cc
   - src/core/xds/grpc/certificate_provider_store.cc
   - src/core/xds/grpc/file_watcher_certificate_provider_factory.cc
   - src/core/xds/grpc/xds_audit_logger_registry.cc
@@ -2690,6 +2692,7 @@ libs:
   - src/core/util/json/json_object_loader.h
   - src/core/util/json/json_reader.h
   - src/core/util/json/json_writer.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - src/core/util/upb_utils.h
   - third_party/upb/upb/generated_code_support.h
@@ -3105,6 +3108,7 @@ libs:
   - src/core/util/json/json_object_loader.cc
   - src/core/util/json/json_reader.cc
   - src/core/util/json/json_writer.cc
+  - src/core/util/latent_see.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
   - third_party/upb/upb/mini_descriptor/internal/base92.c
@@ -4750,6 +4754,7 @@ libs:
   - src/core/util/json/json_args.h
   - src/core/util/json/json_reader.h
   - src/core/util/json/json_writer.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -5035,6 +5040,7 @@ libs:
   - src/core/tsi/transport_security_grpc.cc
   - src/core/util/json/json_reader.cc
   - src/core/util/json/json_writer.cc
+  - src/core/util/latent_see.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
   - third_party/upb/upb/mini_descriptor/internal/base92.c
@@ -5433,6 +5439,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -5449,13 +5456,16 @@ targets:
   - src/core/lib/promise/promise.h
   - src/core/lib/promise/seq.h
   - src/core/lib/promise/wait_set.h
+  - src/core/util/latent_see.h
   - test/core/promise/test_wakeup_schedulers.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/activity_test.cc
   deps:
   - gtest
@@ -6454,6 +6464,7 @@ targets:
   - test/core/gprpp/bitset_test.cc
   deps:
   - gtest
+  - absl/log:check
   uses_polling: false
 - name: buffer_list_test
   gtest: true
@@ -6614,6 +6625,7 @@ targets:
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
   - src/core/lib/gprpp/packed_table.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/ref_counted_string.h
@@ -6674,6 +6686,7 @@ targets:
   - src/core/lib/transport/simple_slice_based_metadata.h
   - src/core/lib/transport/status_conversion.h
   - src/core/lib/transport/timeout_encoding.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - test/core/promise/poll_matcher.h
   - third_party/upb/upb/generated_code_support.h
@@ -6707,6 +6720,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/ref_counted_string.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
@@ -6738,6 +6752,7 @@ targets:
   - src/core/lib/transport/parsed_metadata.cc
   - src/core/lib/transport/status_conversion.cc
   - src/core/lib/transport/timeout_encoding.cc
+  - src/core/util/latent_see.cc
   - test/core/transport/call_filters_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -6875,6 +6890,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -6885,14 +6901,17 @@ targets:
   - src/core/lib/promise/poll.h
   - src/core/lib/promise/status_flag.h
   - src/core/lib/transport/call_state.h
+  - src/core/util/latent_see.h
   - test/core/promise/poll_matcher.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
   - src/core/lib/transport/call_state.cc
+  - src/core/util/latent_see.cc
   - test/core/transport/call_state_test.cc
   deps:
   - gtest
@@ -7227,6 +7246,7 @@ targets:
   - src/core/util/json/json.h
   - src/core/util/json/json_args.h
   - src/core/util/json/json_writer.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -7481,6 +7501,7 @@ targets:
   - src/core/telemetry/stats_data.cc
   - src/core/tsi/alts/handshaker/transport_security_common_api.cc
   - src/core/util/json/json_writer.cc
+  - src/core/util/latent_see.cc
   - test/core/call/call_utils_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -7870,6 +7891,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -7905,6 +7927,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -7934,6 +7957,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -7952,6 +7976,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/cancel_callback_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -8690,6 +8715,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -8724,6 +8750,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -8753,6 +8780,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -8771,6 +8799,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/gprpp/chunked_vector_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -10274,6 +10303,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -10296,6 +10326,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -10325,6 +10356,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -10337,6 +10369,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/exec_ctx_wakeup_scheduler_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -10834,6 +10867,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -10870,6 +10904,7 @@ targets:
   - src/core/lib/slice/slice_string_helpers.h
   - src/core/lib/transport/bdp_estimator.h
   - src/core/lib/transport/http2_errors.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - third_party/upb/upb/generated_code_support.h
   - third_party/upb/upb/mini_descriptor/build_enum.h
@@ -10902,6 +10937,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -10921,6 +10957,7 @@ targets:
   - src/core/lib/slice/slice_buffer.cc
   - src/core/lib/slice/slice_string_helpers.cc
   - src/core/lib/transport/bdp_estimator.cc
+  - src/core/util/latent_see.cc
   - test/core/transport/chttp2/flow_control_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -10967,6 +11004,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -11010,6 +11048,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - test/core/promise/test_wakeup_schedulers.h
   - third_party/upb/upb/generated_code_support.h
@@ -11040,6 +11079,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -11058,6 +11098,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/for_each_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -12606,6 +12647,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -12618,13 +12660,16 @@ targets:
   - src/core/lib/promise/inter_activity_pipe.h
   - src/core/lib/promise/poll.h
   - src/core/lib/promise/seq.h
+  - src/core/util/latent_see.h
   - test/core/promise/test_wakeup_schedulers.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/inter_activity_pipe_test.cc
   deps:
   - gtest
