* strange keyboard lag after suspend testing @ 2007-03-20 15:33 Pavel Machek 2007-03-20 16:00 ` Andreas Mohr 0 siblings, 1 reply; 9+ messages in thread From: Pavel Machek @ 2007-03-20 15:33 UTC (permalink / raw) To: vojtech, dmitry.torokhov, kernel list Hi! I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels like someone added 50..100msec delay somewhere in keyboard handling. Mouse does not seem affected. /proc/interrupts seem to increase as they should, for both keyboard and mouse. Can someone reproduce it? Any ideas how to debug it? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 15:33 strange keyboard lag after suspend testing Pavel Machek @ 2007-03-20 16:00 ` Andreas Mohr 2007-03-20 16:03 ` Pavel Machek 0 siblings, 1 reply; 9+ messages in thread From: Andreas Mohr @ 2007-03-20 16:00 UTC (permalink / raw) To: Pavel Machek; +Cc: vojtech, dmitry.torokhov, kernel list Hi, On Tue, Mar 20, 2007 at 04:33:32PM +0100, Pavel Machek wrote: > Hi! > > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > like someone added 50..100msec delay somewhere in keyboard > handling. Mouse does not seem affected. /proc/interrupts seem to > increase as they should, for both keyboard and mouse. Can someone > reproduce it? Any ideas how to debug it? Probably just asking the obvious: it's not a trivial "failed to re-configure repeat rate upon resume" (which one could rule out by running "kbdrate" again) but a lag in some interrupt handler or somewhere else deeper, right? Andreas Mohr ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:00 ` Andreas Mohr @ 2007-03-20 16:03 ` Pavel Machek 2007-03-20 16:09 ` Dmitry Torokhov 0 siblings, 1 reply; 9+ messages in thread From: Pavel Machek @ 2007-03-20 16:03 UTC (permalink / raw) To: Andreas Mohr; +Cc: vojtech, dmitry.torokhov, kernel list Hi! > > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > like someone added 50..100msec delay somewhere in keyboard > > handling. Mouse does not seem affected. /proc/interrupts seem to > > increase as they should, for both keyboard and mouse. Can someone > > reproduce it? Any ideas how to debug it? > > Probably just asking the obvious: > it's not a trivial "failed to re-configure repeat rate upon resume" > (which one could rule out by running "kbdrate" again) > but a lag in some interrupt handler or somewhere else deeper, right? No, it is not keyboard rate. Keyboard lags during normal typing, sometimes letters come in groups of two or so... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:03 ` Pavel Machek @ 2007-03-20 16:09 ` Dmitry Torokhov 2007-03-20 16:31 ` Pavel Machek 0 siblings, 1 reply; 9+ messages in thread From: Dmitry Torokhov @ 2007-03-20 16:09 UTC (permalink / raw) To: Pavel Machek; +Cc: Andreas Mohr, vojtech, kernel list On 3/20/07, Pavel Machek <pavel@ucw.cz> wrote: > Hi! > > > > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > > like someone added 50..100msec delay somewhere in keyboard > > > handling. Mouse does not seem affected. /proc/interrupts seem to > > > increase as they should, for both keyboard and mouse. Can someone > > > reproduce it? Any ideas how to debug it? > > > > Probably just asking the obvious: > > it's not a trivial "failed to re-configure repeat rate upon resume" > > (which one could rule out by running "kbdrate" again) > > but a lag in some interrupt handler or somewhere else deeper, right? > > No, it is not keyboard rate. Keyboard lags during normal typing, > sometimes letters come in groups of two or so... I might start looking at embedded controller changes and switches. If ACPI misbehaves that could starve keyboard controller... But you said that mouse is OK... Hmm, what happens if you load evbug and type while watching syslog. Do you observe the same delays? -- Dmitry ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:09 ` Dmitry Torokhov @ 2007-03-20 16:31 ` Pavel Machek 2007-03-20 16:38 ` Pavel Machek 0 siblings, 1 reply; 9+ messages in thread From: Pavel Machek @ 2007-03-20 16:31 UTC (permalink / raw) To: Dmitry Torokhov; +Cc: Andreas Mohr, vojtech, kernel list