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kernel / pub / scm / linux / kernel / git / axboe / fio / refs/heads/cpuclock-test
commita250edd0678ac6aef34bfbd01423a7b87a1d5f8d[log] [tgz]
authorJens Axboe <axboe@kernel.dk>Tue Oct 17 12:11:44 2017 -0600
committerJens Axboe <axboe@kernel.dk>Tue Oct 17 12:11:44 2017 -0600
treed50b43955067fad087627caa605d539928d7f52e
parentc13a60ce72aaf5b07b93977ab86e7522d167ec28 [diff]
gettime: improve cpu clock test

We're missing a synchronization before reading and comparing
with the current *t->seq in the loop. Rewrite the loop to
use compare-and-exchange for the increment, and ensure that
we have the proper synchronization inserted. This should both
be faster and more reliable.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 files changed
tree: d50b43955067fad087627caa605d539928d7f52e
  1. arch/
  2. compiler/
  3. crc/
  4. doc/
  5. engines/
  6. examples/
  7. exp/
  8. lib/
  9. os/
  10. oslib/
  11. profiles/
  12. t/
  13. tools/
  14. unit_tests/
  15. .gitignore
  16. .travis.yml
  17. appveyor.yml
  18. backend.c
  19. blktrace.c
  20. blktrace.h
  21. blktrace_api.h
  22. cairo_text_helpers.c
  23. cairo_text_helpers.h
  24. cconv.c
  25. cgroup.c
  26. cgroup.h
  27. client.c
  28. client.h
  29. configure
  30. COPYING
  31. debug.c
  32. debug.h
  33. diskutil.c
  34. diskutil.h
  35. err.h
  36. eta.c
  37. fifo.c
  38. fifo.h
  39. file.h
  40. filehash.c
  41. filehash.h
  42. filelock.c
  43. filelock.h
  44. filesetup.c
  45. FIO-VERSION-GEN
  46. fio.1
  47. fio.c
  48. fio.h
  49. fio_time.h
  50. flist.h
  51. flow.c
  52. flow.h
  53. gclient.c
  54. gclient.h
  55. gcompat.c
  56. gcompat.h
  57. gerror.c
  58. gerror.h
  59. gettime-thread.c
  60. gettime.c
  61. gettime.h
  62. GFIO-TODO
  63. gfio.c
  64. gfio.h
  65. ghelpers.c
  66. ghelpers.h
  67. goptions.c
  68. goptions.h
  69. graph.c
  70. graph.h
  71. hash.h
  72. helper_thread.c
  73. helper_thread.h
  74. helpers.c
  75. helpers.h
  76. HOWTO
  77. idletime.c
  78. idletime.h
  79. init.c
  80. io_ddir.h
  81. io_u.c
  82. io_u.h
  83. io_u_queue.c
  84. io_u_queue.h
  85. ioengines.c
  86. ioengines.h
  87. iolog.c
  88. iolog.h
  89. json.c
  90. json.h
  91. libfio.c
  92. log.c
  93. log.h
  94. Makefile
  95. memory.c
  96. minmax.h
  97. MORAL-LICENSE
  98. mutex.c
  99. mutex.h
  100. optgroup.c
  101. optgroup.h
  102. options.c
  103. options.h
  104. parse.c
  105. parse.h
  106. printing.c
  107. printing.h
  108. profile.c
  109. profile.h
  110. rate-submit.c
  111. rate-submit.h
  112. README
  113. REPORTING-BUGS
  114. SERVER-TODO
  115. server.c
  116. server.h
  117. smalloc.c
  118. smalloc.h
  119. stat.c
  120. stat.h
  121. STEADYSTATE-TODO
  122. steadystate.c
  123. steadystate.h
  124. td_error.c
  125. td_error.h
  126. thread_options.h
  127. tickmarks.c
  128. tickmarks.h
  129. time.c
  130. trim.c
  131. trim.h
  132. verify-state.h
  133. verify.c
  134. verify.h
  135. workqueue.c
  136. workqueue.h