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#!/usr/bin/env python3
# Copyright (c) 2021 Graphiant, Inc.
import unittest
from asfframework import VppAsfTestCase, VppTestRunner
from vpp_policer import VppPolicer
# Default for the tests is 10s of "Green" packets at 8Mbps, ie. 10M bytes.
# The policer helper CLI "sends" 500 byte packets, so default is 20000.
TEST_RATE = 8000 # kbps
TEST_BURST = 10000 # ms
CIR_OK = 8500 # CIR in kbps, above test rate
CIR_LOW = 7000 # CIR in kbps, below test rate
EIR_OK = 9000 # EIR in kbps, above test rate
EIR_LOW = 7500 # EIR in kbps, below test rate
NUM_PKTS = 20000
CBURST = 100000 # Committed burst in bytes
EBURST = 200000 # Excess burst in bytes
class TestPolicer(VppAsfTestCase):
"""Policer Test Case"""
def run_policer_test(
self, type, cir, cb, eir, eb, rate=8000, burst=10000, colour=0
):
"""
Configure a Policer and push traffic through it.
"""
types = {
"1R2C": 0,
"1R3C": 1,
"2R3C": 3,
}
pol_type = types.get(type)
policer = VppPolicer(
self,
"pol1",
cir,
eir,
cb,
eb,
rate_type=0,
type=pol_type,
color_aware=colour,
)
policer.add_vpp_config()
error = self.vapi.cli(
f"test policing index {policer.policer_index} rate {rate} "
f"burst {burst} colour {colour}"
)
stats = policer.get_stats()
policer.remove_vpp_config()
return stats
def test_policer_1r2c(self):
"""Single rate, 2 colour policer"""
stats = self.run_policer_test("1R2C", CIR_OK, CBURST, 0, 0)
self.assertEqual(stats["conform_packets"], NUM_PKTS)
stats = self.run_policer_test("1R2C", CIR_LOW, CBURST, 0, 0)
self.assertLess(stats["conform_packets"], NUM_PKTS)
self.assertEqual(stats["exceed_packets"], 0)
self.assertGreater(stats["violate_packets"], 0)
stats = self.run_policer_test("1R2C", CIR_LOW, CBURST, 0, 0, colour=2)
self.assertEqual(stats["violate_packets"], NUM_PKTS)
def test_policer_1r3c(self):
"""Single rate, 3 colour policer"""
stats = self.run_policer_test("1R3C", CIR_OK, CBURST, 0, 0)
self.assertEqual(stats["conform_packets"], NUM_PKTS)
stats = self.run_policer_test("1R3C", CIR_LOW, CBURST, 0, EBURST)
self.assertLess(stats["conform_packets"], NUM_PKTS)
self.assertGreater(stats["exceed_packets"], 0)
self.assertGreater(stats["violate_packets"], 0)
stats = self.run_policer_test("1R3C", CIR_LOW, CBURST, 0, EBURST, colour=1)
self.assertEqual(stats["conform_packets"], 0)
self.assertGreater(stats["exceed_packets"], 0)
self.assertGreater(stats["violate_packets"], 0)
stats = self.run_policer_test("1R3C", CIR_LOW, CBURST, 0, EBURST, colour=2)
self.assertEqual(stats["violate_packets"], NUM_PKTS)
def test_policer_2r3c(self):
"""Dual rate, 3 colour policer"""
stats = self.run_policer_test("2R3C", CIR_OK, CBURST, EIR_OK, EBURST)
self.assertEqual(stats["conform_packets"], NUM_PKTS)
stats = self.run_policer_test("2R3C", CIR_LOW, CBURST, EIR_OK, EBURST)
self.assertLess(stats["conform_packets"], NUM_PKTS)
self.assertGreater(stats["exceed_packets"], 0)
self.assertEqual(stats["violate_packets"], 0)
stats = self.run_policer_test("2R3C", CIR_LOW, CBURST, EIR_LOW, EBURST)
self.assertLess(stats["conform_packets"], NUM_PKTS)
self.assertGreater(stats["exceed_packets"], 0)
self.assertGreater(stats["violate_packets"], 0)
stats = self.run_policer_test("2R3C", CIR_LOW, CBURST, EIR_OK, EBURST, colour=1)
self.assertEqual(stats["exceed_packets"], NUM_PKTS)
stats = self.run_policer_test(
"2R3C", CIR_LOW, CBURST, EIR_LOW, EBURST, colour=1
)
self.assertEqual(stats["conform_packets"], 0)
self.assertGreater(stats["exceed_packets"], 0)
self.assertGreater(stats["violate_packets"], 0)
stats = self.run_policer_test("2R3C", CIR_LOW, CBURST, EIR_OK, EBURST, colour=2)
self.assertEqual(stats["violate_packets"], NUM_PKTS)
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
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