The guest gets 128MB of RAM with the JVM heap capped at 64MB via -Xmx64m. JIT compilation is disabled with -Xint because there’s no point in JIT-compiling Java bytecode when you’re already running under a software CPU emulator compiled to WebAssembly. The JIT’s output would just be more x86 instructions for QEMU to emulate. It’s turtles compiling turtles.
The TLB lookup is combinational -- it evaluates in the same half-cycle as the limit check, requiring no additional clock. The common case (TLB hit, no page boundary crossing) adds zero overhead to a memory access. This is why the Segment Descriptor Cache and Page Cache (TLB) together occupy such substantial die area -- they are the fast path that makes protected mode competitive with real mode.
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