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| author | Venkatesh Pallipadi <venki@google.com> | 2010-10-04 17:03:20 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-18 20:52:25 +0200 |
| commit | e82b8e4ea4f3dffe6e7939f90e78da675fcc450e (patch) | |
| tree | 116e54691f87d2cb0f2f5df36d1e114624c225d0 /arch/x86/Kconfig | |
| parent | b52bfee445d315549d41eacf2fa7c156e7d153d5 (diff) | |
| download | linux-stable-e82b8e4ea4f3dffe6e7939f90e78da675fcc450e.tar.gz linux-stable-e82b8e4ea4f3dffe6e7939f90e78da675fcc450e.tar.bz2 linux-stable-e82b8e4ea4f3dffe6e7939f90e78da675fcc450e.zip | |
x86: Add IRQ_TIME_ACCOUNTING
This patch adds IRQ_TIME_ACCOUNTING option on x86 and runtime enables it
when TSC is enabled.
This change just enables fine grained irq time accounting, isn't used yet.
Following patches use it for different purposes.
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286237003-12406-6-git-send-email-venki@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index cea0cd9a316f..f4c70c246ffe 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -795,6 +795,17 @@ config SCHED_MC making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. +config IRQ_TIME_ACCOUNTING + bool "Fine granularity task level IRQ time accounting" + default n + ---help--- + Select this option to enable fine granularity task irq time + accounting. This is done by reading a timestamp on each + transitions between softirq and hardirq state, so there can be a + small performance impact. + + If in doubt, say N here. + source "kernel/Kconfig.preempt" config X86_UP_APIC |