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
