>-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Andrew Morton >Sent: Sunday, February 03, 2008 4:33 PM >To: Toralf Förster >Cc: linux-kernel@vger.kernel.org; [EMAIL PROTECTED] >Subject: Re: (ondemand) CPU governor regression between 2.6.23 >and 2.6.24 > >On Sat, 26 Jan 2008 15:06:25 +0100 Toralf Förster ><[EMAIL PROTECTED]> wrote: > >> I use a 1-liner for a simple performance check : "time >factor 819734028463158891" >> Here is the result for the new (Gentoo) kernel 2.6.24: >> >> With the ondemand governor of the I get: >> >> [EMAIL PROTECTED] ~/tmp $ time factor 819734028463158891 >> 819734028463158891: 3 273244676154386297 >> >> real 0m32.997s >> user 0m15.732s >> sys 0m0.014s >> >> With the ondemand governor the CPU runs at 600 MHz, >> whereas with the performance governor I get : >> >> [EMAIL PROTECTED] ~/tmp $ time factor 819734028463158891 >> 819734028463158891: 3 273244676154386297 >> >> real 0m10.893s >> user 0m5.444s >> sys 0m0.000s >> >> (~5.5 sec as I expected) b/c the CPU is set to 1.7 GHz. >> >> The ondeman governor of previous kernel versions however >automatically increased >> the CPU speed from 600 MHz to 1.7 GHz. >> >> My system is a ThinkPad T41, I'll attach the .config >> >
This looks like is related to the report here http://www.ussg.iu.edu/hypermail/linux/kernel/0801.3/1260.html Can you try the workarounds on that thread and see whether the problem goes away. Thanks, Venki -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
