From e70dc43d6bfea81a565e3b420795bd351112458e Mon Sep 17 00:00:00 2001
From: Quincey Koziol <koziol@hdfgroup.org>
Date: Sat, 23 Sep 2017 21:47:07 -0500
Subject: Update H5_now_usec to prefer using clock_gettime.

---
 src/H5timer.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/H5timer.c b/src/H5timer.c
index 2cb8cea..4a1f3f0 100644
--- a/src/H5timer.c
+++ b/src/H5timer.c
@@ -193,7 +193,14 @@ H5_now_usec(void)
 {
     uint64_t	now;                    /* Current time, in microseconds */
 
-#ifdef H5_HAVE_GETTIMEOFDAY
+#if defined(H5_HAVE_CLOCK_GETTIME)
+    {
+        struct timespec ts;
+
+        HDclock_gettime(CLOCK_MONOTONIC, &ts);
+        now = (uint64_t)(ts.tv_sec * (1000 * 1000)) + (uint64_t)(ts.tv_nsec * 1000);
+    }
+#elif defined(H5_HAVE_GETTIMEOFDAY)
     {
         struct timeval now_tv;
 
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