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| author | Jason Low <jason.low2@hp.com> | 2015-10-14 12:07:53 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-10-15 11:23:41 +0200 |
| commit | 7c177d994eb9637302b79e80d331f48dfbe26368 (patch) | |
| tree | c5160894bfb1ea109d73e45e2d3dc066c69cd24b /kernel/fork.c | |
| parent | 6035519fcf5aa17084b41790cdc584d881d82c03 (diff) | |
| download | linux-7c177d994eb9637302b79e80d331f48dfbe26368.tar.bz2 | |
posix_cpu_timer: Optimize fastpath_timer_check()
In fastpath_timer_check(), the task_cputime() function is always
called to compute the utime and stime values. However, this is not
necessary if there are no per-thread timers to check for. This patch
modifies the code such that we compute the task_cputime values only
when there are per-thread timers set.
Signed-off-by: Jason Low <jason.low2@hp.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: George Spelvin <linux@horizon.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: hideaki.kimura@hpe.com
Cc: terry.rudd@hpe.com
Cc: scott.norton@hpe.com
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1444849677-29330-2-git-send-email-jason.low2@hp.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions