On 01.02.2010, at 21:27, Patrick Karl wrote:
I have noticed a resource problem in LilyPond, namely invocation of
the "Compile/Typeset file" command in interactive mode always
consumes one more pid. When I enter music, I incrementally compile
it as I go. I do my work on a Mac running OS 10.4. There are a
fixed number of pids available for all the programs running on the
Mac. This means that as I continue to incrementally compile in
LilyPond, the number of available pids grows less, eventually
running out.
If LilyPond were a C program, this behavior could be caused by
executing an "exec" call to generate a child process but not later
waiting for the child to complete. This means that when the child
process does complete, it becomes what is called a zombie or
defunct pid. I suspect something similar is happening in LilyPond.
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Excuse my ignorance, but what is this about a fixed number of pids
available for all the programs? I run lilypond in a terminal and call
it from the command line. After issuing the "lilypond" command, top
shows lilypond, then sh, then gs, then all of them exit. Subsequent
lilypond commands just increase the pid as they go along. I just
restarted my computer yesterday, but shortly before I did, I noticed
that the pid's were in the 20,000 range. I would assume that they
just keep counting up, but then, I've not had a problem with zombie
processes, at least, not from lilypond or gs.
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