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Date:      04 Dec 1996 11:47:00 +0200
From:      Kai Vorma <vode@snakemail.hut.fi>
To:        "David S. Miller" <davem@jenolan.rutgers.edu>
Cc:        hackers@freebsd.org
Subject:   Re: TCP/IP bandwidth bragging
Message-ID:  <mbou3q2bq0b.fsf@skye.hut.fi>
In-Reply-To: "David S. Miller"'s message of 3 Dec 1996 06:28:37 %2B0200
References:  <MLIST_199612030410.XAA18471@jenolan.caipgeneral>

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"David S. Miller" <davem@jenolan.rutgers.edu> writes:

> ---------------------------------------------////
> Yow! 11.26 MB/s remote host TCP bandwidth & ////
> 199 usec remote TCP latency over 100Mb/s   ////
> ethernet.  Beat that!                     ////
> -----------------------------------------////__________  o
> David S. Miller, davem@caip.rutgers.edu /_____________/ / // /_/ ><

Ok, how about this?

---------------------------------------------------------------------------
cactus-18 - 11:36 - ~ > ttcp -s -t -l 65536 cactus-24-s
ttcp-t: buflen=65536, nbuf=2048, align=16384/0, port=5001  tcp  -> cactus-24-s
ttcp-t: socket
ttcp-t: connect
ttcp-t: 134217728 bytes in 4.30 real seconds = 30468.04 KB/sec +++
ttcp-t: 2048 I/O calls, msec/call = 2.15, calls/sec = 476.06
ttcp-t: 0.1user 2.3sys 0:04real 58% 0i+9d 176maxrss 0+16pf 939+1022csw
0.120u 2.410s 0:04.32 58.5% 0+9k 0+0io 0pf+0w
---------------------------------------------------------------------------

30 MB/s remote host TCP bandwidth :-)

The machine is dirty old IBM SP2 with wide nodes (similar to 
RS/6000 590 which appeared in 1993, I think) and HPS2 switch.

Okay, the HPS2 switch is quite a different animal than ethernet, but
you asked.. :-)

..vode





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