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| author | David NewHamlet <david@newhamlet.com> | 2017-03-11 09:13:20 +1300 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2017-03-10 22:06:24 +0000 |
| commit | e19f184b8f61529980c24973d5522dc67e3d8525 (patch) | |
| tree | 253572abfe37550316bd052889ffca6644705e07 /src/runtime/defs_freebsd.go | |
| parent | 135ce43c8731506d541329a1dfea2c737c6dd0b1 (diff) | |
| download | go-e19f184b8f61529980c24973d5522dc67e3d8525.tar.gz go-e19f184b8f61529980c24973d5522dc67e3d8525.zip | |
runtime: use cpuset_getaffinity for runtime.NumCPU() on FreeBSD
In FreeBSD when run Go proc under a given sub-list of
processors(e.g. 'cpuset -l 0 ./a.out' in multi-core system),
runtime.NumCPU() still return all physical CPUs from sysctl
hw.ncpu instead of account from sub-list.
Fix by use syscall cpuset_getaffinity to account the number of sub-list.
Fixes #15206
Change-Id: If87c4b620e870486efa100685db5debbf1210a5b
Reviewed-on: https://go-review.googlesource.com/29341
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/defs_freebsd.go')
| -rw-r--r-- | src/runtime/defs_freebsd.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/runtime/defs_freebsd.go b/src/runtime/defs_freebsd.go index 73422b7af2..0a11d09db2 100644 --- a/src/runtime/defs_freebsd.go +++ b/src/runtime/defs_freebsd.go @@ -28,9 +28,20 @@ package runtime #include <sys/thr.h> #include <sys/_sigset.h> #include <sys/unistd.h> +#include <sys/sysctl.h> +#include <sys/cpuset.h> +#include <sys/param.h> */ import "C" +// Local consts. +const ( + _NBBY = C.NBBY // Number of bits in a byte. + _CTL_MAXNAME = C.CTL_MAXNAME // Largest number of components supported. + _CPU_LEVEL_WHICH = C.CPU_LEVEL_WHICH // Actual mask/id for which. + _CPU_WHICH_PID = C.CPU_WHICH_PID // Specifies a process id. +) + const ( EINTR = C.EINTR EFAULT = C.EFAULT |