From: Mikael Pettersson <mikpe@it.uu.se>
To: Mikael Pettersson <mikpe@it.uu.se>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Kernel Testers List <kernel-testers@vger.kernel.org>,
Maciej Rutecki <maciej.rutecki@gmail.com>,
Florian Mickler <florian@mickler.org>,
Venkatesh Pallipadi <venki@google.com>
Subject: Re: [Bug #23902] [BUG] 2.6.37-rc3 massive interactivity regression on ARM
Date: Sat, 4 Dec 2010 20:51:31 +0100 [thread overview]
Message-ID: <19706.39875.954626.75344@pilspetsen.it.uu.se> (raw)
In-Reply-To: <19706.13300.115878.641839@pilspetsen.it.uu.se>
Mikael Pettersson writes:
> Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a summary report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.36. Please verify if it still should be listed and let the tracking team
> > know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=23902
> > Subject : [BUG] 2.6.37-rc3 massive interactivity regression on ARM
> > Submitter : Mikael Pettersson <mikpe@it.uu.se>
> > Date : 2010-11-27 15:16 (6 days old)
> > Message-ID : <19697.8378.717761.236202@pilspetsen.it.uu.se>
> > References : http://marc.info/?l=linux-kernel&m=129087098911837&w=2
>
> The bug is still present in 2.6.37-rc4. I'm currently trying to bisect it.
git bisect identified
[305e6835e05513406fa12820e40e4a8ecb63743c] sched: Do not account irq time to current task
as the cause of this regression. Reverting it from 2.6.37-rc4 (requires some
hackery due to subsequent changes in the same area) restores sane behaviour.
(Author of original patch cc:d.)
The original patch submission talks about irq-heavy scenarios. My case is the
exact opposite: UP, !PREEMPT, NO_HZ, very low irq rate, essentially 100% CPU
bound in userspace but expected to schedule quickly when needed (e.g. running
top or ps or just hitting CR in one shell while another runs a compile job).
/Mikael
WARNING: multiple messages have this Message-ID (diff)
From: Mikael Pettersson <mikpe-1zs4UD6AkMk@public.gmane.org>
To: Mikael Pettersson <mikpe-1zs4UD6AkMk@public.gmane.org>
Cc: "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Kernel Testers List
<kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Maciej Rutecki
<maciej.rutecki-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Florian Mickler <florian-sVu6HhrpSfRAfugRpC6u6w@public.gmane.org>,
Venkatesh Pallipadi
<venki-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: [Bug #23902] [BUG] 2.6.37-rc3 massive interactivity regression on ARM
Date: Sat, 4 Dec 2010 20:51:31 +0100 [thread overview]
Message-ID: <19706.39875.954626.75344@pilspetsen.it.uu.se> (raw)
In-Reply-To: <19706.13300.115878.641839-tgku4HJDRZih8lFjZTKsyTAV6s6igYVG@public.gmane.org>
Mikael Pettersson writes:
> Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a summary report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.36. Please verify if it still should be listed and let the tracking team
> > know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=23902
> > Subject : [BUG] 2.6.37-rc3 massive interactivity regression on ARM
> > Submitter : Mikael Pettersson <mikpe-1zs4UD6AkMk@public.gmane.org>
> > Date : 2010-11-27 15:16 (6 days old)
> > Message-ID : <19697.8378.717761.236202-tgku4HJDRZih8lFjZTKsyTAV6s6igYVG@public.gmane.org>
> > References : http://marc.info/?l=linux-kernel&m=129087098911837&w=2
>
> The bug is still present in 2.6.37-rc4. I'm currently trying to bisect it.
git bisect identified
[305e6835e05513406fa12820e40e4a8ecb63743c] sched: Do not account irq time to current task
as the cause of this regression. Reverting it from 2.6.37-rc4 (requires some
hackery due to subsequent changes in the same area) restores sane behaviour.
(Author of original patch cc:d.)
The original patch submission talks about irq-heavy scenarios. My case is the
exact opposite: UP, !PREEMPT, NO_HZ, very low irq rate, essentially 100% CPU
bound in userspace but expected to schedule quickly when needed (e.g. running
top or ps or just hitting CR in one shell while another runs a compile job).
