I was on the train so I had to kill some time :) I tried running jack with buffer size 4k and it worked a lot better, using H4 usb audio. Just one instance dropped jack percentage from ~15%to 1/2 %.
It stopped giving A/D/A sync errors in pd console too. But when I fire the second instance... the CPU just bursts to load the patch and once it run with a lot of buffer glitches and another time it didn't even load and jack got so slow that was zombified. Weird thing is a lot of times, the second instance dies, and jack survives... thus could imply that pd is actually crashing for some odd reason. I should try this in my other Linux too, to see if I can get any meaningful information - so far all I did was blab, sorry. best of luck with this, Pedro p.s: I never got this behaviour with any other pd file, should be interesting to see what others on this list report using your patch. I usually never fire 4 pd instances, but sometimes I use two, on windows I had a stupid habit of using zillions (like 5 or more) instances of pd because I double clicked a file and he always opened a new instance for that =P But never had any trouble. On Wed, Jul 7, 2010 at 1:33 PM, Pedro Lopes <[email protected]> wrote: > Hi Olivier, > > I dont have much time on my hands now, but I tested your patch in my Ubuntu > 9.10 using jack. results: > > 1) I lauched the first one, it took quite a while and CPU bursted as soon > as the patch opened (meaning.. heavy patch :D) > 1.1) I draw and played a sequence, audio is okay. > 2) I launched the second. Major CPU burst, that pdextended went almost to > 90% cpu all the time > 2.1) The audio began to glitch. (but no xruns on jack) > 3) I launched a pdextended just to play test audio sinewave, it launched > fairly quick (of course the CPU was busy with other instances..so not as > quick as usual) and played without glitch. > > I need to test more with more time on my hands, but it seems that its more > related to how heavy the script is rather than the jack setup. But i really > need to test it further, and change jack latency to see if it affects that > much... jack never went past 10% os usage, which is normal for that many > instances (sometimes i use pd and renoise, and it goes much higher). > > My jack setup was: > - rt (I have rt kernel) > - buffer at 512 and 3 period > - using the onboard sound card which is sh*t > - my laptop is also sh*t for nowadays standards (AMD 1.9 Turion X2) > > Best regards, > Pedro > > > > On Wed, Jul 7, 2010 at 1:14 AM, Olivier Baudu <[email protected]>wrote: > >> Hi. >> >> I'm going to try to expose the problems I've met during the last two month >> dealing with the title of my post. >> Sorry if it's confused. >> >> This winter, I used to work on an Ubuntu Hardy, Extended 0.41.4 and with >> the jackd and qjackctl from the official repository (by the way, my sound >> card is a firewire Presonus Firepod). >> I had no problem to use 4 different instances of Pd at the same time using >> jackd as sound server. (and I can precise I didn't need RT-kernel to do what >> I wanted). >> >> I recently change for Ubuntu Lucid. >> So I also change for Pd 0.42.5 (rc4) and the new official jackd and >> qjackctl. >> >> If I use the kernel 2.6.32-23, I can play my patch on one instance, it's >> stable but the sound crunch a little bit sometimes. >> I also can execute my patch on 4 instances, but the sound is awful and 3 >> minutes later, Jack quit. >> >> So I've try the 2.6.31-11-rt. >> In Pd-ext, If I change directly from ALSA to Jack, pd quit. Every time I >> have to change to OSS before to choice Jack and I can't save the jack >> configuration. >> On one instance the sound is perfect and stable. >> It's possible to launch 4 instances without patch and to hear >> simultaneously the 4 tests tones on my sound card using jack. >> But it's impossible to launch even 2 instances with my patch. >> Both quit at the same time when I try to pass from OSS to Jack on the >> second. >> Console message just tell me that GUI of Pd have quited. >> >> My patch is the one you can find on this page : >> http://yamatierea.org/papatchs/squareroom/OSR.htm >> Direct link for the patch : >> http://yamatierea.org/papatchs/squareroom/OSR.zip >> But be careful if you look inside... it's still a little bit fuzzy... >> >> Do you think there is a way to solve my problem ? >> --> Using my patch, simultaneously on 4 instances of Pd-extended using >> Jack on Ubuntu 10.04? >> >> Thank you. >> >> 01ivier >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> > > > -- > Pedro Lopes > contacto: [email protected] > website: http://web.ist.utl.pt/Pedro.Lopes > -- Pedro Lopes contacto: [email protected] website: http://web.ist.utl.pt/Pedro.Lopes
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