@@ -12669,6 +12714,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -12704,6 +12750,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - test/core/promise/test_context.h
   - third_party/upb/upb/generated_code_support.h
@@ -12734,6 +12781,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -12752,6 +12800,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/interceptor_list_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -13185,6 +13234,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -13200,13 +13250,16 @@ targets:
   - src/core/lib/promise/map.h
   - src/core/lib/promise/poll.h
   - src/core/lib/promise/seq.h
+  - src/core/util/latent_see.h
   - test/core/promise/test_wakeup_schedulers.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/latch_test.cc
   deps:
   - gtest
@@ -13375,6 +13428,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/manual_constructor.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/gprpp/status_helper.h
@@ -13418,6 +13472,7 @@ targets:
   - src/core/lib/slice/slice_internal.h
   - src/core/lib/slice/slice_refcount.h
   - src/core/lib/slice/slice_string_helpers.h
+  - src/core/util/latent_see.h
   - src/core/util/spinlock.h
   - test/core/promise/test_wakeup_schedulers.h
   - third_party/upb/upb/generated_code_support.h
@@ -13448,6 +13503,7 @@ targets:
   - src/core/lib/experiments/experiments.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/gprpp/status_helper.cc
   - src/core/lib/gprpp/time.cc
   - src/core/lib/iomgr/closure.cc
@@ -13466,6 +13522,7 @@ targets:
   - src/core/lib/slice/percent_encoding.cc
   - src/core/lib/slice/slice.cc
   - src/core/lib/slice/slice_string_helpers.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/map_pipe_test.cc
   - third_party/upb/upb/mini_descriptor/build_enum.c
   - third_party/upb/upb/mini_descriptor/decode.c
@@ -13985,6 +14042,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -13996,13 +14054,16 @@ targets:
   - src/core/lib/promise/poll.h
   - src/core/lib/promise/promise.h
   - src/core/lib/promise/wait_set.h
+  - src/core/util/latent_see.h
   - test/core/promise/poll_matcher.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/mpsc_test.cc
   deps:
   - gtest
@@ -14294,6 +14355,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/notification.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -14305,13 +14367,16 @@ targets:
   - src/core/lib/promise/map.h
   - src/core/lib/promise/observable.h
   - src/core/lib/promise/poll.h
+  - src/core/util/latent_see.h
   - test/core/promise/poll_matcher.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/observable_test.cc
   deps:
   - gtest
@@ -15228,6 +15293,7 @@ targets:
   - src/core/lib/gprpp/dump_args.h
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -15244,13 +15310,16 @@ targets:
   - src/core/lib/promise/promise.h
   - src/core/lib/promise/promise_mutex.h
   - src/core/lib/promise/seq.h
+  - src/core/util/latent_see.h
   - test/core/promise/test_wakeup_schedulers.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/promise_mutex_test.cc
   deps:
   - gtest
@@ -19730,6 +19799,7 @@ targets:
   - test/core/gprpp/table_test.cc
   deps:
   - gtest
+  - absl/log:check
   - absl/meta:type_traits
   - absl/utility:utility
   uses_polling: false
@@ -20930,6 +21000,7 @@ targets:
   deps:
   - gtest
   - absl/container:flat_hash_map
+  - absl/log:check
   - absl/strings:str_format
   uses_polling: false
 - name: unknown_frame_bad_client_test
@@ -20966,6 +21037,7 @@ targets:
   - test/core/util/useful_test.cc
   deps:
   - gtest
+  - absl/log:check
   uses_polling: false
 - name: uuid_v4_test
   gtest: true
@@ -21013,6 +21085,7 @@ targets:
   - src/core/lib/gprpp/glob.h
   - src/core/lib/gprpp/notification.h
   - src/core/lib/gprpp/orphanable.h
+  - src/core/lib/gprpp/per_cpu.h
   - src/core/lib/gprpp/ref_counted.h
   - src/core/lib/gprpp/ref_counted_ptr.h
   - src/core/lib/promise/activity.h
@@ -21023,13 +21096,16 @@ targets:
   - src/core/lib/promise/map.h
   - src/core/lib/promise/poll.h
   - src/core/lib/promise/wait_for_callback.h
+  - src/core/util/latent_see.h
   - test/core/promise/test_wakeup_schedulers.h
   src:
   - src/core/lib/debug/trace.cc
   - src/core/lib/debug/trace_flags.cc
   - src/core/lib/gprpp/dump_args.cc
   - src/core/lib/gprpp/glob.cc
+  - src/core/lib/gprpp/per_cpu.cc
   - src/core/lib/promise/activity.cc
+  - src/core/util/latent_see.cc
   - test/core/promise/wait_for_callback_test.cc
   deps:
   - gtest
diff --git a/config.m4 b/config.m4
index 00e36a726b9..942e82b053b 100644
--- a/config.m4
+++ b/config.m4
@@ -836,6 +836,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/util/json/json_reader.cc \
     src/core/util/json/json_util.cc \
     src/core/util/json/json_writer.cc \
+    src/core/util/latent_see.cc \
     src/core/util/linux/cpu.cc \
     src/core/util/linux/log.cc \
     src/core/util/log.cc \
diff --git a/config.w32 b/config.w32
index 56e9bbf62c1..b54524d8e59 100644
--- a/config.w32
+++ b/config.w32
@@ -801,6 +801,7 @@ if (PHP_GRPC != "no") {
     "src\\core\\util\\json\\json_reader.cc " +
     "src\\core\\util\\json\\json_util.cc " +
     "src\\core\\util\\json\\json_writer.cc " +
+    "src\\core\\util\\latent_see.cc " +
     "src\\core\\util\\linux\\cpu.cc " +
     "src\\core\\util\\linux\\log.cc " +
     "src\\core\\util\\log.cc " +
diff --git a/doc/core/latent_see.md b/doc/core/latent_see.md
new file mode 100644
index 00000000000..3003f9bd2ee
--- /dev/null
+++ b/doc/core/latent_see.md
@@ -0,0 +1,10 @@
+Latent-see
+----------
+
+This is a simple latency profiling tool.
+
+We record various timestamps throughout program execution, and then at exit format json
+to a file `latent_see.json` in the chrome event trace format. This format can be
+consumed by various tools (eg ui.perfetto.dev).
+
+Recording macros are documented in latent_see.h.
diff --git a/doc/xds-test-descriptions.md b/doc/xds-test-descriptions.md
index be2b3ff0eb6..f5e26192026 100644
--- a/doc/xds-test-descriptions.md
+++ b/doc/xds-test-descriptions.md
@@ -16,6 +16,8 @@ Server should accept these arguments:
 *   --secure_mode=BOOLEAN
     *   When set to true it uses XdsServerCredentials with the test server for security test cases.
         In case of secure mode, port and maintenance_port should be different.
+*   --enable-csm-observability=BOOLEAN
+    *   When set to true, enable CSM Observability.
 
