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SubjectRe: Writeout in recent kernels/VMs poor compared to last -ac
Adam Kropelin wrote:
>
> Thanks for the idea. Unfortunately, it didn't help. :(
>
> Blocks definitely do begin hitting the disk much sooner after I begin the
> transfer, but the overall time is basically unchanged: 7:08. vmstat still
> shows the widely oscillating bo value.

Here's what I get with 2.4.12-ac3-lowlatency (non-fixed X11 driver):
http://www.pp.song.fi/~visitor/latencytest/3x256.html

And here's 2.4.16-lowlatency (non-fixed X11 driver):
http://www.pp.song.fi/~visitor/latencytest2/3x256.html

Here's 2.4.16-lowlatency with some small patches (fixed X11 driver):
http://www.pp.song.fi/~visitor/latencytest3/3x256.html

Here's 2.4.17-ide-rmap-O1-minill (fixed X11 driver):
http://www.pp.song.fi/~visitor/latencytest4/3x256.html


So, only usable kernel is still 2.4.12-ac3 with fixed X11 driver.


- Jussi Laako

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