The result was disappointing: best I could get was around 45 MB/s transfer rate on two 1 GHz dual CPU machines. As a comparison, a very simple minded UDP 'flooder' saturates at around 97 MB/s between those machines. The CPU load during the RX test is slightly over 50% well distributed over both CPU's (why on both?). Repeating the test on two 2GHz XEON machines did not show any improvement. Conclusion: the protocol introduces waits.
Are the default values in RX for window size, ack rate etc. still adequate for today's networks? I tried to play around a bit: increased # of pcks/jumbogram, receive/transmit window size etc. (every time bluntly changing rx_globals.h and rebuilding libafsrpc.a). Nothing really happened. The only improvement we got was cranking up the MTU to around 9K (on a 10GB card that supported it).
Any ideas?
-- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Rainer Toebbicke http://cern.ch/~rtb [EMAIL PROTECTED] O__ European Laboratory for Particle Physics(CERN) - Geneva, Switzerland > | Phone: +41 22 767 8985 Fax: +41 22 767 7155 ( )\( )
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