#!/bin/bash
#
# Run a 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

# List of schedulers to test
#
# TODO:
#   - scx_layered: temporarily excluded because it
#     cannot run with a default configuration
#   - scx_flatcg, scx_pair: excluded until cgroup support lands upstream
#   - scx_mitosis: not ready yet
#
SCHEDULERS="scx_simple scx_central scx_nest scx_rusty scx_rustland scx_bpfland"

if [ ! -x `which vng` ]; then
    echo "vng not found, please install virtme-ng to enable testing"
    exit 1
fi
if [ $# -lt 1 ]; then
    echo "Usage: $0 VMLINUZ"
    exit 1
fi
kernel=$1

for sched in ${SCHEDULERS}; do
    sched_path=$(find -type f -executable -name ${sched})
    if [ ! -n "${sched_path}" ]; then
        echo "${sched}: binary not found"
        echo "FAIL: ${sched}"
        exit 1
    fi
    echo "testing ${sched_path}"

    rm -f /tmp/output
    timeout --preserve-status ${GUEST_TIMEOUT} \
        vng --force-9p -v -r ${kernel} -- \
            "timeout --foreground --preserve-status ${TEST_TIMEOUT} ${sched_path}" \
                2> >(tee /tmp/output) </dev/null
        grep -v " Speculative Return Stack Overflow" /tmp/output | \
            sed -n -e '/\bBUG:/q1' \
                   -e '/\bWARNING:/q1' \
                   -e '/\berror\b/Iq1' \
                   -e '/\bstall/Iq1' \
                   -e '/\btimeout\b/Iq1'
    res=$?
    if [ ${res} -ne 0 ]; then
        echo "FAIL: ${sched}"
        exit 1
    else
        echo "OK: ${sched}"
    fi
done