Pd-list May 2005

pd-list@lists.iem.at

132 participants
218 discussions

about prepend on windows
by nico 03 May '05

03 May '05

hello everybody, i've got a strange behaviour of [prepend] on windows. with this patch : #N canvas 161 188 466 316 10; #X obj 99 14 t a b; #X msg 129 42 set; #X msg 89 119 test; #N canvas 0 0 474 324 pset 0; #X obj 99 14 t a b; #X msg 129 42 set; #X obj 99 -24 inlet; #X obj 88 131 outlet; #X text 95 66 prepend; #X obj 92 99 t b a; #X connect 0 0 4 0; #X connect 0 1 1 0; #X connect 1 0 4 1; #X connect 2 0 0 0; #X connect 4 0 5 0; #X connect 5 0 3 0; #X connect 5 1 3 0; #X restore 183 87 pd pset; #X msg 181 119 test; #X msg 99 -22 test; #X text 96 72 prepend; #X connect 0 1 1 0; #X connect 3 0 4 0; #X connect 5 0 0 0; #X connect 5 0 3 0; at the object creation, the standard object box appears, when i send the test message, the box disappear (only inlet and outlet of prepend stay on the canvas), when i reopen the patch, i've got the error message :prepend could not create (and the box have totally disappear) it's atrange because it works on osx... i use the cvs version of miXed (compiled on osx and windows ) and pd 0.38 and pd 0.37-4 any suggestions???? thanks in advance nicolas

2 5

gem freeze ...
by Tim Blechmann 03 May '05

03 May '05

hi all ... i've got a problem with gem on my machine (ATI Technologies Inc Radeon Mobility M6 LY) with a simple gem patch: |gemhead| | |pix_film| | |pix_texture| | |rectangle| this works fine for some time, but not for long ... the machine freezes (or at least it doesn't respond any more) the specific part of dmesg is: [drm] Initialized drm 1.0.0 20040925 ACPI: PCI Interrupt 0000:01:00.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5 [drm] Initialized radeon 1.16.0 20050311 on minor 0: ATI Technologies Inc Radeon Mobility M6 LY agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0. agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode any idea, what i'm doing wrong? thanks ... tim -- mailto:TimBlechmann@gmx.de ICQ: 96771783 http://www.mokabar.tk latest mp3: kMW.mp3 http://mattin.org/mp3.html latest cd: Goh Lee Kwang & Tim Blechmann: Drone http://www.geocities.com/gohleekwangtimblechmannduo/ After one look at this planet any visitor from outer space would say "I want to see the manager." William S. Burroughs

2 6

[OT] ARTiS: An Asymmetric Real-Time Scheduling
by Marc Lavallée 03 May '05

03 May '05

Very interesting: http://www.lifl.fr/west/artis/ Here's the message sent by Éric Piel to the linux-kernel mailing list: ------------------------- Hello, I'd like to present "ARTiS", a research project that we developed at the LIFL, within the HYADES project. The goal was to provide a system which can be hard real-time and in the same time permit high performance computing. The main idea of our approach is to insert asymmetry into an SMP computer. While the several processors allows us to get HPC, the asymmetry provides real-time capabilities. In order to guarantee that the RT tasks can always be scheduled with a low latency, we forbid _all_ the other tasks to take a lock or disable the preemption on some specified CPUs. Basically, there is a set of "RT CPUs" and a set of "Non-RT CPUs". When a normal task is executed on a RT CPU and happen to call either inc_preempt_count() or __local_irq_save(), then it is automatically migrated to a Non-RT CPU, where the syscall will be continued. Still, the RT CPUs can execute all computation from any task. For more detailed description, please have a look at the research papers available at http://www.lifl.fr/west/artis . So we currently have an implementation for kernel 2.6.11, available on the x86 and IA-64 architectures. It's a proof of concept with rough edges. Even after the code clean-up, I guess some people will scream when looking at the code, it's not the most beautiful one ever done. Nevertheless, it works. When ARTiS is activated your system shouldn't crash more often than usual and tasks scheduled FIFO with priority 99 will get much better latencies than before. The modifications are mostly situated in the scheduler. The migration from an RT CPU to a Non-RT CPU is done asynchronously (there is a special queue which can be read/write without lock). There is also a big part which tries to enhance the load-balancer wrt the RT and to the asymmetry. Following to this email, there will be the core patch as well as the patches for architecture dependent parts (which are rather small). It worth noting that even if ARTiS was designed for SMP systems, it works also on a SMT processor (although it seems that for now it's better not to select the SMT additions to avoid crash). It has been tested on Pentium HyperThreaded. Then ARTiS can be seen more like just a firm (or hard if you have hopes) real-time patch that works with any tasks written for Linux. The latency measurements which have been conducted on a quadri-processor IA-64 give results of scheduling always under 105µs instead of 1200µs for a preemptible kernel. On a Pentium 4 HT, latencies are always under 40µs instead of 14000µs. The measurement tool (realfeel-pfm) that we used is available for both x86 and IA-64 architectures. On the latter one there is an additional measure of the "kernel latency" which is quite interesting too. In addition, a load-balancer evaluator, lbµ is also available. It's completely architecture independent but don't hope too much from it, it just let you always run the same load on the system and collect some statistic. Apart from this, all needs to be done by the user. If you want to try it, have a look first at the documentation available in Documentation/artis.txt . There is also information available on the research project webpage http://www.lifl.fr/west/artis while you can follow the development at this page: https://gna.org/projects/artis . We hope that some people can find interest on this project. Any remark or comment is very welcome, Eric Piel ------------------------------- -- Marc

