I'm experinecing some problems with tcp throuput using tcp on one of our
IRIX machines (dual cpu Origin 200)
If i use the pingpong test program from the linux performance test from
the lam site (slighly modified to be able to compile it),
I observeve the following runtimes when the i run the program on the
same machine (I repeated the tests on our Altrix box)
IRIX O200 LINUX Altrix
tcp +1 hour 0:03.26
lamd 3:44.96 0:27.94
sysv 0:31.74 0:02.54
As seen the overall runtime of the program varies from a few seconds on
the altrix, tot plus an hour using tcp
on the O200.
Of course the altrix (64 bit itanium processor) is much faster than the
old Origin 200 machine, but
I'm a bit worried about why the tcp performace is so poor on IRIX
machine ( I would have expected it to be
somewhat faster than the lamd mode).
Does anyone experienced a similar pattern with tcp pingponging of large
packets is extremly or have any ideas on what could cause it.
The test has been performed using lam 7.0.6 on both machines
-Morten
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