process hangs when writing large data to pipe

Question

I have a problem with hung processes with my Perl program, and I think I have isolated it to whenever I write significant amounts of data to a pipe.

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Answer 1

You probably shouldn't be ignoring your pipe while it is returning data: you can use a select on the pipe (instead of waitpid) to see if there's any data to read during your waiting loop, but if you really want a larger pipe buffer so you can read it all at once, you can use a socketpair instead of a pipe and then you can use setsockopt to make the buffer as large as you need it.