 Servers that want to support dual stack testing (like Java) should also accept:
 
@@ -64,6 +66,12 @@ Clients should accept these arguments:
     *   The timeout to set on all outbound RPCs. Default is 20.
 *   --secure_mode=BOOLEAN
     *   When set to true it uses XdsChannelCredentials with the test client for security test cases.
+*   --enable-csm-observability=BOOLEAN
+    *   When set to true, enable CSM Observability.
+*   --request_payload_size=INT32
+    *   Set the SimpleRequest.payload.body to a string of repeated '0' characters of the given size in bytes.
+*   --response_payload_size=INT32
+    *   Ask the server to respond with SimpleResponse.payload.body of the given length.
 
 ### XdsUpdateClientConfigureService
 
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index bd21f0d9449..58667cbde56 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -1321,6 +1321,7 @@ Pod::Spec.new do |s|
                       'src/core/util/json/json_reader.h',
                       'src/core/util/json/json_util.h',
                       'src/core/util/json/json_writer.h',
+                      'src/core/util/latent_see.h',
                       'src/core/util/spinlock.h',
                       'src/core/util/string.h',
                       'src/core/util/time_precise.h',
@@ -2596,6 +2597,7 @@ Pod::Spec.new do |s|
                               'src/core/util/json/json_reader.h',
                               'src/core/util/json/json_util.h',
                               'src/core/util/json/json_writer.h',
+                              'src/core/util/latent_see.h',
                               'src/core/util/spinlock.h',
                               'src/core/util/string.h',
                               'src/core/util/time_precise.h',
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 0ec29d02d9a..1008d8ac8d7 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -2046,6 +2046,8 @@ Pod::Spec.new do |s|
                       'src/core/util/json/json_util.h',
                       'src/core/util/json/json_writer.cc',
                       'src/core/util/json/json_writer.h',
+                      'src/core/util/latent_see.cc',
+                      'src/core/util/latent_see.h',
                       'src/core/util/linux/cpu.cc',
                       'src/core/util/linux/log.cc',
                       'src/core/util/log.cc',
@@ -3369,6 +3371,7 @@ Pod::Spec.new do |s|
                               'src/core/util/json/json_reader.h',
                               'src/core/util/json/json_util.h',
                               'src/core/util/json/json_writer.h',
+                              'src/core/util/latent_see.h',
                               'src/core/util/spinlock.h',
                               'src/core/util/string.h',
                               'src/core/util/time_precise.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 502209e72cc..d64ac9befe3 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -1933,6 +1933,8 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/util/json/json_util.h )
   s.files += %w( src/core/util/json/json_writer.cc )
   s.files += %w( src/core/util/json/json_writer.h )
+  s.files += %w( src/core/util/latent_see.cc )
+  s.files += %w( src/core/util/latent_see.h )
   s.files += %w( src/core/util/linux/cpu.cc )
   s.files += %w( src/core/util/linux/log.cc )
   s.files += %w( src/core/util/log.cc )
diff --git a/package.xml b/package.xml
index 5b27bb11256..63d07ff1f5c 100644
--- a/package.xml
+++ b/package.xml
@@ -1915,6 +1915,8 @@
     <file baseinstalldir="/" name="src/core/util/json/json_util.h" role="src" />
     <file baseinstalldir="/" name="src/core/util/json/json_writer.cc" role="src" />
     <file baseinstalldir="/" name="src/core/util/json/json_writer.h" role="src" />
+    <file baseinstalldir="/" name="src/core/util/latent_see.cc" role="src" />
+    <file baseinstalldir="/" name="src/core/util/latent_see.h" role="src" />
     <file baseinstalldir="/" name="src/core/util/linux/cpu.cc" role="src" />
     <file baseinstalldir="/" name="src/core/util/linux/log.cc" role="src" />
     <file baseinstalldir="/" name="src/core/util/log.cc" role="src" />
diff --git a/src/core/BUILD b/src/core/BUILD
index 81d6af3ee44..f711c07c4e5 100644
--- a/src/core/BUILD
+++ b/src/core/BUILD
@@ -88,6 +88,9 @@ grpc_cc_library(
         "absl/functional:any_invocable",
         "absl/strings",
     ],
+    visibility = [
+        "@grpc:event_engine_base_hdrs",
+    ],
     deps = [
         ":memory_quota",
         "//:event_engine_base_hdrs",
@@ -130,6 +133,25 @@ grpc_cc_library(
     ],
 )
 
