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When a timing sensitive test run on a heavily loaded system, sometimes a task runs for longer than it usually does and causes the test to fail. All the timing requirements in the unit tests are trying to verify the various delays in our codebase, and mostly we don't care about the time taken by active running code (as they are very quick.) To improve the stability of tests, let's slow down the time. To a test, it's as if the code runs faster. If a test uses udelay() and exceeds the 10-second time limit, we can make that single test faster by setting the time scale. BUG=None TEST=Repeatedly run 'make runtests' BRANCH=None Change-Id: I9bc5c77e0d34d04c8630d495387a751ef29c7bd5 Signed-off-by: Vic Yang <victoryang@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/220717 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit