similar to: multithreaded vorbis encoding

I have spent quite some hours in the archives of this mailinglist and read a few threads mainly by Jeff Squyres and Monty about making oggenc multithreaded. Those threads all are dated around January 2001, quite a time ago. For my work experience period I have to implement a parallel (threaded) ogg encoder (If this is possible, of course.) If it can be done, the code will be given back to the

You mean 'cachegrind'? http://valgrind.org/info/tools.html#cachegrind I don't know any public tool better than this (but someone please tell me if I am misinformed). - Daniel On Tue, Sep 1, 2009 at 2:42 PM, Juan Carlos Martinez Santos<juanc.martinez.santos at gmail.com> wrote: > Hello everybody, > > I am looking for a tool (in Linux or Windows) that allow me to get

I read some lines in libvorbis/include/vorbis/codec.h: /* vorbis_block is a single block of data to be processed as part of the analysis/synthesis stream; it belongs to a specific logical bitstream, but is independant from other vorbis_blocks belonging to that logical bitstream. *************************************************/ My question. Does this imply that vorbis_analysis

Hey I am playing with a LOT of threads right now, and I want to know if the threads all need their own little vorbis encoders running in them or what exactly is threadsafe in vorbis? So here are the functions that would be called from many threads of with buffer = vorbis_analysis_buffer( &m_vorbisDsp, 4*DATA_CHUNK_SIZE ); vorbis_analysis_wrote( &m_vorbisDsp, dataLength/dataSize );

Hi, Lately, my oggenc builds (from CVS) haven't been running correctly. In a few debugging sessions, I've found that I'm getting a divide by zero exception. The exception happens in accumulate_fit (floor1.c), line 455: int weight=nb*info->twofitweight/na; Here is the call stack: accumulate_fit floot1_fit mapping0_forward vorbis_analysis oe_encode main The

Monty -- I'm still running into problems with my threaded encoded, and I think I just figured out why. I have N threads running in parallel calling vorbis_analysis_blockout() and vorbis_analysis() to do the number crunching on the input samples. They all share a single vorbis_dsp_state -- my understanding was that this was ok; they only *read* from the vorbis_dsp_state, therefore not

On 10/05/2010 09:42 AM, hamed hamzehi wrote: > Hi > yes, I'm asking for any advice, I want to implement multithreaded code > generator in LLVM. > tnx Hi, this generally depends which kind of code you want to multithread, because generally this is a difficult problem. However, if you limit yourself for the moment to loops that fit into the polyhedral model, you can take

Hi, I have recently implemented encoding/decoding to/from OggVorbis in my app, with the code being based upon the Libvorbisenc sample code supplied with the SDK. It all works very well indeed (encoding from a PCM file, then playback), except that no matter the length of the source PCM file, the last (approx) 4 seconds of audio is always missing from the Ogg file. I am trying to find some

I've been using Samba with OpenLDAP with great success on normal servers. Recently however, it appeared to us that for remote locations it is more economically viable to replace Samba servers with Samba running on little routers like ASUS WL-500g with openwrt firmware/software. It has a broadcom/mipsel CPU, and thanks to openwrt (http://openwrt.org), it is possible to run lots of software

I have a question about the performance of the implementation of the stack protector in LLVM. Consider the following C program: ===== void canary() { char buf[20]; buf[0]++; } int main() { int i; for (i = 0; i < 1000000000; ++i) canary(); return 0; } ===== This should definately run slower when stack protection is enabled, right? I have measured the runtime of

Helps if I send it to the list.... On Tue, Sep 1, 2009 at 5:33 PM, Giridhar S<thisisgiri at gmail.com> wrote: > Oprofile for Linux is a pretty good alternative. > (http://oprofile.sourceforge.net/about/) > > It uses hardware performance counters to collect profiling information > and therefore has very low overhead, whereas Valgrind performs dynamic > binary

Hay! Has anyone come across these errors using valgrind for the oggenc tool or the encoder_example.c: ==13108== Invalid read of size 4 ==13108== at 0x4155734: _vp_offset_and_mix (in /usr/local/lib/libvorbis.so.0.4.1) ==13108==

On 30/3/20 23:17, Ralph Giles wrote: > I'm not aware of any other attempts, and there have never been official > plans. It's difficult to partition input for opus at anything other than > the track level, because of the way the decoder derives its adaptive > state from recently-seen audio. I guess cutting together streams with at > least an 80ms overlap wouldn't glitch

Ketan Pundlik Umare wrote: > Hi Guys, > I am an absolute newbie to the compiler community. I am experimenting a little bit with llvm. > I have a few small questions, i would be really great if someone could help me. It sounds like what you want is valgrind --tool=cachegrind (or --tool=callgrind). See http://valgrind.org/ > 1. Can i find out (is there something already built), if the

Hi yes, I'm asking for any advice, I want to implement multithreaded code generator in LLVM. tnx --- On Tue, 10/5/10, Duncan Sands <baldrick at free.fr> wrote: From: Duncan Sands <baldrick at free.fr> Subject: Re: [LLVMdev] Multithreaded code generation To: llvmdev at cs.uiuc.edu Date: Tuesday, October 5, 2010, 10:50 AM Hi Hamed, > I want to use LLVM to automatically

Hi, In fact I have some theory on instruction level parallelism( i have a partitioning algorithm), then first of all, i want to generate a multithreaded code from LLVM IR (in assembly level) with a given partitioning. My problem is how can i use a thread library(like Pthread) or OS system calls in LLVM IR to create and manage threads? --- On Tue, 10/5/10, Tobias Grosser <grosser at

If you compile this with optimizations, then the 'canary()' function should be totally inlined into the 'main()' function. In that case, the cost of the stack protectors will be very small compared to the loop. -bw On Mar 9, 2012, at 2:52 AM, Job Noorman <jobnoorman at gmail.com> wrote: > I have a question about the performance of the implementation of the stack >

I'm in the process of collecting performance data on my platform and I thought I'd test the difference between double and float performance. So, I replaced all occurances of double in vorbis with float (as was suggested should work). I ended up hanging at: #0 0x0002695c in cacm283 () #1 0x00026dd0 in vorbis_lpc_to_lsp () #2 0x0001b3cc in forward () #3 0x0001cac8 in forward () #4

I'm running into memory leak and read-from/write-to unallocated errors in the cleanup phase of parallel oggenc. I see in vorbis_block_clear() that it references some fields on the vorbis_dsp_state that it cached during vorbis_block_init(), and conditionally does some cleanup based on the values of those fields. Does this fact effectively mean that you can't have multiple vorbis_block

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 <p>Hello, I have encountered a situation where oggenc core dumps. I am using vorbis-tools 1.0 on Solaris 8 x86. This is the command line: oggenc -b 128 -a "Keith, Toby" -t "Losing My Touch" -l "Unleashed" \ - -N "06" -o "Keith, Toby - 06. Losing My Touch.ogg" audio_06.wav Here is a