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版本 01bb1020630e93b39bf9b401a9a9ac9312d6f980

2016q1 Homework #3

預期目標

  • 學習多執行緒程式開發
  • 應用物件導向程式開發方法
  • 透過 Doxygen 自動建立技術文件
  • 培養專業程式開發風格

預先安裝的套件

$ sudo apt-get install apache2-utils check
$ sudo apt-get install doxygen graphviz

Server Framework in modern C

$ git clone https://github.com/embedded2016/server-framework.git
$ cd server-framework
$ make
$ ./test-async
- 預期將看到類似以下輸出:
wrote task 8190
wrote task 8191
Hi! 16377
Hi! 16378
# signal finish at (711.426132) ms
# elapsed time: (711.728594) ms
$ ./test-reactor
- 預期將看到以下訊息:
Serving HTTP on 127.0.0.1 port 8080
now open up the URL http://localhost:8080 on your browser
- 依據指示,在網頁瀏覽器裡頭打開網址 `http://localhost:8080`,將會看到 "Hello World!" 字樣
- 回到原本執行 `./test-reactor` 的終端機視窗,按下 `Ctrl-C` 以結束程式
$ ./test-protocol-server
- 預期將看到類似以下訊息:
(pid 4130 : 8 threads) Listening on port 8080 (max sockets: 65536, ~5 used)
- 這時再次透過網頁瀏覽器開啟網址 `http://localhost:8080`,可以發現原本終端機印出類似以下訊息:
A connection was accepted on socket #7.
A connection was accepted on socket #8.
Socket #7 is now disconnected.
Socket #8 is now disconnected.
- 重複上述動作幾次,又會看到新的訊息,指出 socket 編號的更動

測試網頁伺服器的效能

  • 確保之前的測試程式均已關閉,而且 port 8080 沒被佔用
    • 可透過 $ pkill -9 httpd 來強制關閉伺服器
  • 執行 $ ./httpd,預期將看到類似以下輸出:
(pid 4223 : 1 threads) Listening on port 8080 (max sockets: 65536, ~5 used)
Clients: 0
# Total Clients: 0
  • 不要關閉執行 httpd 的終端機視窗,為了後續說明方面,我們稱為這個終端機畫面為「伺服器」
  • 開啟新的終端機視窗,並執行以下指令:
$ ab -c 32 -n 100 http://localhost:8080/
- 預期將看到以下輸出,請抱持耐心,等待且不要執行其他程式
This is ApacheBench, Version 2.3 <$Revision: 1706008 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
- 等待一陣子之後,會看到類似以下輸出:
Concurrency Level:      32
Time taken for tests:   15.621 seconds
Complete requests:      100
Failed requests:        6
   (Connect: 0, Receive: 0, Length: 6, Exceptions: 0)
Total transferred:      9900 bytes
HTML transferred:       1300 bytes
Requests per second:    6.40 [#/sec] (mean)
Time per request:       4998.873 [ms] (mean)
Time per request:       156.215 [ms] (mean, across all concurrent requests)
Transfer rate:          0.62 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    2   0.7      2       3
Processing:  3619 3877 177.2   3996    4001
Waiting:        0    1   0.5      0       3
Total:       3621 3879 177.2   3998    4001