Subject: Re: [linux-audio-dev] audio-disk thread interaction Was: Re: discussion about development overlap
From: Paul Barton-Davis (pbd_AT_Op.Net)
Date: Fri Sep 29 2000 - 15:54:36 EEST
Benno writes:
>I thought the same a few months ago, but after running benchmarks, I
>discovered that one single thread with reasonable read write sizes
>(256KB), is at part or faster than a multithreaded approach when
>reading/writi ng files.
The person who should know the most about this is probably Stephen
Tweedie. When I asked him about this issue, he said that it was really
hard to tell, and that only experiments with a specific disk load
would resolve the issue.
It will be interesting to see how much O_DIRECT behaviour may have on
this issue - its not entirely clear how much of the performance
difference is related to disk scheduling and how much is due to VM
issues with the buffer cache. Alas, O_DIRECT won't be here till 2.5.
--p
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