Messages in this thread | | | Date | Mon, 1 Feb 2010 14:23:09 +0100 | From | Jens Axboe <> | Subject | Re: [PATCH 00/12] perf lock: New subcommand "perf lock", for analyzing lock statistics |
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On Sun, Jan 31 2010, Jens Axboe wrote: > > I tested this on Core i7 965 + 3GB DRAM machine. > > Test program is mainly "perf bench sched messaging". > > > > Could you tell me the detail of your test situation? > > I tried to run it on a 64 thread box, on a fio job that was driving 80 > disks. It was just a quick test, but after ~20 seconds it had not even > gotten started yet, it was still stuck in setting up the jobs and > traversing sysfs for finding disk stats, etc. I can try something > lighter to see if it's the cpu count or the tough job that was making it > spiral into (near) death.
A simple 'perf lock rec ls' exhibits the same symptoms. It's been running for a minute or so now, no output. Even local network pings take 500-1000ms.
-- Jens Axboe
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