Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7541 discussions

by Juhana Sadeharju

>From: Alfons Adriaensen <fons.adriaensen(a)alcatel.be> > >I don't have your original message with the code at hand here, so >this may be a false alarm. Did you think of making all pointers >into shared memory volatile? IIRC you are testing on a counter >that is incremented by another process - such a small memory access >could easily be optimised away. And that was it!! What braindamaged compiler authors! In the code k = -1; for (;;) { if (k != nums[1]) { k = nums[1]; fprintf(stderr,"%i\n",k); } fprintf(stderr,"g"); } The whole if was apperently optimized away. The code printed only one number and a lot of "g"s. Of the two choises (1) nums[1] is updated elsewhere, (2) it is unnecessary code, coder just tries to be clever, the compiler authors selected the latter. Here is my suggestion to C standard: replace the "volatile" with "goaheadandoptimizetheseawayiwerejustwastingmytimeincodingthese theydonotmeananythingactually". Instead of forcing legitimate coders to write volatile everywhere, those fools who write unnecessary code should be forced to add the proposed qualifier. Juhana

22 years, 7 months

[linux-audio-dev] Re: Unix documentation

by Juhana Sadeharju

>From: Robert Jonsson <robert.jonsson(a)dataductus.se> > >Speaking of documentation, it is generally a good idea to visit all the big >unix vendors for unix-programming enlightment. Well written, fresh, and very >thorough. Not everything is 100% compatible, but close enough. Also Silicon Graphics (www.sgi.com) has many good PDF books. >http://research.microsoft.com/~daniel/unix-haters.html >...for another very nice book, "Unix Haters Handbook" :-)...for some reason >it's hosted by microsoft.... (-B. No, it is not hosted by Microsoft, but we know why they hired him. Juhana

22 years, 7 months

[linux-audio-dev] Re: [ardour-dev] xruns and recording

by Anthony

* Paul Davis <paul(a)linuxaudiosystems.com> [Jul 22 03 18:44]: > >I think there was some talk about xrun handling? What is the > >behaviour of beta2? I'm seeing occasional xruns and then > > > >** CRITICAL **: file gtk-canvas.c: line 1033 (gtk_canvas_item_hide): > > assertion `item != NULL' failed. > > > >while recording. It's not clear to me if the xrun is causing the > >recording to stop or if the xrun is a side effect of some bug. > > > >I've been trying to stress test things. 12 tracks simultaneous > >recording 44.1Khz, 512*2 jack buffer. I've had the above eventually > >happen everytime. CPU usage is < 15%, I wonder if its a disk > >issue. Switching desktops just completely killed ardour while > >recording, normally this is not a problem: > > > >** CRITICAL **: file gtk-canvas.c: line 585 > >(gtk_canvas_item_set_valist): assert > >ion `GTK_CANVAS_IS_CANVAS_ITEM (item)' failed. > > in gdb, do this: > > gdb> br main > gdb> run ... > .. stops at main ... > gdb> br g_logv > gdb> cont > > then backtrace from there. its impossible to track these assertions > otherwise, but very very easy to fix once you do. thanks. > > --p Of course I can't make them happen again. In that session I was doing a lot to try and muck things up - changing zoom, recording overlapping regions...that seems to be in line with canvas problems. I can still make the recording dropout rather easily and receive and xrun, but that seems to answer my question - its seems to be a performance issue trigering something as opposed to the xrun being a result of a bug. I'll try again later. --ant

22 years, 7 months

[linux-audio-dev] i awiat your response

by fredyengeni＠hknet.com

Goodday, My name is Fred Yengeni a south African citizen, I got your Contact through the south African chamber of commece and industry . I am the brother to mr Tony Yengeni . Mr Yengeni was the chairman of parliament's in south Africa and the former chief whip of the ruling political party ANC .My Brother (MR. T. YENGENI), has as a result of trust and Confidence he has mandated that I search for a Reliable and trustworthy foreign> partner, who Will help receive some funds, which we have in cash Totalling US$25.5m (Twenty Five Million five hindred thousand United States Dollars Only) into a personal, company or any Reliable foreign bank account for safe keeping for a Short period of time, since our family bank accounts Within and outside the country have all been Frozen by the authorities. However I have managed to push the money abroad and it is presently in the custody of a financial company in Europe I got your contact through the South African chamber of commerce and industry. I hope you are trustworthy and will not sit on the money when you receive it. The total sum will be shared as follows: 20% for you , 75% For my family ,andthen the remaining 5% will be used for the reimbursement of all the expenses we will incurre in the processof this transaction like your flight ticket to Europe where you will take delivery of the funds , Your hotel accommodation , etc.There is no risk involved what so ever on this transaction, these funds will be received in your favor upon proper application. If you are interested in this business, please urgently contact me on the following e-mail address. Please endeavor to keep this business confidential.I will be most grateful if you can come forward and help me. I would refer you to these few Websites for further information. reply through my alternative email account, yengeni(a)awis.zzn.com About my family) 1) http://news.bbc.co.uk/2/hi/business/2756861.stm 2) http://www.cnn.com/2001/WORLD/europe/10/03/safrica.arms/index.html 3) http://iafrica.com/news/sa/993487.htm 4) http://www.sabcnews.co.za/south_africa/crime1justice/0,1009,55366,00.html Thanks Best regards Mr.Fred Yengeni

