Big Sky :: tthttpd(tinytinyhttpd)のmingw32ビルドがまれに落ちる原因が分かった。

久々tthttpd(tinytinyhttpd)を触っていて、動いてるだろうと思ってたkeep-aliveのコードが動いていなかった事に愕然としながら修正してたら、以前smegheadさんが報告してくれていたmingw32で落ちる問題の原因を発見。
記憶の底で、_beginthread()したらCloseHandle()しなきゃいねないと思い込んでいたんですが、どうやら_beginthread()じゃなくて_beginthreadex()の場合だけだった(参照)。_beginthread()の場合はスレッド終了時にリソース回収されるらしい。
他いろいろと修正してkeep-aliveが動くようになり、ベンチマーク取ってみた。
テストは「helloworld」と書かれたhello.txtをabでGETする物。

まずはconnection closeの場合

This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests

Server Software:
Server Hostname:        localhost
Server Port:            8080

Document Path:          /hello.txt
Document Length:        11 bytes

Concurrency Level:      10
Time taken for tests:   0.993 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      160000 bytes
HTML transferred:       11000 bytes
Requests per second:    1006.77 [#/sec] (mean)
Time per request:       9.933 [ms] (mean)
Time per request:       0.993 [ms] (mean, across all concurrent requests)
Transfer rate:          157.31 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       1
Processing:     1   10  13.0      6     128
Waiting:        0   10  12.9      6     128
Total:          2   10  13.0      6     129

Percentage of the requests served within a certain time (ms)
  50%      6
  66%      7
  75%      7
  80%      7
  90%     15
  95%     31
  98%     59
  99%     86
100%    129 (longest request)

そしてconnection keep-aliveの場合

This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests

Server Software:
Server Hostname:        localhost
Server Port:            8080

Document Path:          /hello.txt
Document Length:        11 bytes

Concurrency Level:      10
Time taken for tests:   0.559 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    1000
Total transferred:      185472 bytes
HTML transferred:       11088 bytes
Requests per second:    1789.60 [#/sec] (mean)
Time per request:       5.588 [ms] (mean)
Time per request:       0.559 [ms] (mean, across all concurrent requests)
Transfer rate:          324.14 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       1
Processing:     0    6  19.7      1     263
Waiting:        0    5  19.0      0     262
Total:          0    6  19.8      1     263

Percentage of the requests served within a certain time (ms)
  50%      1
  66%      4
  75%      4
  80%      4
  90%     11
  95%     22
  98%     46
  99%     80
100%    263 (longest request)

ちなみに同じマシン(Ubuntu9.10 on CeleronM 1.5GHz 500M)で取ったapache2のベンチ。

This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests

Server Software:        Apache/2.2.11
Server Hostname:        localhost
Server Port:            80

Document Path:          /~mattn/hello.txt
Document Length:        11 bytes

Concurrency Level:      10
Time taken for tests:   0.771 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    1000
Total transferred:      464920 bytes
HTML transferred:       11000 bytes
Requests per second:    1297.49 [#/sec] (mean)
Time per request:       7.707 [ms] (mean)
Time per request:       0.771 [ms] (mean, across all concurrent requests)
Transfer rate:          589.09 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.5      0       7
Processing:     6    8   3.3      7      28
Waiting:        6    7   3.1      6      27
Total:          6    8   3.3      7      28

Percentage of the requests served within a certain time (ms)
  50%      7
  66%      7
  75%      7
  80%      7
  90%     12
  95%     16
  98%     18
  99%     27
100%     28 (longest request)

あまりパフォーマンスは意識してなかった割には、まぁまぁな速度(Request per secondでapache2の1.5倍速くらい？)が出たんじゃないかと思います。ただ機能も小さいですしapacheにも幾らかモジュールが入っちゃってますから参考値にしかすぎませんが...
とりあえずmingw32で不意に落ちる問題が解決したのでこれからパフォーマンスも気にしながらやって行こうかなーと思います。