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rtla/tests: Test setting default options

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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 <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20250320092500.101385-7-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Tomas Glozar 2025-03-20 10:25:00 +01:00 committed by Steven Rostedt (Google)
parent 6c6182728a
commit a86150f310
2 changed files with 32 additions and 0 deletions
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26
tools/tracing/rtla/tests/engine.sh
View File

@ -61,6 +61,32 @@ check() {
fi
}
check_with_osnoise_options() {
# Do the same as "check", but with pre-set osnoise options.
# Note: rtla should reset the osnoise options, this is used to test
# if it indeed does so.
# Save original arguments
arg1=$1
arg2=$2
# Apply osnoise options (if not dry run)
if [ -n "$TEST_COUNT" ]
then
[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
shift
while shift
do
[ "$1" == "" ] && continue
option=$(echo $1 | cut -d '=' -f 1)
value=$(echo $1 | cut -d '=' -f 2)
echo "option: $option, value: $value"
echo "$value" > "/sys/kernel/tracing/osnoise/$option" || return 1
done
fi
NO_RESET_OSNOISE=1 check "$arg1" "$arg2"
}
set_timeout() {
TIMEOUT="timeout -v -k 15s $1"
}

6
tools/tracing/rtla/tests/osnoise.t
View File

@ -16,4 +16,10 @@ check "verify the --trace param" \
check "verify the --entries/-E param" \
"osnoise hist -P F:1 -c 0 -r 900000 -d 1M -b 10 -E 25"
# Test setting default period by putting an absurdly high period
# and stopping on threshold.
# If default period is not set, this will time out.
check_with_osnoise_options "apply default period" \
"osnoise hist -s 1" period_us=600000000
test_end