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rtla/tests: Add runtime tests for -C/--cgroup

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Add a new script check-cgroup-match.sh that retrieves the cgroup of the
main rtla process and compares it to the cgroup of the rtla workload
threads.

Add a new test based on this script, for both osnoise and timerlat
tools, testing the variant of -C without argument (which sets the cgroup
of the workload to the cgroup of the rtla main process).

Note that this has to be tested in kernel mode to be significant for
timerlat tool, as user workloads inherit the parent rtla process cgroup
even without the option.

Reviewed-by: Wander Lairson Costa <wander@redhat.com>
Link: https://lore.kernel.org/r/20260423130558.882022-10-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
This commit is contained in:
Tomas Glozar 2026-04-23 15:05:58 +02:00
parent a98dad63cd
commit 117a366c5b
3 changed files with 23 additions and 0 deletions
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3
tools/tracing/rtla/tests/osnoise.t
View File

@ -18,6 +18,9 @@ check_top_q_hist "verify the --trace param" \
check_top_q_hist "verify the --priority/-P param" \
"osnoise TOOL -P F:1 -c 0 -r 900000 -d 10s -S 1 --on-threshold shell,command=\"tests/scripts/check-priority.sh SCHED_FIFO 1\"" \
2 "Priorities are set correctly"
check_top_q_hist "verify the -C/--cgroup param" \
"osnoise TOOL -C -c 0 -r 900000 -d 10s -S 1 --on-threshold shell,command=\"tests/scripts/check-cgroup-match.sh\"" \
2 "cgroup matches for all workload PIDs"
check_top_q_hist "verify the -c/--cpus param" \
"osnoise TOOL -P F:1 -c 0 -r 900000 -d 10s -S 1 --on-threshold shell,command=tests/scripts/check-cpus.sh" 2 "^Affinity of threads: 0$"
check_top_q_hist "verify the -H/--house-keeping param" \

17
tools/tracing/rtla/tests/scripts/check-cgroup-match.sh Executable file
View File

@ -0,0 +1,17 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
. "$(dirname $0)/lib/get_workload_pids.sh"
rtla_pid=$(echo $(ps -o ppid= $$))
rtla_cgroup=$(</proc/$rtla_pid/cgroup)
echo "RTLA cgroup: $rtla_cgroup"
for pid in $(get_workload_pids)
do
pid_cgroup=$(</proc/$pid/cgroup)
echo "PID $pid cgroup: $pid_cgroup"
if ! [ "$pid_cgroup" = "$rtla_cgroup" ]
then
echo "Mismatch!"
exit 0
fi
done
echo "cgroup matches for all workload PIDs"

3
tools/tracing/rtla/tests/timerlat.t
View File

@ -43,6 +43,9 @@ check_top_hist "disable auto-analysis" \
check_top_hist "verify -P/--priority" \
"timerlat TOOL -P F:1 -c 0 -d 10s -T 1 --on-threshold shell,command=\"tests/scripts/check-priority.sh SCHED_FIFO 1\"" \
2 "Priorities are set correctly"
check_top_hist "verify -C/--cgroup" \
"timerlat TOOL -k -C -c 0 -d 10s -T 1 --on-threshold shell,command=\"tests/scripts/check-cgroup-match.sh\"" \
2 "cgroup matches for all workload PIDs"
check_top_q_hist "verify -c/--cpus" \
"timerlat TOOL -c 0 -d 10s -T 1 --on-threshold shell,command=tests/scripts/check-cpus.sh" 2 "^Affinity of threads: 0$"
check_top_q_hist "verify -H/--house-keeping" \