Is the call site megamutable? (Is it linked many times instead of once?) -- John
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 >> >> >> > > _______________________________________________ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
