[sheepdog] [PATCH 0/3] work: implement a dynamically changing thread pool

Liu Yuan namei.unix at gmail.com
Mon Oct 22 09:35:46 CEST 2012

On 10/22/2012 02:50 PM, Liu Yuan wrote:
> On 10/22/2012 02:43 PM, MORITA Kazutaka wrote:
>> I think of trying it, but I wish more users would test it too.
> I have tested it on my laptop and get the similar result.
> What I am only concerned is that if pthread signal & wakeup use a signal
> wakeup queue instead of multi-queues, the wakeup itself would be huge
> bottleneck. I'll try to figure it out what pthread signal use. For
> pthread_create, which use clone() sys call that scale well on SMP machine.

pthread signal use Futex, it might not be a scaling problem. But the new
queue_work() are serialized by a mutex (cond_mutex), so probably your
patch set won't perform as well as single IO source against heavy
multiple IO sources, which is the normal use case?


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