3 The kernel contains a set of "self tests" under the tools/testing/selftests/
4 directory. These are intended to be small tests to exercise individual code
5 paths in the kernel. Tests are intended to be run after building, installing
8 On some systems, hot-plug tests could hang forever waiting for cpu and
9 memory to be ready to be offlined. A special hot-plug target is created
10 to run full range of hot-plug tests. In default mode, hot-plug tests run
11 in safe mode with a limited scope. In limited mode, cpu-hotplug test is
12 run on a single cpu as opposed to all hotplug capable cpus, and memory
13 hotplug test is run on 2% of hotplug capable memory instead of 10%.
15 Running the selftests (hotplug tests are run in limited mode)
16 =============================================================
19 $ make -C tools/testing/selftests
23 $ make -C tools/testing/selftests run_tests
25 To build and run the tests with a single command, use:
28 - note that some tests will require root privileges.
31 Running a subset of selftests
32 ========================================
33 You can use the "TARGETS" variable on the make command line to specify
34 single test to run, or a list of tests to run.
36 To run only tests targeted for a single subsystem:
37 $ make -C tools/testing/selftests TARGETS=ptrace run_tests
39 You can specify multiple tests to build and run:
40 $ make TARGETS="size timers" kselftest
42 See the top-level tools/testing/selftests/Makefile for the list of all
46 Running the full range hotplug selftests
47 ========================================
49 To build the hotplug tests:
50 $ make -C tools/testing/selftests hotplug
52 To run the hotplug tests:
53 $ make -C tools/testing/selftests run_hotplug
55 - note that some tests will require root privileges.
61 You can use kselftest_install.sh tool installs selftests in default
62 location which is tools/testing/selftests/kselftest or a user specified
65 To install selftests in default location:
66 $ cd tools/testing/selftests
67 $ ./kselftest_install.sh
69 To install selftests in a user specified location:
70 $ cd tools/testing/selftests
71 $ ./kselftest_install.sh install_dir
73 Running installed selftests
74 ===========================
76 Kselftest install as well as the Kselftest tarball provide a script
77 named "run_kselftest.sh" to run the tests.
79 You can simply do the following to run the installed Kselftests. Please
80 note some tests will require root privileges.
85 Contributing new tests
86 ======================
88 In general, the rules for selftests are
90 * Do as much as you can if you're not root;
92 * Don't take too long;
94 * Don't break the build on any architecture, and
96 * Don't cause the top-level "make run_tests" to fail if your feature is
99 Contributing new tests(details)
100 ===============================
102 * Use TEST_GEN_XXX if such binaries or files are generated during
104 TEST_PROGS, TEST_GEN_PROGS mean it is the excutable tested by
106 TEST_PROGS_EXTENDED, TEST_GEN_PROGS_EXTENDED mean it is the
107 executable which is not tested by default.
108 TEST_FILES, TEST_GEN_FILES mean it is the file which is used by