[opensuse] opensuse 10.2 cpu info wrong
Folks, I am not sure this is an opensuse 10.2, or motherboard, or bios bug, but when I cat /proc/cpuinfo, I get two different speeds listed for two identical cpus on in my system (look at the listed cpu MHz entries) : more /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 2010.84 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 2010.84 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 2 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 2000.000 cache size : 1024 KB physical id : 1 siblings : 2 core id : 0 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy vahe@homebrew64:~> cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 2010.84 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 2010.84 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 2 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 2000.000 cache size : 1024 KB physical id : 1 siblings : 2 core id : 0 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 4021.69 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 3 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 2000.000 cache size : 1024 KB physical id : 1 siblings : 2 core id : 1 cpu cores : 2 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 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 4021.69 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp Any ideas if this is an issue or I can ignore it? Thanks, Vahe ____________________________________________________________________________________ Catch up on fall's hot new shows on Yahoo! TV. Watch previews, get listings, and more! http://tv.yahoo.com/collections/3658 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Vahe Avedissian
Folks,
I am not sure this is an opensuse 10.2, or motherboard, or bios bug, but when I cat /proc/cpuinfo, I get two different speeds listed for two identical cpus on in my system (look at the listed cpu MHz entries) :
more /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000
That is the frequency the cpu currently runs at. We power down the cpu when it's idle. Give it some more to do and it will increase again. The feature is called cpu frequency scaling, you can control it with the powersave command. Everything is working fine ;-) Andreas -- Andreas Jaeger, Director Platform/openSUSE, aj@suse.de SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg) Maxfeldstr. 5, 90409 Nürnberg, Germany GPG fingerprint = 93A3 365E CE47 B889 DF7F FED1 389A 563C C272 A126
On Sep 26 2007 19:29, Andreas Jaeger wrote:
Vahe Avedissian
writes: Folks,
I am not sure this is an opensuse 10.2, or motherboard, or bios bug, but when I cat /proc/cpuinfo, I get two different speeds listed for two identical cpus on in my system (look at the listed cpu MHz entries) :
more /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 33 model name : Dual Core AMD Opteron(tm) Processor 270 stepping : 2 cpu MHz : 1000.000
That is the frequency the cpu currently runs at. We power down the cpu when it's idle. Give it some more to do and it will increase again.
The feature is called cpu frequency scaling, you can control it with the powersave command.
Everything is working fine ;-)
Is it possible that there is a kernel-level 'race' here while it fetches information for each core? I.e. if frequency is changed due to whatever reason between two successive show_cpuinfo()? [Yes, it looks like] -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Jan Engelhardt
Is it possible that there is a kernel-level 'race' here while it fetches information for each core? I.e. if frequency is changed due to whatever reason between two successive show_cpuinfo()? [Yes, it looks like]
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz, Andreas -- Andreas Jaeger, Director Platform / openSUSE, aj@suse.de SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg) Maxfeldstr. 5, 90409 Nürnberg, Germany GPG fingerprint = 93A3 365E CE47 B889 DF7F FED1 389A 563C C272 A126
On Sep 27 2007 10:02, Andreas Jaeger wrote:
Is it possible that there is a kernel-level 'race' here while it fetches information for each core? I.e. if frequency is changed due to whatever reason between two successive show_cpuinfo()? [Yes, it looks like]
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
Yes, but it may happen that both cores switch frequency (independent of manufacturer) between two calls to show_cpuinfo(). -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Andreas Jaeger wrote:
Jan Engelhardt
writes: <snip>
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
At that speed, one core would be enough for me :)
Andreas
-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Andreas Jaeger schreef:
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
Man, that is faster than the speed of light. :-) -- Jos van Kan registered Linux user #152704 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Jos van Kan wrote:
Andreas Jaeger schreef:
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
Man, that is faster than the speed of light. :-)
What's the speed of dark? ;-) -- Use OpenOffice.org http://www.openoffice.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sep 27 2007 07:20, James Knott wrote:
Jos van Kan wrote:
Andreas Jaeger schreef:
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
Man, that is faster than the speed of light. :-)
What's the speed of dark? ;-)
Obviously, -c. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote:
Jos van Kan wrote:
Andreas Jaeger schreef:
On AMD the cpus can have different speeds - the first core uses 1000 MHz, the seconds 2000 Ghz,
Man, that is faster than the speed of light. :-)
What's the speed of dark? ;-)
-186,000 miles/sec -- David C. Rankin, J.D., P.E. Rankin Law Firm, PLLC 510 Ochiltree Street Nacogdoches, Texas 75961 (936) 715-9333 (936) 715-9339 fax www.rankinlawfirm.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (7)
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Andreas Jaeger
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David C. Rankin
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James Knott
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Jan Engelhardt
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Jos van Kan
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Sylvester Lykkehus
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Vahe Avedissian