thr3ads.net - opus - [opus] AM335x ARM Cortex-A8 performance drop opus 1.1 [Oct 2013]

If this information is useful, please help other people find it:
Share via:

Sebastian Reimers

2013-Oct-18 14:11 UTC

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

Hello!,

i've just compared the 1.0.3 release with the master branch
on a BeagleBone Black (AM335x 1GHz ARM Cortex-A8 with NEON
floating-point accelerator) and Arch Linux ARM.

At the moment I dont no why, but I see that 1.1 is much slower
in encoding. Are there any default changes, that I missed and could
explain this? Normaly I suggested a better performance with 1.1 and
the ARM optimizations.

Please let me know, if you need more informations.

opus-tools version 0.1.7


[root at studio-connect.de audio]# opusenc music_orig.wav music_orig.opus
Encoding using libopus 1.0.3 (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding
complete                                                                      
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 8 seconds
                (1.336x realtime)
         Wrote: 1106810 bytes, 4541 packets, 93 pages
       Bitrate: 96.7055kbit/s (without overhead)
 Instant rates: 76kbit/s to 165.6kbit/s
                (190 to 414 bytes per packet)
      Overhead: 0.81% (container+metadata)


[root at studio-connect.de audio]# opusenc music_orig.wav
music_orig.opus1.1
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding
complete                                                                      
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 24 seconds
                (1.081x realtime)
         Wrote: 1263224 bytes, 4541 packets, 93 pages
       Bitrate: 110.387kbit/s (without overhead)
 Instant rates: 24.4kbit/s to 197.2kbit/s
                (61 to 493 bytes per packet)
      Overhead: 0.796% (container+metadata)

Compiler Options:

-march=armv7-a -mfloat-abi=hard -mfpu=neon -O2 -pipe -fstack-protector
--param=ssp-buffer-size=4

same results with:

-march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O2 -pipe
-fstack-protector --param=ssp-buffer-size=4

nice regards

Sebastian Reimers

------------------------------------------
IT-Service Sebastian Reimers
Am blanken Boom 14
32369 Rahden
Festnetz: 05776-137324
Fax-Nummer: 05221-17242088
Skype: miete-admin
E-Mail: service at it-sreimers.de
Internet: www.it-sreimers.de
Internet: www.miete-admin.de
Steuernummer: 331/5079/2619
UST-IdNr.: DE239109607
------------------------------------------

Ralph Giles

2013-Oct-18 19:12 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

On 2013-10-18 7:11 AM, Sebastian Reimers wrote:> Hello!,
> 
> i've just compared the 1.0.3 release with the master branch
> on a BeagleBone Black (AM335x 1GHz ARM Cortex-A8 with NEON
> floating-point accelerator) and Arch Linux ARM.
> 
> At the moment I dont no why, but I see that 1.1 is much slower
> in encoding. Are there any default changes, that I missed and could
> explain this? Normaly I suggested a better performance with 1.1 and
> the ARM optimizations.
In 1.1 we have new float-only analysis code. In a floating point build
it's enabled only at complexity setting 10, with the default dropped to
9 because it does cause a performance regression (in exchange for a
quality progression).

opusenc unconditionally sets the complexity to 10, so it won't adapt to
the change in default, which could cause the issue you're seeing.

Try comparing with --comp 9.

 -r

Gregory Maxwell

2013-Oct-18 19:26 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

On Fri, Oct 18, 2013 at 12:12 PM, Ralph Giles <giles at thaumas.net>
wrote:> In 1.1 we have new float-only analysis code. In a floating point build
> it's enabled only at complexity setting 10,
That should say "In a fixed point build"

Ralph Giles

2013-Oct-18 19:31 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

I wrote:
> In a floating point build
> it's enabled only at complexity setting 10
Sorry. I meant that in a _fixed_point_ build the new analysis code is
enabled only at complexity setting 10. It's currently enabled for
floating point builds at complexity 7 or higher. Both fixed and float
builds default to complexity 9 in 1.1.

