there are other options on prstat to see the usr and sys time separately, like prstat -m
iostat, vmstat and mpstat all read the same numbers out of the kernel, so if you see differences on the same machine then it is because they are not synchronized and they format the results differently. In Solaris 10, iowait is no longer measured and will be reported as zero by existing tools. Since iowait was always a variant of idle time, this makes no difference to usr or sys time. iowait was always a confusing and useless metric, which is why it was removed. Adrian http://perfcap.blogspot.com On 10/18/06, Cherian Abraham <[EMAIL PROTECTED]> wrote:
Hi, I was trying to understand the prstat output, but had quite a few doubts on the output shown. Does the prstat CPU usage display by default for each process reflect the user cpu time or a total of user and system cpu time ? PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP 25141 root 6584K 5872K run 0 0 0:00:00 0.6% processA/1 25102 root 6496K 5776K sleep 40 0 0:00:00 0.6% processB/1 993 root 11M 9992K sleep 54 0 2:58:27 0.6% processC/5 24415 root 6576K 5776K sleep 52 0 0:00:00 0.4% processD/1 Top has an additional 4 lines that shows total CPU and memory usages. Since prstat does not show the output, i was thinking of using CPU usage shown by iostat. For some reason, iostat cpu usage shown seems to match closer to top, but vmstat and mpstat does not. Does anyone know why this difference and which would be the best tool to use to get the total CPU usages (as user, system, io wait and idle) ? Would appreciate some guidance... This message posted from opensolaris.org _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
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