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 >>> >>> [email protected] >>> http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev >>> >>> >>> >>> >> _______________________________________________ >> mlvm-dev mailing list >> [email protected] >> http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev >> > _______________________________________________ > mlvm-dev mailing list > [email protected] > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev > _______________________________________________ mlvm-dev mailing list [email protected] http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
