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Date: Sat, 3 Oct 2009 04:59:22 +0200 From: Andi Kleen <andi@...stfloor.org> To: Tejun Heo <tj@...nel.org> Cc: Andi Kleen <andi@...stfloor.org>, jeff@...zik.org, mingo@...e.hu, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, jens.axboe@...cle.com, rusty@...tcorp.com.au, cl@...ux-foundation.org, dhowells@...hat.com, ar@...stfloor.org Subject: Re: [PATCH 19/19] workqueue: implement concurrency managed workqueue > One thing is that for userspace there's already pretty thick layer of > abstraction in place and having this type of bare metal mechanism > might not buy much. In most cases, monitoring system parameters That can be costly in terms of power/cpu cycles. > periodically and supplying a bit of extra threads should be able to > achieve about the same result. Do you have anything specific on your > mind? I was thinking of a special file descriptor that could be polled on. Register threads to be monitored and get a notification back this way when they are busy above some threshold. Then a runtime could start more threads upto the maximum number of cores. This would be mainly useful with existing work distributing libraries like threadbuildingblocks. -Andi -- ak@...ux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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