[Asterisk-Users] zttest

[Waldo Rubinstein]

I have tried disabling H/T, setpci (from Gustavo Alvarez's email),  
assigning unique IRQs, and swapping PCI slots. Yet, I still get very  
similar results as:

--- Results after 20 passes ---
Best: 99.987793 -- Worst: 99.975586 -- Average: 99.986572

The only reason I'm looking into this is because my users are saying  
that the quality of the calls with the previous PBX was better and  
clearer. With *, they hear everything fine, but, every once in a  
while there is like air gaps or white noise that last for fractions  
of a second. Am I looking in the right place?

- Waldo

On May 16, 2005, at 6:14 PM, Rich Adamson wrote:

>> Rich, did you check IRQ's?  Our zttest results didn't improve  
>> markedly
>> when we did either change (IRQ's or H/T), but the problem went away
>> regardless.
>>
>> Other than that Digium have recommended throwing out our SCSI320 RAID
>> hardware and replacing it with IDE (i.e. not SATA) kit, although
>> thankfully we haven't had to make this retarded change (yet).
>>
>> I would also recommend trying to disable H/T in the BIOS (rather than
>> via software) as I wonder if H/T still runs on your box (but is not
>> accessed by the OS), so may still be causing you grief.
>>
>
> Yes, been through the majority of items including irq's, swapped
> motherboards, ide only, nothing else running, command line only (no
> frame buffers), upgrade from rhv9 to fedora 3, mucked with pci
> latency, etc.  Had not tried the hyperthread thing until now, but
> that had no effect either. Even upgraded the TDM card to the latest
> rev h.
>
> Still think its either a bad TDM card design, or, TDM driver issue
> as to why we can't approach zttest results of 100%.
>
> I'm hoping that Steve Underwood's utility to measure the TDM results
> helps to identify the root cause.
>
>
>
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