Hi again Is anyone else experiencing freezes due to this? Often with jack, when turning DSP off, Pd hangs and I get the watchdog messages, but no crash, Pd is just frozen. Is there any chance of getting back the old behaviour, that didn't spawn a new thread whenever DSP is turned on?
Roman On Tue, 2012-02-07 at 10:49 +0100, Roman Haefeli wrote: > Hi all > > When employing dynamic patching, in particular when doing dynamic > patching with ~-objects, I found that drop-out time can be greatly > reduced by turning dsp off during dynamic creation time. I used to turn > dsp off and on in 0 logical time a lot in my patches and it never seemed > an issue. > > Recently, I found that when doing so it causes a drop-out, no matter if > there is dynamic patching going on or not. I figured out, that this > happens only when Pd is using jack as the audio back-end. In gdb, I > noticed that when ever I turn dsp off, I get those messages: > > [Thread 0xb3065b70 (LWP 11244) exited] > [Thread 0xb7f60b70 (LWP 11243) exited] > [Thread 0xb7fe1b70 (LWP 11242) exited] > > When turning dsp on again, I get: > > [New Thread 0xb7fe1b70 (LWP 11250)] > [New Thread 0xb7f60b70 (LWP 11251)] > [New Thread 0xb3065b70 (LWP 11252)] > > It seems, that since 0.43 - when using jack - turning dsp off and on > cannot be done "silently" anymore. For me, this has a few implications: > > * I certainly get a drop-out in the audio stream. Starting and stopping > dsp costs a lot of time now. > > * The jack-client 'pure_data_X' disappears when turning dsp off and thus > it looses all hand-made connections to other applications. > > * Often, Pd hangs after a few cycles of turning dsp off/on. Pd-gui > doesn't respond on any input and I see the 'watchdog signaling Pd' > message appearing. > > Personally, I find the old no-thread-spawning-on-dsp-on implementation > much friendlier in many ways, but to me most importantly, it was able to > avoid drop-outs when turning dsp off and on in 0 logical time. > > What do others thing, what is their experience? Is there any chance of > going back to the old way of using Pd with jack? > > BTW: Everything works still nice with ALSA. > > Roman > > _______________________________________________ Pd-dev mailing list [email protected] http://lists.puredata.info/listinfo/pd-dev
