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Newsgroups: mail-lists.delegate-en

[DeleGate-En] strange performance problem
06 Mar 2004 06:14:54 GMT Gong Su <p7qeqbdyi-mxhgu4zjq73w.ml@delegate.org>
Computer Science Department, Columbia University

Hi, I just downloaded 8.9.2 and am trying to do some performance testing.
I have a setup:

client - proxy - server

which are all the same machines (1GHz Intel running Redhat 9 with
2.4.20 kernel) and are connected with GigaE connections.

I'm using a program called netperf (http://www.netperf.org/) which has
a measurement that mimics http request/response and measures the number
of such "transactions" per second. This is basically to measure the
connection setup performance since each transaction uses a new connection.

When I conducted the measurement directly between the client and proxy
(or between the proxy and the server), I get over 1000 transactions per
second. But when I conducted the measurement between the client and the
server with delegate running on the proxy using the following command:

./delegated -P12865,12866 SERVER=tcprelay://server:- CACHE=no

(the two ports are used by netperf, one for control, one for data)

I got 25 transactions per second! Interestingly, when I used -v to
turn on debugging output, I got 22 transactions per second! So I know
I must be doing something wrong. But I can't figure what; since it's
a fairly straightforward relay. Any help will be highly appreciated.
Thank you.

-- 
/Gong


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