linux/kernel/time
john stultz b2d9323d13 Use num_possible_cpus() instead of NR_CPUS for timer distribution
To avoid lock contention, we distribute the sched_timer calls across the
cpus so they do not trigger at the same instant.  However, I used NR_CPUS,
which can cause needless grouping on small smp systems depending on your
kernel config.  This patch converts to using num_possible_cpus() so we
spread it as evenly as possible on every machine.

Briefly tested w/ NR_CPUS=255 and verified reduced contention.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:53 -07:00
..
clockevents.c clockevents: Allow build w/o run-tine usage for migration purposes 2007-10-12 23:04:05 +02:00
clocksource.c clocksource: fix lock order in the resume path 2007-05-15 08:54:00 -07:00
jiffies.c [PATCH] fix jiffies clocksource inittime 2007-04-04 21:12:47 -07:00
Kconfig clockevents: Allow build w/o run-tine usage for migration purposes 2007-10-12 23:04:05 +02:00
Makefile clockevents: Allow build w/o run-tine usage for migration purposes 2007-10-12 23:04:05 +02:00
ntp.c Fix "no_sync_cmos_clock" logic inversion in kernel/time/ntp.c 2007-09-11 17:21:27 -07:00
tick-broadcast.c time: simplify smp_call_function_single() call sequence 2007-10-17 08:42:48 -07:00
tick-common.c clockevents: introduce force broadcast notifier 2007-10-14 22:57:45 +02:00
tick-internal.h highres/dyntick: prevent xtime lock contention 2007-05-08 11:15:10 -07:00
tick-oneshot.c highres: improve debug output 2007-07-21 17:49:15 -07:00
tick-sched.c Use num_possible_cpus() instead of NR_CPUS for timer distribution 2007-10-17 08:42:53 -07:00
timekeeping.c kernel/time/timekeeping.c: cleanups 2007-10-17 08:42:53 -07:00
timer_list.c Fix leaks on /proc/{*/sched,sched_debug,timer_list,timer_stats} 2007-07-31 15:39:40 -07:00
timer_stats.c Fix timer_stats printout of events/sec 2007-10-07 16:28:43 -07:00