From: Sergey Senozhatsky <sergey.senozhatsky at gmail.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] (BUG) powertop-1.13 fails to kernel-3.10.7
Date: Tue, 03 Sep 2013 08:58:50 +0300 [thread overview]
Message-ID: <20130903055850.GA2464@swordfish> (raw)
In-Reply-To: CAAEzAp-9iZSPDkntiguA9mez+xk+n0ZLbDV-N79P0s8Lx7eUgg@mail.gmail.com
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On (08/24/13 09:35), Dennis Jenkins wrote:
> Hello,
>
> �� I recently updated my Gentoo linux kernel from 3.8.18 to 3.10.7.�
> powertop now hangs while starting up.� "strace" shows that powertop is
> reading the contents of "/proc/timer_list" over and over (but with no�
> "seek" call, which is weird to me).
Hello,
sorry for long response. this one really looks like a kernel bug
fixed by 84a78a6504f5c5394a8e558702e5b54131f01d14 upstream (3.11)
-ss
> ostara ~ # powertop --version
> powertop version 1.13
>
> ostara ~ # uname -r
> 3.10.7-gentoo
>
> ostara ~ # zgrep TIMER /proc/config.gz
> CONFIG_HIGH_RES_TIMERS=y
> CONFIG_TIMERFD=y
> CONFIG_OPROFILE_NMI_TIMER=y
> CONFIG_HPET_TIMER=y
> # CONFIG_X86_PM_TIMER is not set
> CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m
> # CONFIG_HW_RANDOM_TIMERIOMEM is not set
> # CONFIG_HANGCHECK_TIMER is not set
> # CONFIG_PPS_CLIENT_KTIMER is not set
> CONFIG_SND_TIMER=m
> # CONFIG_SND_HRTIMER is not set
> CONFIG_TIMER_STATS=y
>
> ostara ~ # wc /proc/timer_list
> 387 1569 16282 /proc/timer_list
>
> ostara ~ # strace -e\!read powertop
> (tailing...)
> open("/proc/interrupts", O_RDONLY)����� = 3
> fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> 0x7fcfdd7c3000
> open("/proc/timer_list", O_RDONLY)����� = 4
> fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> 0x7fcfdd7c2000
> ^CProcess 22238 detached
>
> Now run "strace" again, but without the "-e\!read" and watch it read fd #4
> over and over and over again.
>
> If you need any additional info, please let me know.
> _______________________________________________
> PowerTop mailing list
> PowerTop(a)lists.01.org
> https://lists.01.org/mailman/listinfo/powertop
next reply other threads:[~2013-09-03 5:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-03 5:58 Sergey Senozhatsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2013-08-24 14:35 [Powertop] (BUG) powertop-1.13 fails to kernel-3.10.7 Dennis Jenkins
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