Subject: Re: Cpufreq on AMD dual opteron 242 - msg#00012

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Re: powernow-k7: wrong FSB frequency detection

On Thu, Jul 01, 2004 at 08:35:49PM +0400, Sergey Vlasov wrote: > On Thu, Jul 01, 2004 at 05:28:03PM +0200, Bruno Ducrot wrote: > > On Thu, Jul 01, 2004 at 04:25:55PM +0400, Sergey Vlasov wrote: > > > On the MaxSelect A7W notebook the powernow-k7 driver in kernel 2.6.7 > > > basically works, but shows completely wrong frequency values: > > > > > > # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies > > > 4355876 3266907 2800206 2489072 2177938 1555670 > > > > [skip] > > Could you please try this little debug stuff ? That will not help for > > now, but I want to be sure. > Thanks. IMHO we should restore the old behaviour, that is using the max fid as per powernow spec, then provide something for people who unfortunately do have borken bios (those who put the processor not in max fid before booting OS). Dave, could you please apply this patch? I will provide the workaround for the unfortunate tomorow, after searching who do have the borken bios, and probably yet another powernow boot option :( --- linux-2.6/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2004/07/01 15:01:46 1.1 +++ linux-2.6/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2004/07/01 17:56:12 @@ -565,7 +565,7 @@ static int __init powernow_cpu_init (str rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val); /* A K7 with powernow technology is set to max frequency by BIOS */ - fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.CFID]; + fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.MFID]; if (!fsb) { printk(KERN_WARNING PFX "can not determine bus frequency\n"); return -EINVAL; -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.

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Cpufreq on AMD dual opteron 242

Isn't there anoter way to do some frequency scaling with my cpu's ? Moreover, i've read that some problems where linked to some incompatible bios, couldn't it be the case? (I've got serverBios 3.0) Marc Bruno Ducrot wrote: > Thanks. The power management line do have only the 'ts' and > 'ttp' flags > ('thermal sensor' and 'thermal trip point') but there is no > 'fid' nor > 'vid' (fid is related to frequency control, and vid for > voltage). > I'm afraid your processors do not support powernow > technology. > Cheers, ___________________________________ NOCC, http://nocc.sourceforge.net

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Re: Cpufreq on AMD dual opteron 242

Of course, Here you are: dunette parser 399 % cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 242 stepping : 1 cpu MHz : 1603.674 cache size : 1024 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow bogomips : 3153.92 TLB size : 1088 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(tm) Processor 242 stepping : 1 cpu MHz : 1603.674 cache size : 1024 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow bogomips : 3203.07 TLB size : 1088 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp Bruno Ducrot <ducrot@xxxxxxxxxxxx> a écrit : > On Thu, Jul 01, 2004 at 01:23:55PM +0200, Marc.Thierry wrote: > &gt; > &gt; Hi, > &gt; > &gt; i'm having problems with using cpufreq on my dual opteron. > &gt; i've already used cpufreq on a p4 and i was able to make it work. > &gt; > &gt; 'dmesg |grep powernow' returns : > &gt; > &gt; powernow-k8: Power state transitions not supported > &gt; powernow-k8: Power state transitions not supported > &gt; > &gt; after a 'modprobe powernow-k8' and of course there's no file at > &quot;/sys/devices/system/cpu/cpu*/&quot; > &gt; > > Could you please include a > cat /proc/cpuinfo > in your report? Thanks. > > -- > Bruno Ducrot > > -- Which is worse: ignorance or apathy? > -- Don't know. Don't care. ___________________________________ NOCC, http://nocc.sourceforge.net

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Cpufreq on AMD dual opteron 242

Isn't there anoter way to do some frequency scaling with my cpu's ? Moreover, i've read that some problems where linked to some incompatible bios, couldn't it be the case? (I've got serverBios 3.0) Marc Bruno Ducrot wrote: > Thanks. The power management line do have only the 'ts' and > 'ttp' flags > ('thermal sensor' and 'thermal trip point') but there is no > 'fid' nor > 'vid' (fid is related to frequency control, and vid for > voltage). > I'm afraid your processors do not support powernow > technology. > Cheers, ___________________________________ NOCC, http://nocc.sourceforge.net