Messages in this thread | | | Date | Mon, 27 Jan 2003 23:13:13 -0800 | From | William Lee Irwin III <> | Subject | Re: [PATCH] page coloring for 2.5.59 kernel, version 1 |
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At some point in the past, Jason P. wrote: >> This is yet another holding action, a port of my page coloring patch >> to the 2.5 kernel. This is a minimal port (x86 only) intended to get >> some testing done; once again the algorithm used is the same as in >> previous patches. There are several cleanups and removed 2.4-isms that >> make the code somewhat more compact, though. >> I'll be experimenting with other coloring schemes later this week. >> www.boo.net/~jasonp/page_color-2.5.59-20030127.patch >> Feedback of any sort welcome.
On Mon, Jan 27, 2003 at 10:58:53PM -0800, Martin J. Bligh wrote: > I took a 16-way NUMA-Q (700MHz P3 Xeon's w/2MB L2 cache) and ran some > cpu-intensive benchmarks (kernel compile on warm cache with -j32 and > -j 256, SDET 1 - 128 users, and numaschedbench with 1 to 64 processes, > which is a memory thrasher to test node affinity of memory operations), > and compared to virgin 2.5.59 - no measurable difference on any test.
I think this one really needs to be done with the userspace cache thrashing microbenchmarks. I also have rather serious reservations about the interaction of the qlists with the per-cpu lists.
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