diff options
Diffstat (limited to 'xpcom/threads/nsThread.cpp')
| -rw-r--r-- | xpcom/threads/nsThread.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/xpcom/threads/nsThread.cpp b/xpcom/threads/nsThread.cpp index ed67fa6594..71e71822fa 100644 --- a/xpcom/threads/nsThread.cpp +++ b/xpcom/threads/nsThread.cpp @@ -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 |