Messages in this thread | | | From | Jens Axboe <> | Subject | [PATCH 0/8][RFC] IO latency/throughput fixes | Date | Mon, 6 Apr 2009 14:48:00 +0200 |
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Hi,
This is a set of patches that I worked on today in the hopes of furthering the latency goals and at least fixing some of the write regression with fwrite + fsync that current -git is suffering from.
I haven't done any latency tests yet, I'm just tossing this out there so we can collaborate on improving things. What I did test was the silly fwrite() + fsync() loop test, which is a LOT slower in current -git that it used to be. The test is basically:
while (nr--) { f = fopen(); fprintf(f, "Some data here\n"); fsync(fileno(f)); fclose(f); }
which (for nr == 2000) takes 16 seconds in -git, completes in 0.9s with the patches.
-- Jens Axboe
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