Hi Victor, I haven't done it in a long time, but I found an email I posted to the dev list a year and a half ago that has some instructions: http://www.nabble.com/Call-Graph-%28Postscript-file%29-td5730328.html#a5730328 I haven't run it in a long while but those commands that were run there should do the trick. steven On Wed, Apr 16, 2008 at 12:33 PM, victor wrote: > I built csound with useGprof=1, run a simple one-oscillator test, then > tried gprof and got an empty profile. Why is that? > > > ----- Original Message ----- > From: "Steven Yi" > > To: "Michael Gogins" ; "Developer discussions" > > > > Sent: Wednesday, April 16, 2008 7:42 PM > Subject: Re: [Cs-dev] Vectorization > > > > Hi Michael, > > > > I'm interested in the profiling results; what profiler are you using > > by the way? I remember doing profiling a while back using debug > > builds and gprof (the options for that are still in SConstruct), but > > when I did profiling it was more for to try to figure out why the > > Pinkston FM model was really slow at the time, not so much for general > > Csound performance. > > > > I've poked around most of Csound's engine and feel like I know it > > pretty well, especially when I was more actively working on the new > > parser. If there's any questions that arise about Csound internals > > and how things are allocated, I'd suggest looking at the new parser > > (well, the compile part that translates the AST to the INSTRTXT data > > structs that Csound uses at performance time) to see how things are > > built, as to me it's a bit clearer than reading the old parser code. > > > > steven > > > > > > On Wed, Apr 16, 2008 at 11:27 AM, Michael Gogins > > wrote: > >> Yes, this is interesting. I have not yet tried unsafe math optimizations, > >> but will. > >> > >> I have tried inlining as much code as possible, which in practice means > >> defining all C++ member functions in the header file. That consistently > >> produces somewhere between 5% and 15% speedups, right there. > >> > >> This in is the context of intermittently continuing development of > >> Silence, an algorithmic composition/software synthesis library of my own > >> design. Currently, Silence renders audio just slightly faster than > >> Csound, but this is with hard-coded STK Rhodey C++ instruments. (But > >> then, my comparison Csound instrument uses the STK Rhodey opcode also, so > >> the comparison is more fair than it might seem: it mostly compares > >> instrument allocation and event dispatching). Dynamically defined > >> instruments will be slower in Silence, perhaps also in Csound (i.e., > >> using more opcodes in the instr block instead of just calling one opcode > >> that does all the work). I shall soon know more, as I have finalized my > >> design of dynamically defined instruments and unit generators in Silence. > >> > >> It is the usefulness of the profiler in getting this performance that > >> has decided me to profile Csound. I am very curious to see how much > >> "slack" there is, how much scope for performance improvements. Most of > >> Csound's opcodes code looks to be quite efficient, and I am certainly not > >> going to monkey with the fundamental design of the engine, so I am most > >> curious about the efficiency of the engine implementation, especially the > >> kperf loop, event initializers, output drivers, and so on. I don't, > >> actually, expect much slack but the profiler will, perhaps, point out a > >> few areas that have not been completely thought through. > >> > >> Regards, > >> Mike > >> > >> > >> > >> -----Original Message----- > >> >From: Steven Yi > >> >Sent: Apr 16, 2008 12:00 PM > >> >To: Developer discussions > >> >Subject: [Cs-dev] Vectorization > >> > > >> >Hi All, > >> > > >> >There's an interesting thread going on on linux-audio-dev about the > >> >performance of gcc vectorization code: > >> > > >> >http://www.nabble.com/vectorization-td15339532.html#a16720581 > >> > > >> >The thread started in February but resumed a day or two ago, with > >> >someone reporting better results with gcc than using assembly. > >> > > >> >steven > >> > > >> > >> >------------------------------------------------------------------------- > >> >This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > >> >Don't miss this year's exciting event. There's still time to save $100. > >> >Use priority code J8TL2D2. > >> > >> >http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > >> >_______________________________________________ > >> >Csound-devel mailing list > >> >Csound-devel@lists.sourceforge.net > >> >https://lists.sourceforge.net/lists/listinfo/csound-devel > >> > >> > >> > >> > >> ------------------------------------------------------------------------- > >> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > >> Don't miss this year's exciting event. There's still time to save $100. > >> Use priority code J8TL2D2. > >> > >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > >> _______________________________________________ > >> Csound-devel mailing list > >> Csound-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/csound-devel > >> > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > > Don't miss this year's exciting event. There's still time to save $100. > > Use priority code J8TL2D2. > > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > > _______________________________________________ > > Csound-devel mailing list > > Csound-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/csound-devel > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > Csound-devel mailing list > Csound-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Csound-devel mailing list Csound-devel@lists.sourceforge.net