 -r

Sebastian Reimers

2013-Oct-18 20:41 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

Hi,
> Try comparing with --comp 9.
many thanks for your quick reply.

but my results looks really strange and no big difference between 10, 9,
8 and 7:

# opusenc --comp 10 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete        
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 19 seconds
                (1.15x realtime)
         Wrote: 1263224 bytes, 4541 packets, 93 pages
       Bitrate: 110.387kbit/s (without overhead)
 Instant rates: 24.4kbit/s to 197.2kbit/s
                (61 to 493 bytes per packet)
      Overhead: 0.796% (container+metadata)

# opusenc --comp 9 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete                              
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 19 seconds
                (1.15x realtime)
         Wrote: 1263224 bytes, 4541 packets, 93 pages
       Bitrate: 110.387kbit/s (without overhead)
 Instant rates: 24.4kbit/s to 197.2kbit/s
                (61 to 493 bytes per packet)
      Overhead: 0.796% (container+metadata)

# opusenc --comp 8 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete      
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 20 seconds
                (1.135x realtime)
         Wrote: 1263224 bytes, 4541 packets, 93 pages
       Bitrate: 110.387kbit/s (without overhead)
 Instant rates: 24.4kbit/s to 197.2kbit/s
                (61 to 493 bytes per packet)
      Overhead: 0.796% (container+metadata)

# opusenc --comp 7 music_orig.wav music_orig.opus 
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete   
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 18 seconds
                (1.164x realtime)
         Wrote: 1252403 bytes, 4541 packets, 93 pages
       Bitrate: 109.435kbit/s (without overhead)
 Instant rates: 24.4kbit/s to 196.4kbit/s
                (61 to 491 bytes per packet)
      Overhead: 0.802% (container+metadata)

# opusenc --comp 6 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete     
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 2 seconds
                (1.465x realtime)
         Wrote: 1208860 bytes, 4541 packets, 93 pages
       Bitrate: 105.661kbit/s (without overhead)
 Instant rates: 27.2kbit/s to 196.4kbit/s
                (68 to 491 bytes per packet)
      Overhead: 0.773% (container+metadata)

# opusenc --comp 5 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding
complete                                                                      
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 1 minute and 3 seconds
                (1.442x realtime)
         Wrote: 1208860 bytes, 4541 packets, 93 pages
       Bitrate: 105.661kbit/s (without overhead)
 Instant rates: 27.2kbit/s to 196.4kbit/s
                (68 to 491 bytes per packet)
      Overhead: 0.773% (container+metadata)

# opusenc --comp 4 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete              
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 39 seconds
                (2.329x realtime)
         Wrote: 1213120 bytes, 4541 packets, 93 pages
       Bitrate: 106.034kbit/s (without overhead)
 Instant rates: 27.2kbit/s to 196kbit/s
                (68 to 490 bytes per packet)
      Overhead: 0.772% (container+metadata)

# opusenc --comp 3 music_orig.wav music_orig.opus
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete      
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 38 seconds
                (2.39x realtime)
         Wrote: 1216331 bytes, 4541 packets, 93 pages
       Bitrate: 106.316kbit/s (without overhead)
 Instant rates: 27.2kbit/s to 196.8kbit/s
                (68 to 492 bytes per packet)
      Overhead: 0.771% (container+metadata)

# opusenc --comp 2 music_orig.wav music_orig.opus 
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete       
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 39 seconds
                (2.329x realtime)
         Wrote: 1215900 bytes, 4541 packets, 93 pages
       Bitrate: 106.278kbit/s (without overhead)
 Instant rates: 26.8kbit/s to 196.8kbit/s
                (67 to 492 bytes per packet)
      Overhead: 0.771% (container+metadata)

# opusenc --comp 1 music_orig.wav music_orig.opus 
Encoding using libopus unknown (audio)
-----------------------------------------------------
   Input: 48kHz 2 channels
  Output: 2 channels (2 coupled)
          20ms packets, 96kbit/sec VBR
 Preskip: 312

Encoding complete                 
-----------------------------------------------------
       Encoded: 1 minute and 30.82 seconds
       Runtime: 35 seconds
                (2.595x realtime)
         Wrote: 1214244 bytes, 4541 packets, 93 pages
       Bitrate: 106.133kbit/s (without overhead)
 Instant rates: 26.8kbit/s to 196.8kbit/s
                (67 to 492 bytes per packet)
      Overhead: 0.771% (container+metadata)




cheers,


Sebastian Reimers

Sebastian Reimers

2013-Oct-18 20:59 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

> Sorry. I meant that in a _fixed_point_ build the new analysis code is
> enabled only at complexity setting 10. It's currently enabled for
> floating point builds at complexity 7 or higher. Both fixed and float
> builds default to complexity 9 in 1.1.
Ok this could explain why --comp 6 is nearly the same as --comp 10 with
1.0.3 ?

Jean-Marc Valin

2013-Oct-18 21:21 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

Hi,

Just to clear things up... So 1.1 has some new analysis code that
increases the amount of CPU. When building as floating point (which you
appear to be doing, right?), the new code is enabled at complexity 7 and
up (opusenc defaults to complexity 10 IIRC). This is why you've been
seeing an increase in the CPU time. In version 1.0.x, complexity 5-10
are the exactly the same for music. Running version 1.1 at complexity 5
should be slightly faster than 1.0.x.

