Charles R Harris wrote: > On Tue, Jul 5, 2011 at 8:37 AM, Charles R Harris > <[email protected]>wrote: > >> >> >> On Tue, Jul 5, 2011 at 8:13 AM, Neal Becker <[email protected]> wrote: >> >>> Charles R Harris wrote: >>> >>> > On Tue, Jul 5, 2011 at 7:45 AM, Neal Becker <[email protected]> >>> wrote: >>> > >>> >> I thought I'd try to speed up numpy on my fedora system by rebuilding >>> the >>> >> atlas >>> >> package so it would be tuned for my machine. But when I do: >>> >> >>> >> rpmbuild -ba -D 'enable_native_atlas 1' atlas.spec >>> >> >>> >> it fails with: >>> >> >>> >> res/zgemvN_5000_100 : VARIATION EXCEEDS TOLERENCE, RERUN WITH HIGHER >>> REPS. >>> >> >>> >> A bit of googling has not revealed a solution. Any hints? >>> >> >>> >> >>> >> >>> > I've never seen that, OTOH, I haven't built ATLAS in the last few years. >>> Do >>> > you have all the power saving/frequency changing options turned off? >>> What >>> > version of ATLAS are you using? What CPU? >>> > >>> > Chuck >>> >>> Ah, hadn't tried turing off cpuspeed. Try again... nope same error. >>> >>> 2 cpus, each: >>> model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz >>> stepping : 11 >>> cpu MHz : 800.000 << that's what it says @idle >>> >> >> You haven't got cpu frequency scaling under control. Linux? Depending on >> the distro you can write to a file in /sys (for each cpu) or run a program >> to make the setting, or click on a panel applet. Sometimes the scaling is >> set in the bios also. Google is your friend here. I have >> >> $charris@f13 ~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor >> ondemand >> >> And what you want to see is performance instead of ondemand. >> >> > Here's some good info <http://tinyurl.com/o8o7b>. > > Chuck
Thanks! Good info. But same result. # service cpuspeed stop # echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor # echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor build stopped exactly same as before. _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
