tree d50b43955067fad087627caa605d539928d7f52e
parent c13a60ce72aaf5b07b93977ab86e7522d167ec28
author Jens Axboe <axboe@kernel.dk> 1508263904 -0600
committer Jens Axboe <axboe@kernel.dk> 1508263904 -0600

gettime: improve cpu clock test

We're missing a synchronization before reading and comparing
with the current *t->seq in the loop. Rewrite the loop to
use compare-and-exchange for the increment, and ensure that
we have the proper synchronization inserted. This should both
be faster and more reliable.

Signed-off-by: Jens Axboe <axboe@kernel.dk>