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import asyncio
import time
import os
from statistics import mean
from mitmproxy import ctx
from mitmproxy.io import db
from mitmproxy.test import tflow
class StreamTester:
"""
Generates a constant stream of flows and
measure protobuf dumping throughput.
"""
def __init__(self):
self.loop = asyncio.get_event_loop()
self.queue = asyncio.Queue(loop=self.loop)
self.dbh = None
self.streaming = False
self.tf = None
self.out = None
self.hot_flows = []
self.results = []
self._fflushes = 0
self._stream_period = 0.001
self._flush_period = 3.0
self._flush_rate = 150
def load(self, loader):
loader.add_option(
"testflow_size",
int,
1000,
"Length in bytes of test flow content"
)
loader.add_option(
"benchmark_save_path",
str,
"/tmp/stats",
"Destination for the stats result file"
)
def running(self):
if not self.streaming:
ctx.log("<== Serialization Benchmark Enabled ==>")
self.tf = tflow.tflow()
self.tf.request.content = b'A' * ctx.options.testflow_size
ctx.log(f"With content size: {len(self.tf.request.content)} B")
self.dbh = db.DBHandler("/tmp/temp.sqlite", mode='write')
self.out = open(ctx.options.benchmark_save_path, "w")
self.streaming = True
self.loop.create_task(asyncio.gather(self.writer(), self.stream(), self.stats()))
async def stream(self):
while True:
await self.queue.put(self.tf)
await asyncio.sleep(self._stream_period)
async def writer(self):
while True:
await asyncio.sleep(self._flush_period)
count = 1
f = await self.queue.get()
self.hot_flows.append(f)
while not self.queue.empty() and count < self._flush_rate:
try:
self.hot_flows.append(self.queue.get_nowait())
count += 1
except asyncio.QueueEmpty:
pass
start = time.perf_counter()
n = self._fflush()
end = time.perf_counter()
self.out.write(f"dumps/time ratio: {n} / {end-start} -> {n/(end-start)}\n")
self.results.append(n / (end - start))
self._fflushes += 1
ctx.log(f"Flushes: {self._fflushes}")
async def stats(self):
while True:
await asyncio.sleep(1.0)
if self._fflushes == 21:
self.out.write(f"AVG : {mean(self.results)}\n")
ctx.log(f"<== Benchmark Ended. Collect results at {ctx.options.benchmark_save_path} ==>")
self.out.close()
del self.dbh
os.remove("/tmp/temp.sqlite")
ctx.master.shutdown()
def _fflush(self):
self.dbh.store(self.hot_flows)
n = len(self.hot_flows)
self.hot_flows = []
return n
addons = [
StreamTester()
]
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