22 years, 7 months

[linux-audio-dev] i await your response

by fredyengeni＠hknet.com

22 years, 7 months

[linux-audio-dev] i awiat your response

by fredyengeni＠mail.com

goodday, My name is Fred Yengeni a south African citizen, I got your Contact through the south African chamber of commece and industry . I am the brother to mr Tony Yengeni . Mr Yengeni was the chairman of parliament's in south Africa and the former chief whip of the ruling political party ANC .My Brother (MR. T. YENGENI), has as a result of trust and Confidence he has mandated that I search for a Reliable and trustworthy foreign> partner, who Will help receive some funds, which we have in cash Totalling US$25.5m (Twenty Five Million five hindred thousand United States Dollars Only) into a personal, company or any Reliable foreign bank account for safe keeping for a Short period of time, since our family bank accounts Within and outside the country have all been Frozen by the authorities. However I have managed to push the money abroad and it is presently in the custody of a financial company in Europe I got your contact through the South African chamber of commerce and industry. I hope you are trustworthy and will not sit on the money when you receive it. The total sum will be shared as follows: 20% for you , 75% For my family ,andthen the remaining 5% will be used for the reimbursement of all the expenses we will incurre in the processof this transaction like your flight ticket to Europe where you will take delivery of the funds , Your hotel accommodation , etc.There is no risk involved what so ever on this transaction, these funds will be received in your favor upon proper application. If you are interested in this business, please urgently contact me on the following e-mail address. Please endeavor to keep this business confidential.I will be most grateful if you can come forward and help me. I would refer you to these few Websites for further information. reply through my alternative email account, yengeni(a)awis.zzn.com About my family) 1) http://news.bbc.co.uk/2/hi/business/2756861.stm 2) http://www.cnn.com/2001/WORLD/europe/10/03/safrica.arms/index.html 3) http://iafrica.com/news/sa/993487.htm 4) http://www.sabcnews.co.za/south_africa/crime1justice/0,1009,55366,00.html You can also reach me on this email address fredyengeni(a)mail.com Thanks Best regards Mr.Fred Yengeni

22 years, 7 months

[linux-audio-dev] i awiat your response

by fredyengeni＠mail.com

22 years, 7 months

[linux-audio-dev] Measuring latency on my Apple G3

by Ismael Valladolid Torres

Hi, I am trying latencytest-0.42-png.tar.gz for measuring latency on my Apple G3 (Debian/Sid PowerPC). Of course I am enabling USE_GENERIC_TIMER and tuning my hard disk using hdparam before tests. But, results show a very poor performance. Indeed, any X11 stressing involves a raise of the latency and lots of dropouts. I can't blame hardware. Apple hardware is top-class, and this same machine features under 1,5 ms of latency using CoreAudio on Mac OS X. So, whether the PowerPC kernel or X11 are not fully optimized, or the latencytest application is not reliable on non-Intel platforms. Any ideas? Sorry for crossposting... ;) Regards, Ismael

22 years, 7 months

[linux-audio-dev] ANNOUNCE: BEAST/BSE v0.5.4

by Tim Janik

BEAST/BSE version 0.5.4 is available for download at: ftp://beast.gtk.org/pub/beast/v0.5 or http://beast.gtk.org/beast-ftp/v0.5 BEAST (the Bedevilled Audio SysTem) is a graphical front-end to BSE (the Bedevilled Sound Engine), a library for music composition, audio synthesis, MIDI processing and sample manipulation. The project is hosted at: http://beast.gtk.org This new development series of BEAST comes with a lot of the internals redone, many new GUI features and a sound generation back-end separated from all GUI activities. The most outstanding new features are the track editor which allowes for easy selection of synthesizers or samples as track sources, loop support and unlimited UnDo/ReDo capabilities. Note, the .bse file format hasn't fully stabilized yet, so incompatibilities with future versions may occur, though we're making every possible attempt to maintain backwards compatibility. Overview of Changes in BEAST/BSE 0.5.4: * Ported and improved synthesis module from David A. Bartold: DavSynDrum - Synthetic drum generator * Added support for control event editing * Added per-note velocity and fine-tune editing * Added support for per-track and per-song special effects * Some GUI polishing * Fixes to compile on NetBSD * Miscellaneous bug fixes --- ciaoTJ

22 years, 7 months

[linux-audio-dev] gmorgan

by holborn

Hi! I just upgraded my kernel to 2.6.0 ... and gmorgan runs considerably slow than 2.4.21 .... well in fact not run ... I have a big problem with the system time in gmorgan, i dont know why "eats" lots of user system time. If anyone knows something... please ... help. Josep

22 years, 7 months

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Linux-audio-dev