Messages in this thread | | | Date | Tue, 02 Nov 2004 07:46:59 -0800 | From | "Martin J. Bligh" <> | Subject | Re: [PATCH] Use MPOL_INTERLEAVE for tmpfs files |
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> This patch causes memory allocation for tmpfs files to be distributed > evenly across NUMA machines. In most circumstances today, tmpfs files > will be allocated on the same node as the task writing to the file. > In many cases, particularly when large files are created, or a large > number of files are created by a single task, this leads to a severe > imbalance in free memory amongst nodes. This patch corrects that > situation.
Yeah, but it also ruins your locality of reference (in a NUMA sense). Not convinced that's a good idea. You're guaranteeing universally consistent worse-case performance for everyone. And you're only looking at a situation where there's one allocator on the system, and that's imbalanced.
You WANT your data to be local. That's the whole idea.
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