On Tue, May 21, 2013 at 9:48 PM, karthik vm <meetvm@xxxxxxxxx> wrote: > I have few doubts on the DVFS capabilities of my intel Core2Duo > processor (T5750) which has 2 cores (no hyperthreading) and has > Enhanced Intel Speed Step Technology (EIST). When I run the > "cpufreq-info" command in Ubuntu Linux I get the result that: "CPUs > which run at the same hardware frequency: 0 1". Hence I assumed that > both the CPUs will increase and decrease the frequency in a > synchronous fashion. > > But when I tried to verify it by using the below command: > > $ watch -n 0.1 grep \"cpu MHz\" /proc/cpuinfo > > Here I see that each core is varying the frequency individually > contrary to the cpufreq-info commands output that both run at the same > hardware frequency. Hence can anyone comment on this behavior? Which kernel version are you using? Can you paste output of cpufreq-info. You need to look at: "CPUs which need to have their frequency coordinated by software:" to get the right group of cpus.. The other group (pointed by you) had misleading values, which are recently fixed in 3.9. -- 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
