Intel MCU with JCC erratum
ecki at zusammenkunft.net
Tue Nov 12 21:20:45 UTC 2019
Intel ships microcode updates for many of their processors fixing a instability in jump predictions, called the JCC erratum.
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)
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