Hello , Check this out http://xlife.zuavra.net/index.php/70/ It may help . Regards, On Thu, Dec 24, 2009 at 11:30 AM, Chumbalkar, Nagananda <Nagananda.Chumbalkar@xxxxxx> wrote: > > For the OS to control cpu scaling, change the BIOS setting under > Power Regulator to "OS Control". You should then see the "cpufreq" > directory created under cpuN in sysfs. > > - naga - > > >-----Original Message----- > >From: cpufreq-owner@xxxxxxxxxxxxxxx > >[mailto:cpufreq-owner@xxxxxxxxxxxxxxx] On Behalf Of Stephen Carr > >Sent: Wednesday, December 23, 2009 8:52 PM > >To: cpufreq@xxxxxxxxxxxxxxx > >Subject: Cpu frequency scaling DL360 G5 Dual Xeon > > > >Dear List > > > >I am try tot enable cpu scaling on a dual Xeon E5540 with all coes > >active (8) and hyperthreading giving a total of 16 cores. > > > >Kernel is 2.6.32.2 base on Slackware 13 64 bit. > > > >It seems the problem is in the sysfs structure which is > > > >ls -l /sys/devices/system/cpu/ > > > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu0/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu1/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu10/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu11/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu12/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu13/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu14/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu15/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu2/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu3/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu4/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu5/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu6/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu7/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu8/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpu9/ > >drwxr-xr-x 2 root root 0 2009-12-24 13:04 cpufreq/ > >drwxr-xr-x 2 root root 0 2009-12-24 13:04 cpuidle/ > >-r--r--r-- 1 root root 4096 2009-12-24 13:04 kernel_max > >-r--r--r-- 1 root root 4096 2009-12-24 13:04 offline > >-r--r--r-- 1 root root 4096 2009-12-24 13:04 online > >drwxr-xr-x 2 root root 0 2009-12-24 13:04 perf_events/ > >-r--r--r-- 1 root root 4096 2009-12-24 13:04 possible > >-r--r--r-- 1 root root 4096 2009-12-24 13:04 present > >-rw-r--r-- 1 root root 4096 2009-12-24 13:04 sched_mc_power_savings > >-rw-r--r-- 1 root root 4096 2009-12-24 13:04 sched_smt_power_savings > > > >Note cpufreq is not below cpuN (n=0-15) > > > >For cpu0 it is similar for all others > > > >ls -l /sys/devices/system/cpu/cpu0 > > > >drwxr-xr-x 6 root root 0 2009-12-24 13:04 cache/ > >drwxr-xr-x 6 root root 0 2009-12-24 23:18 cpuidle/ > >drwxr-xr-x 2 root root 0 2009-12-24 13:04 thermal_throttle/ > >drwxr-xr-x 2 root root 0 2009-12-24 13:04 topology/ > > > >With debug set to cpufreq.debug=7 > > > >The the output in /var/log/debug is attached cpu_debug.txt > > > >It seems nothing can be initialised. > > > >Also there is no ACPI throttle messages in dmesg aka /var/log/messages > > > >The BIOS seems to have CPU scaling enabled ie dynamic power. > > > >Any ideas? > > > >On my Thinkpad the sysfs structure similar kernel also based on 64 bit > >Slackware 13 kernel 2.6.31.6 CPU Intel(R) Core(TM)2 Duo CPU T5450 @ > >1.66GHz > > > >ls -l /sys/devices/system/cpu > > > >drwxr-xr-x 7 root root 0 2009-12-24 06:56 cpu0/ > >drwxr-xr-x 7 root root 0 2009-12-24 12:09 cpu1/ > >drwxr-xr-x 2 root root 0 2009-12-24 12:09 cpuidle/ > >-r--r--r-- 1 root root 4096 2009-12-24 12:09 kernel_max > >-r--r--r-- 1 root root 4096 2009-12-24 12:09 offline > >-r--r--r-- 1 root root 4096 2009-12-24 12:09 online > >drwxr-xr-x 2 root root 0 2009-12-24 12:09 perf_counters/ > >-r--r--r-- 1 root root 4096 2009-12-24 12:09 possible > >-r--r--r-- 1 root root 4096 2009-12-24 12:09 present > > > > > >ls -l /sys/devices/system/cpu/cpu0/ > > > >drwxr-xr-x 7 root root 0 2009-12-24 06:56 ./ > >drwxr-xr-x 6 root root 0 2009-12-24 06:56 ../ > >drwxr-xr-x 5 root root 0 2009-12-24 12:09 cache/ > >drwxr-xr-x 3 root root 0 2009-12-24 06:56 cpufreq/ > >drwxr-xr-x 6 root root 0 2009-12-24 12:09 cpuidle/ > >drwxr-xr-x 2 root root 0 2009-12-24 12:09 thermal_throttle/ > >drwxr-xr-x 2 root root 0 2009-12-24 12:09 topology/ > > > >Thanks > >Stephen Carr > >-- > >Stephen Carr > >School of Civil, Environmental & Mining Engineering > >The University of Adelaide > >Adelaide, South Australia, 5005 > >Australia > >Tel +618-8303-4313 > >Fax +618-8303-4359 > > > >Email sgcarr@xxxxxxxxxxxxxxxxxxxxxx > > > >CRICOS Provider Number 00123M > >----------------------------------------------------------- > >This email message is intended only for the addressee(s) and > >contains information that may be confidential and/or copyright. > >If you are not the intended recipient please notify the sender > >by reply email and immediately delete this email. Use, disclosure > >or reproduction of this email by anyone other than the intended > >recipient(s) is strictly prohibited. No representation is made > >that this email or any attachments are free of viruses. Virus > >scanning is recommended and is the responsibility of the recipient. > > > >-- > To unsubscribe from this list: send the line "unsubscribe cpufreq" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- tarek -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
