Re: Threaded sort update

[Jim Meyering]

Chen Guo wrote:
> I'm still working on sort, now as a part of a group project in Professor
> Eggert'sclass, and I wanted to show you guys some prelim results.
>
> Tests are conducted on an otherwise free 8 core machine (Xeon X5460,
> 2 dies of 4 cores each). The input file is 1 million lines, 96 MB, and a
> buffer size of 500M is specified.
>
>>From Glen's patch last year, we had elapsed times of
> 1 thread: 5.59 s
> 4 threads: 2.34 s
> 8 threads: 1.94 s
>
> Our results are:
> 1 thread: 5.15 s
> 4 threads: 2.05 s
> 8 threads: 1.65 s
>
> The main speed up in the 1 thread case is because we moved
> output to the top level of merging. At any rate, expect a patch
> submission in a few weeks.

Looking forward to it.
Thanks for persevering!