Hi all, While I was looking at rdtsc() code in kvm-unit-tests (e.g. x86/vmexit.c), I was getting curious that out-of-order execution on the processor may make rdtsc() executed not in the place we expect.
Referring to this document from intel, http://www.intel.com/content/www/us/en/embedded/training/ia-32-ia-64-benchmark-code-execution-paper.html they suggested to use rdtscp instruction and other techniques to serialize reading tsc register. I wonder how the serialization is achieved when using rdtsc() in kvm-unit-tests code. Or, maybe the serialization is not necessary for some reason? Thanks, Jintack -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
