Hi Phil, just to keep this in people's minds... I have exact same problem described in these emails with my Particle Chamber granular synthesis patch. It has 32 "switch~ed" voices. Using one instance seems to be OK, but two or more leads to exponentially-growing CPU usage that eventually makes PD unresponsive to the GUI (and eventually would probably crash PD if I let it go on...) I guess this could relate to the "isn't the GUI supposed to have lower priority than process?" thread, since this particular problem makes PD a bit unusable for the kind of performances I want to be doing with it. The fact that PD lacks a usable voice-allocation method (i.e. CPU resources can be allocated and de-allocated to a voice, something which switch~ has a bug with, and which Nqpoly~ and so on does not do at all) means that I must start looking into SuperCollider to work with my polyphonic granular synthesis stuff. Sad but true...
d. Phil Stone wrote: > Hi, > > I'm getting a slow-but-steady climbing CPU when running some synthesis > patches. I (like the poster below) have sub-modules that can be > switch~ed on and off. An archive search turned up the following > un-replied post: >> Hi all >> >> Okay. I'm stumped. >> >> Recently, I've noticed that my cpu meter has been steadily rising. I >> think I may have found the culprit. >> >> A while back I thought I'd put a power switch (just a switch~ object) >> on my poor-man's granular delay line, as my performance patches are >> getting a bit bulky. >> >> Try this (if you have the time): >> >> http://www.sideshowmedia.ca/cputest.zip >> >> cputest.pd: (needs expr, but I think that's all) >> >> 1. turn on audio in pd, but leave the power (p toggle) in "lois" >> off. Watch the cpu meter climb (over a period of 5 minutes or so - >> the toggle prints the cputime every 10 seconds). On my computer (G4 >> Powerbook, HCS extended 0.38.4) it starts around 5% and hits 10% >> after 5 minutes. >> >> 2. Do the same with "lois" on. For me, cpu hovers around 13-14%. No >> increase. >> >> 3. Repeat step 1. After 10-15 minutes, cputime is higher than with >> "lois" on. Switch "lois" on, and cpu drops. Huh? >> >> I have no idea what's going on, but am I missing something >> important? Thanks in advance. >> >> cheers >> dafydd >> > > Does anybody have any insight on this? I don't remember this happening > until fairly recently, but don't know if it dates to when I started > switch~ing modules. I'm currently running 0.39.2-extended RC1 on a > MacBook Pro. > > > Phil Stone > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > -- derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista ---Oblique Strategy # 109: "Lost in useless territory" _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
