On Mon, May 31, 2010 at 10:51 AM, Mike Fleetwood <mike.fleetwood@xxxxxxxxxxxxxx> wrote: [... cut ...] > Hi Marco, > > I'm no expert but it sound to me like you have a latency issue. For > some reason your machine is sometimes having to wait 1 to 4 seconds > before it can give a program (vim, bash, etc.) its CPU time slice, > hence the apparent delay. > > I have seen this kind of thing before when the kernel has to re-try > disk I/O multiple times on a failing hard drive. > > Suggestions: > 1) Play music! If it pauses when your app pauses it is an OS wide > issue effecting everything. I will try tonight at home > 2) Run top in another window. When top refreshes after the pause does > any process jump to the top? No process seems to have a great impact on CPU usage. These below are the more time consuming processes: 1563 root 20 0 172m 42m 11m S 3.6 2.1 4:39.59 Xorg 2751 marco 20 0 942m 173m 30m S 3.6 8.7 4:32.69 firefox 2790 marco 20 0 419m 19m 10m S 2.0 1.0 2:11.23 npviewer.bin After refresh, Xorg goes from 1.0 to 2.5 % of CPU. This percentage increase to ~16% when I switch between wm virtual desktops. > 3) Check /var/log/messages for any errors. > Done, but no meaningful information (or maybe I don't know what to look for). > Vague ideas: > 4) Google for investigating latency issues. > 5) With modern kernels I guess it should be possible to dynamically > trace it to find the lateny issue, but I have no idea how. > > Sorry I can't be more help, > Mike Thank you very much for your help. Hope someone other can help me :) In addition to system information provided in previous email I add that my notebook is a DELL Latitude D830 Cheers, -- Marco -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
