Re: [PATCH v7 5/5] KVM: selftests: Allowing running dirty_log_perf_test on specific CPUs

Sean Christopherson
2022-10-31T19:49:10Z

On Mon, Oct 31, 2022, Vipin Sharma wrote:
> Add a command line option, -c, to pin vCPUs to physical CPUs (pCPUs),
> i.e. to force vCPUs to run on specific pCPUs.
>
> Requirement to implement this feature came in discussion on the patch
> "Make page tables for eager page splitting NUMA aware"
> https://lore.kernel.org/lkml/YuhPT2drgqL+osLl@google.com/
>
> This feature is useful as it provides a way to analyze performance based
> on the vCPUs and dirty log worker locations, like on the different NUMA
> nodes or on the same NUMA nodes.
>
> To keep things simple, implementation is intentionally very limited,
> either all of the vCPUs will be pinned followed by an optional main
> thread or nothing will be pinned.
>
> Signed-off-by: Vipin Sharma <vipinsh@google.com>
> Suggested-by: David Matlack <dmatlack@google.com>
> ---

Reviewed-by: Sean Christopherson <seanjc@google.com>