[Asterisk-Users] Something every TDMP user should know

[Erick Perez]

I have never had to play with setpci before. Can you elaborate on the
use and purpose of this command?


On 5/12/05, Colin Anderson <ColinA at landmarkmasterbuilder.com> wrote:
>  > They instantly got us to look at the output of zttest and we found that
> this was (in their words) 'extremely low', with 'best' and  > 'worst'
> readings of 99.975586% and 99.963379% respectively.  
>  
> Might want to give PCI latency setting a try, it helped for me. My ZTTEST
> would drop occasionally to 99.95% until I set:
>  
> setpci -v -s 01:01.0 latency_timer=ff <--Digium PRI card
> setpci -v -s 01:04:0 latency_timer=ff <--Digium 401 4 X FXS
> setpci -v -s XX:XX:X latency_timer=0 <--1 entry for every other PCI card in
> system from LSPCI output, modify XX:XX accordingly
>  
> Before setpci I would get best in ZTTEST at 99.987793% and worst ~ 99.95%
>  
> After setpci best is 100% and worst is 99.987793% consitient. 
>  
> I use SpanDSP to recieve faxes and before faxes were garbled and now they
> are OK (BTW, now recieving ~150 faxes a day 99.95% OK, so SpanDSP *does*
> work fine, you just have to set it up right. Ask me how.)
>  
> I put the setpci statements in /etc/rc.d/rc.local before my modprobes to the
> Digium hardware and Asterisk startup. 
>  
> I'm using a 4-way Netfinity FC2 * 1.0 stable
>  
> I dunno, maybe the community is being too hard on Digium about the design of
> the card. I can understand their perpective, it's brutal to make a card that
> has to have such tight tolerances and make it work acceptably on the huge
> variation in white box hardware (or black box, in your case). There's a page
> on the Wiki about motherboards that work well with installation notes but
> that's pointless since motherboards are such a moving target. Even the
> motherboard vendor screwing around with BIOS updates can invalidate that
> information. 
>  
> What I think is best for Asterisk implementation is for Digium to sell a
> motherboard. No, seriously. Find a ECS or Abit or ASUS mobo that
> consitiently yields 100% or 99.9999% and white-box it as a barebones kit
> with a TXXX card. Sell it as a case, good PSU, mobo, and TXXX card - you add
> your own RAM, NIC, CPU & HDD. Would you buy one for $699? I probably would.
> It took me a couple of months of fooling around with my Netfinity before I
> was pleased with the performance and satisfied that it would handle the
> things I wanted it to do without choking. If I had the option of saving the
> couple of months time obsessing over things like timing for $699, it would
> have been a no brainer. Digium wins too, because they get an incremental
> sale that they can make money on (margin on the mobo) and lower support
> costs because they don't have to chase down IRQ latency phantoms. 
>  
> hth my 2c
>  
>  
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-- 

-------------------------------------------
Erick Perez
Linux User 376588
http://counter.li.org/  (Get counted!!!)
Panama, Republic of Panama