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Having difficulty incraesing enc_mpg_buffers in R5F27

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rando

Post subject: Having difficulty incraesing enc_mpg_buffers in R5F27

Posted: Fri Oct 05, 2007 2:02 pm

Joined: Sat Feb 11, 2006 5:26 pm

Posts: 282

Location: Winnipeg - Canada

I've recently upgraded my motherboard, and am still seeing the same IOBOUND/Application not reading fast enough errors that I was running into several months ago.

I'm attempting to follow the directions listed at the following URL:
http://www.knoppmythwiki.org/index.php? ... imizeHowTo

The place I'm specifically running into an issue is in the "Increase buffer size for IVTV" section. I'm attempting to follow the steps for #4 (R5F20) as it is the newest version listed (though it's not the version I'm running).

I've succesfully placed the extra line of options into my /etc/mythtv/modules/ivtv file, but when I reboot and check for the increased allocation as indicated, I see nothing.

I do see a couple of entries in my syslog that seem to indicate that my mpg buffer size is still at 4mb though.

Code:

root@backend:/var/log# cat syslog | grep MPG
Oct  5 10:04:15 backend kernel: ivtv1: All encoder MPG stream buffers are full. Dropping data.
Oct  5 10:04:16 backend kernel: ivtv1: All encoder MPG stream buffers are full. Dropping data.
Oct  5 10:04:17 backend kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.
Oct  5 10:04:17 backend kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.
Oct  5 10:04:17 backend kernel: ivtv0: All encoder MPG stream buffers are full. Dropping data.
Oct  5 11:10:23 backend kernel: ivtv0: Registered device video0 for encoder MPG (4096 kB)
Oct  5 11:10:23 backend kernel: ivtv1: Registered device video1 for encoder MPG (4096 kB)
Oct  5 11:15:43 backend kernel: ivtv0: Registered device video0 for encoder MPG (4096 kB)
Oct  5 11:15:43 backend kernel: ivtv1: Registered device video1 for encoder MPG (4096 kB)
Oct  5 14:33:21 backend kernel: ivtv0: Registered device video0 for encoder MPG (4096 kB)
Oct  5 14:33:21 backend kernel: ivtv1: Registered device video1 for encoder MPG (4096 kB)
Oct  5 14:42:22 backend kernel: ivtv0: Registered device video0 for encoder MPG (4096 kB)
Oct  5 14:42:22 backend kernel: ivtv1: Registered device video1 for encoder MPG (4096 kB)
Oct  5 14:52:41 backend kernel: ivtv0: Registered device video0 for encoder MPG (4096 kB)
Oct  5 14:52:41 backend kernel: ivtv1: Registered device video1 for encoder MPG (4096 kB)

The last 2 entries in this are the 2 that were made after I had updated the ivtv file to include the extra buffers options.

Has the syntax changed with the current version of IVTV that we are using?

Code:

root@backend:/var/log# cat messages | grep ivtv | grep version
Oct  5 14:52:41 backend kernel: ivtv:  Start initialization, version 1.1.0

I don't know if anyone out there can shed any light on this for me, or at least help point me in the right direction, but i certainly hope so!

P.S. Happy Thanksgiving to any fellow Canucks out there.

_________________
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

Post subject:

Posted: Fri Oct 05, 2007 3:02 pm

Joined: Tue Jan 18, 2005 2:07 am

Posts: 1532

Location: California

Rando, here is what I have in my R5F27 /etc/mythtv/modules/ivtv file

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 enc_ enc_ enc_ enc_
options ivtv enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8
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 can confirm that with R5F27 this does increase the IVTV buffer sizes. Might be useful if you posted exactly what you have in this file.

Marc

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rando

Post subject:

Posted: Fri Oct 05, 2007 3:08 pm

Joined: Sat Feb 11, 2006 5:26 pm

Posts: 282

Location: Winnipeg - Canada

here is my file

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 enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8
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

How is it that you are confirming this increases the buffer size? I'd like to very and confirm for certain that mine is being properly set.

_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)

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gbutters

Post subject:

Posted: Fri Oct 05, 2007 6:15 pm

Joined: Mon May 02, 2005 2:45 am

Posts: 8

rando wrote:

here is my file

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 enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8
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

How is it that you are confirming this increases the buffer size? I'd like to very and confirm for certain that mine is being properly set.

You are missing ivtv form the options line. It should be

options ivtv enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8

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rando

Post subject:

Posted: Fri Oct 05, 2007 9:58 pm

Joined: Sat Feb 11, 2006 5:26 pm

Posts: 282

Location: Winnipeg - Canada

gbutters wrote:

rando wrote:

here is my file

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 enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8
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

How is it that you are confirming this increases the buffer size? I'd like to very and confirm for certain that mine is being properly set.

You are missing ivtv form the options line. It should be

options ivtv enc_yuv_buffers=8 enc_mpg_buffers=32 enc_vbi_buffers=8 enc_pcm_buffers=8

Yes, I sure am. Thank you very much for pointing that out. I'm trying it right now. Fingers are crossed.

I swear I copy/pasted that line form the wiki (which is actually now reflecting R5F27 instead of R5F20 - so it seems someone has corrected this).

_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)

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rando

Post subject:

Posted: Fri Oct 05, 2007 10:28 pm

Joined: Sat Feb 11, 2006 5:26 pm

Posts: 282

Location: Winnipeg - Canada

Perfect! My buffers are now running at 32mb and recording two shows at once and filling my database yields no issues.

Thanks for spotting that gbutters!

_________________
Currently Running:
Too lazy to update this with my current hardware, I'll redo it during my next install =)

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