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All threads of a SMT4 core can either be part of this CPU's l2-cache mask or not related to this CPU l2-cache mask. Use this relation to reduce the number of iterations needed to find all the CPUs that share the same l2-cache. Use a temporary mask to iterate through the CPUs that may share l2_cache mask. Also instead of setting one CPU at a time into cpu_l2_cache_mask, copy the SMT4/sub mask at one shot. Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200921095653.9701-10-srikar@linux.vnet.ibm.com |
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