Scott C. Frase wrote: > On Thu, 2007-12-27 at 11:45 -0600, Timothy Baldridge wrote: >> Your disk performance may be holding you back as well. On the oil >> effect, you are CPU bound, on a faster effect (e.g. grayscale) you >> will be primarily IO bound. Here's an example. Only recently (in the >> past 3 years) has Discreet moved to x86. Before that they were selling >> their highest end product (for editing 4K film) on a quad CPU 1Ghz. >> But they smoked the competition when it came to performance. Why? Most >> of the time these systems had a 10-30 fibre channel RAID behind them. >> This allowed the Tezro and Onyx3 systems to edit 5 streams of >> real-time 4k video on a system that had basically no number crunching >> power. 9 times out of 10 you will be limited by your disk performance, >> not the CPU. >> >> I would suggest running a bonnie++ benchmark on your disks, from there >> you can calculate an approximate max fps processing rate for the >> disks. >> >> Timothy > Hi Timothy, > Thanks for the thought. I have been monitoring wait i/o via mpstat and > it doesn't seem to be the issue. Here's recent output of mpstat using a > bunch of effects on a HDV video render, including oil painting. The > sixth column is iowait: > > 01:15:45 PM CPU %user %nice %sys %iowait %irq %soft %steal > %idle intr/s > 01:15:55 PM 0 87.30 0.00 0.60 0.00 0.00 0.30 0.00 > 11.80 150.20 > 01:15:55 PM 1 87.40 0.00 0.70 0.00 0.00 0.00 0.00 > 11.90 127.90 > 01:15:55 PM 2 86.70 0.00 0.40 0.20 0.00 0.30 0.00 > 12.40 150.20 > 01:15:55 PM 3 87.71 0.00 0.30 0.00 0.00 0.00 0.00 > 11.99 128.00 > 01:15:55 PM 4 87.40 0.00 0.40 0.00 0.00 0.00 0.00 > 12.20 134.30 > 01:15:55 PM 5 87.10 0.00 0.60 0.00 0.00 0.00 0.00 > 12.30 128.00 > 01:15:55 PM 6 86.70 0.00 0.10 0.00 0.00 0.00 0.00 > 13.20 134.10 > 01:15:55 PM 7 86.80 0.00 0.20 0.00 0.00 0.00 0.00 > 13.00 128.50 > > > Notice that iowait is zero. I do have a couple of RAID 0 filesystems, > one based on software RAID and the other hardware. > > scott
Cinelerra has some race problems between threads which let them wait on each other doing nothing, this is hard to fix unfortunally. But generally I think adding more CPU's will add some performance improvement. While in doubt, you may better opt for more ram (4 or more GB of ram). For long time future I we will fix this (with what is called cinelerra 3 now) to have no races and utilize multi cpu systems much bettter, but don't hold your breath yet for that. Christian > > > _______________________________________________ > Cinelerra mailing list > Cinelerra@skolelinux.no > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra