[Csnd] limit to how many instruments?/ mallocs and segmentation faults abound
| Date | 2014-08-13 11:38 |
| From | Nye Parry |
| Subject | [Csnd] limit to how many instruments?/ mallocs and segmentation faults abound |
Hi All I have been getting segmentation faults and other memory allocation issues when generating large amounts of instrument calls. Is there anything I can do about this?Ive put an example orch (based on Joachim Heinz's tutorial) below with the output I get. The problem varies slightly according to the instruments and whether they are active simultaneously. With the example orch I run into problems at 4494 instances. Up to then it runs fine. (With all instruments starting at 0 its slightly less at 3697 calls) In practice I am only doing about 100 calls from one loop but running the calling instrument many times so I get segmentation faults very quickly. I am running on a mac book pro OSX10.8.5 CSound v. 6.02. The error reports vary and sometimes it complains of an illegal opcode 0 thanks in advance - I can provide more info if necessary <CsoundSynthesizer> <CsOptions> </CsOptions> <CsInstruments> sr = 44100 ksmps = 128 nchnls = 2 0dbfs = 1.0 instr 1 ; master instrument with event pool itimes = 4494 ;number of events to produce icnt = 0 ;counter Slines = "" loop1: ;start of the i-time loop Sline sprintf "i 2 %d 0.5\n", icnt ;new scoreline Slines strcat Slines, Sline ;append to previous scorelines loop_lt icnt, 1, itimes, loop1 ;end of the i-time loop print icnt ; puts Slines, 1 ;print the scorelines scoreline_i Slines ;execute them endin instr 2 endin </CsInstruments> <CsScore> i1 0 10 </CsScore> </CsoundSynthesizer> Last login: Wed Aug 13 11:54:04 on ttys000 wlan-public-223:~ nyesonic$ /var/folders/w0/ts_m5qx17_z7gxcqwwbqmpp80000gn/T/csoundqt_run_script-QQg263.sh ; exit; csound --format=wav:short --env:CSNOSTOP=yes /Users/nyesonic/Projects/ZKM/problemdemo.csd virtual_keyboard real time MIDI plugin for Csound 0dBFS level = 32768.0 Csound version 6.02.0 (double samples) Jan 7 2014 libsndfile-1.0.21 WARNING: could not open library '/Library/Frameworks/CsoundLib64.framework/Versions/6.0/Resources/Opcodes64/libjacko.dylib' (-1) WARNING: could not open library '/Library/Frameworks/CsoundLib64.framework/Versions/6.0/Resources/Opcodes64/libjackTransport.dylib' (-1) WARNING: could not open library '/Library/Frameworks/CsoundLib64.framework/Versions/6.0/Resources/Opcodes64/librtjack.dylib' (-1) UnifiedCSD: /Users/nyesonic/Projects/ZKM/problemdemo.csd STARTING FILE Creating options Creating orchestra Creating score rtaudio: PortAudio module enabled ... using callback interface rtmidi: PortMIDI module enabled Elapsed time at end of orchestra compile: real: 0.002s, CPU: 0.002s sorting score ... ... done Elapsed time at end of score sort: real: 0.002s, CPU: 0.002s Csound version 6.02.0 (double samples) Jan 7 2014 graphics suppressed, ascii substituted 0dBFS level = 1.0 orch now loaded audio buffered in 1024 sample-frame blocks writing 4096-byte blks of shorts to test.wav (WAV) SECTION 1: new alloc for instr 1: instr 1: icnt = 4494.000 B 0.000 .. 10.000 T 9.999 TT 9.999 M: 0.00000 0.00000 Score finished in csoundPerform(). csound(1191,0x7fff79fbf180) malloc: *** error for object 0x1008c5a08: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug Csound tidy up: Abort trap |