Messages in this thread | | | Subject | Re: 2.6.12-rc6-mm1 & 2K lun testing | From | Badari Pulavarty <> | Date | 16 Jun 2005 15:25:42 -0700 |
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On Thu, 2005-06-16 at 15:42, William Lee Irwin III wrote: > On Thu, Jun 16, 2005 at 12:50:59PM -0700, Badari Pulavarty wrote: > > Yes. I am using CFQ scheduler. I changed nr_requests to 4 for all > > my devices. I also changed "min_free_kbytes" to 64M. > > Response time is still bad. Here is the vmstat, meminfo, slabinfo > > and profle output. I am not sure why profile output shows > > default_idle(), when vmstat shows 100% CPU sys. > > It's because you're sorting on the third field of readprofile(1), > which is pure gibberish. Undoing this mistake will immediately > enlighten you.
Hmm.. I was under the impression that its gives useful info ..
Here is readprofile man-page says:
Print the 20 most loaded procedures: readprofile | sort -nr +2 | head -20
> Also, turn off slab poisoning when doing performance analyses.
Its already off. I am not trying to compare performance here. I was trying to analyze VM behaviour with filesystem tests. (with "raw" devices, machine is perfectly happy - but with filesystem cache it crawls).
Thanks, Badari
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