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Cisco SFS InfiniBand Host Drivers User Guide for Linux
OL-12309-01
Chapter 6 uDAPL
host2$ /usr/local/topspin/bin/lat_client.x ib0 192.168.0.1 200000 1 0
• ib0 is the name of the device.
• 192.168.0.1 is the IPoIB address of the server host.
• 200000 is the number of RDMAs to perform for the test.
• 1 is the size in bytes of the RDMA WRITE.
• 0 is a flag specifying whether polling or event should be used. 0 signifies polling, and 1 signifies
events.
Step 3 View the Latency results.
The following example is a display of the Latency test results:
Server Name: 192.168.0.1
Server Net Address: 192.168.0.1
Connection Event: Received the correct event
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Latency: 6.5 us
Average latency: 6.5 us
Connection Event: Received the correct event
closing IA...
Exiting program...
The notable performance value in the example above is Latency result that is 6.5 microseconds.
Compiling uDAPL Programs
This section provides information on how to compile uDAPL programs. Compiling uDAPL applications
from source code requires use of the uDAPL header files and libraries included with the drivers.
Sample makefiles and C coder are in /usr/local/topspin/examples/dapl.