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
