I'll also add that I was never able to get the instability to show up when running the classic stress testing tools: MemBench, Prime95, and Intel's own stability tests could all run for hours and pass.
There's something unique about the workload of ninja launching a bunch of clang processes that draws this out.
On my machine, a clean build of the llvm-project would consistently fail to complete, so that may be a reasonable workload to A/B test with if you're looking into this.
The user quoted above was running gentoo builds on specific p-cores to test various solutions, ultimately finding that the p-core limit was the only fix that yielded stability.
There's something unique about the workload of ninja launching a bunch of clang processes that draws this out.
On my machine, a clean build of the llvm-project would consistently fail to complete, so that may be a reasonable workload to A/B test with if you're looking into this.
The user quoted above was running gentoo builds on specific p-cores to test various solutions, ultimately finding that the p-core limit was the only fix that yielded stability.