[experiments] Remove pending_queue_cap experiment (#36632)

Closes #36632

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36632 from ctiller:transport-refs-5 de23da2a54
PiperOrigin-RevId: 634177606

bazel/experiments.bzl

@@ -31,7 +31,6 @@ EXPERIMENT_ENABLES = {
     "monitoring_experiment": "monitoring_experiment",
     "multiping": "multiping",
     "peer_state_based_framing": "peer_state_based_framing",
-    "pending_queue_cap": "pending_queue_cap",
     "pick_first_new": "pick_first_new",
     "promise_based_client_call": "event_engine_client,event_engine_listener,promise_based_client_call",
     "chaotic_good": "chaotic_good,event_engine_client,event_engine_listener,promise_based_client_call",

src/core/lib/experiments/experiments.cc

@@ -70,14 +70,6 @@ const char* const description_peer_state_based_framing =
     "on the peer's memory pressure which is reflected in its max http2 frame "
     "size.";
 const char* const additional_constraints_peer_state_based_framing = "{}";
-const char* const description_pending_queue_cap =
-    "In the sync & async apis (but not the callback api), cap the number of "
-    "received but unrequested requests in the server for each call type. A "
-    "received message is one that was read from the wire on the server. A "
-    "requested message is one explicitly requested by the application using "
-    "grpc_server_request_call or grpc_server_request_registered_call (or their "
-    "wrappers in the C++ API).";
-const char* const additional_constraints_pending_queue_cap = "{}";
 const char* const description_pick_first_new =
     "New pick_first impl with memory reduction.";
 const char* const additional_constraints_pick_first_new = "{}";
@@ -171,8 +163,6 @@ const ExperimentMetadata g_experiment_metadata[] = {
      nullptr, 0, false, true},
     {"peer_state_based_framing", description_peer_state_based_framing,
      additional_constraints_peer_state_based_framing, nullptr, 0, false, true},
-    {"pending_queue_cap", description_pending_queue_cap,
-     additional_constraints_pending_queue_cap, nullptr, 0, true, true},
     {"pick_first_new", description_pick_first_new,
      additional_constraints_pick_first_new, nullptr, 0, true, true},
     {"promise_based_client_call", description_promise_based_client_call,
@@ -262,14 +252,6 @@ const char* const description_peer_state_based_framing =
     "on the peer's memory pressure which is reflected in its max http2 frame "
     "size.";
 const char* const additional_constraints_peer_state_based_framing = "{}";
-const char* const description_pending_queue_cap =
-    "In the sync & async apis (but not the callback api), cap the number of "
-    "received but unrequested requests in the server for each call type. A "
-    "received message is one that was read from the wire on the server. A "
-    "requested message is one explicitly requested by the application using "
-    "grpc_server_request_call or grpc_server_request_registered_call (or their "
-    "wrappers in the C++ API).";
-const char* const additional_constraints_pending_queue_cap = "{}";
 const char* const description_pick_first_new =
     "New pick_first impl with memory reduction.";
 const char* const additional_constraints_pick_first_new = "{}";
@@ -363,8 +345,6 @@ const ExperimentMetadata g_experiment_metadata[] = {
      nullptr, 0, false, true},
     {"peer_state_based_framing", description_peer_state_based_framing,
      additional_constraints_peer_state_based_framing, nullptr, 0, false, true},
-    {"pending_queue_cap", description_pending_queue_cap,
-     additional_constraints_pending_queue_cap, nullptr, 0, true, true},
     {"pick_first_new", description_pick_first_new,
      additional_constraints_pick_first_new, nullptr, 0, true, true},
     {"promise_based_client_call", description_promise_based_client_call,
@@ -454,14 +434,6 @@ const char* const description_peer_state_based_framing =
     "on the peer's memory pressure which is reflected in its max http2 frame "
     "size.";
 const char* const additional_constraints_peer_state_based_framing = "{}";
-const char* const description_pending_queue_cap =
-    "In the sync & async apis (but not the callback api), cap the number of "
-    "received but unrequested requests in the server for each call type. A "
-    "received message is one that was read from the wire on the server. A "
-    "requested message is one explicitly requested by the application using "
-    "grpc_server_request_call or grpc_server_request_registered_call (or their "
-    "wrappers in the C++ API).";
-const char* const additional_constraints_pending_queue_cap = "{}";
 const char* const description_pick_first_new =
     "New pick_first impl with memory reduction.";
 const char* const additional_constraints_pick_first_new = "{}";
@@ -555,8 +527,6 @@ const ExperimentMetadata g_experiment_metadata[] = {
      nullptr, 0, false, true},
     {"peer_state_based_framing", description_peer_state_based_framing,
      additional_constraints_peer_state_based_framing, nullptr, 0, false, true},
-    {"pending_queue_cap", description_pending_queue_cap,
-     additional_constraints_pending_queue_cap, nullptr, 0, true, true},
     {"pick_first_new", description_pick_first_new,
      additional_constraints_pick_first_new, nullptr, 0, true, true},
     {"promise_based_client_call", description_promise_based_client_call,

