wine users - Sep 2009 - Getting better perf from multithreaded app

Hello all,
first post here,
I have a multithreaded program that I can't live without. It's a
commercial RAW image conversion program called SilkyPix. It works fine under
Wine, with a few very minor bugs. But one thing nags me: it's oh so slow...

- I have a 64bit quad core with Ubuntu 64. 
- Wine can use the multicore (or so I've read in the FAQ). 
- SilkyPix is also multicore-enabled (it ran very fast using all cores on that
machine when I still had XP on it).
- But when I run SilkyPix in Wine it hardly uses one single processor.
- Indeed the cpufreq daemon hardly ever triggers from its lowest speed, so it
goes 800MHz instead of 2600.
- I/Os stay very low (40Mb per image, one every 10s) so I don't think
it's the issue.

So my question is: how can I get better performance on this one app ? Or does
wine dedicate only one thread per application, even if the app itself is
multithreaded ? XP was 5~10 times faster which is rather important when you need
to process 1000 wedding pictures !

Thank you for clearing this up.

> - Indeed the cpufreq daemon hardly ever triggers from its lowest speed, so
it goes 800MHz instead of 2600.
> 
You could change your power governor to something like ondemand - sounds like
it's set to conservative instead to me. There's also a
"performance" governor which just maxes out CPU clocking.

You can set these power governors using:

Code:
cpufreq-selector -g ondemand



Where you can replace ondemand with anything else, of course.