On 22/11/2007, Raj Mathur <[EMAIL PROTECTED]> wrote: > > If you want to see this in action, do the following on a relatively > unloaded system: > > - - Open up one terminal and run: sar -u 1 10000 > - - Open up another terminal and run: ls -lR / > /dev/null > > Watch the %iowait times in the sar output go up as ls keeps waiting to > read the disk. Now start up some CPU-intensive process like glxgears > (GNU Chess is even better) and watch the %iowait times go down. This > is because the time ls is spending waiting for I/O to complete is being > soaked up by glxgears/gnuchess using up the CPU. >
Wow! This was great. I could actually see %iowait go down from 48% to 13% when I launched glxgears! - Kazim Zaidi Blog: http://tuxplayground.blogspot.com _______________________________________________ ilugd mailinglist -- [email protected] http://frodo.hserus.net/mailman/listinfo/ilugd Next Event: http://freed.in - February 22/23, 2008 Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/[email protected]/
