2008-07-29 02:43:17 ffmpeg run error

zhechong yuan (CHINA)

Message: 59506

I use ffmpeg library in BF531.

The kernel is 2008R1-RC2.

when i run the ffmpeg, some error is below:

//////////////////////////////////////////////

root:/proc> ffmpeg

ffmpeg:561: L1 allocation failed

ffmpeg:582: can't map '/usr/lib/libavcodec.so.51'

ffmpeg:561: L1 allocation failed

ffmpeg:582: can't map '/usr/lib/libavcodec.so.51'

ffmpeg: can't load library 'libavcodec.so.51'

//////////////////////////////////////////////

what's the meaning of 'L1 allocation failed' ?

the /proc/sram is below:

//////////////////////////////////////////

root:/proc> cat sram

--- L1 Scratchpad Size PID State

ffb00000-ffb00008 8 0 ALLOCATED

ffb00008-ffb01000 4088 0 FREE

00000000-00000000 0 0 NULL

--- L1 Instruction Size PID State

ffa09f10-ffa0c000 8432 0 FREE

00000000-00000000 0 0 NULL

///////////////////////////////////////

what can i do for solve the problem?

thanks!

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2008-07-29 02:58:01 Re: ffmpeg run error

Mike Frysinger (UNITED STATES)

Message: 59509

ffmpeg uses L1 data which you dont have ... you'll have to edit the source code in the meantime

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2008-07-29 02:59:32 Re: ffmpeg run error

Yi Li (CHINA)

Message: 59510

BF531 does not L1 BankB data SRAM, while ffmpeg tries to put some data in bank B.

This is a known toolchain bug (and will be fixed in the future), since gcc should report error when compiling.

But if you want to use ffmpeg in BF531, you need to modify ffmpeg code, in "uclinux-dist/lib/ffmpeg/ffmpeg-svn-11114/libavcodec/bfin/", and do not use l1.data.B.

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2008-07-29 03:02:43 Re: ffmpeg run error

Yi Li (CHINA)

Message: 59512

I've add a bug for ffmpeg to track it. Hope ffmpeg can handle the case of BF531 correctly.

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2008-07-29 03:40:56 Re: ffmpeg run error

zhechong yuan (CHINA)

Message: 59515

Li Yi, thanks for your help. i will try it!

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2008-07-29 13:53:19 Re: ffmpeg run error

Cameron Barfield (UNITED STATES)

Message: 59564

I get the same error on a BF536. Is that to be expected?

Edit:

Just found this thread: blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&thread_id=23266&_forum_action=ForumMessageBrowse

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2008-07-29 16:03:38 Re: ffmpeg run error

Robin Getz (UNITED STATES)

Message: 59569

Cameron:

Yes - this is expected. - 536 does not have the same amount of L1 on it.

-Robin

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2008-07-29 23:27:19 Re: ffmpeg run error

zhechong yuan (CHINA)

Message: 59574

i turn off d_cache and modify "l1.data.B" to "1l.data.A", then ffmpeg work all right. anyone have better methord?

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2008-10-21 05:18:45 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 63985

hi, I get the same error, I only change code "l1.data.A" instead of "l1.data.B", but it fails still. how to closed "d_cache"

the document tell me these:

Customise Kernel Settings

Device Drivers

Network Device Support

Ethernet (10 or 100Mbit)

[ ] Use L1 memory for rx/tx packets

but I havn't found the item

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2008-10-21 09:59:04 Re: ffmpeg run error

Robin Getz (UNITED STATES)

Message: 63988

Jun:

What chip are you using? and what version of kernel/uClinux-dist?

-Robin

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2008-10-21 21:38:39 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64004

Robin:

My cpu is BF531, the uclinux version is uClinux-dist-2008R1.5-RC3.

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2008-10-21 22:37:53 Re: ffmpeg run error

Sonic Zhang (CHINA)

Message: 64008

There are too few L1 data SRAM on bf531. You have to disable dcache in kernel and disallow any other drivers to use L1 data cache.

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2008-10-21 22:51:15 Re: ffmpeg run error

Sonic Zhang (CHINA)

Message: 64009

This document is only for bf537/bf548/bf527, not for bf531.

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2008-10-21 22:52:02 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64010

your meaning is : We must turn off all setting about L1 MEMORY , eg:spin, memcpy ..... in kernel setting, but it will be very slow? who have tested ffmpeg speed with bf531?

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2008-10-21 23:01:56 Re: ffmpeg run error

Sonic Zhang (CHINA)

Message: 64011

Current test results are based on bf537. There is a bug about your issue on bf531.

