[PATCH v2 RESEND] arm: add cpu_idle tracepoints to arch_cpu_idle
From: Jisheng Zhang <hidden>
Date: 2015-11-16 10:22:58
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Currently, if cpuidle is disabled or not supported, powertop reports zero wakeups and zero events. This is due to the cpu_idle tracepoints are missing. This patch is to make cpu_idle tracepoints always available even if cpuidle is disabled or not supported. Signed-off-by: Jisheng Zhang <redacted> --- Since v1: - ignore arm_pm_idle. arch/arm/kernel/process.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 7a7c4ce..83d2dc5 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c@@ -28,6 +28,7 @@ #include <linux/random.h> #include <linux/hw_breakpoint.h> #include <linux/leds.h> +#include <trace/events/power.h> #include <asm/processor.h> #include <asm/thread_notify.h>
@@ -66,11 +67,15 @@ void (*arm_pm_idle)(void); void arch_cpu_idle(void) { - if (arm_pm_idle) + if (arm_pm_idle) { arm_pm_idle(); - else + local_irq_enable(); + } else { + trace_cpu_idle_rcuidle(1, smp_processor_id()); cpu_do_idle(); - local_irq_enable(); + local_irq_enable(); + trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); + } } void arch_cpu_idle_prepare(void)
--
2.6.2