Re: 'crafty' took ages to kill

From: Lyle Merdan (lyle_at_visi.com)
Date: 12/30/03 

Date: 30 Dec 2003 17:13:02 GMT

In comp.sys.sun.admin Dr. David Kirkby <see_my_signature_for_my_real_address@hotmail.com> wrote:
: Sorry for the cross-posting to two quite different newsgroups, but it
: seems appropiate in the circumstances.

: 'crafty' is a well known chess program that can run on UNIX machines.
: I've just spent quite a while trying to 'kill' an unwanted 'crafty'
: process running on my UNIX worksation, which I noticed had eaten up
: some 61 hours of CPU time. Despite

: % kill pid

: then when that failed

: % kill -9 pid

: a couple of times, it would not die. Finally after about 5 kill -9's
: the process died. Has anyone seen this before? I'm running a Sun Ultra
: 80 workstation, Solaris 9, 4 x 450 MHz CPUs, 4 GB RAM, crafty 19.7
: built for multi-threaded operation.

: What can stop a process responding to SIGKILL ?? Since there were two
: copies of this process running (one intentional, one not intenstional)
: each configured to use 4 CPUs, the load average was about 8, but that
: should not be excessive for a quad processor machine. The machine did
: not appear under any strain, and interactive peformance was fine, so
: I'm a bit puzzled why this should happen.

: I've seen similar things before on a Sun and once a reboot was
: required. I'm just not quite sure how it can occur.

: As usual, my email address can be found at
: http://atlc.sourceforge.net/contact.html
: should anyone choose to email me, although the newsgroup is probably a
: better place for a response.

If a kill -9 doesn't zap a process I usuall try kill -XCPU and that
will many times do the trick.

Lyle

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