Re: [PATCH RFC] x86 / CPU: Add cpu isolation flag for avoiding disturbance from aperfmperf IPI

[Peter Zijlstra]

On Thu, Apr 25, 2019 at 01:46:51PM +0300, Konstantin Khlebnikov wrote:
> Sensitive workloads like DPDK polling do not like any interrupts.
> 
> This patch adds flag 'freq' for boot option 'isolcpu': isolcpu=freq,<cpus>.
> 
> Users like show_cpuinfo() fallback to frequency from generic cpufreq
> policy if arch-specific requesting method returns 0.

Then don't touch that sysfs file?

I really hate having an option for just this.