Hi! > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > >> > like someone added 50..100msec delay somewhere in keyboard > >> > handling. Mouse does not seem affected. /proc/interrupts seem to > >> > increase as they should, for both keyboard and mouse. Can someone > >> > reproduce it? Any ideas how to debug it? > >> > >> Probably just asking the obvious: > >> it's not a trivial "failed to re-configure repeat rate upon resume" > >> (which one could rule out by running "kbdrate" again) > >> but a lag in some interrupt handler or somewhere else deeper, right? > > > >No, it is not keyboard rate. Keyboard lags during normal typing, > >sometimes letters come in groups of two or so... > > I might start looking at embedded controller changes and switches. If > ACPI misbehaves that could starve keyboard controller... But you > said Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > that mouse is OK... Hmm, what happens if you load evbug and type while > watching syslog. Do you observe the same delays? Hmm, seems that it only happens in X... so maybe it is some strange scheduling artefact? Hmm, something is wrong here: On console, I get expected 4-5 ticks a second. In x in gnome-terminal, I get this: root@amd:~# while true ; do echo -n . ; sleep .2; date; done .Tue Mar 20 17:28:34 CET 2007 .Tue Mar 20 17:28:35 CET 2007 .Tue Mar 20 17:28:35 CET 2007 .Tue Mar 20 17:28:35 CET 2007 .Tue Mar 20 17:28:36 CET 2007 .Tue Mar 20 17:28:36 CET 2007 .Tue Mar 20 17:28:36 CET 2007 .Tue Mar 20 17:28:36 CET 2007 .Tue Mar 20 17:28:37 CET 2007 .Tue Mar 20 17:28:37 CET 2007 .Tue Mar 20 17:28:37 CET 2007 .Tue Mar 20 17:28:37 CET 2007 .Tue Mar 20 17:28:38 CET 2007 .Tue Mar 20 17:28:38 CET 2007 .Tue Mar 20 17:28:38 CET 2007 .Tue Mar 20 17:28:39 CET 2007 .Tue Mar 20 17:28:39 CET 2007 .Tue Mar 20 17:28:39 CET 2007 .Tue Mar 20 17:28:39 CET 2007 .Tue Mar 20 17:28:39 CET 2007 .Tue Mar 20 17:28:40 CET 2007 .Tue Mar 20 17:28:40 CET 2007 .Tue Mar 20 17:28:40 CET 2007 .Tue Mar 20 17:28:40 CET 2007 .Tue Mar 20 17:28:41 CET 2007 .Tue Mar 20 17:28:41 CET 2007 .Tue Mar 20 17:28:41 CET 2007 .Tue Mar 20 17:28:42 CET 2007 .Tue Mar 20 17:28:42 CET 2007 So sorry for false alarm, it is not keyboard related, it is just very very strange. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:31 ` Pavel Machek @ 2007-03-20 16:38 ` Pavel Machek 2007-03-20 21:56 ` Rafael J. Wysocki 2007-03-21 20:12 ` Luca Tettamanti 0 siblings, 2 replies; 9+ messages in thread From: Pavel Machek @ 2007-03-20 16:38 UTC (permalink / raw) To: Dmitry Torokhov, Len Brown; +Cc: Andreas Mohr, vojtech, kernel list Hi! > > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > >> > like someone added 50..100msec delay somewhere in keyboard > > >> > handling. Mouse does not seem affected. /proc/interrupts seem to > > >> > increase as they should, for both keyboard and mouse. Can someone > > >> > reproduce it? Any ideas how to debug it? > > >> > > >> Probably just asking the obvious: > > >> it's not a trivial "failed to re-configure repeat rate upon resume" > > >> (which one could rule out by running "kbdrate" again) > > >> but a lag in some interrupt handler or somewhere else deeper, right? > > > > > >No, it is not keyboard rate. Keyboard lags during normal typing, > > >sometimes letters come in groups of two or so... > > > > I might start looking at embedded controller changes and switches. If > > ACPI misbehaves that could starve keyboard controller... But you > > said > > Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > > > that mouse is OK... Hmm, what happens if you load evbug and type while > > watching syslog. Do you observe the same delays? > > Hmm, seems that it only happens in X... so maybe it is some strange > scheduling artefact? > > Hmm, something is wrong here: > > On console, I get expected 4-5 ticks a second. In x in gnome-terminal, > I get this: It gets weirder: I killed some tasks and now: (on unloaded system running X, notice that top latency was ~1sec at 33:09). root@amd:~# while true ; do echo -n . ; sleep .2; date; done .Tue Mar 20 17:33:07 CET 2007 .Tue Mar 20 17:33:07 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:09 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:12 CET 2007 .Tue Mar 20 17:33:12 CET 2007 As soon as I load the cpu up with while1, machine starts to behave. When I turn on bluetooth (USB), ACPI can no longer use C3, and machine starts to behave. Hmm? