linux-next/timekeeping_internal.h at 56ed2cb88c7370d5aa88c92a2a0b1cb92c0979b9 - linux-next - ClassFun

renegade-project/linux-next

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Colin Cross 5c83545f24 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>

2013-05-29 12:57:34 -07:00

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 #ifndef _TIMEKEEPING_INTERNAL_H
 #define _TIMEKEEPING_INTERNAL_H
 /*
  * timekeeping debug functions
  */
 #include <linux/time.h>
 #ifdef CONFIG_DEBUG_FS
 extern void tk_debug_account_sleep_time(struct timespec *t);
 #else
 #define tk_debug_account_sleep_time(x)
 #endif
 #endif /* _TIMEKEEPING_INTERNAL_H */