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> Mplayer Development And Optimization For Arm
Serge
post Dec 5 2006, 02:43 PM
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Probably it is a good idea to consolidate efforts and try to submit some of the useful ARM related patches upstream:
http://lists.mplayerhq.hu/pipermail/ffmpeg...ust/014460.html
http://lists.mplayerhq.hu/pipermail/mplaye...ber/046207.html

I can only test MPlayer on Nokia 770, so can't be sure if any ARM9E (that's the core used in Nokia 770) specific optimizations are also good for Zaurus. So people who are able to compile MPlayer from sources and test it on zaurus are welcome in this thread. One of the examples is the new armv5te optimized idct in MPlayer 1.0rc1, can anybody benchmark it on Zaurus?

Also this is not quite ARM architecture related, but libmad based decoder in MPlayer seems to have troubles with variable bitrate audio (it loses sync with video). Some more details can be found here http://lists.mplayerhq.hu/pipermail/mplaye...ust/045017.html and in the followup messages. Any volunteer to investigate this problem?

All in all, ffmpeg optimizations for ARM are not nearly as good as for x86, so investing some time in it may provide some performance improvement.
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tjchick
post Mar 14 2007, 07:39 AM
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Hmm. It looks like the mplayer 1.0rc1 code includes iwmmxt stuff, but does not actually use it unless you change the code. I have done this for the results below.

Here are my benchmark results on a standard Sl-C3200, not overclocked, running open zaurus:

BENCHMARKs: VC: 44.056s VO: 0.078s A: 0.000s Sys: 0.831s = 44.965s
BENCHMARK%: VC: 97.9787% VO: 0.1734% A: 0.0000% Sys: 1.8479% = 100.0000%
BENCHMARKs: VC: 43.234s VO: 0.079s A: 0.000s Sys: 0.816s = 44.128s
BENCHMARK%: VC: 97.9734% VO: 0.1785% A: 0.0000% Sys: 1.8481% = 100.0000%
BENCHMARKs: VC: 43.487s VO: 0.076s A: 0.000s Sys: 0.813s = 44.376s
BENCHMARK%: VC: 97.9957% VO: 0.1715% A: 0.0000% Sys: 1.8328% = 100.0000%
BENCHMARKs: VC: 43.669s VO: 0.076s A: 0.000s Sys: 0.820s = 44.565s
BENCHMARK%: VC: 97.9891% VO: 0.1712% A: 0.0000% Sys: 1.8398% = 100.0000%
BENCHMARKs: VC: 43.497s VO: 0.078s A: 0.000s Sys: 0.810s = 44.386s
BENCHMARK%: VC: 97.9976% VO: 0.1764% A: 0.0000% Sys: 1.8260% = 100.0000%

Tim
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Serge
post Mar 14 2007, 08:14 AM
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QUOTE(tjchick @ Mar 14 2007, 07:39 AM)
Hmm. It looks like the mplayer 1.0rc1 code includes iwmmxt stuff, but does not actually use it unless you change the code.

Do you really need to change the code to use iwmmx? Isn't it a simple matter of properly running configure?

Did you try using something similar to what I suggested in this thread before?
CFLAGS="-O4 -mcpu=iwmmxt -fomit-frame-pointer -ffast-math" ./configure
make
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tjchick
post Mar 14 2007, 08:29 AM
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QUOTE(Serge @ Mar 14 2007, 05:14 PM)
QUOTE(tjchick @ Mar 14 2007, 07:39 AM)
Hmm. It looks like the mplayer 1.0rc1 code includes iwmmxt stuff, but does not actually use it unless you change the code.

Do you really need to change the code to use iwmmx? Isn't it a simple matter of properly running configure?

Did you try using something similar to what I suggested in this thread before?
CFLAGS="-O4 -mcpu=iwmmxt -fomit-frame-pointer -ffast-math" ./configure
make
*



Yes, you really do - the code gets compiled, but not used, as the code is only installed following a test like this:
if( mm_flags & MM_IWMMXT ) -> install dsp code.

It fills in mm_flags wih 0! There is some code to overide this using avctx->dsp_mask & FF_MM_FORCE, but I did not look too hard at getting this going. I wonder if this is related to the lavdopts somehow?

That's why the others only saw a 2% improvment (compiling with the better tune options), and I see a 30% or so improvement.

Tim
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Meanie
post Mar 14 2007, 08:53 AM
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QUOTE(tjchick @ Mar 15 2007, 02:29 AM)
QUOTE(Serge @ Mar 14 2007, 05:14 PM)
QUOTE(tjchick @ Mar 14 2007, 07:39 AM)
Hmm. It looks like the mplayer 1.0rc1 code includes iwmmxt stuff, but does not actually use it unless you change the code.

