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 <[email protected]> --- 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) -- 2.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
