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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-05-19 09:09:00 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-05-19 09:09:00 -0700 |
| commit | 7c08d791ee4fabf96d96b66dec803602e621057c (patch) | |
| tree | fdc67fe76da8482d407594c70260a64c27e31cb7 /sysdeps/x86/cpu-features.h | |
| parent | eb2c88c7c83901737db5c4de7dc4470c5681b2cb (diff) | |
| download | glibc-7c08d791ee4fabf96d96b66dec803602e621057c.tar.gz glibc-7c08d791ee4fabf96d96b66dec803602e621057c.tar.xz glibc-7c08d791ee4fabf96d96b66dec803602e621057c.zip | |
Check the HTT bit before counting logical threads
Skip counting logical threads for Intel processors if the HTT bit is 0 which indicates there is only a single logical processor. * sysdeps/x86/cacheinfo.c (init_cacheinfo): Skip counting logical threads if the HTT bit is 0. * sysdeps/x86/cpu-features.h (bit_cpu_HTT): New. (index_cpu_HTT): Likewise. (reg_HTT): Likewise.
Diffstat (limited to 'sysdeps/x86/cpu-features.h')
| -rw-r--r-- | sysdeps/x86/cpu-features.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h index 9529d61ff5..2bd93713a1 100644 --- a/sysdeps/x86/cpu-features.h +++ b/sysdeps/x86/cpu-features.h @@ -51,6 +51,7 @@ #define bit_cpu_POPCOUNT (1 << 23) #define bit_cpu_FMA (1 << 12) #define bit_cpu_FMA4 (1 << 16) +#define bit_cpu_HTT (1 << 28) /* COMMON_CPUID_INDEX_7. */ #define bit_cpu_ERMS (1 << 9) @@ -235,6 +236,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define index_cpu_FMA4 COMMON_CPUID_INDEX_80000001 # define index_cpu_POPCOUNT COMMON_CPUID_INDEX_1 # define index_cpu_OSXSAVE COMMON_CPUID_INDEX_1 +# define index_cpu_HTT COMMON_CPUID_INDEX_1 # define reg_CX8 edx # define reg_CMOV edx @@ -252,6 +254,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define reg_FMA4 ecx # define reg_POPCOUNT ecx # define reg_OSXSAVE ecx +# define reg_HTT edx # define index_arch_Fast_Rep_String FEATURE_INDEX_1 # define index_arch_Fast_Copy_Backward FEATURE_INDEX_1 |