P68: Continuous Clock Synchronization for Accurate
Performance Measurements
SessionPoster Reception
Authors
Event Type
ACM Student Research Competition
Poster
Reception
TimeTuesday, November 14th5:15pm -
7pm
LocationFour Seasons Ballroom
DescriptionClock synchronization is a key prerequisite for
accurate performance analysis. This is particularly true
for most HPC systems, due to the lack of a system-wide
timer. The effects of different clock properties lead to
false measurements and wrong conclusions. Often these
errors remain undetected by the user. Different
environmental effects cause continuous changes to clock
properties over time. This behavior is ignored by the
usual post-mortem approach for clock synchronization. In
order to improve time measurement accuracy we
implemented a method for continuous clock
synchronization. In this work, we share our experiences
and draw conclusions for tool development.