When it comes to fixed-point, things are similar except that the
threshold at which the new analysis code is enabled is complexity 10.
This is because the new code uses floating-point instructions, even for
a fixed-point build.

Cheers,

	Jean-Marc

On 10/18/2013 10:11 AM, Sebastian Reimers wrote:> Hello!,
> 
> i've just compared the 1.0.3 release with the master branch
> on a BeagleBone Black (AM335x 1GHz ARM Cortex-A8 with NEON
> floating-point accelerator) and Arch Linux ARM.
> 
> At the moment I dont no why, but I see that 1.1 is much slower
> in encoding. Are there any default changes, that I missed and could
> explain this? Normaly I suggested a better performance with 1.1 and
> the ARM optimizations.
> 
> Please let me know, if you need more informations.
> 
> opus-tools version 0.1.7
> 
> 
> [root at studio-connect.de audio]# opusenc music_orig.wav music_orig.opus
> Encoding using libopus 1.0.3 (audio)
> -----------------------------------------------------
>    Input: 48kHz 2 channels
>   Output: 2 channels (2 coupled)
>           20ms packets, 96kbit/sec VBR
>  Preskip: 312
> 
> Encoding
> complete
> -----------------------------------------------------
>        Encoded: 1 minute and 30.82 seconds
>        Runtime: 1 minute and 8 seconds
>                 (1.336x realtime)
>          Wrote: 1106810 bytes, 4541 packets, 93 pages
>        Bitrate: 96.7055kbit/s (without overhead)
>  Instant rates: 76kbit/s to 165.6kbit/s
>                 (190 to 414 bytes per packet)
>       Overhead: 0.81% (container+metadata)
> 
> 
> [root at studio-connect.de audio]# opusenc music_orig.wav
> music_orig.opus1.1
> Encoding using libopus unknown (audio)
> -----------------------------------------------------
>    Input: 48kHz 2 channels
>   Output: 2 channels (2 coupled)
>           20ms packets, 96kbit/sec VBR
>  Preskip: 312
> 
> Encoding
> complete
> -----------------------------------------------------
>        Encoded: 1 minute and 30.82 seconds
>        Runtime: 1 minute and 24 seconds
>                 (1.081x realtime)
>          Wrote: 1263224 bytes, 4541 packets, 93 pages
>        Bitrate: 110.387kbit/s (without overhead)
>  Instant rates: 24.4kbit/s to 197.2kbit/s
>                 (61 to 493 bytes per packet)
>       Overhead: 0.796% (container+metadata)
> 
> Compiler Options:
> 
> -march=armv7-a -mfloat-abi=hard -mfpu=neon -O2 -pipe -fstack-protector
> --param=ssp-buffer-size=4
> 
> same results with:
> 
> -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O2 -pipe
> -fstack-protector --param=ssp-buffer-size=4
> 
> nice regards
> 
> Sebastian Reimers
> 
> ------------------------------------------
> IT-Service Sebastian Reimers
> Am blanken Boom 14
> 32369 Rahden
> Festnetz: 05776-137324
> Fax-Nummer: 05221-17242088
> Skype: miete-admin
> E-Mail: service at it-sreimers.de
> Internet: www.it-sreimers.de
> Internet: www.miete-admin.de
> Steuernummer: 331/5079/2619
> UST-IdNr.: DE239109607
> ------------------------------------------
> 
> _______________________________________________
> opus mailing list
> opus at xiph.org
> http://lists.xiph.org/mailman/listinfo/opus
>

Gregory Maxwell

2013-Oct-18 21:23 UTC

head link

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

On Fri, Oct 18, 2013 at 2:21 PM, Jean-Marc Valin <jmvalin at jmvalin.ca>
wrote:> Just to clear things up... So 1.1 has some new analysis code that
> increases the amount of CPU. When building as floating point (which you
> appear to be doing, right?), the new code is enabled at complexity 7 and
> up (opusenc defaults to complexity 10 IIRC). This is why you've been
> seeing an increase in the CPU time. In version 1.0.x, complexity 5-10
> are the exactly the same for music. Running version 1.1 at complexity 5
> should be slightly faster than 1.0.x.
>
> When it comes to fixed-point, things are similar except that the
> threshold at which the new analysis code is enabled is complexity 10.
> This is because the new code uses floating-point instructions, even for
> a fixed-point build.
Adding to this, on cortex a8 a fixed point build will be faster.

Seemingly Similar Threads

Search for more seemingly similar threads

opus - Oct 2013 - AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

[opus] AM335x ARM Cortex-A8 performance drop opus 1.1

Seemingly Similar Threads