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c35eb77a67
Multiple runtime tests in RTLA rely on the get_workload_pids() shell
helper function to get the PIDs of both kernel and user workloads.
On some systems (e.g. Fedora 43), pgrep matches kernel thread names
including square brackets: "[osnoise/0]"; on other systems (e.g.
RHEL 9.8), brackets are not included: "osnoise/0".
Accept both as valid workload PIDs rather that just the non-bracket form
to make the tests work on all systems.
Fixes: a98dad63cd ("rtla/tests: Add runtime test for -k and -u options")
Reported-by: Crystal Wood <crwood@redhat.com>
Link: https://lore.kernel.org/r/20260604140547.3616495-1-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
RTLA: Real-Time Linux Analysis tools The rtla meta-tool includes a set of commands that aims to analyze the real-time properties of Linux. Instead of testing Linux as a black box, rtla leverages kernel tracing capabilities to provide precise information about the properties and root causes of unexpected results. Installing RTLA RTLA depends on the following libraries and tools: - libtracefs - libtraceevent - libcpupower (optional, for --deepest-idle-state) - libcheck (optional, for unit tests) For BPF sample collection support, the following extra dependencies are required: - libbpf 1.0.0 or later - bpftool with skeleton support - clang with BPF CO-RE support It also depends on python3-docutils to compile man pages. For development, we suggest the following steps for compiling rtla: $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git $ cd libtraceevent/ $ make $ sudo make install $ cd .. $ git clone git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git $ cd libtracefs/ $ make $ sudo make install $ cd .. $ cd $libcpupower_src $ make $ sudo make install $ cd $rtla_src $ make $ sudo make install Running tests RTLA has two test suites: a runtime test suite and a unit test suite. The runtime test suite is available as "make check" (root required) and has the following dependencies, in addition to RTLA build dependencies: - Perl - Test::Harness (libtest-harness-perl on Debian/Ubuntu, perl-Test-Harness on Fedora/RHEL) - bash - coreutils - ldd - util-linux - procps(-ng) - bpftool (if rtla is built against libbpf) as well as the following required system configuration: - CONFIG_OSNOISE_TRACER=y - CONFIG_TIMERLAT_TRACER=y - tracefs mounted and readable at /sys/kernel/tracing The unit test suite is available as "make unit-tests" and has the following dependencies: - libcheck Unlike the runtime test suite, root is not required to run unit tests, nor is a tracefs/osnoise/timerlat-capable kernel required. For further information, please refer to the rtla man page.