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