On Wed, 13 Nov 2024 07:10:55 -0800 Breno Leitao wrote: > + if ! grep -q "cpu=[0-9]\+" "${TMPFILENAME}"; then > + echo "FAIL: 'cpu=' not found in ${TMPFILENAME}" >&2 > + cat "${TMPFILENAME}" >&2 > + exit "${ksft_fail}" > + fi Could we try to do something like pick a 'random' CPU ID from sysfs, taskset the write / echo, and match that the incoming message has the expected CPU ID, not just any?