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2008-10-22 02:08:24 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64014

Does ffmpeg have a bug with bf531? how do you know? Could you give me the link? I am testing which close all L1 CATCH in kernel item. when I only close d_catch, it display the same problem with l1 allocation fail!

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2008-10-22 02:18:24 Re: ffmpeg run error

Mike Frysinger (UNITED STATES)

Message: 64016

ffmpeg uses some L1 data. if you dont have any (like the BF531), then you have to modify the source code yourself.

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2008-10-22 02:40:27 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64017

Mike:

BF531 should have 16k L1 Data SRam/Catch, So I think it should have L1.DATA.A, not l1.data.b, if we only modify l1.data.b to l1.data.a, and reduce the l1 data used in kernel, I think it do , right?

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2008-10-22 02:43:50 Re: ffmpeg run error

Mike Frysinger (UNITED STATES)

Message: 64018

there is no dedicated data section. you'd have to turn off dcache in the kernel and i imagine the resulting performance degradation would not justify things.

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2008-10-22 03:18:52 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64020

Mike:

thanks,your meaning is which I must modify ffmpeg code without l1 data, other problem is which I must turn off all sub item s in"blackfin kernel Optimizations"? they are using l1 data.

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2008-10-26 23:55:29 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64212

I have modifyed all l1.data to .data in bfin/*.s, and

#define mL1 .text //#define mL1 .l1.text

#define attribute_l1_text //__attribute__ ((l1_text))

and turn off all sub item s in"blackfin kernel Optimizations", but I have still get the same error message "l1 allocation fail". Should I do more work? Please give me some advice, thanks!

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2008-10-26 23:58:09 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64213

need I turn off "FDPIC" ? I read old FFMPEG code, if we define FDPIC, it will use L1.data, but document say we must turn it on.

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2008-10-27 02:17:08 Re: ffmpeg run error

Mike Frysinger (UNITED STATES)

Message: 64217

if you still get the L1 message, then your binary is still referring to L1. so either you didnt update the sources properly, or you didnt rebuild everything, or ...

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2008-10-27 02:39:23 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64219

I have done these, 1.make clean; 2. make mrproper 3, make menuconfig, 4.make , I am sure I have rebuild everything,

these message can give any useful information? , Should we only modify source file in bfin directory ?

root:/> cd usr/bin/

root:/usr/bin> ffmpeg

ffmpeg:561: L1 allocation failed

ffmpeg:582: can't map '/usr/lib/libavcodec.so.51'

ffmpeg:561: L1 allocation failed

ffmpeg:582: can't map '/usr/lib/libavcodec.so.51'

ffmpeg: can't load library 'libavcodec.so.51'

root:/usr/bin> car /proc/sram

car: not found

root:/usr/bin> cat /proc/sram

--- L1 Scratchpad Size PID State

ffb00000-ffb00008 8 0 ALLOCATED

ffb00008-ffb01000 4088 0 FREE

00000000-00000000 0 0 NULL

--- L1 Instruction Size PID State

ffa0823c-ffa0c000 15812 0 FREE

00000000-00000000 0 0 NULL

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2008-10-27 02:57:50 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64220

Mike:

thanks, ffmpeg have been ok, I forgot to modify "static uint8_t vtmp_blk[256] __attribute__((l1_data_B));" in middle of dsputil_bfin.c

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2008-10-27 05:04:49 Re: ffmpeg run error

Mike Frysinger (UNITED STATES)

Message: 64223

could you post a diff of the changes you've made ? that way if someone else wants to do what you've done, they can grab your patch ...

thanks!

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2008-10-27 23:07:15 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64254

ok, I will test it again with some item ,and commit the difference.

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2008-10-30 02:16:31 Re: ffmpeg run error

Jun Ai (CHINA)

Message: 64393

these file is which I am useing!

bfin.tar.gz

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2009-04-21 10:29:46 Re: ffmpeg run error

Chellouf sabri (FRANCE)

Message: 72994

Hello,

We can avoid all this, by a simple kernel configuration which is indicated in this link :

docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:ffmpeg

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2009-04-21 11:53:00 Re: ffmpeg run error

Robin Getz (UNITED STATES)

Message: 73004

Chellouf:

That has nothing to do with the orginal person's questions - which was about BF531.

Please don't add random comments to old threads.

-Robin

Attachments:

bfin.tar.gz

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2008-07-29 02:43:17 ffmpeg run error