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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
test_begin() {
# Count tests to allow the test harness to double-check if all were
# included correctly.
ctr=0
[ -z "$RTLA" ] && RTLA="./rtla"
[ -n "$TEST_COUNT" ] && echo "1..$TEST_COUNT"
}
reset_osnoise() {
# Reset osnoise options to default and remove any dangling instances created
# by improperly exited rtla runs.
pushd /sys/kernel/tracing || return 1
# Remove dangling instances created by previous rtla run
echo 0 > tracing_thresh
cd instances
for i in osnoise_top osnoise_hist timerlat_top timerlat_hist
do
[ ! -d "$i" ] && continue
rmdir "$i"
done
# Reset options to default
# Note: those are copied from the default values of osnoise_data
# in kernel/trace/trace_osnoise.c
cd ../osnoise
echo all > cpus
echo DEFAULTS > options
echo 1000000 > period_us
echo 0 > print_stack
echo 1000000 > runtime_us
echo 0 > stop_tracing_total_us
echo 0 > stop_tracing_us
echo 1000 > timerlat_period_us
popd
}
check() {
# Simple check: run rtla with given arguments and test exit code.
# If TEST_COUNT is set, run the test. Otherwise, just count.
ctr=$(($ctr + 1))
if [ -n "$TEST_COUNT" ]
then
# Reset osnoise options before running test.
[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
# Run rtla; in case of failure, include its output as comment
# in the test results.
result=$(stdbuf -oL $TIMEOUT "$RTLA" $2 2>&1); exitcode=$?
if [ $exitcode -eq 0 ]
then
echo "ok $ctr - $1"
else
echo "not ok $ctr - $1"
# Add rtla output and exit code as comments in case of failure
echo "$result" | col -b | while read line; do echo "# $line"; done
printf "#\n# exit code %s\n" $exitcode
fi
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 $1"
}
unset_timeout() {
unset TIMEOUT
}
set_no_reset_osnoise() {
NO_RESET_OSNOISE=1
}
unset_no_reset_osnoise() {
unset NO_RESET_OSNOISE
}
test_end() {
# If running without TEST_COUNT, tests are not actually run, just
# counted. In that case, re-run the test with the correct count.
[ -z "$TEST_COUNT" ] && TEST_COUNT=$ctr exec bash $0 || true
}
# Avoid any environmental discrepancies
export LC_ALL=C
unset_timeout
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