Red Hat Bugzilla – Bug 1015726
Performance tool user guide - Please document that systems using HPET as a clocksource are slow.
Last modified: 2016-01-19 11:17:44 EST
Description of problem:
Performance tool user guide
Please document that systems using HPET as a clocksource are slow. The performance regression depends on the load and is known to be as high as 25% compared to RHEL6.5. Vendors that want to make their system fast, can fix the TSC clocksource for those systems (either in firmware, or in the kernel).
Please see BZ 971925 for technical details
Comment: this affects mainly RHEL7 and newer releases
yes, you are right, a technical note would be the best fit for this kind of information.
No worries, Jirka, popping this into the tech notes component. :)