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deps: cherry-pick 15c0c3a8ba and 43e2fb1c3d from upstream V8 #19200

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deps: cherry-pick 15c0c3a8ba and 43e2fb1c3d from upstream V8 #19200

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2 changes: 1 addition & 1 deletion common.gypi
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@

# Reset this number to 0 on major V8 upgrades.
# Increment by one for each non-official patch applied to deps/v8.
'v8_embedder_string': '-node.4',
'v8_embedder_string': '-node.5',

# Enable disassembler for `--print-code` v8 options
'v8_enable_disassembler': 1,
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15 changes: 9 additions & 6 deletions deps/v8/src/profiler/cpu-profiler.cc
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Expand Up @@ -165,13 +165,16 @@ void ProfilerEventsProcessor::Run() {

if (nextSampleTime > now) {
#if V8_OS_WIN
// Do not use Sleep on Windows as it is very imprecise.
// Could be up to 16ms jitter, which is unacceptable for the purpose.
while (base::TimeTicks::HighResolutionNow() < nextSampleTime) {
}
#else
base::OS::Sleep(nextSampleTime - now);
if (nextSampleTime - now < base::TimeDelta::FromMilliseconds(100)) {
// Do not use Sleep on Windows as it is very imprecise, with up to 16ms
// jitter, which is unacceptable for short profile intervals.
while (base::TimeTicks::HighResolutionNow() < nextSampleTime) {
}
} else // NOLINT
#endif
{
base::OS::Sleep(nextSampleTime - now);
}
}

// Schedule next sample. sampler_ is nullptr in tests.
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