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

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

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

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

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