Do you really need to change the code to use iwmmx? Isn't it a simple matter of properly running configure?

Did you try using something similar to what I suggested in this thread before?
CFLAGS="-O4 -mcpu=iwmmxt -fomit-frame-pointer -ffast-math" ./configure
make
*



Yes, you really do - the code gets compiled, but not used, as the code is only installed following a test like this:
if( mm_flags & MM_IWMMXT ) -> install dsp code.

It fills in mm_flags wih 0! There is some code to overide this using avctx->dsp_mask & FF_MM_FORCE, but I did not look too hard at getting this going. I wonder if this is related to the lavdopts somehow?

That's why the others only saw a 2% improvment (compiling with the better tune options), and I see a 30% or so improvement.

Tim
*



if you pull latest source from svn, you can just use --enable-iwmmxt
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Posts in this topic
Serge   Mplayer Development And Optimization For Arm   Dec 5 2006, 02:43 PM
washo   I second that a better player would be great Im a ...   Dec 6 2006, 09:14 AM
ldrolez   Hi! Check atty sources, 99% of mplayer for the...   Dec 7 2006, 09:34 AM
koen   QUOTE(ldrolez @ Dec 7 2006, 05:34 PM)Hi! ...   Dec 7 2006, 09:53 AM
Antikx   QUOTE(koen @ Dec 7 2006, 11:53 AM)mpeg-video ...   Dec 7 2006, 10:54 AM
Serge   QUOTE(ldrolez @ Dec 7 2006, 09:34 AM)Check at...   Dec 7 2006, 11:06 AM
koen   QUOTE(Serge @ Dec 7 2006, 07:06 PM)The check ...   Dec 7 2006, 02:29 PM
danboid   I'm very happy to learn that the ARM specific ...   Dec 7 2006, 02:45 PM
Serge   QUOTE(danboid @ Dec 7 2006, 02:45 PM)I'm ...   Dec 11 2006, 12:30 PM
Serge   Just to keep you informed, the work on implementin...   Dec 25 2006, 02:30 AM
koen   QUOTE(Serge @ Dec 25 2006, 10:30 AM)By the wa...   Dec 25 2006, 04:16 AM
koen   QUOTE(koen @ Dec 25 2006, 12:16 PM)The cxxx m...   Dec 25 2006, 05:38 AM
Serge   QUOTE(koen @ Dec 25 2006, 04:16 AM)The cxxx m...   Dec 31 2006, 12:40 PM
Serge   Some information about mplayer benchmarking. It co...   Dec 26 2006, 03:53 PM
danboid   Hi Serge! I conducted a bunch of benchmark te...   Dec 27 2006, 12:36 AM
koen   I ran the benchmark on my ipaq h2200 (400MHz pxa25...   Dec 27 2006, 01:27 AM
Serge   Thanks for running benchmarks. They show that thes...   Dec 27 2006, 02:16 PM
danboid   Hi Serge! I'm willing to do some more ben...   Jan 1 2007, 12:29 AM
Civil   QUOTECFLAGS="-O4 -mcpu=iwmmxt -fomit-frame-po...   Jan 1 2007, 02:24 AM
Serge   civil: http://www.hpc.ru/board/viewtopic.php?t=990...   Jan 1 2007, 03:00 AM
danboid   Yeah Civil, be civil (Sorry, couldn't resist ...   Jan 1 2007, 03:29 AM
Civil   Serge It was just comments... I don't know eng...   Jan 1 2007, 03:47 AM
Serge   Done some patch for 'dct_unquantize_h263_intra...   Jan 1 2007, 06:37 PM
Serge   OK, committed 'dct_unquantize_h263_intra' ...   Jan 2 2007, 09:32 AM
Serge   Well, some more optimizations for h263 unquantizer...   Jan 6 2007, 08:24 AM
Serge   Just for additional statistics, 'Doom benchmar...   Jan 8 2007, 02:29 PM
Serge   Hello again. I guess the benchmarks of -Os vs. -O2...   Jan 17 2007, 03:37 PM
Meanie   QUOTE(Serge @ Jan 18 2007, 09:37 AM)Hello aga...   Jan 17 2007, 04:40 PM
Serge   Here is a new progress update report I have imple...   Jan 22 2007, 02:30 PM
