sysfs, cpuallocator: topology discovery fixes and improvements. #206
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marquiz
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marquiz
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Implement missing cache discovery bits. Add CPU interface for querying caches. Enable cache discovery by default. Signed-off-by: Krisztian Litkey <krisztian.litkey@intel.com>
Implement DieClusterIDs() and DieClusterCPUSet() for querying
CPU cluster IDs and CPUs per cluster (and per die). There are
two other variants (LogicalDieCluster{IDs,CPUSet}() provided.
These filter out any reported clusters which are hyperthreads
and replace them with a single cluster which contains all the
hyperthreads and has the cluster ID of the lowest CPU.
Signed-off-by: Krisztian Litkey <krisztian.litkey@intel.com>
Clean up a bit detection of online, offline and isolated CPU sets, and add more consistent interface names. Add support for querying possible, and present CPUs as well. Signed-off-by: Krisztian Litkey <krisztian.litkey@intel.com>
Try to satisfy satisfy allocation requests consuming one or more full CPU clusters before falling back to smaller blocks of allocation. Try to squeeze the full allocation into a single die or a single package. Don't attempt any cluster-based allocation if neither of these is possible. Satisfy low-prio allocations using E-core clusters only. Use P-core clusters only to satisfy priority preferences above low-prio. Signed-off-by: Krisztian Litkey <krisztian.litkey@intel.com>
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Notes: this patch series is stacked on top of #294.
This patch series improves hardware topology discovery and CPU allocation. The improvements include: