Centos Kernel HighRes Timer

Posted on 2011-10-20
Last Modified: 2012-05-12
Hi Guys,
     How can i check if the centos kernel has highres memory timer enabled on it, or how do i turn it off if it is turned on. The known way to check the support seems to be cat /proc/timer_list , but i dont seem to have that on my system.

Centos :  5.5 Final

Arch : i386

Kernel Version : 2.6.18-238.9.1.el5PAE


Question by:amitnepal
    LVL 6

    Accepted Solution

    Hi, i think you can check that in your /boot directory by "cat config-your-kernel-version | grep CONFIG_HIGH_RES_TIMERS".

    Here is the link where i got the info from:
    LVL 7

    Author Comment

    Thanks, I could check that , but .. looks like my version of kernel didn't have that parameter.

    Actually I am getting task hung for more than 120 seconds error and the server just freezes..Any ideas ?
    LVL 6

    Expert Comment

    Hi, when does the error occured for the first time? How often does the error occurs? Did you apply any updates before the error occured? Can you login via SSH or shutdown via magic SysRQ key when the server freezes? Did you try to run an older kernel? Are there any other anomalities in the logs?
    LVL 7

    Author Comment

    The error occurs randomly in a week or two weeks period. No updates, I can't login via ssh when the system freezes. The log just shows rsync was hung for more than 120 seconds.

    LVL 7

    Author Closing Comment

    Thanks, The command  was good to view the High Res timer support, but that was not enough to answer my question. However, the command to view the high res timer support was right.

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