Sockets On Same Machine For Windows and Linux

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As for TCP performance, I have done this sort of test recently on an HP-UX server (8 Intel Itanium 2 processors 1.5 GHz 6 MB, 400 MT/s bus) and on Red Hat Linux (2 IA-64 1,6 Ghz). I used iperf in order to test TCP performance. I found that speed of TCP exchange is more than ten times faster when I run iperf on the same machine comparing to running iperf on two different machines.

You can also give it a try as there are options that might be of interest to you – length of buffer to read or write, set TCP no delay and so on. Also you can compare speed of TCP exchange on Windows machines as there is a version of iperf for Winddws.

This is a more detailed comparison:

1) Speed of TCP exchange between two iperf applicatons running on different HP-UX server, default TCP window 32K: 387 Mbits/sec

2) Speed of TCP exchange between two iperf applicatons running on different HP-UX server, TCP window 512K: 640 Mbits/sec

3) Speed of TCP exchange between two iperf applicatons running on the same HP-UX server, default TCP window 32K: 5.60 Gbits/sec

4) Speed of TCP exchange between two iperf applicatons running on the same HP-UX server, default TCP window 512K: 5.70 Gbits/sec.

5) Speed of TCP exchange between two iperf applicatons running on the same Linux server, TCP window 512K: 7.06 Gbits/sec

6) Speed of TCP exchange between two iperf applicatons running on HP-UX and Linux, TCP window 512K: 699 Mbits/sec

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