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* trace: allow disabling events in events fileGerd Hoffmann2012-11-161-1/+8
| | | | | | | | | | | | | | Disable trace events prefixed with a '-'. Useful to enable a group of tracepoints with exceptions, like this: usb_xhci_port_* -usb_xhci_port_read which will enable all xhci port tracepoints except reads. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* trace: added ability to comment out events in the listAlexey Kardashevskiy2012-07-191-0/+3
| | | | | | | | | | | It is convenient for debug to be able to switch on/off some events easily. The only possibility now is to remove event name from the file completely and type it again when we want it back. The patch adds '#' symbol handling as a comment specifier. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
* trace: add "-trace events" argument to control initial stateLluís2011-09-011-0/+42
The "-trace events" argument can be used to provide a file with a list of trace event names that will be enabled prior to starting execution, thus providing early tracing. This saves the user from manually toggling event states through the monitor interface or whichever backend-specific interface. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
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