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Cisco SFS InfiniBand Host Drivers User Guide for Linux
OL-12309-01
Chapter6 uDAPL
Step 3 View the Throughput test results from the server.
The following example shows the Throughput test results:
Created an EP with ep_handle = 0x2a95f8a300
queried max_recv_dtos = 256
queried max_request_dtos = 1024
Accept issued...
Received an event on ep_handle = 0x2a95f8a300
Context = 29a
Connected!
received rmr_context = 1b3b78 target_address = 95e3a000 segment_length = 40000
Sent 7759.462 Mb in 1.0 seconds throughput = 7741.811 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.583 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.499 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.753 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.885 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.800 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.769 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.769 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.707 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7741.703 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.260 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.283 Mb/sec
Sent 7759.462 Mb in 1.0 seconds throughput = 7742.483 Mb/sec
total secs 13 throughput 7742 Mb/sec
Received an event on ep_handle = 0x2a95f8a300
Context = 29a
The notable performance result in the example is Throughput as 7.7 gigabits per second.
uDAPL Latency Test Performance
The uDAPL Latency test measures half of the round-trip latency for uDAPL sends. To perform a uDAPL
Latency test performance, perform the following steps:
Step 1 Start the Latency test on the server host. The syntax for the server is as follows:
/usr/local/topspin/bin/lat_server.x device_name iterations msg_size 0:poll/1:event
The following example shows how to start the Latency test on the server host:
host1$ /usr/local/topspin/bin/lat_server.x ib0 200000 1 0
latency server started on ib0
•ib0 is the name of the device.
•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 2 Start the Latency test on the client.
The syntax for the client is as follows:
/usr/local/topspin/bin/lat_client.x device_name server_name iterations msg_size
0:poll/1:event
The following example shows how to start the Latency test on the client: