I'm trying to build the perftest C library to run some latency tests over the RDMA protocol.
My steps:
I downloaded the library from their GitHub and unzipped it on the box on which I want to run the server for the tests
I executed:
./autogen
./configure
make clean && make V=1
I tried to run a test
./ib_send_lat --duration=30 -H
..but I get the following error:
Port number 1 state is Down
Couldn't set the link layer
Couldn't get context for the device
What am I doing wrong?
Running other tests that use the RDMA protocol (eg. the ones in Accelio) the system shows no problems.
Also, I runned a few diagnostic tools and everything seems configured correctly already:
Verified that RDMA devices can be accessed (the second one says PORT_ACTIVE)
Verified that traffic over RDMA is working sending messages from a client to a server using rping
Any suggestions? (I opened an issue on their GitHub but I got no reply yet)
Thanks
I suspect the problem is the perftest tools are defaulting to using the device that's in the PORT_DOWN state.
Try specifying the specific device to use with the '-d' option. eg:
ib_send_lat -d mlx5_0 ...
(This will probably need to be done on both sides of the link.)