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trace: make the 'log' backend timestamp configurable

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Timestamps in tracing output can be distracting. Make it possible to
control tid/timestamp printing with -msg timestamp=on|off. The default
is no tid/timestamps. Previously they were always printed.

Suggested-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210125113507.224287-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2021-01-25 11:35:07 +00:00
parent 651d588f03
commit 418ed14268
2 changed files with 16 additions and 6 deletions
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3
docs/devel/tracing.rst
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@ -224,6 +224,9 @@ effectively turns trace events into debug printfs.
This is the simplest backend and can be used together with existing code that
uses DPRINTF().
The -msg timestamp=on|off command-line option controls whether or not to print
the tid/timestamp prefix for each trace event.
Simpletrace
-----------