lardman   Serge, I'll build your comparison benchmarks ...   Jan 22 2007, 02:55 PM
Civil   QUOTEDo you need any assistance in benchmarking? I...   Jan 28 2007, 11:58 AM
Serge   QUOTE(Civil @ Jan 28 2007, 11:58 AM)P.S. mpla...   Jan 28 2007, 12:53 PM
Civil   QUOTEWouldn't it be better to create a new top...   Jan 28 2007, 01:04 PM
Serge   Some more mplayer related news, mplayer port for m...   Feb 14 2007, 01:57 PM
tjchick   Hmm. It looks like the mplayer 1.0rc1 code include...   Mar 14 2007, 07:39 AM
Serge   QUOTE(tjchick @ Mar 14 2007, 07:39 AM)Hmm. It...   Mar 14 2007, 08:14 AM
tjchick   QUOTE(Serge @ Mar 14 2007, 05:14 PM)QUOTE(tjc...   Mar 14 2007, 08:29 AM
Meanie   QUOTE(tjchick @ Mar 15 2007, 02:29 AM)QUOTE(S...   Mar 14 2007, 08:53 AM
Serge   QUOTE(tjchick @ Mar 14 2007, 08:29 AM)Yes, yo...   Mar 14 2007, 09:32 AM
tjchick   Yes, IWMMX needs OS support, as well as having th...   Mar 15 2007, 01:51 AM
Serge   QUOTE(tjchick @ Mar 15 2007, 01:51 AM)Yes, IW...   Mar 15 2007, 10:52 AM
tjchick   QUOTE(Serge @ Mar 15 2007, 07:52 PM)QUOTE(tjc...   Mar 15 2007, 12:05 PM
Meanie   actually, i think your new build is much faster th...   Mar 15 2007, 03:39 PM
tjchick   On cacko on c1000, I see: VC: 36.186 VC: 36.927 VC...   Mar 21 2007, 07:10 AM
Serge   You can try to override idct by using '-lavdop...   Mar 21 2007, 08:26 AM
koen   QUOTE(Serge @ Mar 21 2007, 04:26 PM)By the wa...   Mar 21 2007, 08:42 AM
Serge   QUOTE(koen @ Mar 21 2007, 08:42 AM)QUOTE(Serg...   Mar 22 2007, 10:56 AM
koen   QUOTE(Serge @ Mar 22 2007, 06:56 PM)QUOTE(koe...   Mar 22 2007, 01:35 PM
tjchick   QUOTE(Serge @ Mar 21 2007, 05:26 PM)You can t...   Mar 23 2007, 02:00 PM
Serge   Hi, I'm working on further optimizing ARMv5 ID...   Jul 14 2007, 01:16 PM
Capn_Fish   I'll see if I can give it a try. How much is ...   Jul 14 2007, 01:47 PM
Serge   QUOTE(Capn_Fish @ Jul 14 2007, 01:47 PM)I...   Jul 14 2007, 02:04 PM
Civil   pxa270, 416MHz (Zaurus C3100), Gentoo 2007.0, eabi...   Jul 15 2007, 05:45 AM
Serge   QUOTE(Civil @ Jul 15 2007, 05:45 AM)pxa270, 4...   Jul 15 2007, 08:40 AM
Serge   I'm sorry for a long delay with an answer. Cou...   Aug 28 2007, 09:33 PM
speculatrix   Any improvement at all is very much welcomed - I h...   Aug 30 2007, 01:50 PM
Serge   QUOTE(speculatrix @ Aug 30 2007, 01:50 PM)Any...   Sep 2 2007, 10:18 AM
XorA   A zaurus C3200 px27x Before new idct mplayer -no...   Sep 3 2007, 02:32 AM
Serge   OK, thanks, so at least this IDCT optimization is ...   Sep 4 2007, 11:03 AM
speculatrix   could there be other factors affecting memory acce...   Sep 4 2007, 01:03 PM
XorA   Todays SVN mplayer with rev 257 of IDCT code produ...   Sep 20 2007, 05:46 AM
zap   Did some benchmarks today in different environment...   Nov 6 2007, 07:00 AM
zap   Took a look at tcpmp sources this evening. ffmpeg ...   Nov 6 2007, 02:50 PM
Serge   Hello zap, Please also try testing atty's bui...   Nov 6 2007, 11:26 PM
zap   QUOTE(Serge @ Nov 7 2007, 10:26 AM) Pleas...   Nov 7 2007, 10:23 AM
tjchick   Just a quick update from me, mostly of interest to...   Nov 13 2007, 02:38 PM
speculatrix   good news indeed, anything which improves the medi...   Nov 13 2007, 02:59 PM


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