Add sub-RFC for interleaving memory allocation#2032
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Alexandr-Konovalov wants to merge 5 commits intomasterfrom
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Add sub-RFC for interleaving memory allocation#2032Alexandr-Konovalov wants to merge 5 commits intomasterfrom
Alexandr-Konovalov wants to merge 5 commits intomasterfrom
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Alexandr-Konovalov
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vossmjp
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| There are two kinds of NUMA-related performance bottlenecks: latency increasing due to | ||
| access to a remote node and bandwidth-limited simultaneous access from different CPUs to | ||
| a single NUMA memory node. A well-known method to mitigate both is random distribution of |
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| a single NUMA memory node. A well-known method to mitigate both is random distribution of | |
| a single NUMA memory node. A well-known method to mitigate both is controlled placement of |
The examples you provide in the next sentence are not "random". So perhaps you mean that you need to do something active to ensure memory placement in done in some thoughtful way. Not sure.
vossmjp
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vossmjp
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Co-authored-by: Mike Voss <[email protected]>
Co-authored-by: Mike Voss <[email protected]>
vossmjp
reviewed
Apr 2, 2026
| One use case for `list of nodes` argument is desire to run parallel activity on subset of | ||
| nodes and so get memory only from those nodes. | ||
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| Most common usage of the allocation function is expected only with `size` parameter. |
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What happens in that case? Is the nodes automatically determined and is by default the full set of numa nodes. Or is the default to use a single node. Similarly with interleaving_step = 0, is the default to automatically select a size, or does this mean allocate on a single numa node?
Co-authored-by: Mike Voss <[email protected]>
Co-authored-by: Mike Voss <[email protected]>
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