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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-17 21:00:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-17 21:00:02 -0700 |
| commit | dcbf77b9e86e1726f5fbd01bb98820dac06d456e (patch) | |
| tree | 2f0b728ce70c03e1d0e3461e8a3c3d1fbe68fb90 /arch/x86/include/asm/processor.h | |
| parent | ca043a66ae48c74fa628ec92178f7a54f5b9a106 (diff) | |
| parent | 29cd8bae396583a2ee9a3340db8c5102acf9f6fd (diff) | |
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits)
sched: Fix SD_POWERSAVING_BALANCE|SD_PREFER_LOCAL vs SD_WAKE_AFFINE
sched: Stop buddies from hogging the system
sched: Add new wakeup preemption mode: WAKEUP_RUNNING
sched: Fix TASK_WAKING & loadaverage breakage
sched: Disable wakeup balancing
sched: Rename flags to wake_flags
sched: Clean up the load_idx selection in select_task_rq_fair
sched: Optimize cgroup vs wakeup a bit
sched: x86: Name old_perf in a unique way
sched: Implement a gentler fair-sleepers feature
sched: Add SD_PREFER_LOCAL
sched: Add a few SYNC hint knobs to play with
sched: Fix sync wakeups again
sched: Add WF_FORK
sched: Rename sync arguments
sched: Rename select_task_rq() argument
sched: Feature to disable APERF/MPERF cpu_power
x86: sched: Provide arch implementations using aperf/mperf
x86: Add generic aperf/mperf code
x86: Move APERF/MPERF into a X86_FEATURE
...
Fix up trivial conflict in arch/x86/include/asm/processor.h due to
nearby addition of amd_get_nb_id() declaration from the EDAC merge.
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 42a3f936dad..c3429e8b242 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -27,6 +27,7 @@ struct mm_struct; #include <linux/cpumask.h> #include <linux/cache.h> #include <linux/threads.h> +#include <linux/math64.h> #include <linux/init.h> /* @@ -1022,4 +1023,33 @@ extern int set_tsc_mode(unsigned int val); extern int amd_get_nb_id(int cpu); +struct aperfmperf { + u64 aperf, mperf; +}; + +static inline void get_aperfmperf(struct aperfmperf *am) +{ + WARN_ON_ONCE(!boot_cpu_has(X86_FEATURE_APERFMPERF)); + + rdmsrl(MSR_IA32_APERF, am->aperf); + rdmsrl(MSR_IA32_MPERF, am->mperf); +} + +#define APERFMPERF_SHIFT 10 + +static inline +unsigned long calc_aperfmperf_ratio(struct aperfmperf *old, + struct aperfmperf *new) +{ + u64 aperf = new->aperf - old->aperf; + u64 mperf = new->mperf - old->mperf; + unsigned long ratio = aperf; + + mperf >>= APERFMPERF_SHIFT; + if (mperf) + ratio = div64_u64(aperf, mperf); + + return ratio; +} + #endif /* _ASM_X86_PROCESSOR_H */ |