src/core/lib/experiments/experiments.h

@@ -74,8 +74,6 @@ inline bool IsKeepaliveServerFixEnabled() { return false; }
 inline bool IsMonitoringExperimentEnabled() { return true; }
 inline bool IsMultipingEnabled() { return false; }
 inline bool IsPeerStateBasedFramingEnabled() { return false; }
-#define GRPC_EXPERIMENT_IS_INCLUDED_PENDING_QUEUE_CAP
-inline bool IsPendingQueueCapEnabled() { return true; }
 #define GRPC_EXPERIMENT_IS_INCLUDED_PICK_FIRST_NEW
 inline bool IsPickFirstNewEnabled() { return true; }
 inline bool IsPromiseBasedClientCallEnabled() { return false; }
@@ -113,8 +111,6 @@ inline bool IsKeepaliveServerFixEnabled() { return false; }
 inline bool IsMonitoringExperimentEnabled() { return true; }
 inline bool IsMultipingEnabled() { return false; }
 inline bool IsPeerStateBasedFramingEnabled() { return false; }
-#define GRPC_EXPERIMENT_IS_INCLUDED_PENDING_QUEUE_CAP
-inline bool IsPendingQueueCapEnabled() { return true; }
 #define GRPC_EXPERIMENT_IS_INCLUDED_PICK_FIRST_NEW
 inline bool IsPickFirstNewEnabled() { return true; }
 inline bool IsPromiseBasedClientCallEnabled() { return false; }
@@ -152,8 +148,6 @@ inline bool IsKeepaliveServerFixEnabled() { return false; }
 inline bool IsMonitoringExperimentEnabled() { return true; }
 inline bool IsMultipingEnabled() { return false; }
 inline bool IsPeerStateBasedFramingEnabled() { return false; }
-#define GRPC_EXPERIMENT_IS_INCLUDED_PENDING_QUEUE_CAP
-inline bool IsPendingQueueCapEnabled() { return true; }
 #define GRPC_EXPERIMENT_IS_INCLUDED_PICK_FIRST_NEW
 inline bool IsPickFirstNewEnabled() { return true; }
 inline bool IsPromiseBasedClientCallEnabled() { return false; }
@@ -189,7 +183,6 @@ enum ExperimentIds {
   kExperimentIdMonitoringExperiment,
   kExperimentIdMultiping,
   kExperimentIdPeerStateBasedFraming,
-  kExperimentIdPendingQueueCap,
   kExperimentIdPickFirstNew,
   kExperimentIdPromiseBasedClientCall,
   kExperimentIdChaoticGood,
@@ -261,10 +254,6 @@ inline bool IsMultipingEnabled() {
 inline bool IsPeerStateBasedFramingEnabled() {
   return IsExperimentEnabled(kExperimentIdPeerStateBasedFraming);
 }
-#define GRPC_EXPERIMENT_IS_INCLUDED_PENDING_QUEUE_CAP
-inline bool IsPendingQueueCapEnabled() {
-  return IsExperimentEnabled(kExperimentIdPendingQueueCap);
-}
 #define GRPC_EXPERIMENT_IS_INCLUDED_PICK_FIRST_NEW
 inline bool IsPickFirstNewEnabled() {
   return IsExperimentEnabled(kExperimentIdPickFirstNew);

src/core/lib/experiments/experiments.yaml

@@ -139,17 +139,6 @@
   expiry: 2024/08/01
   owner: vigneshbabu@google.com
   test_tags: ["flow_control_test"]
-- name: pending_queue_cap
-  description:
-    In the sync & async apis (but not the callback api), cap the number of
-    received but unrequested requests in the server for each call type.
-    A received message is one that was read from the wire on the server.
-    A requested message is one explicitly requested by the application using
-    grpc_server_request_call or grpc_server_request_registered_call (or their
-    wrappers in the C++ API).
-  expiry: 2024/05/05
-  owner: ctiller@google.com
-  test_tags: []
 - name: pick_first_new
   description: New pick_first impl with memory reduction.
   expiry: 2024/07/30