diff options
| author | Antti P Miettinen <amiettinen@nvidia.com> | 2012-08-14 13:14:00 +0300 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-08-15 17:01:19 -0700 |
| commit | 51efb6b201d3a0939e684ef2b530fe485da32531 (patch) | |
| tree | e7bedf85301aea84e69802d9db4a8c0acdf287c1 | |
| parent | a8047fabd0ae8fc767ce6f276d8bfb53fc838d05 (diff) | |
ARM: tegra: power: Trace LP2 entry and exit
Add traces for measuring LP2 entry/exit times.
Bug 960304
Change-Id: I20bb0f8d55a7ed6f7e88e10d924871a3d09f2507
Signed-off-by: Antti P Miettinen <amiettinen@nvidia.com>
Reviewed-on: http://git-master/r/123313
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c index 47d5996e5961..9d36d0fac5d8 100644 --- a/arch/arm/mach-tegra/cpuidle.c +++ b/arch/arm/mach-tegra/cpuidle.c @@ -45,6 +45,7 @@ #include "cpuidle.h" #include "pm.h" #include "sleep.h" +#include "timer.h" int tegra_lp2_exit_latency; static int tegra_lp2_power_off_time; @@ -117,12 +118,20 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev, return tegra_idle_enter_lp3(dev, state); } + trace_printk("LP2 entry at %lu us\n", + (unsigned long)readl(IO_ADDRESS(TEGRA_TMR1_BASE) + + TIMERUS_CNTR_1US)); + local_irq_disable(); enter = ktime_get(); tegra_cpu_idle_stats_lp2_ready(dev->cpu); tegra_idle_lp2(dev, state); + trace_printk("LP2 exit at %lu us\n", + (unsigned long)readl(IO_ADDRESS(TEGRA_TMR1_BASE) + + TIMERUS_CNTR_1US)); + exit = ktime_sub(ktime_get(), enter); us = ktime_to_us(exit); |