Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1226171

[PATCH] arm: add cpu_idle tracepoints to arch_cpu_idle

Show all headers | View raw

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 <jszhang@marvell.com>
---
 arch/arm/kernel/process.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index f192a2a..aa78e09 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 +67,13 @@ void (*arm_pm_idle)(void);
 
 void arch_cpu_idle(void)
 {
+	trace_cpu_idle_rcuidle(1, smp_processor_id());
 	if (arm_pm_idle)
 		arm_pm_idle();
 	else
 		cpu_do_idle();
 	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 majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] arm: add cpu_idle tracepoints to arch_cpu_idle Jisheng Zhang <jszhang@marvell.com> - 2015-09-16 16:50 +0200
  Re: [PATCH] arm: add cpu_idle tracepoints to arch_cpu_idle Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-16 18:30 +0200
    Re: [PATCH] arm: add cpu_idle tracepoints to arch_cpu_idle Steven Rostedt <rostedt@goodmis.org> - 2015-09-16 18:50 +0200
      Re: [PATCH] arm: add cpu_idle tracepoints to arch_cpu_idle Steven Rostedt <rostedt@goodmis.org> - 2015-09-16 19:10 +0200

csiph-web