On Wed 03 Jun 2015 10:25:59 AM CDT, Roger Oberholtzer wrote:
I have a system (not a laptop) that has an "AMD Phenom(tm) II X6 1100T Processor", as reported in /proc/cpuinfo. I have been monitoring the CPU speed as reported there and I see that quite often the speed is reported as 800 MHz instead of 3300 MHz. For example, I ran the four commands pretty much one after the other. The speed is changing all the time:
roger@acme:~> cat /proc/cpuinfo | grep "cpu MHz" cpu MHz : 3300.000 cpu MHz : 3300.000 cpu MHz : 800.000 cpu MHz : 3300.000 cpu MHz : 3300.000 cpu MHz : 3300.000 roger@acme:~> cat /proc/cpuinfo | grep "cpu MHz" cpu MHz : 800.000 cpu MHz : 3300.000 cpu MHz : 3300.000 cpu MHz : 800.000 cpu MHz : 3300.000 cpu MHz : 3300.000 roger@acme:~> cat /proc/cpuinfo | grep "cpu MHz" cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 3300.000 cpu MHz : 3300.000 roger@acme:~> cat /proc/cpuinfo | grep "cpu MHz" cpu MHz : 800.000 cpu MHz : 2500.000 cpu MHz : 3300.000 cpu MHz : 800.000 cpu MHz : 3300.000 cpu MHz : 3300.000
The system is busy when this is run. So I cannot think there are unused CPUs that are made to slow down because they have nothing to do. Especially changing as often as they seem to be changing.
Is this expected behavior?
Hi Run the command cpupower -c all frequency-info If set to ondemand they will switch as required, it will also provide info on boost states if applicable. If you want to set to max frequency all the time set it to performance. -- Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890) SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.39-47-default up 5 days 14:26, 4 users, load average: 0.20, 0.20, 0.20 CPU AMD A4-5150M APU @ 3.3GHz | GPU Richland Radeon HD 8350G -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org