Re: [PATCH] perf: add new option '--workload-attr' to set workload sched_policy/priority/mask

[Adrian Hunter]

On 13/07/23 11:58, Changbin Du wrote:
> To get consistent benchmarking results, sometimes we need to set the
> sched_policy/priority/mask of the workload to reduce system noise.
> 
> For example, CPU binding is required on big.little system.
> 
>   $ perf stat -r 10 -- taskset -c 0 ls
> 
> Nevertheless, the 'taskset' is also counted here.
> 
> To get away of the middleman, this adds a new option '--workload-attr' to
> do the same jobs for stat and record commands.
> 
>   $ sudo perf stat --workload-attr fifo,40,0x1 -- ls
> 
> Above will make 'ls' run on CPU #0 with fifo scheduler and realtime
> priority is 40.

Aren't there ways to set up a process then start perf using -p <pid>
then let the process continue.