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Diffstat (limited to 'test/README.md')
| -rw-r--r-- | test/README.md | 19 |
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diff --git a/test/README.md b/test/README.md index 4db26bd047..5c80d64762 100644 --- a/test/README.md +++ b/test/README.md @@ -128,3 +128,22 @@ To stochastically verify that the algorithm that produces uniformly distributed random numbers is operating correctly (with a false positive rate of 0.01%): $ ./util/wrap.sh test/bntest -stochastic + +Running Tests in Parallel +------------------------- + +By default the test harness will execute the selected tests sequentially. +Depending on the platform characteristics, running more than one test job in +parallel may speed up test execution. +This can be requested by setting the `HARNESS_JOBS` environment variable to a +positive integer value. This specifies the maximum number of test jobs to run in +parallel. + +Depending on the Perl version different strategies could be adopted to select +which test recipes can be run in parallel. In recent versions of Perl, unless +specified otherwise, any task can be run in parallel. Consult the documentation +for `TAP::Harness` to know more. + +To run up to four tests in parallel at any given time: + + $ make HARNESS_JOBS=4 test |