EEIC 3年次のオペレーションシステム演習。

• http://www.logos.t.u-tokyo.ac.jp/~tau/lecture/operating_systems/
• http://www.logos.t.u-tokyo.ac.jp/~tau/lecture/operating_systems/gen/ex/para_basic/

• 演習0

  • global, static 変数は共通。local 変数はスレッドごとに異なる。スレッド間の受け渡しは異なる論理アドレス

  • 結果は以下の通り

    thread id = 4463185920 thread id = 4463722496 thread id = 4465332224 thread id = 4464795648 thread id = 4464259072 g = 986b044 g = 986b044 g = 986b044 g = 986b044 g = 986b044 s = 986b040 s = 986b040 s = 986b040 s = 986b040 s = 986b040 x = a06cedc x = a0efedc x = a278edc x = a1f5edc x = a172edc y = 56395868 y = 56395878 y = 563958a8 y = 56395898 y = 56395888 OK: elapsed time: 0.000406

• 演習1, 2

  • 30 threads, 100K increment
  • pthread_mutex_lock: 7.197097 sec
  • __sync_fetch_and_add: 0.073962 sec

• 演習3

  • Assertion failed: (x != -1), function thread_func1, file pthread_queue.c, line 91. zsh: abort ./a.out