kernel/linux.git/tools/tracing/rtla/tests/engine.sh, branch v6.18.21

tools/rtla: Add test engine support for unexpected output

2025-09-27T08:53:21+00:00

Add a check() parameter to indicate which text must not appear in the output. Simplify the code so that we can print failures as they happen rather than trying to figure out what went wrong after printing "not ok". This also means that "not ok" gets printed after the info rather than before, which seems more intuitive anyway. Cc: John Kacur Cc: Costa Shulyupin Link: https://lore.kernel.org/20250907022325.243930-7-crwood@redhat.com Reviewed-by: Tomas Glozar Signed-off-by: Crystal Wood Signed-off-by: Steven Rostedt (Google)

rtla/tests: Test timerlat -P option using actions

2025-07-28T14:22:39+00:00

The -P option is used to set priority of osnoise and timerlat threads. Extend the test for -P with --on-threshold calling a script that looks for running timerlat threads and checks if their priority is set correctly. As --on-threshold is only supported by timerlat at the moment, this is only implemented there so far. Cc: John Kacur Cc: Luis Goncalves Cc: Chang Yin Cc: Costa Shulyupin Link: https://lore.kernel.org/20250725133817.59237-3-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)

rtla/tests: Check rtla output with grep

2025-07-25T20:43:57+00:00

Add argument to the check command in the test suite that takes a regular expression that the output of rtla command is checked against. This allows testing for specific information in rtla output in addition to checking the return value. Two minor improvements are included: running rtla with "eval" so that arguments with spaces can be passed to it via shell quotations, and the stdout of pushd and popd is suppressed to clean up the test output. Cc: John Kacur Cc: Luis Goncalves Cc: Arnaldo Carvalho de Melo Cc: Chang Yin Cc: Costa Shulyupin Cc: Crystal Wood Cc: Gabriele Monaco Link: https://lore.kernel.org/20250626123405.1496931-7-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)

rtla: Set distinctive exit value for failed tests

2025-05-07T19:36:19+00:00

A test is considered failed when a sample trace exceeds the threshold. Failed tests return the same exit code as passed tests, requiring test frameworks to determine the result by searching for "hit stop tracing" in the output. Assign a distinct exit code for failed tests to enable the use of shell expressions and seamless integration with testing frameworks without the need to parse output. Add enum type for return value. Update `make check`. Cc: Daniel Bristot de Oliveira Cc: John Kacur Cc: "Luis Claudio R. Goncalves" Cc: Eder Zulian Cc: Dan Carpenter Cc: Jan Stancek Link: https://lore.kernel.org/20250417185757.2194541-1-costa.shul@redhat.com Signed-off-by: Costa Shulyupin Reviewed-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)

rtla/tests: Test setting default options

2025-03-26T14:36:39+00:00

Add function to test engine to test with pre-set osnoise options, and use it to test whether osnoise period (as an example) is set correctly. The test works by pre-setting a high period of 10 minutes and stop on threshold. Thus, it is easy to check whether rtla is properly resetting the period to default: if it is, the test will complete on time, since the first sample will overflow the threshold. If not, it will time out. Cc: Luis Goncalves Link: https://lore.kernel.org/20250320092500.101385-7-tglozar@redhat.com Signed-off-by: Tomas Glozar Reviewed-by: John Kacur Signed-off-by: Steven Rostedt (Google)

rtla/tests: Reset osnoise options before check

2025-03-26T14:36:39+00:00

Remove any dangling tracing instances from previous improperly exited runs of rtla, and reset osnoise options to default before running a test case. This ensures that the test results are deterministic. Specific test cases checked that rtla behaves correctly even when the tracer state is not clean will be added later. Cc: John Kacur Cc: Luis Goncalves Link: https://lore.kernel.org/20250320092500.101385-6-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)

tools/rtla: Add basic test suite

2025-01-23T17:21:45+00:00

Implement a simple TAP-based test engine in bash and a few basic tests using it, to be used to check for bugs and regressions. A new "check" target is added to the rtla Makefile that runs the test suite using the "prove" command implemented by Test::Harness. The only test format currently supported is running rtla with defined command arguments per test, checking its exit code. In case the exit code is non-zero, the output of rtla is displayed, together with the exit code. The test cases are adopted from rtla tests in the Continuous Kernel Integration (CKI) project [1] with the authors' approval. [1] https://gitlab.com/redhat/centos-stream/tests/kernel/kernel-tests/-/blob/main/rt-tests/us/rtla/ Cc: John Kacur Cc: Luis Goncalves Cc: Chang Yin Cc: Qiao Zhao Link: https://lore.kernel.org/20250120135630.802111-1-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google)