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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

Hi Laura,

yes, you are right, a technical note would be the best fit for this kind of information.

Thank you
Jirka

No worries, Jirka, popping this into the tech notes component. :)