Messages in this thread |  | | Date | Mon, 25 Sep 2000 16:11:34 +0200 | From | Jens Axboe <> | Subject | Re: [patch] vmfixes-2.4.0-test9-B2 |
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On Mon, Sep 25 2000, Andrea Arcangeli wrote: > > And a new elevator was introduced some months ago to solve this. > > And now that I done some benchmark it seems the major optimization consists in > the implementation of the new _ordering_ algorithm in test2, not really from > the removal of the more finegrined latency control (said that I'm not going to > reintroduce the previous latency control, the current one doesn't provide > great latency but it's ok).
Yes, I found this the greatest improvement too.
> As soon I patch my tree with Peter's perfect CSCAN ordering (that only changes > the ordering algorithm), tiotest performance drops significantly in the > 2-thread-reading case. elvtune settings doesn't matter, that's only a matter > of the ordering.
Interesting. I haven't done any serious benching with the CSCAN introduction in elevator_linus, I'll try that too.
-- * Jens Axboe <axboe@suse.de> * SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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