+grpc_cc_library(
+    name = "latent_see",
+    srcs = [
+        "util/latent_see.cc",
+    ],
+    hdrs = [
+        "util/latent_see.h",
+    ],
+    external_deps = [
+        "absl/log",
+        "absl/strings",
+        "absl/types:optional",
+    ],
+    deps = [
+        "per_cpu",
+        "//:gpr",
+    ],
+)
+
 grpc_cc_library(
     name = "transport_fwd",
     hdrs = [
@@ -581,6 +603,7 @@ grpc_cc_library(
         "construct_destruct",
         "context",
         "event_engine_context",
+        "latent_see",
         "poll",
         "promise_factory",
         "ref_counted",
@@ -961,6 +984,7 @@ grpc_cc_library(
         "construct_destruct",
         "context",
         "dump_args",
+        "latent_see",
         "no_destruct",
         "poll",
         "promise_factory",
diff --git a/src/core/lib/gprpp/work_serializer.cc b/src/core/lib/gprpp/work_serializer.cc
index 45de57f9ba8..2e2a9488acd 100644
--- a/src/core/lib/gprpp/work_serializer.cc
+++ b/src/core/lib/gprpp/work_serializer.cc
@@ -43,6 +43,7 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/telemetry/stats.h"
 #include "src/core/telemetry/stats_data.h"
+#include "src/core/util/latent_see.h"
 
 namespace grpc_core {
 
@@ -377,6 +378,8 @@ class WorkSerializer::DispatchingWorkSerializer final
   // rate of mutex acquisitions per work item tends towards 1.
   CallbackVector incoming_ ABSL_GUARDED_BY(mu_);
 
+  GPR_NO_UNIQUE_ADDRESS latent_see::Flow flow_;
+
 #ifndef NDEBUG
   static thread_local DispatchingWorkSerializer* running_work_serializer_;
 #endif
@@ -428,6 +431,8 @@ void WorkSerializer::DispatchingWorkSerializer::Run(
 
 // Implementation of EventEngine::Closure::Run - our actual work loop
 void WorkSerializer::DispatchingWorkSerializer::Run() {
+  GRPC_LATENT_SEE_PARENT_SCOPE("WorkSerializer::Run");
+  flow_.End();
   // TODO(ctiller): remove these when we can deprecate ExecCtx
   ApplicationCallbackExecCtx app_exec_ctx;
   ExecCtx exec_ctx;
@@ -457,6 +462,7 @@ void WorkSerializer::DispatchingWorkSerializer::Run() {
   if (processing_.empty() && !Refill()) return;
   // There's still work in processing_, so schedule ourselves again on
   // EventEngine.
+  flow_.Begin(GRPC_LATENT_SEE_METADATA("WorkSerializer::Link"));
   event_engine_->Run(this);
 }
 
diff --git a/src/core/lib/promise/activity.h b/src/core/lib/promise/activity.h
index 2b90c7cdb4b..715a28c0471 100644
--- a/src/core/lib/promise/activity.h
+++ b/src/core/lib/promise/activity.h
@@ -42,6 +42,7 @@
 #include "src/core/lib/promise/detail/promise_factory.h"
 #include "src/core/lib/promise/detail/status.h"
 #include "src/core/lib/promise/poll.h"
+#include "src/core/util/latent_see.h"
 
 namespace grpc_core {
 
@@ -545,6 +546,8 @@ class PromiseActivity final
   }
 
   void WakeupAsync(WakeupMask) final {
+    GRPC_LATENT_SEE_INNER_SCOPE("PromiseActivity::WakeupAsync");
+    wakeup_flow_.Begin(GRPC_LATENT_SEE_METADATA("Activity::Wakeup"));
     if (!wakeup_scheduled_.exchange(true, std::memory_order_acq_rel)) {
       // Can't safely run, so ask to run later.
       this->ScheduleWakeup();
@@ -568,6 +571,8 @@ class PromiseActivity final
   // In response to Wakeup, run the Promise state machine again until it
   // settles. Then check for completion, and if we have completed, call on_done.
   void Step() ABSL_LOCKS_EXCLUDED(mu()) {
+    GRPC_LATENT_SEE_PARENT_SCOPE("PromiseActivity::Step");
+    wakeup_flow_.End();
     // Poll the promise until things settle out under a lock.
     mu()->Lock();
     if (done_) {
@@ -644,6 +649,7 @@ class PromiseActivity final
     GPR_NO_UNIQUE_ADDRESS Promise promise;
   };
   GPR_NO_UNIQUE_ADDRESS PromiseHolder promise_holder_ ABSL_GUARDED_BY(mu());
+  GPR_NO_UNIQUE_ADDRESS latent_see::Flow wakeup_flow_;
 };
 
 }  // namespace promise_detail
diff --git a/src/core/lib/promise/party.cc b/src/core/lib/promise/party.cc
index 51b54259b08..e6a7b2285fd 100644
--- a/src/core/lib/promise/party.cc
+++ b/src/core/lib/promise/party.cc
@@ -27,6 +27,7 @@
 #include "src/core/lib/gprpp/sync.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/promise/activity.h"
+#include "src/core/util/latent_see.h"
 
