Messages in this thread | | | Date | Fri, 24 May 2002 10:59:42 +0200 (CEST) | From | Giuliano Pochini <> | Subject | Re: Poor read performance when sequential write presents |
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>> I did a IO test with one sequential read and one sequential write >> to different files. I expected somewhat similar throughput on read >> and write. But it seemed that the read is blocked until the write >> finishes. After the write process finished, the read process slowly >> picks up the speed. Is Linux buffer cache in favor of write? How >> to tune it? > [...] > 2: Apply http://www.zip.com.au/~akpm/linux/patches/2.4/2.4.19-pre5/read-latency2.patch
Hmmm, someone wrote a patch to fix another related problem: the fact that multiple readers read at a very different speed. It's not unusual that one reader gets stuck until all other have finished. I don't remember who wrote that patch, sorry.
Bye.
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