tree 63583e9c7f3ea47be4969b3e4edc1887002efe18
parent 4eecbc95fbed040598222bc5c47098d238f0e97d
author Yabin Cui <yabinc@google.com> 1635978202 -0700
committer Yabin Cui <yabinc@google.com> 1635978675 -0700

simpleperf: test kernel version in some feature tests.

Some features are only based on kernel support. So we can skip
the feature tests if we are on a high enough kernel version.
Also cache kernel version to speed up tests.

Bug: none
Test: run simpleperf_unit_test
Change-Id: Id163effba77b29f0fa57cb0feb4e8ea87884af0d