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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-02 15:49:18 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 18:51:27 +0400 |
| commit | 47fe38fcff0517e67d395c039d2e26d2de688a60 (patch) | |
| tree | ada38f4e1aa644354b9de4c2cb128719e9e64a9e /arch/x86/kernel/cpu/Makefile | |
| parent | 5cbc19a983141729d716be17197028434127b376 (diff) | |
| download | linux-47fe38fcff0517e67d395c039d2e26d2de688a60.tar.xz | |
x86: sched: Provide arch implementations using aperf/mperf
APERF/MPERF support for cpu_power.
APERF/MPERF is arch defined to be a relative scale of work capacity
per logical cpu, this is assumed to include SMT and Turbo mode.
APERF/MPERF are specified to both reset to 0 when either counter
wraps, which is highly inconvenient, since that'll give a blimp
when that happens. The manual specifies writing 0 to the counters
after each read, but that's 1) too expensive, and 2) destroys the
possibility of sharing these counters with other users, so we live
with the blimp - the other existing user does too.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/Makefile')
| -rw-r--r-- | arch/x86/kernel/cpu/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index c1f253dac155..8dd30638fe44 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -13,7 +13,7 @@ CFLAGS_common.o := $(nostackp) obj-y := intel_cacheinfo.o addon_cpuid_features.o obj-y += proc.o capflags.o powerflags.o common.o -obj-y += vmware.o hypervisor.o +obj-y += vmware.o hypervisor.o sched.o obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o obj-$(CONFIG_X86_64) += bugs_64.o |