Re: [PATCH] MAX_READAHEAD gives doubled throuput

Daniel Phillips
2001-07-28T02:03:49Z

On Saturday 28 July 2001 03:40, Roger Larsson wrote:
> Hi all,
>
> Got wondering why simultaneous streaming is so much slower than
> normal...
>
> Are there any reasons nowadays why we should not attempt to read
> ahead more than 31 pages at once?
>
> 31 pages equals 0.1 MB, it is read from the HD in 4 ms => very close
> to the average access times. Resulting in a maximum of half the
> possible speed.
>
> With this patch copy and diff throughput are increased from 14
> respective 11 MB/s to 27 and 28 !!!

Wheeeeee! Out of interest, what are the numbers for 2.4.7 vs
2.4.8-pre1 ?

--
Daniel