---------- Forwarded message ---------- From: "Xuehan Xu" <xxhdx1985...@gmail.com> Date: Apr 29, 2015 10:11 AM Subject: How to get real time in a xen vm? To: <xs-de...@lists.xenserver.org> Cc:
Hi, everyone Recently, I got a need to measure the latency of the I/O operation of TAPDISK on dom0, in comparison with that latency on a phyisical machine. I tried to measure the latency by calling "gettimeofday" right before and after the io operation and compute the difference. But the time acquired by gettimeofday is a virtual time of the dom0, which makes it meaningless to compare to the latency on a physical machine. How can I get the real and highly accurate time in dom0? Thanks:)
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