selftests/timens: Add a simple perf test for clock_gettime()
Output on success:
1..4
ok 1 host: clock: monotonic cycles:
148323947
ok 2 host: clock: boottime cycles:
148577503
ok 3 ns: clock: monotonic cycles:
137659217
ok 4 ns: clock: boottime cycles:
137959154
# Pass 4 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0
Output with lack of permissions:
1..4
ok 1 host: clock: monotonic cycles:
145671139
ok 2 host: clock: boottime cycles:
146958357
not ok 3 # SKIP need to run as root
Output without support of time namespaces:
1..4
ok 1 host: clock: monotonic cycles:
145671139
ok 2 host: clock: boottime cycles:
146958357
not ok 3 # SKIP Time namespaces are not supported
Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-34-dima@arista.com