Hi Sisyphus.
I agree, the gnuplot processes become zombies in some cases. Even persisting
past quiting pdl. I too use pskill to get rid of them.
Thanks for the codepage reference. I am looking into whether IPC::Run might be
a better choice than IPC::OpenX as indicated by several threads in perldoc.org
and stackoverflow. Also looking into Programming Perl - there is a section on
interprocess communications with Win32.
CLIFF SOBCHUK
Core RF Engineering
Phone 613-667-1974 ecn: 8109-71974
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yahoo: sobchuk
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-----Original Message-----
From: Sisyphus [mailto:[email protected]]
Sent: Friday, January 27, 2012 12:48 AM
To: Chris Marshall; Craig DeForest
Cc: [email protected]
Subject: Re: [Perldl] PDL::Graphics::Gnuplot on Win32 Vista.
----- Original Message -----
From: "Chris Marshall" <[email protected]>
To: "Craig DeForest" <[email protected]>
Cc: <[email protected]>
Sent: Friday, January 27, 2012 5:49 AM
Subject: Re: [Perldl] PDL::Graphics::Gnuplot on Win32 Vista.
> The basic command works on cygwin (which is what I
> would expect since it acts like unix). However, the
> same command fails on win32 with a message about
> not talking to the gnuplot for 5sec so that is where the
> IPC::Run (or is it open3) is a problem.
This is just IO::Select's can_read() method not working on windows. It
returns immediately, no matter what the timeout. (In a nutshell, we can't
make use of this method on Windows.)
You'll find that message occurs about half a second after the script starts
to execute. (Essentially, I've just been ignoring this message.)
Other things to watch for on Windows:
1) Each time you close the gnuplot.exe, it remains as a zombie. Every now
and then you'll want to kill off these zombies - which I've been doing with:
taskkill /F /IM gnuplot.exe
2) The following warning message was interfering with the way things ran:
Warning: The codepage of the graph window (1252) and that of the console
(850) differ. Use `set encoding` or `!chcp` if extended characters don't
display correctly.
If you get that warning message, you probably want to get rid of it (for the
time being, at least) - which I've been doing with:
mode CON codepage select=1252
I'm able to get gnuplots on Windows, though there's still a bit to be done.
I haven't tried zowie's latest yet - but I'd like to get back to it when I
get a chance.
Cheers,
Rob
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