mirror of https://github.com/grpc/grpc.git
Craig Tiller
9 years ago
commit
82116f6813
8 changed files with 436 additions and 1 deletions
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/*
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* |
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* Copyright 2015, 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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|
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/* Test gpr per-cpu support:
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gpr_cpu_num_cores() |
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gpr_cpu_current_cpu() |
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*/ |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/cpu.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/sync.h> |
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#include <grpc/support/thd.h> |
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#include <grpc/support/time.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "test/core/util/test_config.h" |
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/* Test structure is essentially:
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1) Figure out how many cores are present on the test system |
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2) Create 3 times that many threads |
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3) Have each thread do some amount of work (basically want to |
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gaurantee that all threads are running at once, and enough of them |
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to run on all cores). |
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4) Each thread checks what core it is running on, and marks that core |
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as "used" in the test. |
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5) Count number of "used" cores. |
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The test will fail if: |
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1) gpr_cpu_num_cores() == 0 |
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2) Any result from gpr_cpu_current_cpu() >= gpr_cpu_num_cores() |
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3) Ideally, we would fail if not all cores were seen as used. Unfortunately, |
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this is only probabilistically true, and depends on the OS, it's |
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scheduler, etc. So we just print out an indication of how many were seen; |
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hopefully developers can use this to sanity check their system. |
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*/ |
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/* Status shared across threads */ |
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struct cpu_test { |
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gpr_mu mu; |
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int nthreads; |
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gpr_uint32 ncores; |
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int is_done; |
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gpr_cv done_cv; |
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int *used; /* is this core used? */ |
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int r; /* random number */ |
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}; |
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static void worker_thread(void *arg) { |
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struct cpu_test *ct = (struct cpu_test *)arg; |
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gpr_uint32 cpu; |
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int r = 12345678; |
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int i, j; |
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for (i = 0; i < 1000; i++) { |
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/* run for a bit - just calculate something random. */ |
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for (j = 0; j < 1000000; j++) { |
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r = (r * 17) & ((r - i) | (r * i)); |
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} |
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cpu = gpr_cpu_current_cpu(); |
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GPR_ASSERT(cpu < ct->ncores); |
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gpr_mu_lock(&ct->mu); |
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ct->used[cpu] = 1; |
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gpr_mu_unlock(&ct->mu); |
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} |
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gpr_mu_lock(&ct->mu); |
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ct->r = r; /* make it look like we care about r's value... */ |
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ct->nthreads--; |
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if (ct->nthreads == 0) { |
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ct->is_done = 1; |
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gpr_cv_signal(&ct->done_cv); |
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} |
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gpr_mu_unlock(&ct->mu); |
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} |
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static void cpu_test(void) { |
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gpr_uint32 i; |
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int cores_seen = 0; |
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struct cpu_test ct; |
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gpr_thd_id thd; |
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ct.ncores = gpr_cpu_num_cores(); |
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GPR_ASSERT(ct.ncores > 0); |
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ct.nthreads = (int)ct.ncores * 3; |
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ct.used = gpr_malloc(ct.ncores * sizeof(int)); |
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memset(ct.used, 0, ct.ncores * sizeof(int)); |
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gpr_mu_init(&ct.mu); |
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gpr_cv_init(&ct.done_cv); |
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ct.is_done = 0; |
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for (i = 0; i < ct.ncores * 3; i++) { |
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GPR_ASSERT(gpr_thd_new(&thd, &worker_thread, &ct, NULL)); |
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} |
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gpr_mu_lock(&ct.mu); |
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while (!ct.is_done) { |
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gpr_cv_wait(&ct.done_cv, &ct.mu, gpr_inf_future(GPR_CLOCK_REALTIME)); |
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} |
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gpr_mu_unlock(&ct.mu); |
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fprintf(stderr, "Saw cores ["); |
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for (i = 0; i < ct.ncores; i++) { |
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if (ct.used[i]) { |
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fprintf(stderr, "%d,", i); |
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cores_seen++; |
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} |
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} |
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fprintf(stderr, "] (%d/%d)\n", cores_seen, ct.ncores); |
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gpr_free(ct.used); |
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} |
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int main(int argc, char *argv[]) { |
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grpc_test_init(argc, argv); |
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cpu_test(); |
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return 0; |
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} |
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@ -0,0 +1,178 @@ |
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@ -0,0 +1,21 @@ |
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|
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