From: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Date: Fri, 11 Jul 2014 03:24:37 +0000 (+0800)
Subject: trace: docs: add trace file description
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=60e17d28224bf87c36358d2418348461975bdd16;p=people%2Fliuw%2Flibxenctrl-split%2Fqemu-xen.git

trace: docs: add trace file description

When user used the trace print command from docs/tracing.txt:
  ./scripts/simpletrace.py trace-events trace-*

the user maybe be misled by the "trace-*", because if user
directly copy the comand line to run, there alway print the
bored message:
"usage: ./scripts/simpletrace.py <trace-events> <trace-file>"

then we should describe that the "trace-*" represented.

Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---

diff --git a/docs/tracing.txt b/docs/tracing.txt
index 2e035a5b3..7d3892639 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -23,7 +23,7 @@ for debugging, profiling, and observing execution.
 
 4. Pretty-print the binary trace file:
 
-    ./scripts/simpletrace.py trace-events trace-*
+    ./scripts/simpletrace.py trace-events trace-* # Override * with QEMU <pid>
 
 == Trace events ==