[Lldb-commits] [lldb] r137092 - /lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py
Johnny Chen
johnny.chen at apple.com
Mon Aug 8 17:56:07 PDT 2011
Author: johnny
Date: Mon Aug 8 19:56:07 2011
New Revision: 137092
URL: http://llvm.org/viewvc/llvm-project?rev=137092&view=rev
Log:
Check in a customized benchmark which compares the Xcode 4.1 vs. Xcode 4.2's gdb disassembly speed
on lldb's Driver::MainLoop function which is ~1190 lines of x86 assembly code. This file is not
exercised during the normal test suite run, i.e., no +b option specified. So it should be ok.
The following is the benchmark result on my MBP running OSX Lion:
[17:38:46] johnny:/Volumes/data/lldb/svn/trunk/test $ ./dotest.py -v +b -p TestFlintVsSlate
/Volumes/data/lldb/svn/trunk/build/Debug
LLDB-71
Path: /Volumes/data/lldb/svn/trunk
URL: https://johnny@llvm.org/svn/llvm-project/lldb/trunk
Repository Root: https://johnny@llvm.org/svn/llvm-project
Repository UUID: 91177308-0d34-0410-b5e6-96231b3b80d8
Revision: 137008
Node Kind: directory
Schedule: normal
Last Changed Author: gclayton
Last Changed Rev: 137008
Last Changed Date: 2011-08-05 17:50:36 -0700 (Fri, 05 Aug 2011)
Session logs for test failures/errors/unexpected successes will go into directory '2011-08-08-17_38_52'
Command invoked: python ./dotest.py -v +b -p TestFlintVsSlate
----------------------------------------------------------------------
Collected 2 tests
1: test_run_41_then_42 (TestFlintVsSlateGDBDisassembly.FlintVsSlateGDBDisassembly)
Test disassembly on a large function with 4.1 vs. 4.2's gdb. ...
4.1 gdb benchmark: Avg: 0.205623 (Laps: 5, Total Elapsed Time: 1.028113)
4.2 gdb benchmark: Avg: 0.201970 (Laps: 5, Total Elapsed Time: 1.009849)
gdb_42_avg/gdb_41_avg: 0.982236
ok
2: test_run_42_then_41 (TestFlintVsSlateGDBDisassembly.FlintVsSlateGDBDisassembly)
Test disassembly on a large function with 4.1 vs. 4.2's gdb. ...
4.2 gdb benchmark: Avg: 0.202602 (Laps: 5, Total Elapsed Time: 1.013012)
4.1 gdb benchmark: Avg: 0.204418 (Laps: 5, Total Elapsed Time: 1.022089)
gdb_42_avg/gdb_41_avg: 0.991119
ok
----------------------------------------------------------------------
Ran 2 tests in 15.688s
OK
Added:
lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py
Added: lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py?rev=137092&view=auto
==============================================================================
--- lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py (added)
+++ lldb/trunk/test/benchmarks/disassembly/TestFlintVsSlateGDBDisassembly.py Mon Aug 8 19:56:07 2011
@@ -0,0 +1,92 @@
+"""Disassemble lldb's Driver::MainLoop() functions comparing Xcode 4.1 vs. 4.2's gdb."""
+
+import os, sys
+import unittest2
+import lldb
+import pexpect
+from lldbbench import *
+
+class FlintVsSlateGDBDisassembly(BenchBase):
+
+ mydir = os.path.join("benchmarks", "example")
+
+ def setUp(self):
+ BenchBase.setUp(self)
+ self.gdb_41_exe = '/Flint/usr/bin/gdb'
+ self.gdb_42_exe = '/Developer/usr/bin/gdb'
+ self.exe = self.lldbExec
+ self.function = 'Driver::MainLoop()'
+ self.gdb_41_avg = None
+ self.gdb_42_avg = None
+
+ @benchmarks_test
+ def test_run_41_then_42(self):
+ """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
+ print
+ self.run_gdb_disassembly(self.gdb_41_exe, self.exe, self.function, 5)
+ print "4.1 gdb benchmark:", self.stopwatch
+ self.gdb_41_avg = self.stopwatch.avg()
+ self.run_gdb_disassembly(self.gdb_42_exe, self.exe, self.function, 5)
+ print "4.2 gdb benchmark:", self.stopwatch
+ self.gdb_42_avg = self.stopwatch.avg()
+ print "gdb_42_avg/gdb_41_avg: %f" % (self.gdb_42_avg/self.gdb_41_avg)
+
+ @benchmarks_test
+ def test_run_42_then_41(self):
+ """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
+ print
+ self.run_gdb_disassembly(self.gdb_42_exe, self.exe, self.function, 5)
+ print "4.2 gdb benchmark:", self.stopwatch
+ self.gdb_42_avg = self.stopwatch.avg()
+ self.run_gdb_disassembly(self.gdb_41_exe, self.exe, self.function, 5)
+ print "4.1 gdb benchmark:", self.stopwatch
+ self.gdb_41_avg = self.stopwatch.avg()
+ print "gdb_42_avg/gdb_41_avg: %f" % (self.gdb_42_avg/self.gdb_41_avg)
+
+ def run_gdb_disassembly(self, gdb_exe_path, exe, function, count):
+ # Set self.child_prompt, which is "(gdb) ".
+ self.child_prompt = '(gdb) '
+ prompt = self.child_prompt
+
+ # So that the child gets torn down after the test.
+ self.child = pexpect.spawn('%s %s' % (gdb_exe_path, exe))
+ child = self.child
+
+ # Turn on logging for what the child sends back.
+ if self.TraceOn():
+ child.logfile_read = sys.stdout
+
+ child.expect_exact(prompt)
+ child.sendline('break %s' % function)
+ child.expect_exact(prompt)
+ child.sendline('run')
+ child.expect_exact(prompt)
+
+ # Reset the stopwatch now.
+ self.stopwatch.reset()
+ for i in range(count):
+ with self.stopwatch:
+ # Disassemble the function.
+ child.sendline('disassemble')
+ child.expect_exact(prompt)
+ child.sendline('next')
+ child.expect_exact(prompt)
+
+ child.sendline('quit')
+ child.expect_exact('The program is running. Exit anyway?')
+ child.sendline('y')
+ try:
+ self.child.expect(pexpect.EOF)
+ except:
+ pass
+
+ if self.TraceOn():
+ print "gdb disassembly benchmark:", str(self.stopwatch)
+ self.child = None
+
+
+if __name__ == '__main__':
+ import atexit
+ lldb.SBDebugger.Initialize()
+ atexit.register(lambda: lldb.SBDebugger.Terminate())
+ unittest2.main()
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