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Currently, kselftest use TEST_PROGS, TEST_PROGS_EXTENDED, TEST_FILES to indicate the test program, extended test program and test files. It is easy to understand the purpose of these files. But mix of compiled and uncompiled files lead to duplicated "all" and "clean" targets. In order to remove the duplicated targets, introduce TEST_GEN_PROGS, TEST_GEN_PROGS_EXTENDED, TEST_GEN_FILES to indicate the compiled objects. Also, the later patch will make use of TEST_GEN_XXX to redirect these files to output directory indicated by KBUILD_OUTPUT or O. And add this changes to "Contributing new tests(details)" of Documentation/kselftest.txt. Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
110 lines
3.2 KiB
Plaintext
110 lines
3.2 KiB
Plaintext
Linux Kernel Selftests
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The kernel contains a set of "self tests" under the tools/testing/selftests/
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directory. These are intended to be small tests to exercise individual code
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paths in the kernel. Tests are intended to be run after building, installing
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and booting a kernel.
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On some systems, hot-plug tests could hang forever waiting for cpu and
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memory to be ready to be offlined. A special hot-plug target is created
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to run full range of hot-plug tests. In default mode, hot-plug tests run
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in safe mode with a limited scope. In limited mode, cpu-hotplug test is
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run on a single cpu as opposed to all hotplug capable cpus, and memory
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hotplug test is run on 2% of hotplug capable memory instead of 10%.
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Running the selftests (hotplug tests are run in limited mode)
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=============================================================
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To build the tests:
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$ make -C tools/testing/selftests
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To run the tests:
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$ make -C tools/testing/selftests run_tests
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To build and run the tests with a single command, use:
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$ make kselftest
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- note that some tests will require root privileges.
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Running a subset of selftests
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========================================
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You can use the "TARGETS" variable on the make command line to specify
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single test to run, or a list of tests to run.
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To run only tests targeted for a single subsystem:
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$ make -C tools/testing/selftests TARGETS=ptrace run_tests
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You can specify multiple tests to build and run:
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$ make TARGETS="size timers" kselftest
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See the top-level tools/testing/selftests/Makefile for the list of all
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possible targets.
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Running the full range hotplug selftests
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========================================
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To build the hotplug tests:
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$ make -C tools/testing/selftests hotplug
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To run the hotplug tests:
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$ make -C tools/testing/selftests run_hotplug
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- note that some tests will require root privileges.
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Install selftests
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=================
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You can use kselftest_install.sh tool installs selftests in default
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location which is tools/testing/selftests/kselftest or an user specified
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location.
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To install selftests in default location:
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$ cd tools/testing/selftests
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$ ./kselftest_install.sh
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To install selftests in an user specified location:
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$ cd tools/testing/selftests
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$ ./kselftest_install.sh install_dir
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Running installed selftests
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===========================
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Kselftest install as well as the Kselftest tarball provide a script
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named "run_kselftest.sh" to run the tests.
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You can simply do the following to run the installed Kselftests. Please
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note some tests will require root privileges.
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cd kselftest
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./run_kselftest.sh
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Contributing new tests
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======================
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In general, the rules for selftests are
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* Do as much as you can if you're not root;
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* Don't take too long;
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* Don't break the build on any architecture, and
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* Don't cause the top-level "make run_tests" to fail if your feature is
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unconfigured.
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Contributing new tests(details)
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===============================
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* Use TEST_GEN_XXX if such binaries or files are generated during
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compiling.
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TEST_PROGS, TEST_GEN_PROGS mean it is the excutable tested by
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default.
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TEST_PROGS_EXTENDED, TEST_GEN_PROGS_EXTENDED mean it is the
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executable which is not tested by default.
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TEST_FILES, TEST_GEN_FILES mean it is the file which is used by
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test.
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