On Tue, Aug 20, 2013 at 02:14:26PM +0300, Sergey Senozhatsky wrote: > Hello, > 3.11.0-rc6-next-20130820 > > at some point an overflowed cpu time is reported in /proc/PID/stat > > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 0 406 0 0 20 0 1 0 10 0 0 > 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 0 406 0 0 20 0 1 0 10 0 0 > 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 0 407 0 0 20 0 1 0 10 0 0 > 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 0 407 0 0 20 0 1 0 10 0 0 > 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 1844674407370 477 0 0 20 0 1 0 > 10 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 > 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > ^^^^^^^^^ > cat /proc/10/stat > 10 (rcu_preempt) S 2 0 0 0 -1 2129984 0 0 0 0 1844674407370 597 0 0 20 0 1 0 > 10 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 > 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > (seems there are several more -1UL in output) > > > oddly enough, I see this happening only for RCU > > ps aux | grep rcu > root 8 0.0 0.0 0 0 ? S 12:42 0:00 [rcuc/0] > root 9 0.0 0.0 0 0 ? S 12:42 0:00 [rcub/0] > root 10 62422329 0.0 0 0 ? R 12:42 21114581:37 > [rcu_preempt] > root 11 0.1 0.0 0 0 ? S 12:42 0:02 [rcuop/0] > root 12 62422329 0.0 0 0 ? S 12:42 21114581:35 > [rcuop/1] > > -ss
Hello, Please upload your config. I'm adding Stanislaw in Cc in case it relates to cputime scaling. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