 #ifdef GRPC_MAXIMIZE_THREADYNESS
 #include "src/core/lib/gprpp/thd.h"       // IWYU pragma: keep
@@ -214,6 +215,7 @@ void Party::ForceImmediateRepoll(WakeupMask mask) {
 }
 
 void Party::RunLocked() {
+  GRPC_LATENT_SEE_PARENT_SCOPE("Party::RunLocked");
   // If there is a party running, then we don't run it immediately
   // but instead add it to the end of the list of parties to run.
   // This enables a fairly straightforward batching of work from a
@@ -269,6 +271,7 @@ bool Party::RunParty() {
 }
 
 bool Party::RunOneParticipant(int i) {
+  GRPC_LATENT_SEE_INNER_SCOPE("Party::RunOneParticipant");
   // If the participant is null, skip.
   // This allows participants to complete whilst wakers still exist
   // somewhere.
diff --git a/src/core/lib/surface/client_call.cc b/src/core/lib/surface/client_call.cc
index 1d8b42ebbcf..83bf4cfb42a 100644
--- a/src/core/lib/surface/client_call.cc
+++ b/src/core/lib/surface/client_call.cc
@@ -59,6 +59,7 @@
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/telemetry/stats.h"
 #include "src/core/telemetry/stats_data.h"
+#include "src/core/util/latent_see.h"
 
