Revision 3a53396b0381ec9d5180fd8fe7a681c8ce95fd9a authored by ShuoX Liu on 28 March 2012, 22:19:11 UTC, committed by Len Brown on 30 March 2012, 05:52:58 UTC
Some C states of new CPU might be not good. One reason is BIOS might configure them incorrectly. To help developers root cause it quickly, the patch adds a new sysfs entry, so developers could disable specific C state manually. In addition, C state might have much impact on performance tuning, as it takes much time to enter/exit C states, which might delay interrupt processing. With the new debug option, developers could check if a deep C state could impact performance and how much impact it could cause. Also add this option in Documentation/cpuidle/sysfs.txt. [akpm@linux-foundation.org: check kstrtol return value] Signed-off-by: ShuoX Liu <shuox.liu@intel.com> Reviewed-by: Yanmin Zhang <yanmin_zhang@intel.com> Reviewed-and-Tested-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 813 bytes |
| Makefile | -rw-r--r-- | 439 bytes |
| alarmtimer.c | -rw-r--r-- | 19.9 KB |
| clockevents.c | -rw-r--r-- | 11.3 KB |
| clocksource.c | -rw-r--r-- | 26.4 KB |
| jiffies.c | -rw-r--r-- | 3.0 KB |
| ntp.c | -rw-r--r-- | 24.1 KB |
| posix-clock.c | -rw-r--r-- | 8.4 KB |
| tick-broadcast.c | -rw-r--r-- | 15.5 KB |
| tick-common.c | -rw-r--r-- | 9.5 KB |
| tick-internal.h | -rw-r--r-- | 4.6 KB |
| tick-oneshot.c | -rw-r--r-- | 2.8 KB |
| tick-sched.c | -rw-r--r-- | 22.9 KB |
| timecompare.c | -rw-r--r-- | 4.8 KB |
| timeconv.c | -rw-r--r-- | 3.5 KB |
| timekeeping.c | -rw-r--r-- | 32.8 KB |
| timer_list.c | -rw-r--r-- | 7.5 KB |
| timer_stats.c | -rw-r--r-- | 9.9 KB |
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