/Mikael
next prev parent reply other threads:[~2010-12-04 19:51 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 23:35 2.6.37-rc4-git1: Reported regressions from 2.6.36 Rafael J. Wysocki
2010-12-02 23:35 ` [Bug #22472] vga_switcheroo fails to switch from intel to ati Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22642] 2.6.37-rc1: Disk takes 10 seconds to resume - MacBook2,1 Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22542] [2.6.37-rc1] drm:i195 errors Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22532] 2.6.37-rc1: BUG: scheduling while atomic (kvm_init) Rafael J. Wysocki
2010-12-03 17:19 ` Thomas Meyer
2010-12-03 21:26 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22572] Linux 2.6.37-rc1 (acpi_video) Rafael J. Wysocki
2010-12-02 23:41 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22662] divide error in select_task_rq_fair() Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22562] Regression in 2.6.37-rc1 - logs spammed with "unable to enumerate USB port" - bisected to commit 3df7169e Rafael J. Wysocki
2010-12-03 2:44 ` Larry Finger
2010-12-03 2:44 ` Larry Finger
2010-12-03 21:28 ` Rafael J. Wysocki
2010-12-03 21:28 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22812] kernel oops on 2.6.37-rc1 Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22882] (2.6.37-rc1) amd64-agp module crashed on second load Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22912] spi_lm70llp module crash on unload (2.6.37-rc1) Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22672] Regression in 2.6.37-rc1 for Intel 945 Graphics Adapter - bisected to commit e9e331a Rafael J. Wysocki
2010-12-03 1:11 ` Larry Finger
2010-12-03 1:11 ` Larry Finger
2010-12-03 21:29 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23012] ftdi_sio /dev/ttyUSB error: "Resource Temporarily Unavailable" Rafael J. Wysocki
2010-12-03 15:20 ` Alan Stern
2010-12-03 15:20 ` Alan Stern
2010-12-03 21:30 ` Rafael J. Wysocki
2010-12-03 21:30 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22932] [REGRESSION] [2.6.37-rc1] Fan noise after suspend to ram/disk Rafael J. Wysocki
2010-12-02 23:41 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #22942] [2.6.37-rc1, OOM] virtblk: OOM in do_virtblk_request() Rafael J. Wysocki
2010-12-02 23:41 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23102] [bisected] i915 regression in post 2.6.36 kernels Rafael J. Wysocki
2010-12-03 0:20 ` Johannes Hirte
2010-12-02 23:41 ` [Bug #23432] resume from suspend hangs on everex stepnote sa2053 Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23452] 5ada28bf76752 causes compilation error if !CONFIG_LEDS_CLASS Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23332] Boot failure on HP nx6325 Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23142] autofs4 hang in 2.6.37-rc1 Rafael J. Wysocki
2010-12-02 23:41 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23462] DVI/EDID broken with Intel i945 graphics and 2.6.37-rc2 Rafael J. Wysocki
2010-12-03 6:55 ` Tino Keitel
2010-12-03 21:31 ` Rafael J. Wysocki
2010-12-03 21:31 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23762] kernel 2.6.37-rc2 breaks i915 graphics Rafael J. Wysocki
2010-12-04 1:02 ` Chris Vine
2010-12-04 1:02 ` Chris Vine
2010-12-06 22:25 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23542] HP 2530p accelerated graphics causes spontaneous power off/on Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #23902] [BUG] 2.6.37-rc3 massive interactivity regression on ARM Rafael J. Wysocki
2010-12-04 12:28 ` Mikael Pettersson
2010-12-04 12:28 ` Mikael Pettersson
2010-12-04 19:51 ` Mikael Pettersson [this message]
2010-12-04 19:51 ` Mikael Pettersson
2010-12-06 22:28 ` Rafael J. Wysocki
2010-12-06 22:28 ` Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #24142] No more bt848 driver in 2.6.37-rc* Rafael J. Wysocki
2010-12-02 23:41 ` [Bug #24012] Commit g18733b0 hangs my LVM+raid10 system Rafael J. Wysocki
-- strict thread matches above, loose matches on Subject: below --
2010-12-19 12:28 2.6.37-rc6-git4: Reported regressions from 2.6.36 Rafael J. Wysocki
2010-12-19 12:34 ` [Bug #23902] [BUG] 2.6.37-rc3 massive interactivity regression on ARM Rafael J. Wysocki
2010-12-19 13:10 ` Mikael Pettersson
2010-12-19 13:40 ` Rafael J. Wysocki
2010-12-19 13:40 ` Rafael J. Wysocki
[not found] <96DQe4a_2tH.A.4RE.497GNB@chimera>
2010-12-29 23:07 ` Rafael J. Wysocki
2010-12-30 11:46 ` Mikael Pettersson
2010-12-30 11:46 ` Mikael Pettersson
2010-12-30 14:47 ` Rafael J. Wysocki
2010-12-30 14:47 ` Rafael J. Wysocki
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