Ntttcp Overview; Location Of Ntttcp - Qlogic 3000 Series User Manual

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For scripts, see the tools package included with the release.

ntttcp Overview

There are two switches on ntttcp that boost performance: -a and -rb.
ntttcp can be run without an optimal value for the -a switch and without the -rb
switch for the QLE3044.
When running ntttcp with the QLE3142, and in particular with fewer threads on
Windows Server, performance is limited by the receive window and by the
outstanding I/O (-a) value, regardless of hardware limitations.
For the receive side, the optimal value is 16 for -a and 512000 for -rb (or
something similar). With these values, a single thread should perform closer to a
multi-thread configuration. From a DOS command prompt, type the following
command. Note that the command must be executed from the same directory in
which the executable files are located.
ntttcpr -m 16,0,<rcv ipaddr> -n <# of tcp segs for snd/rcv> -a 16
For the transmit side, -a should be a value less than 8. The more threads, the
lower the value.
NOTE:
The send (transmit) and receive side ntttcp commands must use the
receive side's IP address.
NE0154601-00 A
5–Windows Server 2003 and 2008 Driver Installation and Configuration
Change the directory path to the location to where ntttcp was
downloaded or copied. An example directory tree is shown in
Figure 5-21.
Figure 5-21. Location of ntttcp
Windows Server Performance
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