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sgunther
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 Posted: Wed Feb 14, 2007 1:31 pm |
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Joined: Thu Apr 27, 2006 1:07 am
Posts: 54
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How is it working for you with just a mpeg buffer change? Do you still have any recent kernal msgs in; Code: tail -n30 /var/log/kern.log
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rando
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Posted: Wed Feb 14, 2007 1:35 pm |
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location:
Winnipeg - Canada
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I haven't looked there lately......
Code: cat /var/log/messages | grep application brings back a nice clean report though..... I'll go check my kern.log Code: root@backend:~# tail -n30 /var/log/kern.log
Feb 12 16:50:35 backend last message repeated 97 times
Feb 12 16:51:35 backend last message repeated 100 times
Feb 12 16:52:35 backend last message repeated 103 times
Feb 12 16:53:35 backend last message repeated 96 times
Feb 12 16:54:35 backend last message repeated 93 times
Feb 12 16:55:35 backend last message repeated 93 times
Feb 12 16:56:35 backend last message repeated 93 times
Feb 12 16:57:36 backend last message repeated 90 times
Feb 12 16:58:35 backend last message repeated 95 times
Feb 12 16:59:35 backend last message repeated 98 times
Feb 12 17:00:35 backend last message repeated 94 times
Feb 12 17:01:36 backend last message repeated 98 times
Feb 12 17:02:36 backend last message repeated 103 times
Feb 12 17:03:36 backend last message repeated 98 times
Feb 12 17:04:36 backend last message repeated 98 times
Feb 12 17:05:36 backend last message repeated 94 times
Feb 12 17:06:36 backend last message repeated 99 times
Feb 12 17:07:36 backend last message repeated 104 times
Feb 12 17:08:36 backend last message repeated 98 times
Feb 12 17:09:36 backend last message repeated 98 times
Feb 12 17:10:36 backend last message repeated 91 times
Feb 12 17:11:36 backend last message repeated 89 times
Feb 12 17:12:37 backend last message repeated 88 times
Feb 12 17:13:37 backend last message repeated 88 times
Feb 12 17:14:37 backend last message repeated 88 times
Feb 12 17:15:37 backend last message repeated 87 times
Feb 12 17:16:37 backend last message repeated 86 times
Feb 12 17:17:37 backend last message repeated 87 times
Feb 12 17:18:27 backend last message repeated 73 times
Feb 12 17:19:43 backend kernel: cdrom: This disc doesn't have any tracks I rec ognize!
root@backend:~#
I guess that's good?
_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)
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sgunther
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Posted: Wed Feb 14, 2007 1:42 pm |
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Joined: Thu Apr 27, 2006 1:07 am
Posts: 54
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Looks good! Can you give the exact buffer mod you used? Was it only? Code: options ivtv mpg_buffers=32
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rando
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Posted: Wed Feb 14, 2007 1:45 pm |
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location:
Winnipeg - Canada
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Here is my /etc/mythtv/modules/ivtv
Code: alias char-major-81 videodev
alias char-major-61 lirc_i2c
#options ivtv debug=1
#options tuner type=2
options msp3400 once=1
options ivtv yuv_buffers=4 mpg_buffers=16 vbi_buffers=4 pcm_buffers=4
install ivtv /sbin/modprobe tuner; /sbin/modprobe msp3400; /sbin/modprobe saa7115; /sbin/modprobe --ignore-install ivtv
remove ivtv /sbin/modprobe -r --ignore-remove ivtv && /sbin/modprobe -r saa7115 && /sbin/modprobe -r msp3400 && /sbin/modprobe -r tuner
I went with 16mb buffers rather than 32, and things seem to be running fine so far. Anybody know how much I can assign there (assuming I run into issues down the road, can I put say 48 or 64 in there? I don't anticipate I'd need that big of a buffer.....but I'm curious)
_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)
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sgunther
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Posted: Wed Feb 14, 2007 1:51 pm |
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Joined: Thu Apr 27, 2006 1:07 am
Posts: 54
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I believe the upper limit is driven by installed system memory.
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rando
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Posted: Wed Feb 14, 2007 2:00 pm |
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Joined: Sat Feb 11, 2006 5:26 pm
Posts: 282
Location:
Winnipeg - Canada
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Yay
I think i have open ram slots......
_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)
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marc.aronson
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Posted: Thu Mar 15, 2007 12:45 am |
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Joined: Tue Jan 18, 2005 2:07 am
Posts: 1532
Location:
California
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I am seeing the occasion "/etc/mythtv/modules/ivtv " message in kern.log, so I made the changes suggested above to increase my buffers to 16MB. When i reboot kern.log contains the following:
Code: Mar 14 23:42:48 mythhd kernel: ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
Mar 14 23:42:48 mythhd kernel: ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
Mar 14 23:42:48 mythhd kernel: ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
Mar 14 23:42:48 mythhd kernel: ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total)
So it looks like my buffer is still on 4MB, not 16MB as expected. I'm running R5D1 w/ IVTV 0.7.1. Any thoughts on why I'm not seeing the increased buffer allocation? My system has 1GB of RAM, so I should have plenty of space for this...
Marc
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marc.aronson
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Posted: Thu Mar 15, 2007 7:56 am |
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Joined: Tue Jan 18, 2005 2:07 am
Posts: 1532
Location:
California
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I put the change in the file /etc/modprobe.conf, rebooted and kern.log now shows that the requested buffer sizes have been allocated.
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