Messages in this thread | | | Date | Fri, 11 Nov 2011 09:02:44 -0800 | From | Tejun Heo <> | Subject | Re: [PATCH 3/3] pids: Make it possible to clone tasks with given pids |
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Hello,
On Fri, Nov 11, 2011 at 08:49:50PM +0400, Pavel Emelyanov wrote: > 1 cpu 500k forks - 37s
That's ~14k forks per sec. Do you still think you need parallel forking?
> 2 cpus on different cores 500k forks on each in parallel - 39s > 4 cpus on different cores 500k forks on each in parallel - 41s > > 8 cpus 500k forks on each in parallel - 1m5s > > So the fork() scaling seems quite good to me.
Yeah, looks pretty good actually. Hmmm, this is on a single socket w/ shared cache where cacheline bouncing is quite cheap, right? Also, how are those forking processes related? On multiple sockets, it's gonna scale worse. Dunno how much tho.
At any rate, if you do the rest in paralllel, whether forking is parallel or not is immaterial. Let's just do something least intrusive.
Thanks.
-- tejun
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