Revert "Use timerfd to improve the accuracy of query timing"

This reverts commit 3d51a99dc8a5b6c29df406ac58f7de18db6fa0b7.

Reason for revert: Does not close the timerfd object properly, which may cause a memory leak.

Change-Id: I25d7da13591696c9dfda60ee0fdd2574dbcdf337
5 files changed