[Asterisk-Users] Zaptel Anti-MMX Optimizations

[Michael D Schelin]

Hay Trevor, what would be the problem if you were using AMD processors?


Trevor Peirce wrote:

> Hello,
>
> Running Fedora Core 2 with a Celeron processor I'm seeing a 
> significant problem when enabling MMX optimizations.
>
> I'll gladly submit a bug report, but I don't know what information is 
> useful.
>
> First, with -no- MMX optimizations enabled, here is what I see
>
> CLI> show translation
>        Translation times between formats (in milliseconds)
>         Source Format (Rows) Destination Format(Columns)
>
>        g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex  ilbc
>  g723     -     -     -     -     -     -     -     -     -     -     -
>   gsm     -     -     2     2     3     2     1    11    18     -    24
>  ulaw     -     5     -     1     3     2     1    11    18     -    24
>  alaw     -     5     1     -     3     2     1    11    18     -    24
>  g726     -     6     3     3     -     3     2    12    19     -    25
> adpcm     -     5     2     2     3     -     1    11    18     -    24
>  slin     -     4     1     1     2     1     -    10    17     -    23
> lpc10     -     7     4     4     5     4     3     -    20     -    26
>  g729     -     7     4     4     5     4     3    13     -     -    26
> speex     -     -     -     -     -     -     -     -     -     -     -
>  ilbc     -     8     5     5     6     5     4    14    21     -     -
>
> If I enable MMX_OPTIMIZATIONS (and change nothing else), it gets quite 
> worse....
>
> CLI> show translation
>        Translation times between formats (in milliseconds)
>         Source Format (Rows) Destination Format(Columns)
>
>        g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex  ilbc
>  g723     -     -     -     -     -     -     -     -     -     -     -
>   gsm     -     -     2     2     3     2     1    48    20     - 446270
>  ulaw     -     5     -     1     3     2     1    48    20     - 446270
>  alaw     -     5     1     -     3     2     1    48    20     - 446270
>  g726     -     6     3     3     -     3     2    49    21     - 446271
> adpcm     -     5     2     2     3     -     1    48    20     - 446270
>  slin     -     4     1     1     2     1     -    47    19     - 446269
> lpc10     -   368   365   365   366   365   364     -   383     - 446633
>  g729     -    23    20    20    21    20    19    66     -     - 446288
> speex     -     -     -     -     -     -     -     -     -     -     -
>  ilbc     -   266   263   263   264   263   262   309   281     -     -
>
>
> And just incase you think I've got an AMD, here you go...
>
>
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 15
> model           : 1
> model name      : Intel(R) Celeron(R) CPU 1.70GHz
> stepping        : 3
> cpu MHz         : 1716.114
> cache size      : 128 KB
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 2
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca 
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
> bogomips        : 3399.68
>
>
> If this isn't supposed to work with Celerons I'd like to update the 
> documentation. On the other hand if it's a problem with my system I'd 
> like to resolve it :)
>
> TIA!
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