RE: [PATCH v6 5/5] KVM: selftests: Allowing running dirty_log_perf_test on specific CPUs

[Wang, Wei W]

On Friday, October 28, 2022 4:03 AM, Vipin Sharma wrote:
> pthread_create() will internally call sched_setaffinity() syscall after creation of a
> thread on a random CPU. So, from the performance side there is not much
> difference between the two approaches.

The main difference I see is that the vcpu could be created on one NUMA node by
default initially and then gets pinned to another NUMA node.

> 
> However, we will still need pin_this_task_to_pcpu()/sched_affinity()
> to move the main thread to a specific pCPU, therefore, I am thinking of keeping
> the current approach unless there is a strong objection to it.

I also don’t have strong objections, and it's up to you for now.
I will re-visit this later after the code consolidation patchset is landed
and see how this could be better consolidated from all user's perspective.