On 03/06/12 at 20:59 +0200, Brice Goglin wrote: > Le 03/06/2012 11:40, Lucas Nussbaum a écrit : > > Package: llgal > > Version: 0.13.17-2 > > Severity: wishlist > > > > Hi, > > > > It seems that llgal only runs convert once at a time. In this era of > > multi-core CPUs, it would be great if llgal would run several instances > > of convert concurrently to reduce the image generation time. > > > > Lucas > > > > Hello Lucas, > That would make sense but imagemagick is threaded with OpenMP (and > that's enabled in Debian packages) so we'd need to know when and how > convert uses threads before adding even more pressure on the scheduler. > Brice
Strange. It seems that imagemagick's convert -scale does not use threads on my laptop. I don't see any difference when disabling it with -limit thread 1. $ convert -list resource File Area Memory Map Disk Thread Time ------------------------------------------------------------------------------- 768 16.539GB 7.7015GiB 15.403GiB unlimited 4 unlimited $ time convert -limit thread 4 -scale x700 P1010928.JPG .llgal/scaled_P1010928s.jpg real 0m2.968s user 0m2.752s sys 0m0.196s $ time convert -limit thread 1 -scale x700 P1010928.JPG .llgal/scaled_P1010928s.jpg real 0m2.978s user 0m2.776s sys 0m0.184s Lucas -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
