On 02/08/16 03:25 AM, Erik de Castro Lopo wrote:
The configure stuff in the second seems overly complex. Is something like
this:
AC_CHECK_LIB(rt, clock_gettime, have_clock_gettime=yes)
if test x$have_clock_gettime = xyes; then
AC_DEFINE(HAVE_CLOCK_GETTIME)
fi
not sufficient? You can either test this and provide an updated patch or
I can fix it here.
Yes, much simpler and works fine.
Thanks
Dave
From 6fe1a1c2a254e212227a208d241c9328469176c4 Mon Sep 17 00:00:00 2001
From: Dave Yeo <dave.r.yeo@gmail.com>
Date: Tue, 2 Feb 2016 20:19:59 -0800
Subject: [PATCH] Use gettimeofday() for benchmarking
Some operating systems such as OS/2 don't have any of the CLOCK* API implemented
Signed-off-by: Dave Yeo <dave.r.yeo@gmail.com>
---
configure.ac | 5 +++++
microbench/util.c | 38 +++++++++++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 915869b..b577248 100644
--- a/configure.ac
+++ b/configure.ac
@@ -371,6 +371,11 @@ AC_DEFINE(FLAC__HAS_DOCBOOK_TO_MAN)
AH_TEMPLATE(FLAC__HAS_DOCBOOK_TO_MAN, [define if you have docbook-to-man or docbook2man])
fi
+AC_CHECK_LIB(rt, clock_gettime, have_clock_gettime=yes)
+if test x$have_clock_gettime = xyes; then
+ AC_DEFINE(HAVE_CLOCK_GETTIME)
+fi
+
# only matters for x86
AC_CHECK_PROGS(NASM, nasm)
AM_CONDITIONAL(FLaC__HAS_NASM, test -n "$NASM")
diff --git a/microbench/util.c b/microbench/util.c
index ff1c3fb..dbd4bc1 100644
--- a/microbench/util.c
+++ b/microbench/util.c
@@ -95,7 +95,7 @@ benchmark_function (void (*testfunc) (void), unsigned count)
return counter_diff (&start, &end) / count ;
} /* benchmark_function */
-#else
+#elif defined HAVE_CLOCK_GETTIME
#include <time.h>
#include <sys/time.h>
@@ -131,6 +131,42 @@ benchmark_function (void (*testfunc) (void), unsigned count)
return timespec_diff (&start, &end) / count ;
} /* benchmark_function */
+#else
+
+#include <time.h>
+#include <sys/time.h>
+
+static double
+timeval_diff (const struct timeval * start, const struct timeval * end)
+{ struct timeval diff;
+
+ if (end->tv_usec - start->tv_usec < 0)
+ { diff.tv_sec = end->tv_sec - start->tv_sec - 1 ;
+ diff.tv_usec = 1000000 + end->tv_usec - start->tv_usec ;
+ }
+ else
+ { diff.tv_sec = end->tv_sec - start->tv_sec ;
+ diff.tv_usec = end->tv_usec-start->tv_usec ;
+ } ;
+
+ return diff.tv_sec + 1e-6 * diff.tv_usec ;
+}
+
+double
+benchmark_function (void (*testfunc) (void), unsigned count)
+{ struct timeval start, end;
+ unsigned k ;
+
+ gettimeofday(&start, NULL);
+
+ for (k = 0 ; k < count ; k++)
+ testfunc () ;
+
+ gettimeofday(&end, NULL);
+
+ return timeval_diff (&start, &end) / count ;
+} /* benchmark_function */
+
#endif
static int
--
2.0.0
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