I noticed high latencies caused by a daemon periodically reading various
MSR and cpuid on all cpus. KASAN kernels would see ~10ms latencies
simply reading one cpuid. Even without KASAN, sending IPI to CPU
in deep sleep state or blocking hard IRQ in a a long section,
then waiting for the answer can
I noticed high latencies caused by a daemon periodically reading various
MSR and cpuid on all cpus. KASAN kernels would see ~10ms latencies
simply reading one cpuid. Even without KASAN, sending IPI to CPU
in deep sleep state or blocking hard IRQ in a a long section,
then waiting for the answer can
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