From:	STAR::HUGHES       "Friends don't let friends use DOS" 12-MAY-1995 15:37:44.04
To:	GOLEMAN,EICHE,DANTONI
CC:	HUGHES
Subj:	increasing buffer sizes in RPC

I added the function call to increase transmit and receive buffer sizes in RPC
to the server and test client, with some interesting results.

The numbers are in the form old->new, where the old numbers were generated with
default buffer size and the new with a buffer size of 16384. The client node
was running three instances of the test_client. The MSCP numbers are for
reference from previous tests. I/O is reads to random lbns.


transfer size		decnet		tcp		udp		mscp
1 block		IO/sec			45->50		41->43		59
		cpu%			42->32		42->33		30

4 blocks	IO/sec	44->48		43->47		26->27		57
		cpu%	42->34		44->36		42->33
                                                              
16 blocks	IO/sec	25->24		22->23		11->11		51
		cpu%	35->26		39->27		40->30

The numbers with buffersize = 32768 were identical.

Interestingly the larger buffer size is win for CPU utilization but a modest
change to the throughput. I still think the server is hitting some kind of
process quota limit.

gary