Cpu clockspeed degraded when "isolcpus" and "nohz_full" are used on same CPUs with "intel_pstate" cpufreq driver.
Issue
- Cpu clockspeed degraded when 'isolcpus' and 'nohz_full' are used on same CPUs with 'intel_pstate' cpufreq driver. An example in following snippet.
# grep mhz -i /proc/cpuinfo
cpu MHz : 2299.694
cpu MHz : 1200.988 ---->>>>>
cpu MHz : 2300.335
cpu MHz : 1201.245 ---->>>>>
cpu MHz : 2299.951
cpu MHz : 1281.353 ---->>>>>
cpu MHz : 2299.438
cpu MHz : 2302.642
Environment
- Red Hat Enterprise Linux 7.
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