power: Add option to log time spent in suspend
authorColin Cross <ccross@android.com>
Wed, 22 May 2013 05:32:14 +0000 (22:32 -0700)
committerJohn Stultz <john.stultz@linaro.org>
Wed, 29 May 2013 19:57:34 +0000 (12:57 -0700)
commit5c83545f24ab3dd67e0ae0e2b795fea750f08c34
tree72ad0d3d33302a9100c17855bc08bf936cbdd081
parent11ffa9d6065f344a9bd769a2452f26f2f671e5f8
power: Add option to log time spent in suspend

Below is a patch from android kernel that maintains a histogram of
suspend times. Please review and provide feedback.

Statistices on the time spent in suspend are kept in
/sys/kernel/debug/sleep_time.

Cc: Android Kernel Team <kernel-team@android.com>
Cc: Colin Cross <ccross@android.com>
Cc: Todd Poynor <toddpoynor@google.com>
Cc: San Mehat <san@google.com>
Cc: Benoit Goby <benoit@android.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
[zoran.markovic@linaro.org: Re-formatted suspend time table to better
fit expected values. Moved accounting of suspend time into timekeeping
core. Removed CONFIG_SUSPEND_TIME flag and made the feature conditional
on CONFIG_DEBUG_FS. Changed the file name to sleep_time to better fit
terminology in timekeeping core. Changed seq_printf to seq_puts. Tweaked
commit message]
Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
kernel/time/Makefile
kernel/time/timekeeping.c
kernel/time/timekeeping_debug.c [new file with mode: 0644]
kernel/time/timekeeping_internal.h [new file with mode: 0644]