 namespace grpc_core {
 
@@ -129,6 +130,7 @@ ClientCall::ClientCall(grpc_call*, uint32_t, grpc_completion_queue* cq,
 grpc_call_error ClientCall::StartBatch(const grpc_op* ops, size_t nops,
                                        void* notify_tag,
                                        bool is_notify_tag_closure) {
+  GRPC_LATENT_SEE_PARENT_SCOPE("ClientCall::StartBatch");
   if (nops == 0) {
     EndOpImmediately(cq_, notify_tag, is_notify_tag_closure);
     return GRPC_CALL_OK;
diff --git a/src/core/util/latent_see.cc b/src/core/util/latent_see.cc
new file mode 100644
index 00000000000..cdfaf51b509
--- /dev/null
+++ b/src/core/util/latent_see.cc
@@ -0,0 +1,113 @@
+// Copyright 2024 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/core/util/latent_see.h"
+
+#ifdef GRPC_ENABLE_LATENT_SEE
+#include <chrono>
+#include <cstdint>
+
+#include "absl/strings/str_cat.h"
+#include "absl/types/optional.h"
+
+namespace grpc_core {
+namespace latent_see {
+
+thread_local std::vector<Log::Event> Log::thread_events_;
+thread_local uint64_t Log::thread_id_ = Log::Get().next_thread_id_.fetch_add(1);
+std::atomic<uint64_t> Flow::next_flow_id_{1};
+
+std::string Log::GenerateJson() {
+  std::vector<RecordedEvent> events;
+  for (auto& fragment : fragments_) {
+    MutexLock lock(&fragment.mu);
+    events.insert(events.end(), fragment.events.begin(), fragment.events.end());
+  }
+  absl::optional<std::chrono::steady_clock::time_point> start_time;
+  for (auto& event : events) {
+    if (!start_time.has_value() || *start_time > event.event.timestamp) {
+      start_time = event.event.timestamp;
+    }
+  }
+  if (!start_time.has_value()) return "[]";
+  std::string json = "[\n";
+  bool first = true;
+  for (const auto& event : events) {
+    absl::string_view phase;
+    bool has_id;
+    switch (event.event.type) {
+      case EventType::kBegin:
+        phase = "B";
+        has_id = false;
+        break;
+      case EventType::kEnd:
+        phase = "E";
+        has_id = false;
+        break;
+      case EventType::kFlowStart:
+        phase = "s";
+        has_id = true;
+        break;
+      case EventType::kFlowEnd:
+        phase = "f";
+        has_id = true;
+        break;
+      case EventType::kMark:
+        phase = "i";
+        has_id = false;
+        break;
+    }
+    if (!first) absl::StrAppend(&json, ",\n");
+    first = false;
+    absl::StrAppend(&json, "{\"name\": ", event.event.metadata->name,
+                    ", \"ph\": \"", phase, "\", \"ts\": ",
+                    std::chrono::duration<double, std::micro>(
+                        event.event.timestamp - *start_time)
+                        .count(),
+                    ", \"pid\": 0, \"tid\": ", event.thread_id);
+    if (has_id) {
+      absl::StrAppend(&json, ", \"id\": ", event.event.id);
+    }
+    if (event.event.type == EventType::kFlowEnd) {
+      absl::StrAppend(&json, ", \"bp\": \"e\"");
+    }
+    absl::StrAppend(&json, ", \"args\": {\"file\": \"",
+                    event.event.metadata->file,
+                    "\", \"line\": ", event.event.metadata->line,
+                    ", \"batch\": ", event.batch_id, "}}");
+  }
+  absl::StrAppend(&json, "\n]");
+  return json;
+}
+
+void Log::FlushThreadLog() {
+  auto& thread_events = thread_events_;
+  if (thread_events.empty()) return;
+  auto& log = Get();
+  const auto batch_id =
+      log.next_batch_id_.fetch_add(1, std::memory_order_relaxed);
+  auto& fragment = log.fragments_.this_cpu();
+  const auto thread_id = thread_id_;
+  {
+    MutexLock lock(&fragment.mu);
+    for (auto event : thread_events) {
+      fragment.events.push_back(RecordedEvent{thread_id, batch_id, event});
+    }
+  }
+  thread_events.clear();
+}
+
+}  // namespace latent_see
+}  // namespace grpc_core
+#endif
diff --git a/src/core/util/latent_see.h b/src/core/util/latent_see.h
new file mode 100644
index 00000000000..c8e6686690d
--- /dev/null
+++ b/src/core/util/latent_see.h
@@ -0,0 +1,214 @@
+// Copyright 2024 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GRPC_SRC_CORE_UTIL_LATENT_SEE_H
+#define GRPC_SRC_CORE_UTIL_LATENT_SEE_H
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GRPC_ENABLE_LATENT_SEE
+#include <chrono>
+#include <cstdint>
+#include <utility>
+#include <vector>
+
+#include "absl/log/log.h"
+
+#include "src/core/lib/gprpp/per_cpu.h"
+#include "src/core/lib/gprpp/sync.h"
+
+namespace grpc_core {
+namespace latent_see {
+
+struct Metadata {
+  const char* file;
+  int line;
+  const char* name;
+};
+
+enum class EventType : uint8_t { kBegin, kEnd, kFlowStart, kFlowEnd, kMark };
+
+class Log {
+ public:
+  static void FlushThreadLog();
+
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION static void Append(
+      const Metadata* metadata, EventType type, uint64_t id) {
+    thread_events_.push_back(
+        Event{metadata, std::chrono::steady_clock::now(), id, type});
+  }
+
+ private:
+  Log() = default;
+
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION static Log& Get() {
+    static Log* log = []() {
+      atexit([] {
+        LOG(INFO) << "Writing latent_see.json in " << get_current_dir_name();
+        FILE* f = fopen("latent_see.json", "w");
+        if (f == nullptr) return;
+        fprintf(f, "%s", log->GenerateJson().c_str());
+        fclose(f);
+      });
+      return new Log();
+    }();
+    return *log;
+  }
+
+  std::string GenerateJson();
+
+  struct Event {
+    const Metadata* metadata;
+    std::chrono::steady_clock::time_point timestamp;
+    uint64_t id;
+    EventType type;
+  };
+  struct RecordedEvent {
+    uint64_t thread_id;
+    uint64_t batch_id;
+    Event event;
+  };
+  std::atomic<uint64_t> next_thread_id_{1};
+  std::atomic<uint64_t> next_batch_id_{1};
+  static thread_local std::vector<Event> thread_events_;
+  static thread_local uint64_t thread_id_;
+  struct Fragment {
+    Mutex mu;
+    std::vector<RecordedEvent> events ABSL_GUARDED_BY(mu);
+  };
+  PerCpu<Fragment> fragments_{PerCpuOptions()};
+};
+
+template <bool kFlush>
+class Scope {
+ public:
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION explicit Scope(const Metadata* metadata)
+      : metadata_(metadata) {
+    Log::Append(metadata_, EventType::kBegin, 0);
+  }
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION ~Scope() {
+    Log::Append(metadata_, EventType::kEnd, 0);
+    if (kFlush) Log::FlushThreadLog();
+  }
+
+  Scope(const Scope&) = delete;
+  Scope& operator=(const Scope&) = delete;
+
+ private:
+  const Metadata* const metadata_;
+};
+
+using ParentScope = Scope<true>;
+using InnerScope = Scope<false>;
+
+class Flow {
+ public:
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION Flow() : metadata_(nullptr) {}
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION explicit Flow(const Metadata* metadata)
+      : metadata_(metadata),
+        id_(next_flow_id_.fetch_add(1, std::memory_order_relaxed)) {
+    Log::Append(metadata_, EventType::kFlowStart, id_);
+  }
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION ~Flow() {
+    if (metadata_ != nullptr) {
+      Log::Append(metadata_, EventType::kFlowEnd, id_);
+    }
+  }
+
+  Flow(const Flow&) = delete;
+  Flow& operator=(const Flow&) = delete;
+  Flow(Flow&& other) noexcept
+      : metadata_(std::exchange(other.metadata_, nullptr)), id_(other.id_) {}
+  Flow& operator=(Flow&& other) noexcept {
+    if (metadata_ != nullptr) Log::Append(metadata_, EventType::kFlowEnd, id_);
+    metadata_ = std::exchange(other.metadata_, nullptr);
+    id_ = other.id_;
+    return *this;
+  }
+
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION bool is_active() const {
+    return metadata_ != nullptr;
+  }
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION void End() {
+    if (metadata_ == nullptr) return;
+    Log::Append(metadata_, EventType::kFlowEnd, id_);
+    metadata_ = nullptr;
+  }
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION void Begin(const Metadata* metadata) {
+    if (metadata_ != nullptr) Log::Append(metadata_, EventType::kFlowEnd, id_);
+    metadata_ = metadata;
+    if (metadata_ == nullptr) return;
+    id_ = next_flow_id_.fetch_add(1, std::memory_order_relaxed);
+    Log::Append(metadata_, EventType::kFlowStart, id_);
+  }
+
+ private:
+  const Metadata* metadata_;
+  uint64_t id_;
+  static std::atomic<uint64_t> next_flow_id_;
+};
+
+GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline void Mark(const Metadata* md) {
+  Log::Append(md, EventType::kMark, 0);
+}
+
+}  // namespace latent_see
+}  // namespace grpc_core
+#define GRPC_LATENT_SEE_METADATA(name)                                     \
+  []() {                                                                   \
+    static grpc_core::latent_see::Metadata metadata = {__FILE__, __LINE__, \
+                                                       #name};             \
+    return &metadata;                                                      \
+  }()
+// Parent scope: logs a begin and end event, and flushes the thread log on scope
+// exit. Because the flush takes some time it's better to place one parent scope
+// at the top of the stack, and use lighter weight scopes within it.
+#define GRPC_LATENT_SEE_PARENT_SCOPE(name)                       \
+  grpc_core::latent_see::ParentScope latent_see_scope##__LINE__( \
+      GRPC_LATENT_SEE_METADATA(name))
+// Inner scope: logs a begin and end event. Lighter weight than parent scope,
+// but does not flush the thread state - so should only be enclosed by a parent
+// scope.
+#define GRPC_LATENT_SEE_INNER_SCOPE(name)                       \
+  grpc_core::latent_see::InnerScope latent_see_scope##__LINE__( \
+      GRPC_LATENT_SEE_METADATA(name))
+// Mark: logs a single event.
+// This is not flushed automatically, and so should only be used within a parent
+// scope.
+#define GRPC_LATENT_SEE_MARK(name) \
+  grpc_core::latent_see::Mark(GRPC_LATENT_SEE_METADATA(name))
+#else  // !def(GRPC_ENABLE_LATENT_SEE)
+namespace grpc_core {
+namespace latent_see {
+struct Metadata {};
+struct Flow {
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION bool is_active() const { return false; }
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION void End() {}
+  GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION void Begin(Metadata*) {}
+};
+}  // namespace latent_see
+}  // namespace grpc_core
+#define GRPC_LATENT_SEE_METADATA(name) nullptr
+#define GRPC_LATENT_SEE_PARENT_SCOPE(name) \
+  do {                                     \
+  } while (0)
+#define GRPC_LATENT_SEE_INNER_SCOPE(name) \
+  do {                                    \
+  } while (0)
+#define GRPC_LATENT_SEE_MARK(name) \
+  do {                             \
+  } while (0)
+#endif  // GRPC_ENABLE_LATENT_SEE
+
+#endif  // GRPC_SRC_CORE_UTIL_LATENT_SEE_H
diff --git a/src/core/util/useful.h b/src/core/util/useful.h
index 9d8bcb6ff09..f7dadef5201 100644
--- a/src/core/util/useful.h
+++ b/src/core/util/useful.h
@@ -114,24 +114,24 @@ GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline constexpr uint32_t BitCount(
 }
 
