From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John S. Denker" Subject: Re: sb16 gets wedged when doing overlapped i/o (full duplex) Date: Fri, 06 Dec 2002 09:08:45 -0500 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3DF0AF6D.8060405@monmouth.com> References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------070606050003020803000607" Return-path: In-Reply-To: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: Uros Bizjak Cc: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org This is a multi-part message in MIME format. --------------070606050003020803000607 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Uros Bizjak wrote: > Could you put a printk() in snd_sb16_*_pointer() functions > (sb16_main.c souce)? This printk() should print dma channel and value of > ptr, so we can see when/if DMA channels gets stuck. Done. The result put 2.6 megabytes into /var/log/messages. The head -10 and tail -50 of the relevant section is attached below; if anybody wants more detail the whole shebang is available at http://www.av8n.net/~jsd/alsa/messages.txt > BTW: It looks like another sb16 hardware bug to me. On module re-load, > drivers reset sb16 chip, that is why module reload helps. Plausible.... But note that the cs4239 module gets i/o errors when provoked by the same program, so there may be driver design weaknesses involved, too. > Perhaps you can derive a small test case from your application, which > will help developers to stresstest soundcard and perhaps PCM layer? My program is not super-small, but the relevant passages are simple and easy to find. You can help yourself at http://www.monmouth.com/~jsd/turbid/ Compile the thing and invoke it as ./turbid -F 440 or ./turbid -v -F 440 Note that just for you I added the --snooze option, which will cause it to generate an overrun every seconds (default .5) PROVIDED is not too small. --------------070606050003020803000607 Content-Type: text/plain; name="msgs.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="msgs.txt" Dec 6 06:51:58 moat2 jsd: about to start .... Dec 6 06:52:03 moat2 turbid: PID file "/var/run/turbid.pid" already exists, not overwriting Dec 6 06:52:03 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8 Dec 6 06:52:03 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 4110 Dec 6 06:52:03 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 4894 Dec 6 06:52:03 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 11 Dec 6 06:52:03 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8206 Dec 6 06:52:03 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2055 Dec 6 06:52:03 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2239 Dec 6 06:52:03 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 12302 .... Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4129 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6151 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6176 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 33 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2053 Dec 6 06:57:59 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2081 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4103 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 5861 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6151 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6317 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 7 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 34 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2055 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2081 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4103 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4129 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6151 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6177 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 7 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 242 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2055 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2083 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4103 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 4129 Dec 6 06:58:00 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 6 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 6155 Dec 6 06:58:00 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 7893 Dec 6 06:58:00 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 4210 Dec 6 06:58:00 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 4386 Dec 6 06:58:10 moat2 turbid[4903]: Calout wrote 8820 got -5 Dec 6 06:58:10 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8192 Dec 6 06:58:10 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8192 Dec 6 06:58:10 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 0 Dec 6 06:58:10 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 0 Dec 6 06:58:20 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8192 Dec 6 06:58:20 moat2 turbid[4903]: Calout wrote 8820 got -5 Dec 6 06:58:20 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 0 Dec 6 06:58:30 moat2 turbid[4902]: Read_stuff requested 2048 got -5: Input/output error Dec 6 06:58:30 moat2 turbid[4902]: turbid exiting, status 1 Dec 6 06:58:30 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 0 Dec 6 06:58:49 moat2 jsd: program has exited due to i/o error Dec 6 06:59:10 moat2 jsd: will restart it just for fun Dec 6 06:59:15 moat2 turbid: PID file "/var/run/turbid.pid" already exists, not overwriting Dec 6 06:59:15 moat2 kernel: snd_sb16_capture_pointer dma: 5 ptr: 8 Dec 6 06:59:15 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 11 Dec 6 06:59:25 moat2 turbid[4908]: Read_stuff requested 2048 got -5: Input/output error Dec 6 06:59:25 moat2 turbid[4908]: turbid exiting, status 1 Dec 6 06:59:25 moat2 kernel: snd_sb16_playback_pointer dma: 1 ptr: 2048 Dec 6 06:59:29 moat2 jsd: program has exited due to i/o error --------------070606050003020803000607-- ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf