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Merge pull request #10467 from sreecha/bm_cq_multi_threads
Microbenchmark for measuring impact of multiple threads calling cq_nextpull/10237/head
Sree Kuchibhotla
8 years ago
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GitHub
commit
93aa1e7995
9 changed files with 329 additions and 4 deletions
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/*
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* |
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* Copyright 2017, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include <benchmark/benchmark.h> |
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#include <string.h> |
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#include <atomic> |
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#include <grpc/grpc.h> |
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#include "test/cpp/microbenchmarks/helpers.h" |
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extern "C" { |
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#include "src/core/lib/iomgr/ev_posix.h" |
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#include "src/core/lib/iomgr/port.h" |
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#include "src/core/lib/surface/completion_queue.h" |
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} |
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struct grpc_pollset { |
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gpr_mu mu; |
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}; |
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namespace grpc { |
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namespace testing { |
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static void* make_tag(int i) { return (void*)(intptr_t)i; } |
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static grpc_completion_queue* g_cq; |
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static grpc_event_engine_vtable g_vtable; |
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static __thread int g_thread_idx; |
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static __thread grpc_cq_completion g_cq_completion; |
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static void pollset_shutdown(grpc_exec_ctx* exec_ctx, grpc_pollset* ps, |
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grpc_closure* closure) { |
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grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE); |
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} |
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static void pollset_init(grpc_pollset* ps, gpr_mu** mu) { |
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gpr_mu_init(&ps->mu); |
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*mu = &ps->mu; |
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} |
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static void pollset_destroy(grpc_pollset* ps) { gpr_mu_destroy(&ps->mu); } |
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static grpc_error* pollset_kick(grpc_pollset* p, grpc_pollset_worker* worker) { |
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return GRPC_ERROR_NONE; |
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} |
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/* Callback when the tag is dequeued from the completion queue. Does nothing */ |
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static void cq_done_cb(grpc_exec_ctx* exec_ctx, void* done_arg, |
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grpc_cq_completion* cq_completion) {} |
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/* Queues a completion tag. ZERO polling overhead */ |
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static grpc_error* pollset_work(grpc_exec_ctx* exec_ctx, grpc_pollset* ps, |
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grpc_pollset_worker** worker, gpr_timespec now, |
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gpr_timespec deadline) { |
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gpr_mu_unlock(&ps->mu); |
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grpc_cq_end_op(exec_ctx, g_cq, make_tag(g_thread_idx), GRPC_ERROR_NONE, |
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cq_done_cb, NULL, &g_cq_completion); |
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grpc_exec_ctx_flush(exec_ctx); |
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gpr_mu_lock(&ps->mu); |
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return GRPC_ERROR_NONE; |
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} |
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static void init_engine_vtable() { |
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memset(&g_vtable, 0, sizeof(g_vtable)); |
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g_vtable.pollset_size = sizeof(grpc_pollset); |
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g_vtable.pollset_init = pollset_init; |
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g_vtable.pollset_shutdown = pollset_shutdown; |
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g_vtable.pollset_destroy = pollset_destroy; |
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g_vtable.pollset_work = pollset_work; |
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g_vtable.pollset_kick = pollset_kick; |
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} |
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static void setup() { |
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grpc_init(); |
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init_engine_vtable(); |
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grpc_set_event_engine_test_only(&g_vtable); |
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g_cq = grpc_completion_queue_create(NULL); |
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} |
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static void BM_Cq_Throughput(benchmark::State& state) { |
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TrackCounters track_counters; |
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gpr_timespec deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC); |
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if (state.thread_index == 0) { |
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setup(); |
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} |
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while (state.KeepRunning()) { |
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g_thread_idx = state.thread_index; |
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void* dummy_tag = make_tag(g_thread_idx); |
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grpc_cq_begin_op(g_cq, dummy_tag); |
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grpc_completion_queue_next(g_cq, deadline, NULL); |
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} |
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state.SetItemsProcessed(state.iterations()); |
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if (state.thread_index == 0) { |
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grpc_completion_queue_shutdown(g_cq); |
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grpc_completion_queue_destroy(g_cq); |
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} |
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track_counters.Finish(state); |
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} |
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BENCHMARK(BM_Cq_Throughput)->ThreadRange(1, 16)->UseRealTime(); |
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} // namespace testing
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} // namespace grpc
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BENCHMARK_MAIN(); |
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