From d4522b8e9854178473adcea0fbb84f23f6e744bd Mon Sep 17 00:00:00 2001 From: Felipe Boeira Date: Tue, 8 Jan 2019 18:39:03 +0100 Subject: Initial commit --- src/tests/threads/mlfqs-recent-1.c | 144 +++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 src/tests/threads/mlfqs-recent-1.c (limited to 'src/tests/threads/mlfqs-recent-1.c') diff --git a/src/tests/threads/mlfqs-recent-1.c b/src/tests/threads/mlfqs-recent-1.c new file mode 100644 index 0000000..4258671 --- /dev/null +++ b/src/tests/threads/mlfqs-recent-1.c @@ -0,0 +1,144 @@ +/* Checks that recent_cpu is calculated properly for the case of + a single ready process. + + The expected output is this (some margin of error is allowed): + + After 2 seconds, recent_cpu is 6.40, load_avg is 0.03. + After 4 seconds, recent_cpu is 12.60, load_avg is 0.07. + After 6 seconds, recent_cpu is 18.61, load_avg is 0.10. + After 8 seconds, recent_cpu is 24.44, load_avg is 0.13. + After 10 seconds, recent_cpu is 30.08, load_avg is 0.15. + After 12 seconds, recent_cpu is 35.54, load_avg is 0.18. + After 14 seconds, recent_cpu is 40.83, load_avg is 0.21. + After 16 seconds, recent_cpu is 45.96, load_avg is 0.24. + After 18 seconds, recent_cpu is 50.92, load_avg is 0.26. + After 20 seconds, recent_cpu is 55.73, load_avg is 0.29. + After 22 seconds, recent_cpu is 60.39, load_avg is 0.31. + After 24 seconds, recent_cpu is 64.90, load_avg is 0.33. + After 26 seconds, recent_cpu is 69.27, load_avg is 0.35. + After 28 seconds, recent_cpu is 73.50, load_avg is 0.38. + After 30 seconds, recent_cpu is 77.60, load_avg is 0.40. + After 32 seconds, recent_cpu is 81.56, load_avg is 0.42. + After 34 seconds, recent_cpu is 85.40, load_avg is 0.44. + After 36 seconds, recent_cpu is 89.12, load_avg is 0.45. + After 38 seconds, recent_cpu is 92.72, load_avg is 0.47. + After 40 seconds, recent_cpu is 96.20, load_avg is 0.49. + After 42 seconds, recent_cpu is 99.57, load_avg is 0.51. + After 44 seconds, recent_cpu is 102.84, load_avg is 0.52. + After 46 seconds, recent_cpu is 106.00, load_avg is 0.54. + After 48 seconds, recent_cpu is 109.06, load_avg is 0.55. + After 50 seconds, recent_cpu is 112.02, load_avg is 0.57. + After 52 seconds, recent_cpu is 114.89, load_avg is 0.58. + After 54 seconds, recent_cpu is 117.66, load_avg is 0.60. + After 56 seconds, recent_cpu is 120.34, load_avg is 0.61. + After 58 seconds, recent_cpu is 122.94, load_avg is 0.62. + After 60 seconds, recent_cpu is 125.46, load_avg is 0.64. + After 62 seconds, recent_cpu is 127.89, load_avg is 0.65. + After 64 seconds, recent_cpu is 130.25, load_avg is 0.66. + After 66 seconds, recent_cpu is 132.53, load_avg is 0.67. + After 68 seconds, recent_cpu is 134.73, load_avg is 0.68. + After 70 seconds, recent_cpu is 136.86, load_avg is 0.69. + After 72 seconds, recent_cpu is 138.93, load_avg is 0.70. + After 74 seconds, recent_cpu is 140.93, load_avg is 0.71. + After 76 seconds, recent_cpu is 142.86, load_avg is 0.72. + After 78 seconds, recent_cpu is 144.73, load_avg is 0.73. + After 80 seconds, recent_cpu is 146.54, load_avg is 0.74. + After 82 seconds, recent_cpu is 148.29, load_avg is 0.75. + After 84 seconds, recent_cpu is 149.99, load_avg is 0.76. + After 86 seconds, recent_cpu is 151.63, load_avg is 0.76. + After 88 seconds, recent_cpu is 153.21, load_avg is 0.77. + After 90 seconds, recent_cpu is 154.75, load_avg is 0.78. + After 92 seconds, recent_cpu is 156.23, load_avg is 0.79. + After 94 seconds, recent_cpu is 157.67, load_avg is 0.79. + After 96 seconds, recent_cpu is 159.06, load_avg is 0.80. + After 98 seconds, recent_cpu is 160.40, load_avg is 0.81. + After 100 seconds, recent_cpu is 161.70, load_avg