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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# futex-contention python test
set -e
shelldir=$(dirname "$0")
# shellcheck source=lib/setup_python.sh
. "${shelldir}"/lib/setup_python.sh
# If we don't have the perf python module, we can't test
if ! "$PYTHON" -c 'import perf' > /dev/null 2>&1; then
echo "Skipping test, perf python module not found"
exit 2
fi
script_dir="$(dirname "$0")/../../python"
script_path="${script_dir}/futex-contention.py"
if ! perf check feature -q libtraceevent > /dev/null 2>&1; then
echo "Skipping test, libtraceevent is disabled"
exit 2
fi
if [ ! -f "$script_path" ]; then
echo "Skipping test, futex-contention.py not found at $script_path"
exit 2
fi
err=0
temp_data=""
temp_out=""
cleanup() {
rm -f "${temp_data}" "${temp_out}"
}
trap 'cleanup' EXIT TERM INT
temp_data=$(mktemp /tmp/perf.data.XXXXXX)
temp_out=$(mktemp /tmp/perf.out.XXXXXX)
test_synthetic() {
echo "Testing futex-contention.py synthetic events..."
if ! "$PYTHON" - "$script_path" << 'EOF'
import importlib.util
import sys
from types import SimpleNamespace
spec = importlib.util.spec_from_file_location("futex_contention", sys.argv[1])
mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(mod)
enter_sample = SimpleNamespace(
evsel="evsel(syscalls:sys_enter_futex:k)",
sample_pid=1234,
sample_tid=1234,
uaddr=0xdeadbeef,
op=mod.FUTEX_WAIT | mod.FUTEX_PRIVATE_FLAG,
sample_time=1000,
)
exit_sample = SimpleNamespace(
evsel="evsel(syscalls:sys_exit_futex:k)",
sample_pid=1234,
sample_tid=1234,
sample_time=2500,
)
mod.process_event(enter_sample)
mod.process_event(exit_sample)
stats = mod.durations.get((1234, 0xdeadbeef))
assert stats is not None and stats.count == 1, f"Unexpected stats: {stats}"
assert stats.min_time == 1500 and stats.max_time == 1500 and stats.avg() == 1500.0
line = (f"{mod.process_names.get(1234, 'unknown')}[1234] lock {0xdeadbeef:x} "
f"contended {stats.count} times, {stats.avg():.0f} avg ns "
f"[max: {stats.max_time} ns, min {stats.min_time} ns]")
expected = "unknown[1234] lock deadbeef contended 1 times, 1500 avg ns [max: 1500 ns, min 1500 ns]"
assert line == expected, line
EOF
then
echo "Synthetic test failed."
err=1
else
echo "Synthetic test passed."
fi
}
test_file_mode() {
echo "Testing futex-contention.py..."
# Some systems might not have syscalls:sys_enter_futex
if ! perf list tracepoint | grep -q syscalls:sys_enter_futex; then
echo "Skipping file mode test, syscalls:sys_enter_futex not found"
return
fi
# Generate some futex events
if ! perf record -B -N --no-bpf-event \
-e syscalls:sys_enter_futex,syscalls:sys_exit_futex -a -o "${temp_data}" \
-- sleep 0.1 2>/dev/null; then
echo "Skipping file mode test (record failed)"
return
fi
if ! perf script futex-contention -i "${temp_data}" > "${temp_out}"; then
echo "File mode test failed."
err=1
else
echo "File mode test passed."
fi
}
test_synthetic
test_file_mode
exit $err
|
