Apache Harmony Bootstrap JVM wrote:
*** How about you JVM experts out there? Do you have
any wisdom for me on the subject of time slicing
on an outer/inner interpreter loop interpreter
implementation? And compared to JIT? Archie Cobb,
what do you think? How about you lurkers out there? ***
Not sure if this qualifies as "wisdom" but here's how JCVM works:
- POSIX threads are used so no explicit timeslicing is needed.
- At every backward branch, executable code (or the interpreter)
reads from well-known memory location. When one thread wants to
get the attention of all other threads real fast, it munmap()'s
the memory page containing this address.
More details are in the JCVM manual:
http://jcvm.sourceforge.net/share/jc/doc/jc.html
-Archie
__________________________________________________________________________
Archie Cobbs * CTO, Awarix * http://www.awarix.com
