linux-os (Dick Johnson) wrote:
Message signaled interrupts are just a kudge to save a trace on a
PC board (read make junk cheaper still). They are not faster and
may even be slower.
Save a trace on the PC board? How about no, since the devices still need
to support INTX interrupts anyway. And yes, they can be faster, mainly
because being an in-band signal it simplifies some PCI posting related
issues, and there is no need to worry about sharing.
> They will not be the salvation of any interrupt
latency problems. The solutions for increasing networking speed,
where the bit-rate on the wire gets close to the bit-rate on the
bus, is to put more and more of the networking code inside the
network board. The CPU get interrupted after most things (like
network handshakes) are complete.
You mean like these?
http://linux-net.osdl.org/index.php/TOE
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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