Make bench.out in json format

This patch changes the output format of the main benchmark output file
(bench.out) to an extensible format.  I chose JSON over XML because in
addition to being extensible, it is also not too verbose.
Additionally it has good support in python.

The significant change I have made in terms of functionality is to put
timing information as an attribute in JSON instead of a string and to
do that, there is a separate program that prints out a JSON snippet
mentioning the type of timing (hp_timing or clock_gettime).  The mean
timing has now changed from iterations per unit to actual timing per
iteration.

1 files changed, 12 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 9aeb53ce91..072747b387 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,17 @@
 2014-03-29  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
+	* benchtests/Makefile (timing-type): New binary.
+	(bench-clean): Also remove bench-timing-type.
+	(bench): New target for timing-type.
+	(bench-func): Print output in JSON format.
+	* benchtests/bench-skeleton.c (main): Print output in JSON
+	format.
+	* benchtests/bench-timing-type.c: New file.
+	* benchtests/bench-timing.h (TIMING_TYPE): New macro.
+	(TIMING_PRINT_STATS): Remove.
+	* benchtests/scripts/bench.py (_print_arg_data): Store variant
+	name separately.
+
 	* benchtests/bench-modf.c: Remove.
 	* benchtests/modf-inputs: New inputs file.