Opensource and JVM Ports

An airhacks.fm conversation with Volker Simonis (@volker_simonis)
about: discussion about carnivorous plants, explanation of how
different carnivorous plants capture prey through movement, glue,
or digestive fluids, Utricularia uses vacuum to catch prey
underwater, SAP's interest in developing their own JVM around Java
1.4/1.5 era, challenges with SAP's NetWeaver Java EE stack,
difficulties maintaining Java across multiple Unix platforms
(HP-UX, AIX, S390, Solaris) with different vendor JVMs, SAP's
decision to license Sun's HotSpot source code, porting Hotspot to
PA-RISC architecture on HP-UX, explanation of C++ interpreter
versus Template interpreter in Hotspot, challenges with
platform-specific C++ compilers and assembler code, detailed
explanation of JVM internals including deoptimization, inlining,
and safe points, SAP's contributions to openJDK including PowerPC
port, challenges getting SAP to embrace open source, delays caused
by Oracle's acquisition of Sun, SAP's extensive JVM porting work
across multiple platforms, development of SAP JVM with additional
features like profiling safe points, creation of SAP Machine as an
open-source OpenJDK distribution, explanation of Java certification
and trademark restrictions, Hotspot Express model allowing newer VM
components in older Java versions, Volker's move to Amazon Corretto
team after 15 years at SAP, brief discussion of ABAP versus Java at
SAP, Volker's recent interest in GraalVM and native image
technologies

Volker Simonis on twitter: @volker_simonis