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test-drop-macswap.py
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test-drop-macswap.py
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#!/usr/bin/python3
import os
import subprocess
import time
curdir = os.path.dirname(__file__)
TESTER = '[email protected]'
IFNAME = 'ens1f0'
MOONGEN_PATH = '~/Federico/MoonGen/build/MoonGen'
APP_NAME = 'macswap'
APP_PATH = f'{curdir}/../examples/{APP_NAME}/{APP_NAME}'
PKTGEN_SCRIPT_PATH = '~/Federico/MoonGen/examples/gen-traffic.lua'
RES_FILENAME = 'res-drop-macswap.csv'
RUNS = 5
RETRIES = 10
TRIAL_TIME = 10 # Seconds of a single test trial
FINAL_TRIAL_TIME = 30
TESTS_GAP = 5 # Seconds of gap between two tests
MODES = ['xdp', 'af_xdp', 'af_xdp-bp', 'af_xdp-poll',
'combined-bp', 'combined-poll']
FLAGS = {
'xdp': ['-M', 'XDP'],
'af_xdp': [],
'af_xdp-bp': ['-B'],
'af_xdp-poll': ['-p'],
'combined': ['-M', 'COMBINED'],
'combined-bp': ['-M', 'COMBINED', '-B'],
'combined-poll': ['-M', 'COMBINED', '-p']
}
MAX_TARGET = 20000
TARGET_STEP = 50
MAX_LOSS = 0.001
PERF_COUNTERS = ['LLC-loads', 'LLC-load-misses', 'LLC-stores',
'LLC-store-misses']
PERF_TIME = 10 # Seconds
def round_target(target):
return int(target / TARGET_STEP) * TARGET_STEP
def get_rcvd_pkts():
cmd = ['pidof', APP_NAME]
ret = subprocess.run(cmd, capture_output=True, text=True)
cmd = ['sudo', 'kill', '-SIGUSR1', str(int(ret.stdout))]
ret = subprocess.run(cmd)
time.sleep(1)
ret = int(open("stats.txt", "r").readline())
return ret
def get_pktgen_stats():
cmd = ['scp', f'{TESTER}:./tmp.csv' , '.']
subprocess.run(cmd, check=True, stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
f = open("tmp.csv", "r")
ret = f.read().splitlines()[1].split(';')
f.close()
return ret[0], int(ret[1])
out = open(RES_FILENAME, 'w')
out.write("run,mode,throughput,target,llc-loads,llc-load-misses,llc-store,llc-store-misses,user,system,softirq,verified\n")
for run in range(RUNS):
for mode in MODES:
print(f'Run {run}: measuring mode {mode}...')
if mode == 'af_xdp-bp' or mode == 'combined-bp':
# Enable busy polling
cmd = ['sudo', 'tee',
f'/sys/class/net/{IFNAME}/napi_defer_hard_irqs']
subprocess.run(cmd, check=True, text=True, input='2',
stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
cmd = ['sudo', 'tee',
f'/sys/class/net/{IFNAME}/gro_flush_timeout']
subprocess.run(cmd, check=True, text=True, input='200000',
stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
cmd = ['taskset', '1', 'sudo', APP_PATH, '-i', IFNAME] + FLAGS[mode] \
+ ['--', '-q', '-c', 'DROP']
app = subprocess.Popen(cmd, stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
max_t = MAX_TARGET
former_rx_pkts = 0
total_rx_pkts = 0
for retry in range(RETRIES):
print(f'Trial {retry}')
min_t = 0
curr_t = max_t
best_t = 0
best_r = 0
while max_t - min_t > TARGET_STEP:
print(f'Target {curr_t} Mbps')
cmd = ['ssh', TESTER, 'sudo', MOONGEN_PATH, PKTGEN_SCRIPT_PATH,
'0', '0', '-c', '6', '-o', 'tmp.csv', '-r', str(curr_t),
'-t', str(TRIAL_TIME)]
subprocess.run(cmd, check=True, stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
rate, tx_pkts = get_pktgen_stats()
total_rx_pkts = get_rcvd_pkts()
rx_pkts = total_rx_pkts - former_rx_pkts
former_rx_pkts = total_rx_pkts
loss = (tx_pkts - rx_pkts) / tx_pkts
print(f'Sent {tx_pkts}, received {rx_pkts}, rate {rate} Mpps, loss {(loss*100):.2f}%')
if loss <= MAX_LOSS:
best_t = curr_t
best_r = rate
min_t = curr_t
else:
max_t = curr_t
curr_t = round_target((max_t + min_t) / 2)
# Perform the cache run
print('Checking result, cache and CPU...')
cmd = ['ssh', TESTER, 'sudo', MOONGEN_PATH, PKTGEN_SCRIPT_PATH, '0',
'0', '-c', '6', '-o', 'tmp.csv', '-r', str(best_t), '-t',
str(FINAL_TRIAL_TIME)]
pktgen = subprocess.Popen(cmd, stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
time.sleep(5)
# Collect cache statistics
cmd = ['sudo', 'perf', 'stat', '-C', '0', '--no-big-num', '-e',
','.join(PERF_COUNTERS), 'sleep', str(PERF_TIME)]
res = subprocess.run(cmd, check=True, capture_output=True,
text=True).stderr
reslines = res.splitlines()
loads = int(int(reslines[3].split()[0]) / PERF_TIME)
load_misses = int(int(reslines[4].split()[0]) / PERF_TIME)
stores = int(int(reslines[5].split()[0]) / PERF_TIME)
store_misses = int(int(reslines[6].split()[0]) / PERF_TIME)
# Collect CPU statistics
cmd = ['sar', '-P', '0', '-u', 'ALL', '10', '1']
res = subprocess.run(cmd, check=True, capture_output=True,
text=True).stdout
resline = res.splitlines()[3]
user = float(resline.split()[3])
system = float(resline.split()[5])
softirq = float(resline.split()[9])
pktgen.wait()
rate, tx_pkts = get_pktgen_stats()
total_rx_pkts = get_rcvd_pkts()
rx_pkts = total_rx_pkts - former_rx_pkts
former_rx_pkts = total_rx_pkts
loss = (tx_pkts - rx_pkts) / tx_pkts
if loss <= MAX_LOSS:
verified = True
else:
verified = False
print(f'Target {best_t} Mbps, throughput: {best_r} Mpps, {"VERIFIED" if verified else f"NOT VERIFIED (lost {loss*100:.2f}%)"}, User {user:.2f}%, System {system:.2f}%, SoftIRQ {softirq:.2f}%\n')
if verified:
break
else:
max_t = best_t - TARGET_STEP
time.sleep(TESTS_GAP)
cmd = ['sudo', 'killall', APP_NAME]
subprocess.run(cmd, check=True)
out.write(f'{run},{mode},{best_r},{best_t},{loads},{load_misses},{stores},{store_misses},{user},{system},{softirq},{verified}\n')
out.flush()
if mode == 'af_xdp-bp' or mode == 'combined-bp':
# Disable busy polling
cmd = ['sudo', 'tee',
f'/sys/class/net/{IFNAME}/napi_defer_hard_irqs']
subprocess.run(cmd, check=True, text=True, input='0',
stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
cmd = ['sudo', 'tee',
f'/sys/class/net/{IFNAME}/gro_flush_timeout']
subprocess.run(cmd, check=True, text=True, input='0',
stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
time.sleep(TESTS_GAP)
out.close()