asterisk users - Nov 2005 - Zaptel: Hz != 1000 causing ztdummy compilationerror?

A jiffy is a kernel timer, this affects many thing in the kernel.  Linux for as
long as I know uses 1000hz.  I am really surprised this failed on fc4.  Ztdummy
uses this as a base for timing, particularly with meetme and tdmoe.  If its not
high enough quality may be degraded.

As for what you tried, you tried to adjust the realtime clock, which is slightly
different.

What kernel version are you using?


-----Original Message-----
    From: "Patrick"<asterisk@puzzled.xs4all.nl>
    Sent: 11/4/05 2:34:14 AM
    To: "Asterisk Users Mailing List - Non-Commercial
Discussion"<asterisk-users@lists.digium.com>
    Subject: [Asterisk-Users] Zaptel: Hz != 1000 causing ztdummy
compilationerror?
      Hi all,
    
    When I compile zaptel from today's cvs HEAD on an updated FC4 box it
    fails with the following message:
    
      CC [M]  /home/patrick/redhat/BUILD/zaptel/ztdummy.o
    /home/patrick/redhat/BUILD/zaptel/ztdummy.c:103:2: error: #error ztdummy
    requires 1000 hz jiffies
    
    If I comment out the code causing that error the compilation goes fine
    but I guess it's there for a reason :) After some googling I tried the
    following but that did not solve the issue:
    echo 1000 > /proc/sys/dev/rtc/max-user-freq
    compile still fails
    echo 1024 > /proc/sys/dev/rtc/max-user-freq
    compile also fails
    
    Anyone have a pointer how I solve this error?
    
    Thanks and regards,
    Patrick
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On Tue, 1980-01-01 at 09:11 -0800, Trixter http://www.0xdecafbad.com/
wrote:
> A jiffy is a kernel timer, this affects many thing in the kernel.  Linux
for as long as I know uses 1000hz.  I am really surprised this failed on fc4. 
Ztdummy uses this as a base for timing, particularly with meetme and tdmoe.  If
its not high enough quality may be degraded.
> 
> As for what you tried, you tried to adjust the realtime clock, which is
slightly different.
> 
> What kernel version are you using?
> 
He is probably using 2.6.14 in which you can opt for 100hz (servers),
250hz (mixed) and 1000hz (desktops).

I discussed this with Kevin when the 2.6.14 series started, have a look
in the archives.

CVS ztdummy certainly compiles correctly with 100hz.
 
-- 
Dave Cotton <dcotton@linuxautrement.com>

On Tue, 1980-01-01 at 09:11 -0800, Trixter http://www.0xdecafbad.com/
wrote:
> A jiffy is a kernel timer, this affects many thing in the kernel.  Linux
for as long as I know uses 1000hz.  I am really surprised this failed on fc4. 
Ztdummy uses this as a base for timing, particularly with meetme and tdmoe.  If
its not high enough quality may be degraded.
> 
> As for what you tried, you tried to adjust the realtime clock, which is
slightly different.
> 
> What kernel version are you using?
The kernelversion is 2.6.13-1.1526_FC4 on x86_64. I just tried to build
the same zaptel on a i686 FC4 box (same kernel version) and it built just
fine. The only difference between the two (besides the obvious) is that
the x86_64 is booted with "no_timer_check" to prevent the clock/time
from going way faster than it should. When booting the kernel there is a
messages that says "8254 timer not connected to IO-APIC".

Any suggestions?

Regards,
Patrick

ps. the date on your email said Jan 1, 1980.