On Mon, 2009-05-04 at 20:17 +0800, Jeff wrote: > Did you no see stalls while playing clip with audio & video using ALSA on > MVL 2.6.18? When I switched to MVL 2.6.18, I found this bug is not fixed.
There is a priority inversion issue with pre-releases version of GStreamer/DSPLink TI gave me. Once I worked around the issue, GStreamer worked fine on DM6446 EVM. On DM355, GStreamer never worked very well for me. For one thing, I play video/audio from NFS. The dm9000 on the DM355 EVM has really bad Ethernet performance (something like 25-28 Mbps with netperf). Not to mention the driver is copying Ethernet data with CPU in the ISR which does not help interrupt latency. > Did you change the source code of MVL 2.6.18? I suspected that it was caused > by EDMA setting. But I am not sure it. There has been some EDMA updates from MVL 2.6.10 to MVL 2.6.18. Audio driver is of course completely redone. However, the dm9000 and video drivers are largely unchanged. Regards, Steve > > BR > Jeff > > -----邮件原件----- > 发件人: Steve Chen [mailto:[email protected]] > 发送时间: 2009年5月4日 19:14 > 收件人: Jeff > 抄送: Davinci-Linux-Source > 主题: Re: about audio driver stalls. > > On Mon, 2009-05-04 at 06:01 -0500, Steve Chen wrote: > > On Mon, 2009-05-04 at 18:34 +0800, Jeff wrote: > > > All, > > > > > > > > > > > > I found there was a serious stalls bug from DAVINCI OSS/ALSA audio > > > driver & EDMA driver. I have asked many times but I have no gotten any > > > news from forum as well as TI support team. Any help is appreciated. > > > > Don't know much about DaVinci OSS, but I tested DaVinci ALSA > > (dm6446/6467/355 and da830) quite extensively and I have not noticed any > > kernel issues. The only issues I noticed is periodic frame/audio pulse > > using GStreamer with MV 2.6.18 kernel. The problem was traced back to > > the application. I used aplay/record, wavplay/rec, sox, and TI's decode > > (which plays audio and video). All seems to work for me. > > Actually, I need to correct myself. GStreamer and TI's decode demo has > some performance issuess on the dm355 EVM. > > > > > > Regards, > > > > Steve > > > > > > > > > > > > > > BR, > > > > > > Jeff > > > > > > > > > > > > > > > _______________________________________________ > > > Davinci-linux-open-source mailing list > > > [email protected] > > > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > > > > _______________________________________________ > > Davinci-linux-open-source mailing list > > [email protected] > > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
