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Date: Mon, 25 Jun 2007 18:00:12 -0600 From: corbet@....net (Jonathan Corbet) To: Ingo Molnar <mingo@...e.hu> Cc: Steven Rostedt <rostedt@...dmis.org>, LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Christoph Hellwig <hch@...radead.org>, john stultz <johnstul@...ibm.com>, Oleg Nesterov <oleg@...sign.ru>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Dipankar Sarma <dipankar@...ibm.com>, "David S. Miller" <davem@...emloft.net>, matthew.wilcox@...com, kuznet@....inr.ac.ru, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [RFC PATCH 0/6] Convert all tasklets to workqueues A couple of days ago I said: > The cafe_ccic (OLPC) camera driver uses a tasklet to move frames out of > the DMA buffers in the streaming I/O path.... > > Obviously some testing is called for here. I will make an attempt to do > that testing I've done that testing - I have an OLPC B3 unit running V2 of the tasklet->workqueue patch, and all seems well. 30 FPS to the display and no dropped frames. The tasklets/0 process is running 3-5% CPU, in case that's interesting. For whatever reason, I see about 3% *more* idle time when running just mplayer than I did without the patch. Consider my minor qualms withdrawn, there doesn't seem to be any trouble in this area. Thanks, jon Jonathan Corbet / LWN.net / corbet@....net - 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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