46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
// RUN: %clangxx_tsan %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s
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// bench.h needs pthread barriers which are not available on OS X
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// UNSUPPORTED: darwin
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#include "bench.h"
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void *nop_thread(void *arg) {
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pthread_setname_np(pthread_self(), "nop_thread");
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return nullptr;
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}
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void thread(int tid) {
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for (int i = 0; i < bench_niter; i++) {
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pthread_t th;
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pthread_create(&th, nullptr, nop_thread, nullptr);
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pthread_join(th, nullptr);
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}
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}
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void bench() {
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// Benchmark thread creation/joining in presence of a large number
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// of threads (both alive and already joined).
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printf("starting transient threads...\n");
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for (int i = 0; i < 200; i++) {
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const int kBatch = 100;
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pthread_t th[kBatch];
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for (int j = 0; j < kBatch; j++)
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pthread_create(&th[j], nullptr, nop_thread, nullptr);
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for (int j = 0; j < kBatch; j++)
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pthread_join(th[j], nullptr);
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}
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printf("starting persistent threads...\n");
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const int kLiveThreads = 2000;
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pthread_t th[kLiveThreads];
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for (int j = 0; j < kLiveThreads; j++)
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pthread_create(&th[j], nullptr, nop_thread, nullptr);
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printf("starting benchmark threads...\n");
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start_thread_group(bench_nthread, thread);
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for (int j = 0; j < kLiveThreads; j++)
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pthread_join(th[j], nullptr);
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}
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// CHECK: DONE
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