tree b8a2a124bbadc8aabf37456227f2f745b02b56e3
parent fea50042b6a4471b8ab8967e56ca6b946fb04fb8
author Richard Palethorpe <rpalethorpe@suse.com> 1506680591 +0200
committer Cyril Hrubis <chrubis@suse.cz> 1507720835 +0200

fzsync: Add long running thread support and deviation stats

Introduce a new synchronisation method which causes two threads to stop and
wait for each other. Continuing only when both threads have signaled their
readiness. Previously we would start a new thread in each iteration which
creates a variable delay in either the parent or child.

Using two long running threads significantly reduces the time needed to
perform a single race and may also increase timing stability on some
architectures.

This does not replace the delay method of synchronisation which can be used in
addition to the new method. Also the precision of the averages has been
reduced because double precision appears to be unnecessary.

Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>