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trace: add --group=all to tracing.txt 

tracetool needs to know the group name ("all", "root", or a specific
subdirectory).  Also remove the stdin redirection because tracetool.py
needs the path to the trace-events file.  Update the documentation.

Fixes: 2098c56a9b
       ("trace: move setting of group name into Makefiles")
Buglink: https://bugs.launchpad.net/bugs/1844814
Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20191009135154.10970-1-stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-10-09 14:51:54 +01:00
parent 98b2e3c9ab
commit bd200384c5
1 changed files with 2 additions and 1 deletions
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3
docs/devel/tracing.txt
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@ -317,7 +317,8 @@ probes:
--binary path/to/qemu-binary \ --binary path/to/qemu-binary \
--target-type system \ --target-type system \
--target-name x86_64 \ --target-name x86_64 \
<trace-events-all >qemu.stp --group=all \
trace-events-all >qemu.stp
To facilitate simple usage of systemtap where there merely needs to be printf To facilitate simple usage of systemtap where there merely needs to be printf
logging of certain probes, a helper script "qemu-trace-stap" is provided. logging of certain probes, a helper script "qemu-trace-stap" is provided.