TheSideways
April 17th, 2008, 11:37 AM
Hi,
I've been playing with transcoding lately, but I've been running into some problems with getting it to run multi-threaded.
I've got a P4 3.0G Hyperthreader. Linux sees HT's as two separate procs, and as far as I know or could ever tell it uses them as to seperate procs. When I set the option to have the transcoder use first 2 threads, and I saw that it would only use one of the procs; one would be at about 100%, overall I'd have about 46% idle. (Machine not doing anything else but existing) I've tried fiddling with the number of threads settings, and nothing seems to change it from using one one proc.
So I also looked into mythcommflag. It only uses one proc. I could see this because it was never coded for SMP.. does anyone know if there is an option for mythcommflag and any of the other myth progs to go multi-threaded?
I refrained from grabbing the mythtv source and recompiling it to see if anyone knows a command like option first; so that my mythbuntu box is 'standard' for anything I should try. Oh, I don't have the exact mythtv version numbers, but update manager didn't find anything new as of yesterday.
Thanx,
Tim
I've been playing with transcoding lately, but I've been running into some problems with getting it to run multi-threaded.
I've got a P4 3.0G Hyperthreader. Linux sees HT's as two separate procs, and as far as I know or could ever tell it uses them as to seperate procs. When I set the option to have the transcoder use first 2 threads, and I saw that it would only use one of the procs; one would be at about 100%, overall I'd have about 46% idle. (Machine not doing anything else but existing) I've tried fiddling with the number of threads settings, and nothing seems to change it from using one one proc.
So I also looked into mythcommflag. It only uses one proc. I could see this because it was never coded for SMP.. does anyone know if there is an option for mythcommflag and any of the other myth progs to go multi-threaded?
I refrained from grabbing the mythtv source and recompiling it to see if anyone knows a command like option first; so that my mythbuntu box is 'standard' for anything I should try. Oh, I don't have the exact mythtv version numbers, but update manager didn't find anything new as of yesterday.
Thanx,
Tim