[kvm-unit-tests PATCH v1 0/2] s390x: Add exit time test

Nico Boehr
2022-08-30T11:56:41Z

Sometimes, it is useful to measure the exit time of certain instructions
to e.g. identify performance regressions in instructions emulated by the
hypervisor.

This series adds a test which executes some instructions and measures
their execution time. Since their execution time depends a lot on the
environment at hand, all tests are reported as PASS currently.

The point of this series is not so much the instructions which have been
chosen here (but your ideas are welcome), but rather the general
question whether it makes sense to have a test like this in
kvm-unit-tests.

Nico Boehr (2):
lib/s390x: time: add wrapper for stckf
s390x: add exittime tests

lib/s390x/asm/time.h | 9 ++
s390x/Makefile | 1 +
s390x/exittime.c | 258 +++++++++++++++++++++++++++++++++++++++++++
s390x/unittests.cfg | 4 +
4 files changed, 272 insertions(+)
create mode 100644 s390x/exittime.c

--
2.36.1