From: Frederic Weisbecker <fweisbec@gmail.com> To: Kevin Shanahan <kmshanah@ucwb.org.au> Cc: Avi Kivity <avi@redhat.com>, "Rafael J. Wysocki" <rjw@sisk.pl>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Kernel Testers List <kernel-testers@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>, Mike Galbraith <efault@gmx.de>, Peter Zijlstra <a.p.zijlstra@chello.nl> Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Date: Thu, 26 Mar 2009 00:48:07 +0100 [thread overview] Message-ID: <20090325234806.GO5932@nowhere> (raw) In-Reply-To: <1238024432.8669.6.camel@kulgan> On Thu, Mar 26, 2009 at 10:10:32AM +1030, Kevin Shanahan wrote: > On Tue, 2009-03-24 at 12:44 +0100, Frederic Weisbecker wrote: > > Sorry, I've been late to answer. > > As I explained in my previous mail, you trace is only > > a snapshot that happened in 10 msec. > > > > I experimented different sizes for the ring buffer but even > > a 1 second trace require 20 Mo of memory. And a so huge trace > > would be impractical. > > > > I think we should keep the trace filters we had previously. > > If you don't minde, could you please retest against latest -tip > > the following updated patch? Iadded the filters, fixed the python > > subshell and also flushed the buffer more nicely according to > > a recent feature in -tip: > > > > echo > trace > > > > instead of switching to nop. > > You will need to pull latest -tip again. > > Ok, thanks for that. I'll get a new -tip kernel ready to test tonight. > I'm not sure about the change to the python subshell though: > > > while [ "$found" != "True" ] > > do > > # Flush the previous buffer > > echo trace > $prefix/trace > > > > echo 1 > $prefix/tracing_enabled > > lat=$(ping -c 1 $addr | grep rtt | grep -Eo " [0-9]+.[0-9]+") > > echo 0 > $prefix/tracing_enabled > > > > echo $lat > > found=$(python -c "print float(str($lat).strip())") > > sleep 0.01 > > done > > kmshanah@kulgan:~$ python -c "print float(str(1.234).strip())" > 1.234 > > That's not going to evaluate to "True" at all is it? What happened to > the test against the latency threshold value? Did you mean something > like this? > > kmshanah@kulgan:~$ python -c "print float(str(1.234).strip()) > 5000" > False > kmshanah@kulgan:~$ python -c "print float(str(5001.234).strip()) > 5000" > True Sorry. I guess I was a bit asleep. It's a mistake. So you can restore how it was. Thanks. > Cheers, > Kevin. > >
WARNING: multiple messages have this Message-ID (diff)
From: Frederic Weisbecker <fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Kevin Shanahan <kmshanah-biM/RbsGxha6c6uEtOJ/EA@public.gmane.org> Cc: Avi Kivity <avi-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "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>, Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>, Mike Galbraith <efault-Mmb7MZpHnFY@public.gmane.org>, Peter Zijlstra <a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org> Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Date: Thu, 26 Mar 2009 00:48:07 +0100 [thread overview] Message-ID: <20090325234806.GO5932@nowhere> (raw) In-Reply-To: <1238024432.8669.6.camel@kulgan> On Thu, Mar 26, 2009 at 10:10:32AM +1030, Kevin Shanahan wrote: > On Tue, 2009-03-24 at 12:44 +0100, Frederic Weisbecker wrote: > > Sorry, I've been late to answer. > > As I explained in my previous mail, you trace is only > > a snapshot that happened in 10 msec. > > > > I experimented different sizes for the ring buffer but even > > a 1 second trace require 20 Mo of memory. And a so huge trace > > would be impractical. > > > > I think we should keep the trace filters we had previously. > > If you don't minde, could you please retest against latest -tip > > the following updated patch? Iadded the filters, fixed the python > > subshell and also flushed the buffer more nicely according to > > a recent feature in -tip: > > > > echo > trace > > > > instead of switching to nop. > > You will need to pull latest -tip again. > > Ok, thanks for that. I'll get a new -tip kernel ready to test tonight. > I'm not sure about the change to the python subshell though: > > > while [ "$found" != "True" ] > > do > > # Flush the previous buffer > > echo trace > $prefix/trace > > > > echo 1 > $prefix/tracing_enabled > > lat=$(ping -c 1 $addr | grep rtt | grep -Eo " [0-9]+.