1 0

GEM: build error FTFont.h
by paris＠parisgraphics.com 03 May '05

03 May '05

hello, i'm trying to build gem from cvs on mac os x. i've gone through the archives and found answers that solved all but one problem. can anyone point me in the right direction to fix these errors? Thanks, paris In file included from src/Base/TextBase.cpp:17: src/Base/TextBase.h:23:20: FTFont.h: No such file or directory In file included from src/Base/TextBase.cpp:17: src/Base/TextBase.h:164: error: syntax error before `*' token src/Base/TextBase.h:169: warning: ISO C++ forbids declaration of `FTFont' with no type src/Base/TextBase.h:169: error: `FTFont' declared as a `virtual' field src/Base/TextBase.h:169: error: parse error before `*' token src/Base/TextBase.cpp: In constructor `TextBase::TextBase(int, t_atom*)': src/Base/TextBase.cpp:42: error: class `TextBase' does not have any field named `m_font' src/Base/TextBase.cpp: In member function `virtual void TextBase::render(GemState*)': src/Base/TextBase.cpp:63: error: `m_font' undeclared (first use this function) src/Base/TextBase.cpp:63: error: (Each undeclared identifier is reported only once for each function it appears in.) src/Base/TextBase.cpp: In member function `virtual void TextBase::fontNameMess(const char*)': src/Base/TextBase.cpp:119: error: `makeFont' undeclared (first use this function) In file included from src/Base/TextBase.cpp:17: src/Base/TextBase.h:23:20: FTFont.h: No such file or directory In file included from src/Base/TextBase.cpp:17: src/Base/TextBase.h:164: error: syntax error before `*' token src/Base/TextBase.h:169: warning: ISO C++ forbids declaration of `FTFont' with no type src/Base/TextBase.h:169: error: `FTFont' declared as a `virtual' field src/Base/TextBase.h:169: error: parse error before `*' token src/Base/TextBase.cpp:42: error: class `TextBase' does not have any field named `m_font' src/Base/TextBase.cpp:63: error: `m_font' undeclared (first use this function) src/Base/TextBase.cpp:63: error: (Each undeclared identifier is reported only once for each function it appears in.) src/Base/TextBase.cpp:119: error: `makeFont' undeclared (first use this function)

6 9

Gem on Fedora again
by Jamie Bullock 03 May '05

03 May '05

Hi, I am currently trying to instal Gem-0.9 on FC3/2.6.10/CCRMA. I have freeglut, freeglut-devel and libGLU installed. I have built the auxlibs ok. Initially the configure script falls over about OpenGL. Changing -Wl, - shared to -shared in the script fixes this. My config line is: ./configure --enable-gltt=NO -- includedir=/usr/include/freetype2/:/usr/local/include/m_pd.h:/usr/include/gltt/ First attempt to make falls over in the Particles dir. Can't find iostream. Adding -I/usr/include/c++/3.3.3/ to the Particles/Makefile fixes this. Then the bits path can't be found. -I/usr/include/c+ +/3.3.3/i386-redhat-linux/ fixes this. Compilation still falls over compiling partlib_system.o: In file included from /usr/include/c++/3.3.3/bits/basic_ios.h:44, from /usr/include/c++/3.3.3/ios:51, from /usr/include/c++/3.3.3/ostream:45, from /usr/include/c++/3.3.3/iostream:45, from partlib_system.cpp:19: /usr/include/c++/3.3.3/bits/locale_facets.h: In constructor `std::numpunct_byname<_CharT>::numpunct_byname(const char*, size_t)': /usr/include/c++/3.3.3/bits/locale_facets.h:696: error: there are no arguments to `_S_create_c_locale' that depend on a template parameter, so a declaration of `_S_create_c_locale' must be available etc. It seems like I have some out of date or missing header files or something, but I'm not sure where to go from here? Jamie

