The following rearrangement may help, 

# ... the loop
close( PARENT );
print "parent received: ";
print '.' while <CHILD>;
print "\n";
close( CHILD );
while( %pid ) { reap() }

[download]
That lets you draw down the buffer, making room for the other kids to print. It would also do no harm to try autoflushing the PARENT handle.

After Compline,
Zaxo

In reply to Re: Wait hangs when pipe is full by Zaxo
in thread Wait hangs when pipe is full by xiper

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