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replay: use nanosleep on MacOS (#32263)

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* use nanosleep on MacOS

* Update tools/replay/util.cc

Co-authored-by: Willem Melching <willem.melching@gmail.com>

---------

Co-authored-by: Willem Melching <willem.melching@gmail.com>
This commit is contained in:
Dean Lee
2024-04-23 04:22:53 +08:00
committed by GitHub
parent 20c6cbc1d2
commit 618d73efd0
1 changed files with 18 additions and 0 deletions
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tools/replay/util.cc
+18
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@@ -318,6 +318,23 @@ std::string decompressBZ2(const std::byte *in, size_t in_size, std::atomic<bool>
}
void precise_nano_sleep(int64_t nanoseconds) {
#ifdef __APPLE__
const long estimate_ns = 1 * 1e6; // 1ms
struct timespec req = {.tv_nsec = estimate_ns};
uint64_t start_sleep = nanos_since_boot();
while (nanoseconds > estimate_ns) {
nanosleep(&req, nullptr);
uint64_t end_sleep = nanos_since_boot();
nanoseconds -= (end_sleep - start_sleep);
start_sleep = end_sleep;
}
// spin wait
if (nanoseconds > 0) {
while ((nanos_since_boot() - start_sleep) <= nanoseconds) {
std::this_thread::yield();
}
}
#else
struct timespec req, rem;
req.tv_sec = nanoseconds / 1e9;
@@ -326,6 +343,7 @@ void precise_nano_sleep(int64_t nanoseconds) {
// Retry sleep if interrupted by a signal
req = rem;
}
#endif
}
std::string sha256(const std::string &str) {