Re: [PATCH v3 10/29] selftests/resctrl: Exclude shareable bits from schemata in CAT test

Hi Ilpo,

On 12/11/2023 4:18 AM, Ilpo Järvinen wrote:

CAT test doesn't take shareable bits into account, i.e., the test might be sharing cache with some devices (e.g., graphics).

Introduce get_mask_no_shareable() and use it to provision an environment for CAT test where the allocated LLC is isolated better. Excluding shareable_bits may create hole(s) into the cbm_mask, thus add a new helper count_contiguous_bits() to find the longest contiguous set of CBM bits.

create_bit_mask() is needed by an upcoming CAT test rewrite so make it available in resctrl.h right away.

Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com

Reviewed-by: Reinette Chatre reinette.chatre@intel.com

Reinette