summaryrefslogtreecommitdiffstats
path: root/tests/benchmarks
diff options
context:
space:
mode:
authorThiago Macieira <thiago.macieira@nokia.com>2010-08-17 18:20:28 (GMT)
committerThiago Macieira <thiago.macieira@nokia.com>2010-08-24 10:36:35 (GMT)
commit64a6ce5fb031f151994f77b9d9abea52bb9e00d3 (patch)
tree19a6d59caaa192f2ea54a25f833535f6a8d58d4a /tests/benchmarks
parentca9d0f597fe6212aa89fa2d6d45b27bae147d195 (diff)
downloadQt-64a6ce5fb031f151994f77b9d9abea52bb9e00d3.zip
Qt-64a6ce5fb031f151994f77b9d9abea52bb9e00d3.tar.gz
Qt-64a6ce5fb031f151994f77b9d9abea52bb9e00d3.tar.bz2
Add a script to generate real-world data from applications
Diffstat (limited to 'tests/benchmarks')
-rw-r--r--tests/benchmarks/corelib/tools/qstring/generatelist.pl200
1 files changed, 200 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/tools/qstring/generatelist.pl b/tests/benchmarks/corelib/tools/qstring/generatelist.pl
new file mode 100644
index 0000000..ed4c8eb
--- /dev/null
+++ b/tests/benchmarks/corelib/tools/qstring/generatelist.pl
@@ -0,0 +1,200 @@
+#!/usr/bin/perl
+## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+## All rights reserved.
+## Contact: Nokia Corporation (qt-info@nokia.com)
+##
+## This file is part of the QtCore module of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## No Commercial Usage
+## This file contains pre-release code and may not be distributed.
+## You may use this file in accordance with the terms and conditions
+## contained in the Technology Preview License Agreement accompanying
+## this package.
+##
+## GNU Lesser General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU Lesser
+## General Public License version 2.1 as published by the Free Software
+## Foundation and appearing in the file LICENSE.LGPL included in the
+## packaging of this file. Please review the following information to
+## ensure the GNU Lesser General Public License version 2.1 requirements
+## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+##
+## In addition, as a special exception, Nokia gives you certain additional
+## rights. These rights are described in the Nokia Qt LGPL Exception
+## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+##
+## If you have questions regarding the use of this file, please contact
+## Nokia at qt-info@nokia.com.
+##
+##
+##
+##
+##
+##
+##
+##
+## $QT_END_LICENSE$
+#
+# Parses a file (passed as argument) that contains a dump of pairs of
+# strings and generates C source code including said data.
+#
+# The format of the file is:
+# LEN = <len> <keyword> <align1> <align2>\n<data1><data2>\n
+# where:
+# LEN the literal string "LEN"
+# <len> the length of the data, in 16-bit words
+# <keyword> the literal string "SAME" or "DIFF"
+# <align1> the alignment or pointer value of the first data
+# <align2> the alignment or pointer value of the second data
+# <data1> the first data
+# <data2> the second data
+# \n newline
+#
+# The C code to write this data would be:
+# fprintf(out, "LEN = %d %s %d %d\n", len,
+# (p1 == p2) : "SAME" : "DIFF",
+# (int)p1 & 0xfff, (int)p2 & 0xfff);
+# fwrite(p1, 2, len, out);
+# fwrite(p2, 2, len, out);
+# fwrite("\n", 1, 1, out);
+
+sub printUshortArray($$$) {
+ $str = $_[0];
+ $align = $_[1] & 0x1f;
+ $offset = $_[2];
+
+ die if ($align & 1) != 0;
+ $align /= 2;
+
+ $len = (length $str) / 2;
+ $headpadding = $align & 0x7;
+ $tailpadding = 8 - (($len + $headpadding) & 0x7);
+ $multiplecachelines = ($align + $len) > 0x20;
+
+ if ($multiplecachelines) {
+ # if this string crosses into a new cacheline, then
