Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1299848
| From | Mike Galbraith <umgwanakikbuti@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [ANNOUNCE] 4.4-rc6-rt1 |
| Date | 2016-01-01 08:20 +0100 |
| Message-ID | <qM2ae-76b-7@gated-at.bofh.it> (permalink) |
| References | <qJ0xY-74S-5@gated-at.bofh.it> <qLOgV-6Ka-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, 2015-12-31 at 10:24 -0600, Clark Williams wrote:
> I pulled this update and tried it on my laptop (i7 quad-core with HT)
> and an Atom testbox. I'm seeing a change in the cpu utilization of
> ksoftirqd between 4.1.15-rt17 and 4.4-rc2-rt1, where the per-cpu
> ksoftirqd threads are running at between 25-40% utilization:
>
> top - 10:15:57 up 13:46, 2 users, load average: 9.44, 9.30, 8.93
> Tasks: 188 total, 2 running, 186 sleeping, 0 stopped, 0 zombie
> %Cpu(s): 4.7 us, 53.6 sy, 0.0 ni, 37.4 id, 0.1 wa, 0.0 hi, 4.2 si, 0.0 st
> KiB Mem : 4046064 total, 480548 free, 179528 used, 3385988 buff/cache
> KiB Swap: 5177340 total, 5169908 free, 7432 used. 3785624 avail Mem
>
> 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.
swapper 0 [003] 392.708321: timer:hrtimer_cancel: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708321: timer:hrtimer_start: hrtimer=0xffff88041ecce720 function=tick_sched_timer/0x0 expires=4294990471 softexpires=4294990471
swapper 0 [003] 392.708323: timer:hrtimer_cancel: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708324: timer:hrtimer_expire_entry: hrtimer=0xffff88041ecce720 now=392697118535 function=tick_sched_timer/0x0
swapper 0 [003] 392.708325: timer:hrtimer_expire_exit: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708326: timer:hrtimer_start: hrtimer=0xffff88041ecce720 function=tick_sched_timer/0x0 expires=392700750000 softexpires=392700750000
swapper 0 [003] 392.708328: timer:tick_stop: success=yes msg=
swapper 0 [003] 392.708329: timer:hrtimer_cancel: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708329: timer:hrtimer_start: hrtimer=0xffff88041ecce720 function=tick_sched_timer/0x0 expires=4294990471 softexpires=4294990471
swapper 0 [003] 392.708331: timer:hrtimer_cancel: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708332: timer:hrtimer_expire_entry: hrtimer=0xffff88041ecce720 now=392697126313 function=tick_sched_timer/0x0
swapper 0 [003] 392.708333: timer:hrtimer_expire_exit: hrtimer=0xffff88041ecce720
swapper 0 [003] 392.708334: timer:hrtimer_start: hrtimer=0xffff88041ecce720 function=tick_sched_timer/0x0 expires=392700750000 softexpires=392700750000
swapper 0 [003] 392.708336: timer:tick_stop: success=yes msg=
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[ANNOUNCE] 4.4-rc6-rt1 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2015-12-24 00:00 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-01 08:20 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Thomas Gleixner <tglx@linutronix.de> - 2016-01-01 10:20 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-01 10:50 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-13 19:00 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Grygorii Strashko <grygorii.strashko@ti.com> - 2016-01-13 19:40 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-14 16:00 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-14 10:40 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-14 15:20 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-14 15:40 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Thomas Gleixner <tglx@linutronix.de> - 2016-01-14 15:40 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-14 16:00 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Thomas Gleixner <tglx@linutronix.de> - 2016-01-14 16:10 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-01-14 17:10 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Tim Sander <tim@krieglstein.org> - 2016-01-07 13:20 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-13 14:50 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 (arm64) "Jaggi, Manish" <Manish.Jaggi@caviumnetworks.com> - 2016-01-13 12:50 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 (arm64) Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-13 14:50 +0100
Re: [ANNOUNCE] 4.4-rc6-rt1 (arm64) "Jaggi, Manish" <Manish.Jaggi@caviumnetworks.com> - 2016-01-14 13:00 +0100
csiph-web