 #if GRPC_HAS_BUILTIN(__builtin_ctz)
-GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline constexpr uint32_t
-CountTrailingZeros(uint32_t i) {
-  DCHECK_NE(i, 0);  // __builtin_ctz returns undefined behavior for 0
+GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline uint32_t CountTrailingZeros(
+    uint32_t i) {
+  DCHECK_NE(i, 0u);  // __builtin_ctz returns undefined behavior for 0
   return __builtin_ctz(i);
 }
-GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline constexpr uint32_t
-CountTrailingZeros(uint64_t i) {
-  DCHECK_NE(i, 0);  // __builtin_ctz returns undefined behavior for 0
+GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline uint32_t CountTrailingZeros(
+    uint64_t i) {
+  DCHECK_NE(i, 0u);  // __builtin_ctz returns undefined behavior for 0
   return __builtin_ctzll(i);
 }
 #else
-GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline constexpr uint32_t
-CountTrailingZeros(uint32_t i) {
+GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline uint32_t CountTrailingZeros(
+    uint32_t i) {
   DCHECK_NE(i, 0);  // __builtin_ctz returns undefined behavior for 0
   return BitCount((i & -i) - 1);
 }
-GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline constexpr uint32_t
-CountTrailingZeros(uint64_t i) {
+GPR_ATTRIBUTE_ALWAYS_INLINE_FUNCTION inline uint32_t CountTrailingZeros(
+    uint64_t i) {
   DCHECK_NE(i, 0);  // __builtin_ctz returns undefined behavior for 0
   return BitCount((i & -i) - 1);
 }
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index f25afdd0126..c46806945a0 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -810,6 +810,7 @@ CORE_SOURCE_FILES = [
     'src/core/util/json/json_reader.cc',
     'src/core/util/json/json_util.cc',
     'src/core/util/json/json_writer.cc',
+    'src/core/util/latent_see.cc',
     'src/core/util/linux/cpu.cc',
     'src/core/util/linux/log.cc',
     'src/core/util/log.cc',
diff --git a/test/core/transport/call_spine_benchmarks.h b/test/core/transport/call_spine_benchmarks.h
index 47463ac9c76..9c09ef95f87 100644
--- a/test/core/transport/call_spine_benchmarks.h
+++ b/test/core/transport/call_spine_benchmarks.h
@@ -220,12 +220,13 @@ void BM_ClientToServerStreaming(benchmark::State& state) {
     handler_done.WaitForNotification();
     initiator_done.WaitForNotification();
   }
-  call.initiator.SpawnInfallible("done", [&]() {
-    call.initiator.Cancel();
-    return Empty{};
-  });
-  call.handler.SpawnInfallible("done", [&]() {
-    call.handler.PushServerTrailingMetadata(
+  call.initiator.SpawnInfallible("done",
+                                 [initiator = call.initiator]() mutable {
+                                   initiator.Cancel();
+                                   return Empty{};
+                                 });
+  call.handler.SpawnInfallible("done", [handler = call.handler]() mutable {
+    handler.PushServerTrailingMetadata(
         CancelledServerMetadataFromStatus(absl::CancelledError()));
     return Empty{};
   });
diff --git a/tools/bazel.rc b/tools/bazel.rc
index 3d98df37012..379f6d4c3d2 100644
--- a/tools/bazel.rc
+++ b/tools/bazel.rc
@@ -35,6 +35,8 @@ build --define=use_fast_cpp_protos=true
 build:opt --compilation_mode=opt
 build:opt --copt=-Wframe-larger-than=16384
 
