Hi,
well it is not real real-time -:), but rather, the threads are scheduled within the real-time scheduling class of Linux, which is soft realtime. I don't know when it will be merged in with the OpenVM version, although this has been announced, so it should be in the near future. In the mean-time I can send anyone the few files needed for soft real-time on linux. I do not have performance benchmarks yet, but I did get a significant improvemnt on a single benchmark I use which I find to strain the mem alloc, gc and string manipulation apsects of java performance. Our ultimate goat at TVT is to have pocketlinux run under pthreads real-time. Regards, -- Erik Hu wrote: Hi Philippe Based on RTSJ (www.rtj.org) proposal, I have recently modified Kaffe for real-time applications. The previous implementation has created a javax.realtime package and modified the Kaffe VM for real-time purpose (jthread) under Linux. The modification of Kaffe VM includes the priority inheritance protocol, management of RealtimeThread and PeriodicThread, and other modifications. In fact, the previous version was missing the memory modifications and some other classes of the RTSJ specification. I also simplified the creation of javax.realtime package into Klasses.jar (Klasses.jar = java.lang.* + javax.realtime.*). Now, Cris is going to complete some lacking parts of my previous implementation and separate the javax.realtime package from Klasses.jar. Could you please tell us your current achievement of pthreads porting for Real-time applications ? When will the ptherad real-time of Kaffe be merged into traditional Open Kaffe VM ? Regards,Erik |
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