selftests: concurrency: add test to verify parallel rules insertion

Implement test that verifies parallel rules insertion by adding 1 million
flower filters with 10 concurrent tc instances. Put it to standalone
'concurrency' category.

Implement tdc_multibatch.py helper script that is used to generate multiple
batch files for concurrent tc execution. Extend config with new 'BATCH_DIR'
variable to specify temporary output directory that is used to store batch
files generated by tdc_multibatch.py.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/tdc_config.py

@@ -15,6 +15,7 @@ NAMES = {
           'DEV1': 'v0p1',
           'DEV2': '',
           'BATCH_FILE': './batch.txt',
+          'BATCH_DIR': 'tmp',
           # Length of time in seconds to wait before terminating a command
           'TIMEOUT': 12,
           # Name of the namespace to use