gary is currently certified at Master level.

Name: Gary Benson
Member since: 2001-05-31 00:39:54
Last Login: 2008-09-03 07:18:29

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Homepage: http://inauspicious.org/

Notes: I work for Red Hat.

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Recent blog entries by gary

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2 Sep 2008 »

Shark, now with 100% bytecode coverage

I did jsr, ret and multianewarray today; Shark now has 100% bytecode coverage.

Syndicated 2008-09-02 14:29:51 from gbenson.net

1 Sep 2008 »

DaCapo status

I’ve been working on DaCapo for nearly two weeks now, so I took a bit of time out today to figure out where I am with it:
  Status Detail Unimplemented bytecodes
antlr FAIL too many open files jsr (once)
bloat pass 718149ms multianewarray (once)
chart pass 337240ms
eclipse FAIL requires deoptimization
fop pass 37126ms
hsqldb pass 178120ms
jython FAIL requires deoptimization jsr (21 times)
luindex pass 149362ms jsr (3 times)
lusearch FAIL segfault
pmd pass 457936ms jsr (15 times)
xalan pass 174340ms jsr (8 times)

Note that this is a debug build, with no optimization and assertions enabled, so the times are in no way representative.

Syndicated 2008-09-01 14:52:12 from gbenson.net

29 Aug 2008 »

DaCapo

This past week or so I’ve been trying to get the DaCapo benchmarks running on Shark. It’s a total baptism of fire. ANTLR uses exceptions extensively, so I’ve had to implement exception handling. FOP is multithreaded, so I’ve had to implement slow-path monitor acquisition and release (all of synchronization is now done!) I’ve had to implement safepoints, unresolved field resolution, and unresolved method resolution for invokeinterface. I’ve had to replace the unentered block detection code to cope with the more complex flows introduced by exception handlers. I’ve fixed bugs in the divide-by-zero check, in aload, astore, checkcast and new, and to top it off I implemented lookupswitch for kicks. And I’m only halfway through the set of benchmarks…

Syndicated 2008-08-29 08:11:02 from gbenson.net

28 Aug 2008 »

Building Shark

For reference, this is how to reproduce my working environment and get a debuggable Shark built:

svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
cd llvm
./configure --with-pic --enable-pic
make
cd ..
hg clone http://icedtea.classpath.org/hg/icedtea6
cd icedtea6
curl http://gbenson.net/wp-content/uploads/2008/08/mixtec-hacks.patch | patch -p1
./autogen.sh
LLVM_CONFIG=$(dirname $PWD)/llvm/Debug/bin/llvm-config ./configure --enable-shark
make icedtea-against-ecj

After the initial make icedtea-against-ecj you can use make hotspot to rebuild only HotSpot</code>.

Syndicated 2008-08-28 07:58:48 from gbenson.net

20 Aug 2008 »

Shark 0.03 released

I just updated icedtea6 hg with the latest Shark. The main reason for this release is that Andrew Haley pointed out that the marked-method stuff I was using to differentiate compiled methods and interpreted methods didn’t work on amd64, and while it was possible to make it work there I didn’t like the idea of having something that needs tweaking for each new platform you build on. Now interpreted methods have the same calling convention as compiled ones, which makes the need for differentiation obsolete.

Other new features in this release include support for long, float, and double values, and a massive pile of new bytecodes. Check out the coverage page now, it’s awesome!

Syndicated 2008-08-20 09:03:53 from gbenson.net

220 older entries...

 

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