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? -- "Didn't work" is an error.
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.> > -- > "Didn't work" is an error. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos-- Stephen J Smoogen.
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.