Date: Thu, 17 Sep 2009 13:34:04 +0100 From: Anton Shterenlikht <mexas@bristol.ac.uk> To: Roland Smith <rsmith@xs4all.nl> Cc: glewis@freebsd.org, Anton Shterenlikht <mexas@bristol.ac.uk>, freebsd-questions@freebsd.org, freebsd-ia64@freebsd.org Subject: Re: port math/gnuplot hangs and ignores "kill -9" Message-ID: <20090917123404.GA101@mech-cluster241.men.bris.ac.uk> In-Reply-To: <20090914172233.GA69286@slackbox.xs4all.nl> References: <20090914153728.GA60162@mech-cluster241.men.bris.ac.uk> <20090914154241.GA60268@mech-cluster241.men.bris.ac.uk> <20090914172233.GA69286@slackbox.xs4all.nl>
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On Mon, Sep 14, 2009 at 07:22:33PM +0200, Roland Smith wrote: > On Mon, Sep 14, 2009 at 04:42:41PM +0100, Anton Shterenlikht wrote: > > On Mon, Sep 14, 2009 at 04:37:28PM +0100, Anton Shterenlikht wrote: > > > on ia64 HEAD, gnuplot-4.2.6, any plot command > > > hangs the program. top shows gnuplot is using 100% of CPU, > > > yeat CPU time is zero: > > > > > > PID UID THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND > > > 60071 1001 2 48 0 98008K 51424K CPU1 1 0:00 100.00% gnuplot > > > > > > kill -9 60071, either from my account, or from root, > > > has no effect, the process is still there. > > > > > > I cannot find a way to terminate this hanged process without reboot. > > > > > > This seems to be a regression. > > > > running gnuplot in batch (non-interactive) mode seems fine, so > > the problem seems to be with the screen terminal. > > > > I'm mostly puzzled by the fact that I cannot kill the process.. > > It could be that the process is stuck in the 'D' state (uninterruptable wait). > You can veryfiy that by running 'ps -u' and looking in the eight column when > gnuplot is running. > > Does the window with the plot actually appear? > > Interactive use of gnuplot-4.2.6 is fine on amd64 7.2-RELEASE-p2. I reinstalled gnuplot-4.2.6 and (hopefully) all ports on which it depends. I still get the same behaviour. top -PISu shows: last pid: 108; load averages: 0.88, 0.35, 0.19 up 2+02:23:38 13:27:52 109 processes: 4 running, 88 sleeping, 17 waiting CPU 0: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle CPU 1: 0.0% user, 0.0% nice, 100% system, 0.0% interrupt, 0.0% idle Mem: 105M Active, 2074M Inact, 363M Wired, 768K Cache, 827M Buf, 5322M Free Swap: 19G Total, 19G Free PID UID THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 11 0 2 171 ki31 0K 64K RUN 0 77.9H 100.00% idle 99992 1001 2 48 0 98240K 55608K CPU1 1 0:00 100.00% gnuplot so gnuplot is using 100% and all in system state. and ps -u: USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND mexas 99992 98.1 0.7 98240 55608 5 R+ 1:25pm 0:00.72 gnuplot so the state is not "D". The window does appear (just using simple gnuplot> plot sin(x), and the terminal is set to 'wxt', but nothing ever apears in the window. My guess is that the problem is not in gnuplot, but in the base OS. Any advice on how to debug this problem further. Once again, batch use of gnuplot is fine, it's just the screen operations which are affected. many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423
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