Stephen John Smoogen <smooge at gmail.com> writes: > On 1 October 2017 at 11:34, hw <hw at adminart.net> wrote: >> Hi, >> >> is there a way in Centos to find out if the Intel turbo mode will be >> used? >> >> Using the 'stress' utility and checking the frequency with cpupower >> tells me that a CPU is running at it´s maximum frequency as reported by >> cpupower --- and this frequency is less than the frequency it would run >> at if it used the turbo mode. All the other CPUs are at their minimum >> frequency. I have verified that turbo mode is enabled in the BIOS. >> >> Is cpupower unable to report frequencies used in turbo mode despite it >> always says it gets its information from the hardware? >> > > It would seem that there are multiple ways to get the information you > are looking for. I expect you have seen this already > > https://haypo.github.io/intel-cpus.html > > but I figured I would pass it on for others. They found that cpupower > is less reliable in how it reports the data because of the values it > gets them from. Thanks, I didn´t see that one yet. At least I noticed that cpupower says that turbo mode is available, and turbostat seems to indicate that CPUs sometimes run at higher frequencies like they would when in turbo mode. It´s strange that there is no tool to definitely figure this out, especially since RH seems to have done a lot of research into improving performance. -- "Didn't work" is an error.