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Feature #1288

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Combine all per-cpu shm areas for a channel into a single file

Added by Mathieu Desnoyers almost 4 years ago.

Status:
New
Priority:
Low
Assignee:
-
Target version:
-
Start date:
10/13/2020
Due date:
% Done:

0%

Estimated time:

Description

On the reason for having one shm file per cpu (per channel/per uid/per session): having one file per cpu is mainly done to facilitate NUMA-local memory allocation. That being said, I wonder if as a future improvement we could combine all per-cpu buffers into a single shm file, and issue numa_set_preferred piecewise when mmapping regions of the files. This would lessen the number of file descriptors needed by a significant amount. I suspect it would work, but we'd need to do some prototyping to validate this approach first.

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