selftests: nic_performance: Add selftest for performance of NIC driver

Add selftest case to check the send and receive throughput.
Supported link modes between local NIC driver and partner
are varied. Then send and receive throughput is captured
and verified. Test uses iperf3 tool.
Add iperf3 server/client function in GenerateTraffic class.

Signed-off-by: Mohan Prasad J <mohan.prasad@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/tools/testing/selftests/drivers/net/lib/py/load.py b/tools/testing/selftests/drivers/net/lib/py/load.py
index d9c10613ae67..da5af2c680fa 100644
--- a/tools/testing/selftests/drivers/net/lib/py/load.py
+++ b/tools/testing/selftests/drivers/net/lib/py/load.py
@@ -2,7 +2,7 @@
 
 import time
 
-from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen
+from lib.py import ksft_pr, cmd, ip, rand_port, wait_port_listen, bkg
 
 class GenerateTraffic:
     def __init__(self, env, port=None):
@@ -23,6 +23,24 @@ class GenerateTraffic:
             self.stop(verbose=True)
             raise Exception("iperf3 traffic did not ramp up")
 
+    def run_remote_test(self, env: object, port=None, command=None):
+        if port is None:
+            port = rand_port()
+        try:
+            server_cmd = f"iperf3 -s 1 -p {port} --one-off"
+            with bkg(server_cmd, host=env.remote):
+                #iperf3 opens TCP connection as default in server
+                #-u to be specified in client command for UDP
+                wait_port_listen(port, host=env.remote)
+        except Exception as e:
+            raise Exception(f"Unexpected error occurred while running server command: {e}")
+        try:
+            client_cmd = f"iperf3 -c {env.remote_addr} -p {port} {command}"
+            proc = cmd(client_cmd)
+            return proc
+        except Exception as e:
+            raise Exception(f"Unexpected error occurred while running client command: {e}")
+
     def _wait_pkts(self, pkt_cnt=None, pps=None):
         """
         Wait until we've seen pkt_cnt or until traffic ramps up to pps.