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Remove CPU cache contention for instrumented code #81932

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Feb 10, 2023
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Remove CPU cache contention for instrumented code #81932

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8 changes: 4 additions & 4 deletions src/coreclr/vm/jithelpers.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5407,12 +5407,12 @@ void JIT_PartialCompilationPatchpoint(int* counter, int ilOffset)

static unsigned HandleHistogramProfileRand()
{
// generate a random number (xorshift32)
// Generate a random number (xorshift32)
//
// intentionally simple so we can have multithreaded
// access w/o tearing state.
// Intentionally simple for faster random. It's stored in TLS to avoid
// multithread contention.
//
static volatile unsigned s_rng = 100;
static thread_local unsigned s_rng = 100;

unsigned x = s_rng;
x ^= x << 13;
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