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:38 ` Pavel Machek @ 2007-03-20 21:56 ` Rafael J. Wysocki 2007-03-21 20:12 ` Luca Tettamanti 1 sibling, 0 replies; 9+ messages in thread From: Rafael J. Wysocki @ 2007-03-20 21:56 UTC (permalink / raw) To: Pavel Machek Cc: Dmitry Torokhov, Len Brown, Andreas Mohr, vojtech, kernel list On Tuesday, 20 March 2007 17:38, Pavel Machek wrote: > Hi! > > > > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > > >> > like someone added 50..100msec delay somewhere in keyboard > > > >> > handling. Mouse does not seem affected. /proc/interrupts seem to > > > >> > increase as they should, for both keyboard and mouse. Can someone > > > >> > reproduce it? Any ideas how to debug it? > > > >> > > > >> Probably just asking the obvious: > > > >> it's not a trivial "failed to re-configure repeat rate upon resume" > > > >> (which one could rule out by running "kbdrate" again) > > > >> but a lag in some interrupt handler or somewhere else deeper, right? > > > > > > > >No, it is not keyboard rate. Keyboard lags during normal typing, > > > >sometimes letters come in groups of two or so... > > > > > > I might start looking at embedded controller changes and switches. If > > > ACPI misbehaves that could starve keyboard controller... But you > > > said > > > > Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > > > > > that mouse is OK... Hmm, what happens if you load evbug and type while > > > watching syslog. Do you observe the same delays? > > > > Hmm, seems that it only happens in X... so maybe it is some strange > > scheduling artefact? > > > > Hmm, something is wrong here: > > > > On console, I get expected 4-5 ticks a second. In x in gnome-terminal, > > I get this: > > It gets weirder: I killed some tasks and now: (on unloaded system > running X, notice that top latency was ~1sec at 33:09). > > root@amd:~# while true ; do echo -n . ; sleep .2; date; done > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:09 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > > As soon as I load the cpu up with while1, machine starts to behave. > > When I turn on bluetooth (USB), ACPI can no longer use C3, and machine > starts to behave. Hmm? Smells like a cpufreq problem or something related. Greetings, Rafael ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-20 16:38 ` Pavel Machek 2007-03-20 21:56 ` Rafael J. Wysocki @ 2007-03-21 20:12 ` Luca Tettamanti 2007-03-21 22:22 ` Pavel Machek 1 sibling, 1 reply; 9+ messages in thread From: Luca Tettamanti @ 2007-03-21 20:12 UTC (permalink / raw) To: Pavel Machek; +Cc: Andreas Mohr, vojtech, linux-kernel, Thomas Gleixner Adding Thomas Gleixner to CC Pavel Machek <pavel@ucw.cz> ha scritto: > Hi! > >> > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels >> > >> > like someone added 50..100msec delay somewhere in keyboard >> > >> > handling. Mouse does not seem affected. /proc/interrupts seem to >> > >> > increase as they should, for both keyboard and mouse. Can someone >> > >> > reproduce it? Any ideas how to debug it? >> > >> >> > >> Probably just asking the obvious: >> > >> it's not a trivial "failed to re-configure repeat rate upon resume" >> > >> (which one could rule out by running "kbdrate" again) >> > >> but a lag in some interrupt handler or somewhere else deeper, right? >> > > >> > >No, it is not keyboard rate. Keyboard lags during normal typing, >> > >sometimes letters come in groups of two or so... >> > >> > I might start looking at embedded controller changes and switches. If >> > ACPI misbehaves that could starve keyboard controller... But you >> > said >> >> Mouse _seems_ okay, but I'm not sure if I'd notice lag there. >> >> > that mouse is OK... Hmm, what happens if you load evbug and type