1 2Specify tracing options. 3 4``[enable=]PATTERN`` 5 6 Immediately enable events matching *PATTERN* 7 (either event name or a globbing pattern). This option is only 8 available if QEMU has been compiled with the ``simple``, ``log`` 9 or ``ftrace`` tracing backend. To specify multiple events or patterns, 10 specify the :option:`-trace` option multiple times. 11 12 Use :option:`-trace help` to print a list of names of trace points. 13 14``events=FILE`` 15 16 Immediately enable events listed in *FILE*. 17 The file must contain one event name (as listed in the ``trace-events-all`` 18 file) per line; globbing patterns are accepted too. This option is only 19 available if QEMU has been compiled with the ``simple``, ``log`` or 20 ``ftrace`` tracing backend. 21 22``file=FILE`` 23 24 Log output traces to *FILE*. 25 This option is only available if QEMU has been compiled with 26 the ``simple`` tracing backend. 27