mirror of https://github.com/xemu-project/xemu.git
![]() kvm_stat uses syscall() to call perf_event_open(). If this function call fails, the returned value is -1, which doesn't tell the details of such failure (i.e. ENOSYS or EINVAL). This patch retrieves errno and prints it when syscall() fails. The error message will look like "Exception: perf_event_open failed, errno = 38". Signed-off-by: Wei Huang <wei@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
---|---|---|
.. | ||
kvm_flightrecorder | ||
kvm_stat | ||
vmxcap |