tornado 并发性测试

server.py

import time
import tornado.web
import tornado.gen
import tornado.ioloop
from tornado import httpserver
from tornado.concurrent import run_on_executor
from concurrent.futures import ThreadPoolExecutor

class SyncHandler(tornado.web.RequestHandler):

    def get(self, *args, **kwargs):
        print("begin sync.")
        time.sleep(5)
        self.write("sync handler, hello.")


class AsyncHandler(tornado.web.RequestHandler):

    executor = ThreadPoolExecutor(5)

    @tornado.gen.coroutine
    def get(self):
        print("begin async.")
        result = yield self.core_process()
        self.write(result)

    @run_on_executor()
    def core_process(self):
        time.sleep(5)
        return 'asyn handler, hello.'


class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
            (r'/sync', SyncHandler),
            (r'/async', AsyncHandler)
        ]
        settings = dict(
            debug=True,
            template_path="templates",
            static_path="static"
        )
        super(Application, self).__init__(handlers, **settings)


application = Application()

if __name__ == "__main__":

    http_server = httpserver.HTTPServer(application)
    http_server.listen(10002)
    http_server.start(1) #启动进程数，window下只能是1
    tornado.ioloop.IOLoop.instance().start()

client.py

使用tomorrow模拟多线程并发访问

import requests
import time
from tomorrow import threads


@threads(10)
def sync_test():
    payload = {}
    headers = {}
    response = requests.request("GET", 'http://127.0.0.1:10002/sync', headers=headers, data=payload)
    print(response.text + '  ' + time.strftime('%H:%M:%S'))

@threads(10)
def async_test():
    payload = {}
    headers = {}
    response = requests.request("GET", 'http://10.1.15.24:10002/async', headers=headers, data=payload)
    print(response.text + '  ' + time.strftime('%H:%M:%S'))



[sync_test() for i in range(100)]
# [async_test() for i in range(50)]

同步输出结果，每5s只能处理一个请求

看以看到，10线程请求同步接口时候，是每隔5秒才能领处理完成一个请求。程序中设置的tornado进程是1，如果把tornado服务的进程数量提高为4，每5秒也能处理4个同步请求。

异步处理输出结果：

看以看到，10线程请求异步接口时候，是每隔5秒能处理5个请求，因为代码中设置的ThreadPoolExecutor(5)数量是5。如果设置为8，那么每5秒可以处理8个请求。

问题:对于异步处理和同步处理，同一个时间段发起的10个线程请求剩下的5个线程请求在下一个5秒是接着处理，还是丢弃了？