Messages in this thread | | | Date | Sat, 24 Jun 2017 10:56:40 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH 2/4 v2] x86: use common aperfmperf_khz_on_cpu() to calculate KHz using APERF/MPERF |
| |
On Fri, 23 Jun 2017, Len Brown wrote: > This x86 native method to calculate MHz returns a meaningful result > no matter if P-states are controlled by hardware or firmware > and/or if the Linux cpufreq sub-system is or is-not installed. > > When this routine is invoked more frequently, the measurement > interval becomes shorter. However, the code limits re-computation > to 10ms intervals so that average frequency remains meaningful. > > Discerning users are encouraged to take advantage of > the turbostat(8) utility, which can gracefully handle > concurrent measurement intervals of arbitrary length. > > Signed-off-by: Len Brown <len.brown@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Raphael, please take the whole lot through the cpufreq tree.
Thanks,
tglx
| |