[gst-devel] GStreamer performance

Lucas Di Pentima lucas at lunix.com.ar
Sun Apr 25 09:59:13 CEST 2004

Hi Martin,

Martin Soto wrote:

> Are you by any chance using kernel 2.6, or a version of 2.4 with recent
> low latency patches? I've seen similar problems in the last days, that
> not even the ALSA developers could explain properly. Not that I have a
> solution to your problem, but I'd really like to know your setup.

No, I'm using 2.4.25 vanilla, it's a Pentium III 500 Mhz with 256 MB 
RAM, an ISA Sound Blaster 16 audio card, and a nvidia TNT2 graphic card.
The Mandrake box is a Celeron 800 Mhz with 128 MB RAM and a onboard 
sound card (don't remember the kernel version, but it's Mandrake's default.)

At first, I thought that the jitter problem were caused by the fact that 
the filesrc and the mad plugins were on the same thread, so I run the 
threaded example, but with the same problem. In fact, if I execute this 
on a terminal:

$ gst-launch filesrc location=/path/to/file.mp3 ! mad ! osssink

I have the same problems. Running "top" while executing gstreamer it 
takes a 7% of the CPU, I tried two different tests, one on high CPU load 
and other with high I/O load with DMA enabled (ls -lR, no more 
complicated than that...) and with both tests, the mp3 
jittered...strange huh? :-/

Maybe I should check the newest version, do you know if there's a .deb 
package that I could use?

Best regards,

Lucas Di Pentima - Santa Fe, Argentina - Jabber ID: lucas at lunix.com.ar
LUNIX: Soluciones en GNU/Linux - http://www.lunix.com.ar
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