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Re: [RFC PATCH 3/3] test-lib: add the '--stress' option to run a test repeatedly under load

From
Jeff King <peff@peff.net>
Date
Dec 5, 2018, 05:46 UTC
Message-ID
<20181205054637.GF12284@sigill.intra.peff.net>
In-Reply-To
<87o9a1z0j5.fsf@evledraar.gmail.com>
On Tue, Dec 04, 2018 at 06:04:14PM +0100, Ævar Arnfjörð Bjarmason wrote:
Show 11 quoted lines
> 
> On Tue, Dec 04 2018, SZEDER Gábor wrote:
> 
> > The number of parallel invocations is determined by, in order of
> > precedence: the number specified as '--stress=<N>', or the value of
> > the GIT_TEST_STRESS_LOAD environment variable, or twice the number of
> > available processors in '/proc/cpuinfo', or 8.
> 
> With this series we have at least 3 ways to get this number. First
> online_cpus() in the C code, then Peff's recent `getconf
> _NPROCESSORS_ONLN` in doc-diff, and now this /proc/cpuinfo parsing.

To be fair, I only added the "getconf" thing because somebody complained that I was parsing /proc/cpuinfo, and suggested it instead. ;)

I don't think it's especially portable, but it should work on Linux and modern BSD/macOS, which may be enough (unlike doc-diff, I'd be a little more inclined to ask somebody on a random platform to stress test if they're hitting a bug).

> Perhaps it makes sense to split online_cpus() into a helper to use from
> the shellscripts instead?

I think somebody proposed that in a recent thread for other reasons, too. I'd be OK with that, but probably just using getconf is reasonable in the meantime.

-Peff
Previous: SZEDER GáborNext: Ævar Arnfjörð Bjarmason
Message 11 of 67 in “test-lib: add the '--stress' option to help reproduce occasional failures in flaky tests”
  1. 0/3 test-lib: add the '--stress' option to help reproduce occasional failures in flaky testsSZEDER Gábor, Dec 4, 2018
  2. 1/3 test-lib: consolidate naming of test-results pathsSZEDER Gábor, Dec 4, 2018
  3. Jeff KingDec 5, 2018
  4. 2/3 test-lib-functions: introduce the 'test_set_port' helper functionSZEDER Gábor, Dec 4, 2018
  5. Jeff KingDec 5, 2018
  6. SZEDER GáborDec 5, 2018
  7. Jeff KingDec 5, 2018
  8. 3/3 test-lib: add the '--stress' option to run a test repeatedly under loadSZEDER Gábor, Dec 4, 2018
  9. Ævar Arnfjörð BjarmasonDec 4, 2018
  10. SZEDER GáborDec 4, 2018
  11. Jeff KingDec 5, 2018
  12. Ævar Arnfjörð BjarmasonDec 4, 2018
  13. Jeff KingDec 5, 2018
  14. SZEDER GáborDec 5, 2018
  15. Ævar Arnfjörð BjarmasonDec 5, 2018
  16. SZEDER GáborDec 5, 2018
  17. Ævar Arnfjörð BjarmasonDec 5, 2018
  18. Jeff KingDec 5, 2018
  19. SZEDER GáborDec 5, 2018
  20. Jeff KingDec 5, 2018
  21. Junio C HamanoDec 6, 2018
  22. Jeff KingDec 6, 2018
  23. Junio C HamanoDec 6, 2018
  24. SZEDER GáborDec 6, 2018
  25. Jeff KingDec 7, 2018
  26. SZEDER GáborDec 5, 2018
  27. Jeff KingDec 5, 2018
  28. SZEDER GáborDec 6, 2018
  29. Jeff KingDec 7, 2018
  30. 0/7 test-lib: add the '--stress' option to help reproduce occasional failures in flaky testsSZEDER Gábor, Dec 9, 2018
  31. 2/7 test-lib: parse some --options earlierSZEDER Gábor, Dec 9, 2018
  32. Jeff KingDec 11, 2018
  33. SZEDER GáborDec 11, 2018
  34. Jeff KingDec 17, 2018
  35. SZEDER GáborDec 30, 2018
  36. Jeff KingJan 3, 2019
  37. 1/7 test-lib: translate SIGTERM and SIGHUP to an exitSZEDER Gábor, Dec 9, 2018
  38. Jeff KingDec 11, 2018
  39. 4/7 test-lib: set $TRASH_DIRECTORY earlierSZEDER Gábor, Dec 9, 2018
  40. 5/7 test-lib: extract Bash version check for '-x' tracingSZEDER Gábor, Dec 9, 2018
  41. 3/7 test-lib: consolidate naming of test-results pathsSZEDER Gábor, Dec 9, 2018
  42. 6/7 test-lib-functions: introduce the 'test_set_port' helper functionSZEDER Gábor, Dec 9, 2018
  43. 7/7 test-lib: add the '--stress' option to run a test repeatedly under loadSZEDER Gábor, Dec 9, 2018
  44. fixup! test-lib: add the '--stress' option to run a test repeatedly under loadSZEDER Gábor, Dec 10, 2018
  45. Jeff KingDec 11, 2018
  46. 0/8 test-lib: add the '--stress' option to help reproduce occasional failures in flaky testsSZEDER Gábor, Dec 30, 2018
  47. 1/8 test-lib: translate SIGTERM and SIGHUP to an exitSZEDER Gábor, Dec 30, 2018
  48. 2/8 test-lib: parse options in a for loop to keep $@ intactSZEDER Gábor, Dec 30, 2018
  49. 3/8 test-lib: parse command line options earlierSZEDER Gábor, Dec 30, 2018
  50. 6/8 test-lib: extract Bash version check for '-x' tracingSZEDER Gábor, Dec 30, 2018
  51. Carlo ArenasDec 31, 2018
  52. 7/8 test-lib-functions: introduce the 'test_set_port' helper functionSZEDER Gábor, Dec 30, 2018
  53. 5/8 test-lib: set $TRASH_DIRECTORY earlierSZEDER Gábor, Dec 30, 2018
  54. SZEDER GáborDec 30, 2018
  55. 5/8 test-lib: set $TRASH_DIRECTORY earlierSZEDER Gábor, Dec 30, 2018
  56. 4/8 test-lib: consolidate naming of test-results pathsSZEDER Gábor, Dec 30, 2018
  57. 8/8 test-lib: add the '--stress' option to run a test repeatedly under loadSZEDER Gábor, Dec 30, 2018
  58. 0/8 test-lib: add the '--stress' option to help reproduce occasional failures in flaky testsSZEDER Gábor, Jan 5, 2019
  59. 1/8 test-lib: translate SIGTERM and SIGHUP to an exitSZEDER Gábor, Jan 5, 2019
  60. 2/8 test-lib: extract Bash version check for '-x' tracingSZEDER Gábor, Jan 5, 2019
  61. 3/8 test-lib: parse options in a for loop to keep $@ intactSZEDER Gábor, Jan 5, 2019
  62. 4/8 test-lib: parse command line options earlierSZEDER Gábor, Jan 5, 2019
  63. 5/8 test-lib: consolidate naming of test-results pathsSZEDER Gábor, Jan 5, 2019
  64. 6/8 test-lib: set $TRASH_DIRECTORY earlierSZEDER Gábor, Jan 5, 2019
  65. 8/8 test-lib: add the '--stress' option to run a test repeatedly under loadSZEDER Gábor, Jan 5, 2019
  66. 7/8 test-lib-functions: introduce the 'test_set_port' helper functionSZEDER Gábor, Jan 5, 2019
  67. Jeff KingJan 7, 2019

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