I do have a i7-920 (Nehalem) processor in my machine, but I haven't seen the tsc unstable issue.
Thanks, Yi On Fri, Nov 18, 2011 at 11:54 AM, Stephan Wiesand <[email protected]> wrote: > On Nov 18, 2011, at 18:44 , Fabrizio Giordano wrote: > >> I get the same behaviour on my Scientific Linux 6.0 (kernel 2.6.32): my >> console becomes terribly slow for about 5 minutes. This is what I read when >> I call 'dmesg': >> >> Clocksource tsc unstable (delta = 299996380341 ns) >> Switching to clocksource hpet > > It's not the first time while following this thread that I wonder whether > this is yet another manifestation of the "Nehalem deep C states" problem. See > https://bugzilla.redhat.com/show_bug.cgi?id=710265 > > Cheers, > Stephan > >> >> That delta is suspiciously 5 minute long... >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Turtaut >> Geoffroy >> Sent: Thursday, November 17, 2011 11:40 PM >> To: Gianluca Varenni; [email protected] >> Subject: RE: console slowness in sl6.1 >> >> Yes >> >> >> -----Message d'origine----- >> De : Gianluca Varenni [mailto:[email protected]] >> Envoyé : vendredi 18 novembre 2011 08:38 À : Turtaut Geoffroy; >> [email protected] >> Objet : RE: console slowness in sl6.1 >> >> Does it happen if you run in purely text mode too (runlevel 3)? I've noticed >> something similar (several seconds), but totally sporadically. Not much runs >> on my machine, pretty much the a bare minimal text installation. >> >> GV >> >> -----Original Message----- >> From: Turtaut Geoffroy [mailto:[email protected]] >> Sent: Thursday, November 17, 2011 11:35 PM >> To: Gianluca Varenni; [email protected] >> Subject: RE: console slowness in sl6.1 >> >> When we hit a key, it takes 1 or 2 seconds (or more). >> Applications are slow, Ctrl+Alt+F2 can take 30 seconds, ps -ef 10 seconds, >> df, ... >> >> The problems appears at random intervals, for 5 minutes. >> >> Just before and just after, no problem >> >> The problem appears on : >> Standalone system (no name services, dns, ldap, no network, ..) Network >> workstation (dns, ldap, ...) >> >> Geoffroy >> >> >> -----Message d'origine----- >> De : Gianluca Varenni [mailto:[email protected]] >> Envoyé : vendredi 18 novembre 2011 08:26 À : Turtaut Geoffroy; >> [email protected] >> Objet : RE: console slowness in sl6.1 >> >> What happens when it's extremely slow? Like you hit a key and it's not >> echoed on the screen for a long time (seconds)? >> >> Have a nice day >> GV >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Turtaut >> Geoffroy >> Sent: Thursday, November 17, 2011 11:18 PM >> To: [email protected] >> Subject: Re: console slowness in sl6.1 >> >> Hi, >> >> We have the same issue since we use RHEL 6.X/SL 6.X >> >> Topic : HP Z400 system very slow at ramdom times for 5 minutes (october 2011) >> >> We use HP workstations (XW4600, Z200, Z400, ...), VM, DELL laptops and the >> problem is only present on Z400 (xeon) et an HP pavilion (corei7). >> >> The problem is not present if we use 2.6.32 kernel from kernel.org. >> >> We have a case on RHN ... >> >> Last RH comment was : >> We have analysed the results and see that there is nothing waiting on I/O >> but there is a high CPU usage and large run queue. >> >> Geoffroy Turtaut > > -- > Stephan Wiesand > DESY -DV- > Platanenenallee 6 > 15738 Zeuthen, Germany >
