On Wed, 2016-01-13 at 18:58 +0100, Sebastian Andrzej Siewior wrote: > * Mike Galbraith | 2016-01-01 08:19:41 [+0100]: > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM > > > TIME+ COMMAND > > > 3 root -2 0 0 0 0 S 37.3 0.0 > > > 307:52.44 ksoftirqd/0 > > > 32 root -2 0 0 0 0 S 37.3 0.0 > > > 308:08.72 ksoftirqd/2 > > > 42 root -2 0 0 0 0 R 37.3 0.0 > > > 308:32.84 ksoftirqd/3 > > > 22 root -2 0 0 0 0 S 26.9 0.0 > > > 222:29.82 ksoftirqd/1 > > > 1 root 20 0 46628 6980 4976 S 1.3 0.2 > > > 0:13.98 systemd > > > 22358 williams 20 0 159980 4552 3780 R 1.0 0.1 > > > 0:00.39 top > > > > Heh, I didn't notice immediately because I throttle nohz, am seeing > > only tiny utilization (but nohz idle isn't working). With throttle > > patch removed, box is screaming, expires=4294990471 pokes eyeball. > > This is due to NO_HZ as far as I can tell. My AMD A10 in idle mode > has > 0.7% utilisation of ksoftirqd/ with CONFIG_HZ_PERIODIC and with > CONFIG_NO_HZ_FULL it shows about 25% on all CPU threads. Thomas said the hrtimer adjustments went a little out of round. I started rummaging, but then the world woke up from the holidays, so I didn't get _to_ square one, much lest past it. Hohum. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
