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authorStefan Hajnoczi <stefanha@redhat.com>2019-10-09 14:51:54 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2019-10-15 09:46:21 +0100
commitbd200384c515bdc84d52f1735c0fea43c8f61e11 (patch)
tree65e6ffeb467adb3f972ef01c9c318ad7ac84cce8
parent98b2e3c9ab3abfe476a2b02f8f51813edb90e72d (diff)
downloadfocaccia-qemu-bd200384c515bdc84d52f1735c0fea43c8f61e11.tar.gz
focaccia-qemu-bd200384c515bdc84d52f1735c0fea43c8f61e11.zip
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: 2098c56a9bc5901e145fa5d4759f075808811685
       ("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>
-rw-r--r--docs/devel/tracing.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/devel/tracing.txt b/docs/devel/tracing.txt
index 8231bbf5d1..8c0376fefa 100644
--- a/docs/devel/tracing.txt
+++ b/docs/devel/tracing.txt
@@ -317,7 +317,8 @@ probes:
                          --binary path/to/qemu-binary \
                          --target-type system \
                          --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
 logging of certain probes, a helper script "qemu-trace-stap" is provided.