On 6/16/15 7:24 PM, Hemant Kumar wrote:
Because, this depends on the kernel tracepoint "kvm_hv:kvm_guest_exit". perf_prepare_sample() in the kernel side sets the event->header.misc field to PERF_RECORD_MISC_KERNEL through perf_misc_flags(pt_regs). In case of tracepoints which always get hit in the host kernel context, the perf_misc_flags() will always return PERF_RECORD_MISC_KERNEL. IMHO we will rather have to set the cpumode in the user space for this tracepoint and we can't depend on the event->header.misc field for this case. What would you suggest?
oh, right you are using a tracepoint for this. It does not have the hooks to specify cpumode. Never mind.
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