[0-9]+") > > echo 0 > $prefix/tracing_enabled > > > > echo $lat > > found=$(python -c "print float(str($lat).strip())") > > sleep 0.01 > > done > > kmshanah@kulgan:~$ python -c "print float(str(1.234).strip())" > 1.234 > > That's not going to evaluate to "True" at all is it? What happened to > the test against the latency threshold value? Did you mean something > like this? > > kmshanah@kulgan:~$ python -c "print float(str(1.234).strip()) > 5000" > False > kmshanah@kulgan:~$ python -c "print float(str(5001.234).strip()) > 5000" > True Sorry. I guess I was a bit asleep. It's a mistake. So you can restore how it was. Thanks. > Cheers, > Kevin. > >
next prev parent reply other threads:[~2009-03-25 23:48 UTC|newest] Thread overview: 180+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-03-14 19:11 2.6.29-rc8: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-03-14 19:11 ` Rafael J. Wysocki 2009-03-14 19:12 ` [Bug #12061] snd_hda_intel: power_save: sound cracks on powerdown Rafael J. Wysocki 2009-03-14 19:12 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12411] 2.6.28: BUG in r8169 Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12209] oldish top core dumps (in its meminfo() function) Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12208] uml is very slow on 2.6.28 host Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-21 14:44 ` ptrace performance (was: [Bug #12208] uml is very slow on 2.6.28 host) Michael Riepe 2009-03-21 14:44 ` Michael Riepe 2009-03-21 15:22 ` Ingo Molnar 2009-03-21 15:22 ` Ingo Molnar 2009-03-21 17:02 ` ptrace performance Michael Riepe 2009-03-14 19:20 ` [Bug #12337] ~100 extra wakeups reported by powertop Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12404] Oops in 2.6.28-rc9 and -rc8 -- mtrr issues / e1000e Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12421] GPF on 2.6.28 and 2.6.28-rc9-git3, e1000e and e1000 issues Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12426] TMDC Joystick no longer works in kernel 2.6.28 Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-15 9:03 ` Kevin Shanahan 2009-03-15 9:03 ` Kevin Shanahan 2009-03-15 9:18 ` Avi Kivity 2009-03-15 9:18 ` Avi Kivity 2009-03-15 9:48 ` Ingo Molnar 2009-03-15 9:48 ` Ingo Molnar 2009-03-15 9:56 ` Avi Kivity 2009-03-15 9:56 ` Avi Kivity 2009-03-15 10:03 ` Ingo Molnar 2009-03-15 10:13 ` Avi Kivity 2009-03-15 10:13 ` Avi Kivity 2009-03-16 9:49 ` Avi Kivity 2009-03-16 9:49 ` Avi Kivity 2009-03-16 12:46 ` Kevin Shanahan 2009-03-16 12:46 ` Kevin Shanahan 2009-03-16 20:07 ` Frederic Weisbecker 2009-03-16 20:07 ` Frederic Weisbecker 2009-03-16 22:55 ` Kevin Shanahan 2009-03-16 22:55 ` Kevin Shanahan 2009-03-18 0:20 ` Frederic Weisbecker 2009-03-18 0:20 ` Frederic Weisbecker 2009-03-18 1:16 ` Kevin Shanahan 2009-03-18 1:16 ` Kevin Shanahan 2009-03-18 2:24 ` Frederic Weisbecker 2009-03-18 2:24 ` Frederic Weisbecker 2009-03-18 21:24 ` Kevin Shanahan 2009-03-21 5:00 ` Kevin Shanahan 2009-03-21 5:00 ` Kevin Shanahan 2009-03-21 14:08 ` Frederic Weisbecker 2009-03-21 14:08 ` Frederic Weisbecker 2009-03-24 11:44 ` Frederic Weisbecker 2009-03-24 11:44 ` Frederic Weisbecker 2009-03-24 11:47 ` Frederic Weisbecker 2009-03-24 11:47 ` Frederic Weisbecker 2009-03-25 23:40 ` Kevin Shanahan 2009-03-25 23:48 ` Frederic Weisbecker [this message] 2009-03-25 23:48 ` Frederic Weisbecker 2009-03-26 20:22 ` Kevin Shanahan 2009-03-26 20:22 ` Kevin Shanahan 2009-03-14 19:20 ` [Bug #12500] r8169: NETDEV WATCHDOG: eth0 (r8169): transmit timed out Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12619] Regression 2.6.28 and last - boot failed Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12612] hard lockup when interrupting cdda2wav Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-17 0:53 ` FUJITA Tomonori 2009-03-17 0:53 ` FUJITA Tomonori 2009-03-17 14:52 ` James Bottomley 2009-03-17 14:52 ` James Bottomley 2009-03-14 19:20 ` [Bug #12645] DMI low-memory-protect quirk causes resume hang on Samsung NC10 Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12634] video distortion and lockup with i830 video chip and 2.6.28.3 Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12690] DPMS (LCD powersave, poweroff) don't work Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12798] No wake up after suspend Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12818] iwlagn broken after suspend to RAM (iwlagn: MAC is in deep sleep!) Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12835] Regression in backlight detection Rafael J. Wysocki 2009-03-14 19:20 ` Rafael J. Wysocki 2009-03-14 19:20 ` [Bug #12868] iproute2 and regressing "ipv6: convert tunnels to net_device_ops" Rafael J. Wysocki -- strict thread matches above, loose matches on Subject: below -- 2009-03-21 17:01 2.6.29-rc8-git5: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-03-21 17:07 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-03-21 17:07 ` Rafael J. Wysocki 2009-03-21 19:50 ` Ingo Molnar 2009-03-21 19:50 ` Ingo Molnar 2009-03-03 19:34 2.6.29-rc6-git7: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-03-03 19:41 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-03-03 19:41 ` Rafael J. Wysocki 2009-03-04 3:08 ` Kevin Shanahan 2009-03-04 3:08 ` Kevin Shanahan 2009-03-08 10:04 ` Avi Kivity 2009-03-08 10:04 ` Avi Kivity 2009-02-23 22:00 2.6.29-rc6: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-02-23 22:03 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-02-23 22:03 ` Rafael J. Wysocki 2009-02-24 0:59 ` Kevin Shanahan 2009-02-24 0:59 ` Kevin Shanahan 2009-02-24 1:37 ` Rafael J. Wysocki 2009-02-24 1:37 ` Rafael J. Wysocki 2009-02-24 12:09 ` Avi Kivity 2009-02-24 12:09 ` Avi Kivity 2009-02-24 22:11 ` Kevin Shanahan 2009-02-24 22:11 ` Kevin Shanahan 2009-02-14 20:48 2.6.29-rc5: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-02-14 20:50 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-02-14 20:50 ` Rafael J. Wysocki 2009-02-04 10:55 2.6.29-rc3-git6: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-02-04 10:58 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-02-04 10:58 ` Rafael J. Wysocki 2009-02-05 19:35 ` Kevin Shanahan 2009-02-05 19:35 ` Kevin Shanahan 2009-02-05 22:37 ` Rafael J. Wysocki 2009-02-05 22:37 ` Rafael J. Wysocki 2009-01-19 21:41 2.6.29-rc2-git1: Reported regressions 2.6.27 -> 2.6.28 Rafael J. Wysocki 2009-01-19 21:45 ` [Bug #12465] KVM guests stalling on 2.6.28 (bisected) Rafael J. Wysocki 2009-01-19 21:45 ` Rafael J. Wysocki 2009-01-20 0:12 ` Kevin Shanahan 2009-01-20 11:35 ` Ingo Molnar 2009-01-20 11:35 ` Ingo Molnar 2009-01-20 12:37 ` Avi Kivity 2009-01-20 12:37 ` Avi Kivity 2009-01-20 12:42 ` Kevin Shanahan 2009-01-20 12:42 ` Kevin Shanahan 2009-01-20 12:56 ` Ingo Molnar 2009-01-20 12:56 ` Ingo Molnar 2009-01-20 13:07 ` Ingo Molnar 2009-01-20 13:07 ` Ingo Molnar 2009-01-20 14:59 ` Steven Rostedt 2009-01-20 14:59 ` Steven Rostedt 2009-01-20 15:04 ` Ingo Molnar 2009-01-20 15:04 ` Ingo Molnar 2009-01-20 17:53 ` Steven Rostedt 2009-01-20 17:53 ` Steven Rostedt 2009-01-20 18:39 ` Ingo Molnar 2009-01-20 18:39 ` Ingo Molnar 2009-01-20 17:47 ` Avi Kivity 2009-01-20 17:47 ` Avi Kivity 2009-01-21 14:25 ` Kevin Shanahan 2009-01-21 14:25 ` Kevin Shanahan 2009-01-21 14:34 ` Avi Kivity 2009-01-21 14:34 ` Avi Kivity 2009-01-21 14:51 ` Kevin Shanahan 2009-01-21 14:51 ` Kevin Shanahan 2009-01-21 14:59 ` Avi Kivity 2009-01-21 14:59 ` Avi Kivity 2009-01-21 15:13 ` Steven Rostedt 2009-01-21 15:13 ` Steven Rostedt 2009-01-22 1:48 ` Steven Rostedt 2009-01-22 1:48 ` Steven Rostedt 2009-01-21 15:10 ` Steven Rostedt 2009-01-21 15:10 ` Steven Rostedt 2009-01-21 15:18 ` Ingo Molnar 2009-01-21 15:18 ` Ingo Molnar 2009-01-22 19:57 ` Kevin Shanahan 2009-01-22 20:31 ` Ingo Molnar 2009-01-22 20:31 ` Ingo Molnar 2009-01-26 9:55 ` Kevin Shanahan 2009-01-26 9:55 ` Kevin Shanahan 2009-01-26 11:35 ` Peter Zijlstra 2009-01-26 15:00 ` Ingo Molnar 2009-01-26 15:00 ` Ingo Molnar 2009-01-20 14:23 ` Kevin Shanahan 2009-01-20 14:23 ` Kevin Shanahan 2009-01-20 14:25 ` Ingo Molnar 2009-01-20 14:25 ` Ingo Molnar 2009-01-20 15:51 ` Kevin Shanahan 2009-01-20 15:51 ` Kevin Shanahan 2009-01-20 16:06 ` Ingo Molnar 2009-01-20 16:06 ` Ingo Molnar 2009-01-20 16:19 ` Peter Zijlstra 2009-01-20 16:19 ` Peter Zijlstra 2009-01-20 14:46 ` Frédéric Weisbecker 2009-01-20 14:46 ` Frédéric Weisbecker 2009-01-20 13:04 ` Avi Kivity 2009-01-20 13:04 ` Avi Kivity 2009-01-20 17:54 ` Kevin Shanahan 2009-01-20 17:54 ` Kevin Shanahan 2009-01-20 18:42 ` Ingo Molnar 2009-01-20 18:42 ` Ingo Molnar
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