On Nov 19, 2011, at 22:22 , Yi Ding wrote: > I do have a i7-920 (Nehalem) processor in my machine, but I haven't > seen the tsc unstable issue.
That shows up much less frequently than than the hangs. Trying the workaround is probably a good idea in your case, and extremely unlikely to break anything or make things worse. intel_idle.max_cstate=1 works fine for us, at the cost of some waste of electrical power. If this helps in your case, please consider adding data to the BZ. Cheers, Stephan > > Thanks, > Yi > > On Fri, Nov 18, 2011 at 11:54 AM, Stephan Wiesand > <stephan.wies...@desy.de> 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: owner-scientific-linux-us...@listserv.fnal.gov >>> [mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of >>> Turtaut Geoffroy >>> Sent: Thursday, November 17, 2011 11:40 PM >>> To: Gianluca Varenni; SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV >>> Subject: RE: console slowness in sl6.1 >>> >>> Yes >>> >>> >>> -----Message d'origine----- >>> De : Gianluca Varenni [mailto:gianluca.vare...@riverbed.com] >>> Envoyé : vendredi 18 novembre 2011 08:38 À : Turtaut Geoffroy; >>> SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV >>> 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:geoffroy.turt...@dassault-aviation.com] >>> Sent: Thursday, November 17, 2011 11:35 PM >>> To: Gianluca Varenni; SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV >>> 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:gianluca.vare...@riverbed.com] >>> Envoyé : vendredi 18 novembre 2011 08:26 À : Turtaut Geoffroy; >>> SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV >>> 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: owner-scientific-linux-us...@listserv.fnal.gov >>> [mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of >>> Turtaut Geoffroy >>> Sent: Thursday, November 17, 2011 11:18 PM >>> To: SCIENTIFIC-LINUX-USERS@LISTSERV.FNAL.GOV >>> 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 >> -- Stephan Wiesand DESY -DV- Platanenenallee 6 15738 Zeuthen, Germany