2 2

OSCx number-mangling
by ix＠replic.net 03 May '05

03 May '05

i'm going to echo sentiments from others complaining about '1e05' and other numerical issues. this and other strangeness seems to be tracked down to OSCx. in particular it seems values tagged as floats are arriving as "0". as in this: (this is what OM recieves, and sends out to all its clients (which all update fine, except pd)) Path: /om/synth/set_port_value Arg 0: 'i' 1 Arg 1: 's' "/test/dj_eq_1/latency" Arg 2: 'f' 7.813730 (this is what PD recieves, clearly truncating the value to 0) drip: symbol /om/control_change drip: symbol /test/dj_eq_1/latency drip: 0 any hints? it seems the 'int' type works fine with PD btw..this a 64bit issue maybe? i guess im going to write a OSC implementation for TCL and ditch pd as the 'core' to host my GUI, since the weirdness goes way beyond this, and extends to just abuot anything using a table, or DSP, etc...

2 1

devel 0.38 and segfaults
by Johannes Burström 03 May '05

03 May '05

hi list with a performance coming up in a few days, i'm starting to get desperate in finding the source of the segmentation faults that has been bugging me for a while. i'm trying to run devel 0.38 w/ jack, because of the glitch-free jack support, with the cb scheduler. i have compiled it (for now, stripping of anything that i don't understand) with --enable-jack, --enable-optimize=pentium4, and i'm on agnula/debian. The segfaults usually happen when i'm making or breaking audio connections, with dsp on, and (perhaps related) after i have loaded and are playing back some arrays. I'm sorry i can't be more precise than that. Running the same patches on stable pd (0.38.4) seems to work alright. (but, again, not completely glitch-free... ) Being very much a non-programmer, i feel kind of lost. what should i do to try to spot the error source? does this behaviour sound familiar? thanks for any help, Johannes

2 1

latency for RME Hdsp on Windows
by lalo 03 May '05

03 May '05

Hi guys! i'm trying to deal with latency in my winzoz system with hdsp rme multiface. my latency settings are 128 or 256 samples block..and it works very well in Bidule and other software. in the pd asio panel i can't set the latency lower than 18 ms....if i go 16 ms i get bad crackles. does it mean that my total output latency is 256 sample (around 5 ms at 44100) plus those 18 ms? is anyone with a similar setup able to go lower? thanx lalo -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.0 - Release Date: 29/04/2005

6 7

pd-0.38-4 / kernel 2.6 / scheduling / lockups
by rama 03 May '05

03 May '05

hi PDrs I can't figure out how to avoid PD to freeze when using kernel 2.6 I've just downloaded and compiled pd-0.38-4, and trying to use the compiled externals from previous version (0.38-2), ok, some don't load, but basically all the ones I need, they do. and the point is that very randomly PD freezes with the "watchdog" warn on the console. I saw around some discussions about freezes with pd and kernel 2.6 and heard about the scheduling code from kernel not being so smooth, and -rt as not recommended using 2.6, but I even recompiled the kernel 2.6.11.8 without scheduling as well as without preemptive features. but lockups continue exactly on the same way. I've read a post here from Tom Schouten saying the problem could be solved running X and the window manager, and he posted a link to a "setrt" tool, but I didn't have much success with all this stuff yet. beside those, I read Günter patched the memlock with Tim's code, as the memory seems to be quite different (from Günter's words), and that could solve the -rt flag problem. However I wonder if this fix applies just to the debian package or to the PD source available from Miller's site. note: I'm just using an audio patch, and any kind of video processing in this case. and tried both with and without -rt (should force using -nrt?). last info: seems like the upcoming kernel 2.6.12 will have important fixes to the low latency stuff, and I don't know much more than that, just found it here: http://lalists.stanford.edu/lau/2005/04/0147.html any tips to bring PD to stable in kernel 2.6.x is very welcome. many thx! rama. --

2 3

How use external (like pyext) with PD 0.38-3 for Mac
by Thomas goepfer 02 May '05

02 May '05

Hi, I'm using the last package from Miller (PD 0.38-3 for mac), and I'm lost... How can I specify commands line option with this application ? For Pyext, I know, I must have something like "pd -lib py -path script', but where can I type this ? (it's a standalone application). I'm trying to modify files in the application, but no success... Thomas

2 1

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Pd-list May 2005