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We can't default to doing parallel tests as there are tests that compete for the same resources and thus clash, for instance tests that put in place 'perf probe' probes, that clean the probes without regard to other tests needs, ARM64 coresight tests, Intel PT ones, etc. So reintroduce --p/--parallel and make -S/--sequential the default. We need to come up with infrastructure that state which tests can't run in parallel because they need exclusive access to some resource, something as simple as "probes" that would then avoid 'perf probe' tests from running while other such test is running, or make the tests more resilient, till then we can't use parallel mode as default. While at it, document all these options in the 'perf test' man page. Reported-by: Adrian Hunter <adrian.hunter@intel.com> Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com> Reported-by: James Clark <james.clark@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/lkml/Ziwm18BqIn_vc1vn@x1 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
51 lines
1.2 KiB
Plaintext
51 lines
1.2 KiB
Plaintext
perf-test(1)
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============
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NAME
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----
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perf-test - Runs sanity tests.
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SYNOPSIS
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--------
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[verse]
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'perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]'
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DESCRIPTION
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-----------
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This command does assorted sanity tests, initially through linked routines but
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also will look for a directory with more tests in the form of scripts.
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To get a list of available tests use 'perf test list', specifying a test name
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fragment will show all tests that have it.
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To run just specific tests, inform test name fragments or the numbers obtained
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from 'perf test list'.
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OPTIONS
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-------
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-s::
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--skip::
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Tests to skip (comma separated numeric list).
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-v::
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--verbose::
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Be more verbose.
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-S::
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--sequential::
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Run tests one after the other, this is the default mode.
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-p::
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--parallel::
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Run tests in parallel, speeds up the whole process but is not safe with
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the current infrastructure, where some tests that compete for some resources,
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for instance, 'perf probe' tests that add/remove probes or clean all probes, etc.
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-F::
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--dont-fork::
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Do not fork child for each test, run all tests within single process, this
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sets sequential mode.
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--dso::
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Specify a DSO for the "Symbols" test.
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