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mdbx: доработка osal_jitter() для уменьшения задержек в тестах под Windows.

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Леонид Юрьев (Leonid Yuriev) 2024-10-08 00:33:33 +03:00
parent bf58ec59f5
commit ecf862a4f6
1 changed files with 20 additions and 5 deletions
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23
src/osal.c
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@ -2761,7 +2761,9 @@ __cold MDBX_INTERNAL void osal_jitter(bool tiny) {
for (;;) {
#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || \
defined(__x86_64__)
const unsigned salt = 277u * (unsigned)__rdtsc();
unsigned salt = 5296013u * (unsigned)__rdtsc();
salt ^= salt >> 11;
salt *= 25810541u;
#elif (defined(_WIN32) || defined(_WIN64)) && MDBX_WITHOUT_MSVC_CRT
static ULONG state;
const unsigned salt = (unsigned)RtlRandomEx(&state);
@ -2769,13 +2771,26 @@ __cold MDBX_INTERNAL void osal_jitter(bool tiny) {
const unsigned salt = rand();
#endif
const unsigned coin = salt % (tiny ? 29u : 43u);
const int coin = salt % (tiny ? 29u : 43u);
if (coin < 43 / 3)
break;
#if defined(_WIN32) || defined(_WIN64)
if (coin < 43 * 2 / 3)
SwitchToThread();
if (coin > 43 * 2 / 3)
Sleep(1);
else {
static HANDLE timer;
if (!timer)
timer = CreateWaitableTimer(NULL, TRUE, NULL);
LARGE_INTEGER ft;
ft.QuadPart =
coin * (int64_t)-10; // Convert to 100 nanosecond interval,
// negative value indicates relative time.
SetWaitableTimer(timer, &ft, 0, NULL, NULL, 0);
WaitForSingleObject(timer, INFINITE);
// CloseHandle(timer);
break;
}
#else
sched_yield();
if (coin > 43 * 2 / 3)