It was some sort of bitrot. I pushed a fix for this to mlvm/hotspot.
Thanks for the reports! -- John On Jun 5, 2010, at 10:58 AM, Rémi Forax wrote: > Le 05/06/2010 02:01, John Rose a écrit : >> Is the call site megamutable? (Is it linked many times instead of once?) >> -- John >> > > no ! > The callsite is linked only once. > > Rémi > >> On Jun 4, 2010, at 4:40 AM, Rémi Forax wrote: >> >> >>> It's funny, I've found the same error last night. >>> >>> Yes, there is a problem, >>> if you run with -XX:+PrintCompilation, you will see >>> lot of "made not entrant" on the same bytecode location. >>> >>> 183% made not entrant (2) Hello::main @ -2 (145 bytes) >>> 184% Hello::main @ 6 (145 bytes) >>> >>> It seems that invokedynamic have trouble and >>> cycle between optimization and deoptimization phases. >>> >>> Rémi >>> >>> Le 04/06/2010 10:43, Eric Bodden a écrit : >>> >>>> Hi all. >>>> >>>> I did some simple micro-benchmarking with the current implementation >>>> of invokedynamic. In the attached test class, I call a method >>>> "greeter" 100,000,000 times using invokedynamic and then using >>>> reflection. Reflection only takes about 1338ms, while invokedynamic >>>> takes about 12099. (This was taken on OSX 10.6, with build >>>> "1.7.0-internal-stephen_2010_05_28_19_48-b00"). By the way >>>> invokedynamic works, I had expected it to be at least as fast as a >>>> reflective call. >>>> >>>> Can you tell me if this kind of performance is expected in general? >>>> >>>> Best wishes, >>>> Eric >>>> >>>> -- >>>> Dr. Eric Bodden >>>> Software Technology Group, Technische Universität Darmstadt, Germany >>>> Tel: +49 6151 16-5478 Fax: +49 6151 16-5410 >>>> Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
