run-schedulers

#!/bin/bash
#
# Run sched-ext scheduler for TIMEOUT seconds inside virtme-ng and catch
# potential errors, then unload the scheduler and return the exit status.

# Maximum time for each scheduler run.
TEST_TIMEOUT=30

# Maximum timeout for the guest used for each scheduler run (this is used to
# hard-shutdown the guest in case of system hangs).
GUEST_TIMEOUT=60

# Check if virtme-ng is available.
if [ ! -x `which vng` ]; then
    echo "vng not found, please install virtme-ng to enable testing"
    exit 1
fi

function runtest() {
    local bin="${1}"

    if [ -z "${bin}" ]; then
        echo "No binary passed to runtest"
        exit 1
    fi

    if ! [ -f "${bin}" ]; then
        echo "Binary ${bin} was not a regular file"
        exit 1
    fi

    rm -f /tmp/output
    (timeout --foreground --preserve-status ${GUEST_TIMEOUT} \
        vng --force-9p --verbose -- \
            "timeout --foreground --preserve-status ${TEST_TIMEOUT} ${bin}" \
                2>&1 </dev/null || true) | tee /tmp/output
}

# Test all the available schedulers.
#
# NOTE: virtme-ng automatically runs the kernel from the current working
# directory by default.
#
# Each scheduler will be tested in a separate instance booted from scratch, to
# ensure that each run does not impact the others.
#
for sched in $(find tools/sched_ext/build/bin -type f -executable); do
    runtest "${sched}"
    grep -v " Speculative Return Stack Overflow" /tmp/output | \
        sed -n -e '/\bBUG:/q1' \
            -e '/\bWARNING:/q1' \
            -e '/\berror\b/Iq1' \
            -e '/\bstall/Iq1' \
            -e '/\btimeout\b/Iq1'
    res=$?
    if [ ${res} -ne 0 ]; then
        echo "FAIL: ${sched}"
        exit 1
    else
        echo "OK: ${sched}"
    fi
done

# Run the selftests suite
runtest "tools/testing/selftests/sched_ext/runner"
sed -n -e '/not ok/q1' /tmp/output
res=$?
if [ ${res} -ne 0 ]; then
	echo "FAIL: selftests"
	echo "output: $(cat /tmp/output)"
else
	echo "OK: selftests"
fi