[Asterisk-Users] Asterisk on FreeBSD

[Perry E. Metzger]

"Olle E. Johansson" <oej at edvina.net> writes:
> > On the BSDs, your friend is ktrace (or ktruss, depending on
> > flavor). It will tell you what system calls your process is executing
> > while it is doing this.
> ktrace on FreeBSD generates a file filled with this:
> And some signals caught here and there.
> Doesn't make me wiser.

Doesn't it? Have a look. For whatever reason, poll is constantly
returning (indicating something is ready for I/O), the program tries
to read from file descriptor 21, and there is nothing there to
read. It is doing this in a tight loop, thus your problem. You have to
figure out what's wrong in the event loop causing this behavior. It
might be an OS bug, or it might be a program bug, but it seems pretty
obvious that it is a bug.

The SIGPROF stuff indicates you're running profiling on the
executable. Turn that off when you're doing a ktrace run.

Perry


> /Olle
> ---------------------------------------------------------------
> 74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
>         ""
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
> 
> ----------
> And sometimes this - repeated many times:
> 
>         ""
>   74987 asterisk PSIG  SIGPROF caught handler=0x28180260 mask=0x0 code=0x0
>   74987 asterisk RET   read 0
>   74987 asterisk CALL  gettimeofday(0x281c8e88,0)
>   74987 asterisk RET   gettimeofday 0
>   74987 asterisk CALL  sigprocmask(0x3,0x281c8ef8,0)
>   74987 asterisk RET   sigprocmask 0
>   74987 asterisk CALL  poll(0x80cf000,0x4,0)
>   74987 asterisk RET   poll 0
>   74987 asterisk CALL  sigreturn(0xbfa87cec)
>   74987 asterisk RET   sigreturn JUSTRETURN
>   74987 asterisk CALL  poll(0x851e400,0x1,0)
>   74987 asterisk RET   poll 1
>   74987 asterisk CALL  read(0x15,0x2845e060,0x100)
>   74987 asterisk GIO   fd 21 read 0 bytes
> 
> 
> -----------------
> 
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-- 
Perry E. Metzger		perry at piermont.com