Date: Mon, 19 Oct 1998 09:47:19 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Bruce Evans <bde@zeta.org.au> Cc: cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG Subject: Here's another odd one: 'cputime exceeded' when no cpu limit set Message-ID: <199810191647.JAA16488@apollo.backplane.com>
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I get this occassionally (on a 200 MHz PPro). FreeBSD-current,
lightly loaded machine. I've been getting this for several
months.
apollo:/usr/src/sys# fgrep vm_page_flag_clear */*.c
Cputime limit exceeded
I added debug code to the kernel. In calcru() I added:
if (totusec < 0) {
/* XXX no %qd in kernel. Truncate. */
printf("calcru: negative time of %ld usec for pid %d (%s)\n",
(long)totusec, p->p_pid, p->p_comm);
totusec = 0;
}
And whenever I get Cputime limit exceeded, the following
kernel message is logged:
calcru: negative time of -21451087 usec for pid 16447 (fgrep)
It seems to occur sometimes I run a command from a shell prompt
that has been idle for a while. Whenever I run the command
a second time, it works. The shell command run does not
seem to matter as long as it takes a non-trivial amount of
time to execute. i.e. ps, fgrep, trn, etc...
When it does occur, it seems to occur within the first second
of command execution.
At first I thought it was due to me setting various CLK flag
in the kernel config but I've turned off those flags and it
still occurs. I tried to zero the value, but that doesn't
seem to work either... the fgrep still dies with the cpu
limit signal.
It is very weird.
-Matt
Matthew Dillon Engineering, HiWay Technologies, Inc. & BEST Internet
Communications & God knows what else.
<dillon@backplane.com> (Please include original email in any response)
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