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
That delta is suspiciously 5 minute long...
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Turtaut Geoffroy
Sent: Thursday, November 17, 2011 11:40 PM
To: Gianluca Varenni; [log in to unmask]
Subject: RE: console slowness in sl6.1
Yes
-----Message d'origine-----
De : Gianluca Varenni [mailto:[log in to unmask]]
Envoyé : vendredi 18 novembre 2011 08:38 À : Turtaut Geoffroy; [log in to unmask]
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:[log in to unmask]]
Sent: Thursday, November 17, 2011 11:35 PM
To: Gianluca Varenni; [log in to unmask]
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:[log in to unmask]]
Envoyé : vendredi 18 novembre 2011 08:26 À : Turtaut Geoffroy; [log in to unmask]
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: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Turtaut Geoffroy
Sent: Thursday, November 17, 2011 11:18 PM
To: [log in to unmask]
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
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