[hylafax-users] [asterisk-users] asterisk, iaxmodem, hylafax quality problem

[Jay R. Ashworth]

On Sun, Sep 24, 2006 at 02:01:01PM -0700, Lee Howard wrote:
> Artifex Maximus wrote:
> >zttest is often on 99.975586% with final result:
> >--- Results after 67 passes ---
> >Best: 99.987793 -- Worst: 99.951172 -- Average: 99.973764
> 
> This is unacceptable for faxing, and it is evidence of the underlying 
> problem also causing your faxes to come through with poor quality.
> 
> > 0: 2087872259    IO-APIC-edge  timer
> > 7:          0    IO-APIC-edge  parport0
> > 8:          1    IO-APIC-edge  rtc
> > 9:          1   IO-APIC-level  acpi
> >14:   18440124    IO-APIC-edge  ide0
> >15:    4456445    IO-APIC-edge  libata
> >169:    4878102   IO-APIC-level  eth0
> >177: 2086847525   IO-APIC-level  wctdm24xxp
> >185: 2086810653   IO-APIC-level  wct4xxp 
> 
> Notice the priorities here... and that your Zaptel cards come *last*, 
> after eth0, after IDE.  Each of those Zap cards are going to generate an 
> interrupt once every millisecond when in use.  You can hopefully imagine 
> how IDE or eth0 activity would interfere, since they have a higher 
> priority than the Zap cards.

The Digium cards interrupt *on every scheduler tick*?

Is that a latency thing?  or just sloppy design?

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra at baylink.com
Designer                          Baylink                             RFC 2100
Ashworth & Associates        The Things I Think                        '87 e24
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