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Date: Sat, 19 Dec 2009 14:56:04 +0100 From: Jean Delvare <jdelvare@...e.de> To: minyard@....org Cc: Andrew Morton <akpm@...ux-foundation.org>, Linux Kernel <linux-kernel@...r.kernel.org>, Martin Wilck <martin.wilck@...fujitsu.com>, OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net> Subject: Re: [PATCH] IPMI: Add parameter to limit CPU usage in kipmid Le jeudi 17 décembre 2009 23:08, Corey Minyard a écrit : > I cleaned up the patch some. I added some state results to the list of > things to be busy waited for (should improve performance a bit) and > changed the schedule_timeout_interruptible back to 1, since that's > what it's supposed to be. And I added some comments. Thanks for doing this! > I did some testing on my system here. On my system, kipmid uses almost > no CPU normally. If I set the kipmid_max_busy_us value to 500, the > interface was more than 5 times slower. I had to set the value up to > 35000 for it to go back to the normal performance, and it was pretty > linear between the two values. So this is definiately not for all > systems. > > Can you try this out to make sure its ok? I don't have any hardware where I can test this myself. But hopefully Martin does? Thanks, -- Jean Delvare Suse L3 -- 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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