On my system /proc/cpuinfo contains:-
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping : 6 cpu MHz : 1632.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4897.97 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping : 6 cpu MHz : 1632.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4895.38 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
On my Dell Laptop I quite regularly get lower than the available 2GHz under cpu MHz, it seems to be showing the speed the CPU is running at.
I monitor in Gnome with the CPU Frequency Scaling Monitor - this also allows me to set the speed of the CPUs, or have it run in "OnDemand" or "Performance" mode.
When I have KVM running on one core and compile code across the rest I get the full 2GHz
Jim.
On Thu, 2008-02-28 at 13:09 +0000, Chris G wrote:
On my system /proc/cpuinfo contains:-
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping : 6 cpu MHz : 1632.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4897.97 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping : 6 cpu MHz : 1632.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4895.38 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
On Thu, Feb 28, 2008 at 01:19:37PM +0000, Jim Rippon wrote:
On my Dell Laptop I quite regularly get lower than the available 2GHz under cpu MHz, it seems to be showing the speed the CPU is running at.
That probably explains it, thank you.
I monitor in Gnome with the CPU Frequency Scaling Monitor - this also allows me to set the speed of the CPUs, or have it run in "OnDemand" or "Performance" mode.
Do you have any idea what the "CPU Frequency Scaling Monitor" executable is called? I don't run a Gnome desktop but I do have all of the gnome utilities installed and that sounds like it would be useful.
On Thu, 2008-02-28 at 13:27 +0000, Chris G wrote:
On Thu, Feb 28, 2008 at 01:19:37PM +0000, Jim Rippon wrote:
I monitor in Gnome with the CPU Frequency Scaling Monitor - this also allows me to set the speed of the CPUs, or have it run in "OnDemand" or "Performance" mode.
Do you have any idea what the "CPU Frequency Scaling Monitor" executable is called? I don't run a Gnome desktop but I do have all of the gnome utilities installed and that sounds like it would be useful.
Its "About" lists it as "CPU Frequency Scaling Monitor 2.20.1" on my system, the applet is located here: /usr/libexec/cpufreq-applet
In Gentoo Portage, it is in the gnome-applets package, fedora may package it differently however. It runs within the gnome panel, so if you aren't running one you may find its not for you.
I stumbled across this though which may be useful: http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling
On Thu, Feb 28, 2008 at 02:11:27PM +0000, Jim Rippon wrote:
On Thu, 2008-02-28 at 13:27 +0000, Chris G wrote:
On Thu, Feb 28, 2008 at 01:19:37PM +0000, Jim Rippon wrote:
I monitor in Gnome with the CPU Frequency Scaling Monitor - this also allows me to set the speed of the CPUs, or have it run in "OnDemand" or "Performance" mode.
Do you have any idea what the "CPU Frequency Scaling Monitor" executable is called? I don't run a Gnome desktop but I do have all of the gnome utilities installed and that sounds like it would be useful.
Its "About" lists it as "CPU Frequency Scaling Monitor 2.20.1" on my system, the applet is located here: /usr/libexec/cpufreq-applet
Yes, that's where it is on my system too, thank you.
package it differently however. It runs within the gnome panel, so if you aren't running one you may find its not for you.
I occasionally run gnome-panel, I have it on one of my menus and run it when I need it so it looks as if I should be OK.
On 28 Feb 13:09, Chris G wrote:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
What kernel are you running, and what governor are you using... there's every possibilty that the cpu speed is being dropped when the machine isn't working hard.
On Thu, Feb 28, 2008 at 01:19:54PM +0000, Brett Parker wrote:
On 28 Feb 13:09, Chris G wrote:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
What kernel are you running, and what governor are you using... there's every possibilty that the cpu speed is being dropped when the machine isn't working hard.
2.6.22.9-91.fc7 kernel
governor - what's that? :-)
On 28 Feb 13:23, Chris G wrote:
On Thu, Feb 28, 2008 at 01:19:54PM +0000, Brett Parker wrote:
On 28 Feb 13:09, Chris G wrote:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
What kernel are you running, and what governor are you using... there's every possibilty that the cpu speed is being dropped when the machine isn't working hard.
2.6.22.9-91.fc7 kernel
governor - what's that? :-)
You might be interested in:
brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ondemand brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors userspace powersave ondemand conservative performance brettp@erwin:~$
Cheers,
On Thu, Feb 28, 2008 at 01:28:52PM +0000, Brett Parker wrote:
On 28 Feb 13:23, Chris G wrote:
On Thu, Feb 28, 2008 at 01:19:54PM +0000, Brett Parker wrote:
On 28 Feb 13:09, Chris G wrote:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a 'nominal' CPU speed?
What kernel are you running, and what governor are you using... there's every possibilty that the cpu speed is being dropped when the machine isn't working hard.
2.6.22.9-91.fc7 kernel
governor - what's that? :-)
You might be interested in:
brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ondemand brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors userspace powersave ondemand conservative performance brettp@erwin:~$
Yes! Thank you.....
home$ more scaling_max_freq 2448000 home$ more scaling_min_freq 1632000 home$
Explains all (well, some/most).
On Thu, 28 February, 2008 1:56 pm, Chris G wrote:
On Thu, Feb 28, 2008 at 01:28:52PM +0000, Brett Parker wrote:
On 28 Feb 13:23, Chris G wrote:
On Thu, Feb 28, 2008 at 01:19:54PM +0000, Brett Parker wrote:
On 28 Feb 13:09, Chris G wrote:
Should I be seeing more than that 1632.000 value for cpu MHz or is the nominal 2.40GHz figure for Core 2 Duo 6600 just that a
'nominal'
CPU speed?
What kernel are you running, and what governor are you using...
there's
every possibilty that the cpu speed is being dropped when the
machine
isn't working hard.
2.6.22.9-91.fc7 kernel
governor - what's that? :-)
You might be interested in:
brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ondemand brettp@erwin:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors userspace powersave ondemand conservative performance brettp@erwin:~$
Yes! Thank you.....
home$ more scaling_max_freq 2448000 home$ more scaling_min_freq 1632000 home$Explains all (well, some/most).
Do you have cpuspeed running? If so, you can just switch it off:
/etc/init.d/cpuspeed stop chkconfig cpuspeed off
Cheers.
-Mark
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