[igt-dev] [PATCH igt] igt/perf_pmu: Skip hotplugging cpu0

[Tvrtko Ursulin]

On 13/02/2018 16:05, Chris Wilson wrote:
> It is a known issue that some "commodity" machines fail when asked to
> hotplug CPU0, so don't.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> --
> Tvrtko, is it just this simple? Or do we need to avoid the physical
> package?

Problem is it makes the test pointless since it is never able to kick 
the PMU off CPU0.

Regards,

Tvrtko

> -Chris
> ---
>   tests/perf_pmu.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
> index a7501ca5..e9ce2881 100644
> --- a/tests/perf_pmu.c
> +++ b/tests/perf_pmu.c
> @@ -982,7 +982,7 @@ static void cpu_hotplug(int gem_fd)
>   	 * this has not affected busyness stats in the parent.
>   	 */
>   	igt_fork(child, 1) {
> -		int cpu = 0;
> +		int cpu = 1;
>   
>   		close(link[0]);
>   
>