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Divergence with tcmalloc on arm64 #3740
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The kernel side of this is https://lore.kernel.org/all/[email protected]/T/ |
(I also confirmed that it's |
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I'm seeing the following divergence while replaying a tcmalloc-utilizing program on arm64:
I suspect this to be caused by accesses to
CNTVCT_EL0
in the tcmalloc code. Unfortunately the kernel does not support trapping on count register access on arm64:It would be possible for the kernel to configure the CPU to trap on this access by clearing
CNTKCTL_EL1.EL0VCTEN
.The text was updated successfully, but these errors were encountered: