* [Qemu-devel] [PATCH] docs/tracing.txt: Update documentation of default backend
@ 2016-11-04 16:27 Peter Maydell
2016-11-07 13:10 ` Stefan Hajnoczi
0 siblings, 1 reply; 2+ messages in thread
From: Peter Maydell @ 2016-11-04 16:27 UTC (permalink / raw)
To: qemu-devel; +Cc: patches, Stefan Hajnoczi
In commit baf86d6b3c we switched the default trace backend from "nop"
to "log". Update the documentation to match.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
docs/tracing.txt | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/docs/tracing.txt b/docs/tracing.txt
index e62444c..f351998a 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -150,13 +150,16 @@ The trace backends are chosen at configure time:
For a list of supported trace backends, try ./configure --help or see below.
If multiple backends are enabled, the trace is sent to them all.
+If no backends are explicitly selected, configure will default to the
+"log" backend.
+
The following subsections describe the supported trace backends.
=== Nop ===
The "nop" backend generates empty trace event functions so that the compiler
-can optimize out trace events completely. This is the default and imposes no
-performance penalty.
+can optimize out trace events completely. This imposes no performance
+penalty.
Note that regardless of the selected trace backend, events with the "disable"
property will be generated with the "nop" backend.
--
2.7.4
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* Re: [Qemu-devel] [PATCH] docs/tracing.txt: Update documentation of default backend
2016-11-04 16:27 [Qemu-devel] [PATCH] docs/tracing.txt: Update documentation of default backend Peter Maydell
@ 2016-11-07 13:10 ` Stefan Hajnoczi
0 siblings, 0 replies; 2+ messages in thread
From: Stefan Hajnoczi @ 2016-11-07 13:10 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-devel, Stefan Hajnoczi, patches
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On Fri, Nov 04, 2016 at 04:27:17PM +0000, Peter Maydell wrote:
> In commit baf86d6b3c we switched the default trace backend from "nop"
> to "log". Update the documentation to match.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> docs/tracing.txt | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
Thanks, applied to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing
Stefan
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