This came up recently, one problem is that there a couple of kernel
functions having up to 3 stack-based arrays of dimension PIPE_BUFFER. So
the stack cost of increasing PIPE_BUFFERS can be quite high. I've
thought it might be nice if there was some mechanism for userland apps
to be able to request larger PIPE_BUFFERS values, but I haven't pursued
It's a neat idea, but it would probably be much easier (and less
invasive) to try this sort of pipelining in userland using a ring buffer
or ping-pong approach. I'm actually in the middle of something like this
with FTP, where I will have a reader thread that puts data from the
network into a ring buffer, from which a writer thread moves it to a
file.
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Steven J. Magnani "I claim this network for MARS!
www.digidescorp.com Earthling, return my space modulator!"
#include <standard.disclaimer>
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