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Issue #1829 - Revert "Issue #1751"

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Brian Smith 2022-04-26 11:34:08 -05:00 • committed by roytam1
commit 13fcc4a046
949 changed files with 95662 additions and 444 deletions
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15
xpcom/threads/nsThread.cpp
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@ -52,6 +52,11 @@
#define HAVE_SCHED_SETAFFINITY
#endif
#ifdef XP_MACOSX
#include <mach/mach.h>
#include <mach/thread_policy.h>
#endif
#ifdef MOZ_CANARY
# include <unistd.h>
# include <execinfo.h>
@ -370,6 +375,16 @@ SetThreadAffinity(unsigned int cpu)
sched_setaffinity(0, sizeof(cpus), &cpus);
// Don't assert sched_setaffinity's return value because it intermittently (?)
// fails with EINVAL on Linux x64 try runs.
#elif defined(XP_MACOSX)
// OS X does not provide APIs to pin threads to specific processors, but you
// can tag threads as belonging to the same "affinity set" and the OS will try
// to run them on the same processor. To run threads on different processors,
// tag them as belonging to different affinity sets. Tag 0, the default, means
// "no affinity" so let's pretend each CPU has its own tag `cpu+1`.
thread_affinity_policy_data_t policy;
policy.affinity_tag = cpu + 1;
MOZ_ALWAYS_TRUE(thread_policy_set(mach_thread_self(), THREAD_AFFINITY_POLICY,
&policy.affinity_tag, 1) == KERN_SUCCESS);
#elif defined(XP_WIN)
MOZ_ALWAYS_TRUE(SetThreadIdealProcessor(GetCurrentThread(), cpu) != -1);
#endif