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import stl_path
from trex_stl_lib.api import *
import time
import pprint
def rx_example (tx_port, rx_port, burst_size, bw):
print("\nGoing to inject {0} packets on port {1} - checking RX stats on port {2}\n".format(burst_size, tx_port, rx_port))
# create client
c = STLClient()
passed = True
try:
pkt = STLPktBuilder(pkt = Ether()/IP(src="16.0.0.1",dst="48.0.0.1")/UDP(dport=12,sport=1025)/'at_least_16_bytes_payload_needed')
total_pkts = burst_size
s1 = STLStream(name = 'rx',
packet = pkt,
flow_stats = STLFlowLatencyStats(pg_id = 5),
mode = STLTXSingleBurst(total_pkts = total_pkts,
percentage = bw))
# connect to server
c.connect()
# prepare our ports
c.reset(ports = [tx_port, rx_port])
# add both streams to ports
c.add_streams([s1], ports = [tx_port])
print("\nInjecting {0} packets on port {1}\n".format(total_pkts, tx_port))
rc = rx_iteration(c, tx_port, rx_port, total_pkts, pkt.get_pkt_len(), bw)
if not rc:
passed = False
except STLError as e:
passed = False
print(e)
finally:
c.disconnect()
if passed:
print("\nTest has passed :-)\n")
else:
print("\nTest has failed :-(\n")
# RX one iteration
def rx_iteration (c, tx_port, rx_port, total_pkts, pkt_len, bw):
c.clear_stats()
c.start(ports = [tx_port])
c.wait_on_traffic(ports = [tx_port])
stats = c.get_stats()
flow_stats = stats['flow_stats'].get(5)
lat_stats = stats['latency'].get(5)
if not flow_stats:
print("no flow stats available")
return False
if not lat_stats:
print("no latency stats available")
return False
tx_pkts = flow_stats['tx_pkts'].get(tx_port, 0)
tx_bytes = flow_stats['tx_bytes'].get(tx_port, 0)
rx_pkts = flow_stats['rx_pkts'].get(rx_port, 0)
drops = lat_stats['err_cntrs']['dropped']
ooo = lat_stats['err_cntrs']['out_of_order']
dup = lat_stats['err_cntrs']['dup']
sth = lat_stats['err_cntrs']['seq_too_high']
stl = lat_stats['err_cntrs']['seq_too_low']
lat = lat_stats['latency']
jitter = lat['jitter']
avg = lat['average']
tot_max = lat['total_max']
last_max = lat['last_max']
hist = lat ['histogram']
if c.get_warnings():
print("\n\n*** test had warnings ****\n\n")
for w in c.get_warnings():
print(w)
return False
print('Error counters: dropped:{0}, ooo:{1} dup:{2} seq too high:{3} seq too low:{4}'.format(drops, ooo, dup, sth, stl))
print('Latency info:')
print(" Maximum latency(usec): {0}".format(tot_max))
print(" Maximum latency in last sampling period (usec): {0}".format(last_max))
print(" Average latency(usec): {0}".format(avg))
print(" Jitter(usec): {0}".format(jitter))
print(" Latency distribution histogram:")
hist.sort()
for sample in hist:
range_start = sample['key']
if range_start == 0:
range_end = 10
else:
range_end = range_start + pow(10, (len(str(range_start))-1))
val = sample['val']
print (" Packets with latency between {0} and {1}:{2} ".format(range_start, range_end, val))
if tx_pkts != total_pkts:
print("TX pkts mismatch - got: {0}, expected: {1}".format(tx_pkts, total_pkts))
pprint.pprint(flow_stats)
return False
else:
print("TX pkts match - {0}".format(tx_pkts))
if tx_bytes != (total_pkts * pkt_len):
print("TX bytes mismatch - got: {0}, expected: {1}".format(tx_bytes, (total_pkts * pkt_len)))
pprint.pprint(flow_stats)
return False
else:
print("TX bytes match - {0}".format(tx_bytes))
if rx_pkts != total_pkts:
print("RX pkts mismatch - got: {0}, expected: {1}".format(rx_pkts, total_pkts))
pprint.pprint(flow_stats)
return False
else:
print("RX pkts match - {0}".format(rx_pkts))
return True
# run the tests
rx_example(tx_port = 1, rx_port = 0, burst_size = 500000, bw = 50)
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