[Asterisk-Users] Re: hfc-s card, brii-stuff.0.1.0-RC4a, zaphfc: sync lost, pci performance too low. you might have some cpu throtteling enabled.

[Hartmut Wahl]

Hello, 

I have investigated the issue a bit further, I was not able to find the
root cause, maybe it is the KT133 Chipset of my ASUS A7V. However I
found a bad hack to make it work under some circumstances. I commented
out the line:

printk(KERN_CRIT "zaphfc: sync lost, pci performance too low. you might
have some cpu throtteling enabled.\n");

in zaphfc/zaphfc.c. Since when this situation happened once, the syslog
started and this caused the situation again -> endless loop with high
sysload. Now the sync lost happens probably every now and then but it
does not go into an endless loop.

I also recognized that I must not run setiathome since then the audio
quality of connections via the hfc-card will suffer (crackling).
Amazingly cpuburn (takes every cpu-Time it gets as well) does not have
this effect. I have no idea what strange things setiathome does to cause
this but it reminds me of a sound card problem on this board. My SB-Live 
had crackling when I ran setiathome but I think with a newer driver 
(and ALSA I think) this problem was gone.

Things that did not help:
- Trying to change the latency (is fixed to 16 and cannot be changed)
- Trying to change the latency of my other pci-devices (much higher and
  much lower).
- Playing around with BIOS Options like delayed transaction, etc.
- Changing PCI-slots
- Making sure that the ISDN-card did not share the IRQ 
- Having only the ISDN-card and the Video-card in the System

Hope that helps others who encounter this problem as well
 Hartmut

On Sat, Sep 11, 2004 at 12:55:21PM +0200, Hartmut Wahl wrote:
> Hi!
> 
> On Sat, Sep 11, 2004 at 10:38:48AM +0200, Maurizio Marini wrote:
> > my machine did hangup as growing logs fullfilled partition
> 
> hmm I see, mine is 8G, but it has gronwn from 0.5G to 2.0G
>  
> > it does apply to asterisk, not to zaphfc :(
> > it was a misleading suggestion, so
> > i solved it installing in an other more powerful machine:
> > 
> > processor       : 0
> > vendor_id       : GenuineIntel
> > cpu family      : 6
> > model           : 8
> > model name      : Pentium III (Coppermine)
> > stepping        : 10
> > cpu MHz         : 999.556
> > cache size      : 256 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 sep mtrr pge mca 
> > cmov pat pse36 mmx fxsr sse
> > bogomips        : 1957.88
> > 
> > with this hw i've no issues at all; even strange messages i complained about 
> > in my previous posts like:
> 
> ok we are getting closer, although speed shouldn't be a problem:
> 
> vendor_id       : AuthenticAMD
> model name      : AMD Athlon(tm) Processor
> stepping        : 4
> cpu MHz         : 1059.618
> cache size      : 256 KB
> bogomips        : 2097.15
> 
> it is a 1,4GHz underclocked, since my ASUS A7V with KT133 does only
> support 100MHz FSB, but it requires only slow and quite fans.
> 
> I think I'll try different kernels maybe something in the Debian
> k7-kernel-image interferes.
> 
> Greetings
>   Hartmut
> 

-- 
Hartmut Wahl <hwahl (at) hwahl (dot) de>
www: http://www.hwahl.de
PGP: http://www.hwahl.de/HartmutWahl.asc