Intel MCU with JCC erratum

[Bernd Eckenfels]

Intel ships microcode updates for many of their processors fixing a instability in jump predictions, called the JCC erratum.

https://www.phoronix.com/scan.php?page=article&item=intel-jcc-microcode&num=1

It seems to affect jump-happy Usermode applications, and I wonder what performance impact those updates will have on JVM workloads.

And as a extension of this, the toolchain improvements Intel is working on to avoid the problematic jumps, will this also find its way in the hotspot compilers (and the OpenJDK built toolchain)

Gruss
Bernd

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