Re: O(1) scheduler gives big boost to tbench 192

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 7 May 2002 23:44:35 +0100 (BST)

> BEFORE
> ------
> Pipe latency: 6.5185 microseconds
> Pipe bandwidth: 86.35 MB/sec
>
> AFTER
> -----
> Pipe latency: 6.5723 microseconds
> Pipe bandwidth: 540.13 MB/sec
>
> Comments? If anyone would like to see/test the code (pretty simple
> really) let me know.

Are you doing prefetches on the pipe data in your system. Im curious if
this is an SMP cross processor pipe issue or simply cache behaviour ?
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