+ # replicate the result
+ $headpadding |= ($offset & ~0x1f);
+ $headpadding += 0x20
+ if ($headpadding < $offset);
+ $headpadding -= $offset;
+ ++$cachelinecrosses;
+ }
+ for $i (1..$headpadding) {
+ print 65536-$i,",";
+ }
+ print "\n " if ($headpadding > 0);
+ print " " if ($headpadding == 0);
+
+ for ($i = 0; $i < $len * 2; $i += 2) {
+ print " ", ord(substr($str, $i, 1)) +
+ ord(substr($str, $i + 1, 1)) * 256,
+ ",";
+ }
+ print "\n " if ($tailpadding > 0);
+
+ for $i (1..$tailpadding) {
+ print 65536-$i, ",";
+ }
+ print " // ", $offset + $headpadding + $len + $tailpadding;
+ print "+" if $multiplecachelines;
+
+ return ($offset + $headpadding, $offset + $headpadding + $len + $tailpadding);
+}
+
+print "static const ushort stringCollectionData[] __attribute__((aligned(16))) = { \n";
+$count = 0;
+$offset = 0;
+$totalsize = 0;
+$maxlen = 0;
+$cachelinecrosses = 0;
+
+open IN, "<" . $ARGV[0];
+while (1) {
+ $line = readline(*IN);
+ last unless defined($line);
+ $line =~ /LEN = (\d+) (\w+) (\d+) (\d+)/;
+ $len = $1;
+ $data[$count]->{len} = $len;
+ $sameptr = $2;
+ $data[$count]->{align1} = $3 - 0;
+ $data[$count]->{align2} = $4 - 0;
+
+ # statistics
+ $alignhistogram{$3 & 0xf}++;
+ $alignhistogram{$4 & 0xf}++;
+ $samealignments{$3 & 0xf}++ if ($3 & 0xf) == ($4 & 0xf);
+
+ read IN, $a, $len * 2;
+ read IN, $b, $len * 2;
+
+ <IN>; # Eat the newline
+
+ if ($len == 0) {
+ $data[$count]->{offset1} = $offset;
+ $data[$count]->{offset2} = $data[$count]->{offset1};
+ ++$data[$count]->{offset2} if ($sameptr eq "DIFF");
+ } else {
+ print " // #$count\n";
+ print " ";
+ ($data[$count]->{offset1}, $offset) =
+ printUshortArray($a, $data[$count]->{align1}, $offset);
+ print "\n ";
+ die if ($offset & 0x7) != 0;
+
+ if ($sameptr eq "DIFF") {
+ ($data[$count]->{offset2}, $offset) =
+ printUshortArray($b, $data[$count]->{align2}, $offset);
+ print "\n\n";
+ } else {
+ $data[$count]->{offset2} = $data[$count]->{offset1};
+ print "\n\n";
+ }
+ }
+ ++$count;
+
+ $totalsize += $len;
+ $maxlen = $len if $len > $maxlen;
+}
+print "\n};\n";
+close IN;
+
+print "static struct StringCollection\n";
+print "{\n";
+print " int len;\n";
+print " int offset1, offset2;\n";
+print " ushort align1, align2;\n";
+print "} stringCollection[] = {\n";
+
+for $i (0..$count-1) {
+ print " {",
+ $data[$i]->{len}, ", ",
+ $data[$i]->{offset1}, ", ",
+ $data[$i]->{offset2}, ", ",
+ $data[$i]->{align1}, ", ",
+ $data[$i]->{align2},
+ "}, // #$i\n";
+ next if $data[$i]->{len} == 0;
+ die if (($data[$i]->{offset1} & 0x7) != ($data[$i]->{align1} & 0xf)/2);
+ die if (($data[$i]->{offset2} & 0x7) != ($data[$i]->{align2} & 0xf)/2);
+}
+print "};\n";
+
+print "static const int stringCollectionCount = $count;\n";
+print "static const int stringCollectionMaxLen = $maxlen;\n";
+printf "// average comparison length: %.4f\n", ($totalsize * 1.0 / $count);
+printf "// cache-line crosses: %d (%.1f%%)\n",
+ $cachelinecrosses, ($cachelinecrosses * 100.0 / $count / 2);
+
+print "// alignment histogram:\n";
+for $key (sort { $a <=> $b } keys(%alignhistogram)) {
+ $value = $alignhistogram{$key};
+ $samealigned = $samealignments{$key};
+ printf "// 0xXXX%x = %d (%.1f%%) strings, %d (%.1f%%) of which same-aligned\n",
+ $key, $value, $value * 100.0 / ($count*2),
+ $samealigned, $samealigned * 100.0 / $value;
+ $samealignedtotal += $samealigned;
+}
+printf "// total = %d (100%) strings, %d (%.1f%%) of which same-aligned\n",
+ $count * 2, $samealignedtotal, $samealignedtotal * 100 / $count / 2;