It is possible to repeat the --trace option to specify multiple patterns. This may be preferrable to users who do not want to create a file with a list of patterns.
Suggested-by: BALATON Zoltan <[email protected]> Signed-off-by: Stefan Hajnoczi <[email protected]> Reviewed-by: Philippe Mathieu-Daudé <[email protected]> Message-id: [email protected] Signed-off-by: Stefan Hajnoczi <[email protected]> --- docs/devel/tracing.rst | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/docs/devel/tracing.rst b/docs/devel/tracing.rst index af395e957d..e8f9b82c5e 100644 --- a/docs/devel/tracing.rst +++ b/docs/devel/tracing.rst @@ -22,10 +22,15 @@ events:: This output comes from the "log" trace backend that is enabled by default when ``./configure --enable-trace-backends=BACKENDS`` was not explicitly specified. -More than one trace event pattern can be specified by providing a file -instead:: +Multiple patterns can be specified by repeating the ``--trace`` option:: + + $ qemu --trace "kvm_*" --trace "virtio_*" ... + +When patterns are used frequently it is more convenient to store them in a +file to avoid long command-line options:: $ echo "memory_region_ops_*" >/tmp/events + $ echo "kvm_*" >>/tmp/events $ qemu --trace events=/tmp/events ... Trace events -- 2.29.2
