Messages in this thread | | | Date | Thu, 7 Mar 2002 16:24:49 -0800 (PST) | From | "Randy.Dunlap" <> | Subject | Re: Performance issue on dual Athlon MP |
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On Thu, 7 Mar 2002, Alan Cox wrote:
| > BTW, this doesn't seem like a preemption issue, considering that throughput | > is very definitely affected as well as latency. | > | > Anyway, please let me know if there's anything I can do, within my | > constraints, to help. (As you can guess, though, I don't have any kernel | > debugging experience.) | | It sounds like the hit you are taking is from highmem and I/O (having to | copy pages lower into memory so the I/O subsystem can use them). Some of | that is in the hard to fix for 2.4 category with the x86. There are some | experimental patches around but they are experimental. | -
I don't recall what kernel version you are using..?
Andrea now maintains the block-highmem 2.4 patches. Latest is available at: http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19pre2aa1/ and file: 00_block-highmem-all-18b-5.gz
If you can apply this patch, I'd be interested in the results.
-- ~Randy
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