is 0.81. + After 102 seconds, recent_cpu is 162.96, load_avg is 0.82. + After 104 seconds, recent_cpu is 164.18, load_avg is 0.83. + After 106 seconds, recent_cpu is 165.35, load_avg is 0.83. + After 108 seconds, recent_cpu is 166.49, load_avg is 0.84. + After 110 seconds, recent_cpu is 167.59, load_avg is 0.84. + After 112 seconds, recent_cpu is 168.66, load_avg is 0.85. + After 114 seconds, recent_cpu is 169.69, load_avg is 0.85. + After 116 seconds, recent_cpu is 170.69, load_avg is 0.86. + After 118 seconds, recent_cpu is 171.65, load_avg is 0.86. + After 120 seconds, recent_cpu is 172.58, load_avg is 0.87. + After 122 seconds, recent_cpu is 173.49, load_avg is 0.87. + After 124 seconds, recent_cpu is 174.36, load_avg is 0.88. + After 126 seconds, recent_cpu is 175.20, load_avg is 0.88. + After 128 seconds, recent_cpu is 176.02, load_avg is 0.88. + After 130 seconds, recent_cpu is 176.81, load_avg is 0.89. + After 132 seconds, recent_cpu is 177.57, load_avg is 0.89. + After 134 seconds, recent_cpu is 178.31, load_avg is 0.89. + After 136 seconds, recent_cpu is 179.02, load_avg is 0.90. + After 138 seconds, recent_cpu is 179.72, load_avg is 0.90. + After 140 seconds, recent_cpu is 180.38, load_avg is 0.90. + After 142 seconds, recent_cpu is 181.03, load_avg is 0.91. + After 144 seconds, recent_cpu is 181.65, load_avg is 0.91. + After 146 seconds, recent_cpu is 182.26, load_avg is 0.91. + After 148 seconds, recent_cpu is 182.84, load_avg is 0.92. + After 150 seconds, recent_cpu is 183.41, load_avg is 0.92. + After 152 seconds, recent_cpu is 183.96, load_avg is 0.92. + After 154 seconds, recent_cpu is 184.49, load_avg is 0.92. + After 156 seconds, recent_cpu is 185.00, load_avg is 0.93. + After 158 seconds, recent_cpu is 185.49, load_avg is 0.93. + After 160 seconds, recent_cpu is 185.97, load_avg is 0.93. + After 162 seconds, recent_cpu is 186.43, load_avg is 0.93. + After 164 seconds, recent_cpu is 186.88, load_avg is 0.94. + After 166 seconds, recent_cpu is 187.31, load_avg is 0.94. + After 168 seconds, recent_cpu is 187.73, load_avg is 0.94. + After 170 seconds, recent_cpu is 188.14, load_avg is 0.94. + After 172 seconds, recent_cpu is 188.53, load_avg is 0.94. + After 174 seconds, recent_cpu is 188.91, load_avg is 0.95. + After 176 seconds, recent_cpu is 189.27, load_avg is 0.95. + After 178 seconds, recent_cpu is 189.63, load_avg is 0.95. + After 180 seconds, recent_cpu is 189.97, load_avg is 0.95. +*/ + +#include +#include "tests/threads/tests.h" +#include "threads/init.h" +#include "threads/malloc.h" +#include "threads/synch.h" +#include "threads/thread.h" +#include "devices/timer.h" + +/* Sensitive to assumption that recent_cpu updates happen exactly + when timer_ticks() % TIMER_FREQ == 0. */ + +void +test_mlfqs_recent_1 (void) +{ + int64_t start_time; + int last_elapsed = 0; + + ASSERT (thread_mlfqs); + + do + { + msg ("Sleeping 10 seconds to allow recent_cpu to decay, please wait..."); + start_time = timer_ticks (); + timer_sleep (DIV_ROUND_UP (start_time, TIMER_FREQ) - start_time + + 10 * TIMER_FREQ); + } + while (thread_get_recent_cpu () > 700); + + start_time = timer_ticks (); + for (;;) + { + int elapsed = timer_elapsed (start_time); + if (elapsed % (TIMER_FREQ * 2) == 0 && elapsed > last_elapsed) + { + int recent_cpu = thread_get_recent_cpu (); + int load_avg = thread_get_load_avg (); + int elapsed_seconds = elapsed / TIMER_FREQ; + msg ("After %d seconds, recent_cpu is %d.%02d, load_avg is %d.%02d.", + elapsed_seconds, + recent_cpu / 100, recent_cpu % 100, + load_avg / 100, load_avg % 100); + if (elapsed_seconds >= 180) + break; + } + last_elapsed = elapsed; + } +} -- cgit v1.2.1