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| author | Lin Ming <ming.m.lin@intel.com> | 2011-03-03 10:34:50 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-03-05 07:12:16 +0100 |
| commit | 6909262429b70a162e9e7053672cfd8024c9275d (patch) | |
| tree | ee701491a7cd2a1fb685f18b379a6cd4d450b395 /arch/x86/include/asm/smp.h | |
| parent | e994d7d23a0bae34cd28834e85522ed4e782faf7 (diff) | |
| download | linux-0-day-6909262429b70a162e9e7053672cfd8024c9275d.tar.gz linux-0-day-6909262429b70a162e9e7053672cfd8024c9275d.tar.xz | |
perf: Avoid the percore allocations if the CPU is not HT capable
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1299119690-13991-5-git-send-email-ming.m.lin@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/smp.h')
| -rw-r--r-- | arch/x86/include/asm/smp.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h index 1f46951367763..c1bbfa89a0e22 100644 --- a/arch/x86/include/asm/smp.h +++ b/arch/x86/include/asm/smp.h @@ -17,10 +17,20 @@ #endif #include <asm/thread_info.h> #include <asm/cpumask.h> +#include <asm/cpufeature.h> extern int smp_num_siblings; extern unsigned int num_processors; +static inline bool cpu_has_ht_siblings(void) +{ + bool has_siblings = false; +#ifdef CONFIG_SMP + has_siblings = cpu_has_ht && smp_num_siblings > 1; +#endif + return has_siblings; +} + DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); DECLARE_PER_CPU(u16, cpu_llc_id); |