while >> > watching syslog. Do you observe the same delays? >> >> Hmm, seems that it only happens in X... so maybe it is some strange >> scheduling artefact? >> >> Hmm, something is wrong here: >> >> On console, I get expected 4-5 ticks a second. In x in gnome-terminal, >> I get this: > > It gets weirder: I killed some tasks and now: (on unloaded system > running X, notice that top latency was ~1sec at 33:09). > > root@amd:~# while true ; do echo -n . ; sleep .2; date; done > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:07 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:08 CET 2007 > .Tue Mar 20 17:33:09 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:10 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:11 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > .Tue Mar 20 17:33:12 CET 2007 > > As soon as I load the cpu up with while1, machine starts to behave. > > When I turn on bluetooth (USB), ACPI can no longer use C3, and machine > starts to behave. Hmm? When the CPU is in C3 the TSC and LAPIC (IIRC) are stopped, sounds like the problem is here. Maybe after resume kernel fails to fall back to a "safe" clocksource. Luca -- Inquietudine sintetica Solo, davanti all'ignoto Tienimi stretto a te ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: strange keyboard lag after suspend testing 2007-03-21 20:12 ` Luca Tettamanti @ 2007-03-21 22:22 ` Pavel Machek 0 siblings, 0 replies; 9+ messages in thread From: Pavel Machek @ 2007-03-21 22:22 UTC (permalink / raw) To: Luca Tettamanti; +Cc: Andreas Mohr, vojtech, linux-kernel, Thomas Gleixner Hi! > >> > >No, it is not keyboard rate. Keyboard lags during normal typing, > >> > >sometimes letters come in groups of two or so... > >> > > >> > I might start looking at embedded controller changes and switches. If > >> > ACPI misbehaves that could starve keyboard controller... But you > >> > said > >> > >> Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > >> > >> > that mouse is OK... Hmm, what happens if you load evbug and type while > >> > watching syslog. Do you observe the same delays? > >> > >> Hmm, seems that it only happens in X... so maybe it is some strange > >> scheduling artefact? > >> > >> Hmm, something is wrong here: > >> > >> On console, I get expected 4-5 ticks a second. In x in gnome-terminal, > >> I get this: > > > > It gets weirder: I killed some tasks and now: (on unloaded system > > running X, notice that top latency was ~1sec at 33:09). > > > > root@amd:~# while true ; do echo -n . ; sleep .2; date; done > > .Tue Mar 20 17:33:07 CET 2007 > > .Tue Mar 20 17:33:07 CET 2007 > > .Tue Mar 20 17:33:08 CET 2007 > > .Tue Mar 20 17:33:08 CET 2007 > > .Tue Mar 20 17:33:08 CET 2007 > > .Tue Mar 20 17:33:08 CET 2007 > > .Tue Mar 20 17:33:09 CET 2007 > > .Tue Mar 20 17:33:10 CET 2007 > > .Tue Mar 20 17:33:10 CET 2007 > > .Tue Mar 20 17:33:10 CET 2007 > > .Tue Mar 20 17:33:10 CET 2007 > > .Tue Mar 20 17:33:10 CET 2007 > > .Tue Mar 20 17:33:11 CET 2007 > > .Tue Mar 20 17:33:11 CET 2007 > > .Tue Mar 20 17:33:11 CET 2007 > > .Tue Mar 20 17:33:12 CET 2007 > > .Tue Mar 20 17:33:12 CET 2007 > > > > As soon as I load the cpu up with while1, machine starts to behave. > > > > When I turn on bluetooth (USB), ACPI can no longer use C3, and machine > > starts to behave. Hmm? > > When the CPU is in C3 the TSC and LAPIC (IIRC) are stopped, sounds like > the problem is here. Maybe after resume kernel fails to fall back to a > "safe" clocksource. Notice that problem is _not_ easily reproducible :-(. One suspend is not enough to trigger it. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2007-03-21 22:22 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2007-03-20 15:33 strange keyboard lag after suspend testing Pavel Machek 2007-03-20 16:00 ` Andreas Mohr 2007-03-20 16:03 ` Pavel Machek 2007-03-20 16:09 ` Dmitry Torokhov 2007-03-20 16:31 ` Pavel Machek 2007-03-20 16:38 ` Pavel Machek 2007-03-20 21:56 ` Rafael J. Wysocki 2007-03-21 20:12 ` Luca Tettamanti 2007-03-21 22:22 ` Pavel Machek
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