[perf] Add a simple report printer.

After a run, it can be useful to reprint the results, so add
cairo-perf-print to perform that task.

For the future, I'd like to move the performance suite over to the
git/perf style of single, multi-function binary.

The sequence of operations that I typically do are:

./cairo-perf-trace -r -v -i 6 > `git describe`.`hostname`.perf
./cairo-perf-diff-files REVA REVB
./cairo-perf-print REVA
./cairo-perf-compare-backends REVA

which misses the caching available with cairo-perf-diff. 'make html' is
almost what I want, but still too prescriptive. However, that does need to
be addressed for continuous performance monitoring.

Along the perf lines, those sequence of operations become:
  ./cairo-perf record -i 6
  ./cairo-perf report
  ./cairo-perf report REVA REVB
  ./cairo-perf report --backends="image,xlib,gl" REVA REVB
  ./cairo-perf report --html REVA REVB

Also we want to think about installing the cairo-perf binary. So we want
to differentiate when run inside a git checkout.

perf/Makefile.am

@@ -13,14 +13,15 @@ AM_LDFLAGS = $(CAIRO_LDFLAGS)
 EXTRA_PROGRAMS += cairo-perf \
 		  cairo-perf-trace \
 		  cairo-perf-diff-files \
+		  cairo-perf-print \
 		  cairo-perf-compare-backends \
 		  cairo-perf-graph-files
 EXTRA_DIST += cairo-perf-diff COPYING
 EXTRA_LTLIBRARIES += libcairoperf.la
 
-LDADD = $(top_builddir)/boilerplate/libcairoboilerplate.la \
+LDADD = libcairoperf.la \
+	$(top_builddir)/boilerplate/libcairoboilerplate.la \
 	$(top_builddir)/src/libcairo.la \
-	libcairoperf.la \
 	$(CAIROPERF_LIBS)
 
 cairo_perf_SOURCES =		\
@@ -99,6 +100,9 @@ cairo_perf_trace_DEPENDENCIES = \
 cairo_perf_diff_files_SOURCES =	\
 	cairo-perf-diff-files.c
 
+cairo_perf_print_SOURCES =	\
+	cairo-perf-print.c
+
 cairo_perf_compare_backends_SOURCES =	\
 	cairo-perf-compare-backends.c
 

perf/cairo-perf-print.c

@@ -0,0 +1,72 @@
+/*
+ * Copyright © 2006 Red Hat, Inc.
+ * Copyright © 2009 Chris Wilson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of the
+ * copyright holders not be used in advertising or publicity
+ * pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+ * Authors: Carl Worth <cworth@cworth.org>
+ *          Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-perf.h"
+
+#include <stdio.h>
+
+static void
+report_print (const cairo_perf_report_t *report)
+{
+    const test_report_t *tests;
+
+    tests = report->tests;
+    for (tests = report->tests; tests->name != NULL; tests++) {
+	if (tests->stats.iterations == 0)
+	    continue;
+
+	if (tests->size) {
+	    printf ("%5s-%-4s %26s-%-3d  %6.2f %4.2f%%\n",
+		    tests->backend, tests->content,
+		    tests->name, tests->size,
+		    tests->stats.median_ticks / tests->stats.ticks_per_ms,
+		    tests->stats.std_dev * 100);
+	} else {
+	    printf ("%5s %26s  %6.2f %4.2f%%\n",
+		    tests->backend, tests->name,
+		    tests->stats.median_ticks / tests->stats.ticks_per_ms,
+		    tests->stats.std_dev * 100);
+	}
+    }
+}
+
+int
+main (int argc, const char *argv[])
+{
+    int i;
+
+    for (i = 1; i < argc; i++ ) {
+	cairo_perf_report_t report;
+
+	cairo_perf_report_load (&report, argv[i], NULL);
+	report_print (&report);
+    }
+
+    return 0;
+}