From c882e0feb937af4e5b991cbd1c81536f37053e86 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Robert=20Sch=C3=B6ne?= Date: Mon, 14 Jun 2010 13:37:20 +0200 Subject: [PATCH] x86, perf: Add power_end event to process_*.c cpu_idle routine Systems using the idle thread from process_32.c and process_64.c do not generate power_end events which could be traced using perf. This patch adds the event generation for such systems. Signed-off-by: Robert Schoene Acked-by: Arjan van de Ven Cc: Peter Zijlstra LKML-Reference: <1276515440.5441.45.camel@localhost> Signed-off-by: Ingo Molnar --- arch/x86/kernel/process_32.c | 4 ++++ arch/x86/kernel/process_64.c | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 8d128783af47..96586c3cbbbf 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -57,6 +57,8 @@ #include #include +#include + asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); /* @@ -111,6 +113,8 @@ void cpu_idle(void) stop_critical_timings(); pm_idle(); start_critical_timings(); + + trace_power_end(smp_processor_id()); } tick_nohz_restart_sched_tick(); preempt_enable_no_resched(); diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 3c2422a99f1f..3d9ea531ddd1 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -51,6 +51,8 @@ #include #include +#include + asmlinkage extern void ret_from_fork(void); DEFINE_PER_CPU(unsigned long, old_rsp); @@ -138,6 +140,9 @@ void cpu_idle(void) stop_critical_timings(); pm_idle(); start_critical_timings(); + + trace_power_end(smp_processor_id()); + /* In many cases the interrupt that ended idle has already called exit_idle. But some idle loops can be woken up without interrupt. */ -- GitLab