+build:latent_see --copt=-DGRPC_ENABLE_LATENT_SEE
+
 build:dbg --compilation_mode=dbg
 
 # Dynamic link cause issues like: `dyld: malformed mach-o: load commands size (59272) > 32768`
diff --git a/tools/bazelify_tests/test/portability_tests.bzl b/tools/bazelify_tests/test/portability_tests.bzl
index 006d1f48b45..e7852dfb149 100644
--- a/tools/bazelify_tests/test/portability_tests.bzl
+++ b/tools/bazelify_tests/test/portability_tests.bzl
@@ -56,13 +56,13 @@ def generate_run_tests_portability_tests(name):
             # TODO(https://github.com/grpc/grpc/issues/36751): Replace gcc_8 with gcc_7 once it's fixed.
             # ["gcc_7", "", "tools/dockerfile/test/cxx_gcc_7_x64.current_version"],
             ["gcc_8", "", "tools/dockerfile/test/cxx_gcc_8_x64.current_version"],
-            ["gcc_12", "--cmake_configure_extra_args=-DCMAKE_CXX_STANDARD=20", "tools/dockerfile/test/cxx_gcc_12_x64.current_version"],
+            ["gcc_12_cxx20", "--cmake_configure_extra_args=-DCMAKE_CXX_STANDARD=20", "tools/dockerfile/test/cxx_gcc_12_x64.current_version"],
             ["gcc10.2_openssl102", "--cmake_configure_extra_args=-DgRPC_SSL_PROVIDER=package", "tools/dockerfile/test/cxx_debian11_openssl102_x64.current_version"],
             ["gcc10.2_openssl111", "--cmake_configure_extra_args=-DgRPC_SSL_PROVIDER=package", "tools/dockerfile/test/cxx_debian11_openssl111_x64.current_version"],
             ["gcc_12_openssl309", "--cmake_configure_extra_args=-DgRPC_SSL_PROVIDER=package", "tools/dockerfile/test/cxx_debian12_openssl309_x64.current_version"],
             ["gcc_musl", "", "tools/dockerfile/test/cxx_alpine_x64.current_version"],
             ["clang_6", "--cmake_configure_extra_args=-DCMAKE_C_COMPILER=clang --cmake_configure_extra_args=-DCMAKE_CXX_COMPILER=clang++", "tools/dockerfile/test/cxx_clang_6_x64.current_version"],
-            ["clang_17", "--cmake_configure_extra_args=-DCMAKE_C_COMPILER=clang --cmake_configure_extra_args=-DCMAKE_CXX_COMPILER=clang++", "tools/dockerfile/test/cxx_clang_17_x64.current_version"],
+            ["clang_17_cxx23", "--cmake_configure_extra_args=-DCMAKE_C_COMPILER=clang --cmake_configure_extra_args=-DCMAKE_CXX_COMPILER=clang++ --cmake_configure_extra_args=-DCMAKE_CXX_STANDARD=23", "tools/dockerfile/test/cxx_clang_17_x64.current_version"],
         ]
 
         for compiler_name, args, docker_image_version in compiler_configs:
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index a3b4c83cbec..aed08bb8420 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -2937,6 +2937,8 @@ src/core/util/json/json_util.cc \
 src/core/util/json/json_util.h \
 src/core/util/json/json_writer.cc \
 src/core/util/json/json_writer.h \
+src/core/util/latent_see.cc \
+src/core/util/latent_see.h \
 src/core/util/linux/cpu.cc \
 src/core/util/linux/log.cc \
 src/core/util/log.cc \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 2453f576cb9..3242f05f88b 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -777,6 +777,7 @@ doc/core/epoll-polling-engine.md \
 doc/core/grpc-client-server-polling-engine-usage.md \
 doc/core/grpc-cq.md \
 doc/core/grpc-polling-engines.md \
+doc/core/latent_see.md \
 doc/core/moving-to-c++.md \
 doc/core/pending_api_cleanups.md \
 doc/core/transport_explainer.md \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 1e05cb5fce8..7d92ca90642 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -777,6 +777,7 @@ doc/core/epoll-polling-engine.md \
 doc/core/grpc-client-server-polling-engine-usage.md \
 doc/core/grpc-cq.md \
 doc/core/grpc-polling-engines.md \
+doc/core/latent_see.md \
 doc/core/moving-to-c++.md \
 doc/core/pending_api_cleanups.md \
 doc/core/transport_explainer.md \
@@ -2716,6 +2717,8 @@ src/core/util/json/json_util.cc \
 src/core/util/json/json_util.h \
 src/core/util/json/json_writer.cc \
 src/core/util/json/json_writer.h \
+src/core/util/latent_see.cc \
+src/core/util/latent_see.h \
 src/core/util/linux/cpu.cc \
 src/core/util/linux/log.cc \
 src/core/util/log.cc \