First invokedynamic call on SPARC

Today I successfully executed an invokedynamic call on SPARC for the first time.  Excellent!

$ bin/jruby.gamma -J-XX:+UseSerialGC -J-Djruby.compile.invokedynamic=true -J-Xint -J-XX:+UnlockExperimentalVMOptions -J-XX:+EnableMethodHandles -J-XX:+EnableInvokeDynamic bench/bench_fib_recursive.rb 
OpenJDK Server VM (17.0-b08-internal-jvmg) for solaris-sparc JRE (1.7.0), built on Feb 25 2010 04:35:47 by "ct232829" with Workshop 5.9
VM option '+UseSerialGC'
VM option '+UnlockExperimentalVMOptions'
VM option '+EnableMethodHandles'
VM option '+EnableInvokeDynamic'
 52.813000   0.000000  52.813000 ( 52.296000)
 52.824000   0.000000  52.824000 ( 52.823000)
 51.808000   0.000000  51.808000 ( 51.808000)
 49.740000   0.000000  49.740000 ( 49.740000)
 49.450000   0.000000  49.450000 ( 49.450000)

MethodHandle calls already work since a couple of days and I can run the JDK MethodHandlesTest without any errors:

$ gamma -Xinternalversion
OpenJDK Server VM (17.0-b08-internal-jvmg) for solaris-sparc JRE (1.7.0), built on Feb 25 2010 04:35:47 by "ct232829" with Workshop 5.9
$ gamma -Xint -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles -classpath /java/devtools/share/junit/latest/junit.jar:. org.junit.runner.JUnitCore MethodHandlesTestVM option '+UnlockExperimentalVMOptions'
VM option '+EnableMethodHandles'
JUnit version 4.4
OpenJDK Server VM warning: JSR 292 invokedynamic is disabled in this JVM.  Use -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic to enable.
.IIIIII.findStatic
:::::::::::.findVirtual
:::::::::::::::.findSpecial
::.bind
::::::::::::::::::::::.unreflect
::::::::::::::::::::::::I.unreflectGetter
.unreflectSetter
.arrayElementGetter
.arrayElementSetter
.convertArguments
::::::.permuteArguments
.spreadArguments
.collectArguments
.insertArguments
.filterArguments
.foldArguments
.dropArguments
.exactInvoker, genericInvoker, varargsInvoker, dynamicInvoker
.guardWithTest
.catchException
.throwException
.testCastFailure

Time: 7.984

OK (23 tests)

JSR 292 SPARC support is on its way...

Syndicated 2010-02-25 12:57:50 from twisti's weblog

JSR 292 server compiler support in JDK 7 b80

About two weeks ago I pushed the remaining changes (<font>6894206, </font><font>6893081, </font><font>6829187, </font><font>6893268</font>) for C2 invokedynamic support on x86 which were integrated into HotSpot 17 b07.  Meanwhile HS17b07 has been integrated into JDK 7 b80 and the latter has been released.

With two changesets <font></font>John Rose pushed lately (<font>6891770, </font><font>6914665)</font>, which have been integrated into JDK 7 b79, you can run now invokedynamic enabled programs with decent performance.  Additionally we tuned inlining heuristics a little (<font>6912063) to be able to use inline-related</font> switches in a product VM and to not count generated MethodHandle adapters.

And here is how it works (gwt is a simple testcase for guardWithTest):

$ java -server -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles -XX:+EnableInvokeDynamic gwt
370655678

You can also run JRuby benchmarks, like <font face="courier new,courier,monospace">bench_fractal.rb</font> which prints a nice fractal (we need to tune inlining heuristics a little to get good performance):

$ bin/jruby --server -J-Djruby.compile.invokedynamic=true -J-XX:+UnlockExperimentalVMOptions -J-XX:+EnableMethodHandles -J-XX:+EnableInvokeDynamic -J-XX:InlineSmallCode=2500 -J-XX:MaxInlineSize=50 bench/bench_fractal.rb
Rendering
<snip>

(To see the fractal you have to try it yourself :-)

The next thing will be C1 support.  I'm currently working on it and it's almost finished.

Syndicated 2010-01-22 13:33:16 from twisti's weblog

One

It's exactly one year ago that I started to work for Sun.  Nice!  I wasn't sure that I will make the anniversary facing the merger with Oracle.  Anyway, I learned a lot in this first year and I'm really looking forward to the next years at Sun (or whatever the company will be called then).

Syndicated 2010-01-12 09:25:35 from twisti's weblog

Compiz and the Meta key in Emacs

When I switched back to OpenSolaris I wanted to use Compiz instead of Metacity to have at least some eye candy.  After switching to Compiz I noticed that the Meta key is not working in Emacs.  Since it worked in the "Normal Visual Effects" mode I was sure it's related to one of the Compiz plugins that was turned on by default in the "Custom" mode.

After some trial and error I found out that the "Group and Tab Windows" in the "Window Management" section is the bugger.  It uses a couple of <Mod4> key bindings and one of them is <Mod4>x.

Disabling that plugin makes M-x work again in Emacs.

Syndicated 2009-10-02 15:33:22 from twisti's weblog

Back to OpenSolaris (and DBX)

A few months ago I got a new laptop (unibody MacBook Pro) and I decided to stay with Mac OS X because of two main reasons: Broadcom WiFi and the touchpad.  Everything looked very slick and worked, obviously, out-of-the-box.  A perfect OS for private use.

But developing on that OS is a pain in the...  Apple's GDB drives me nuts!  It was crashing every now and then and was 95% of the time not able to call simple C++ instance methods.  Completely useless!!!

I filed a few bugs in Apple's Radar and tried to get the FSF guys to support Darwin in their GDB.  Some help in both cases, but nothing I could really use.

So, yesterday I decided to bite the bullet, install OpenSolaris again, use NDIS Wrapper for the Broadcom WiFi and to give the xorg-input-synaptics package of SFE a try for the touchpad.  The first one is working flawlessly, but only in 32-bit mode.  That means I can't test 64-bit HotSpot locally.  Well, I can live with that for some time.  I didn't have time to try the second one yet but I hope it works.

Glad to be back.

Syndicated 2009-10-02 15:14:58 from twisti's weblog