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__init__.py 7.4 kB

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# Date Author Comment
781e9545 05/03/2013 02:58 pm Eiichi Tsukata

trace: Add ftrace tracing backend

This patch adds a ftrace tracing backend which sends trace event to
ftrace marker file. You can effectively compare qemu trace data and
kernel(especially, kvm.ko when using KVM) trace data.
The ftrace backend is restricted to Linux only....
93fba161 03/28/2013 03:19 pm Lluís Vilanova

trace: [tracetool] Explicitly identify public backends

Public backends are those printed by "--list-backends" and thus considered valid
by the configure script.

Signed-off-by: Lluís Vilanova <>
Signed-off-by: Stefan Hajnoczi <>
45be2f5d 03/28/2013 03:19 pm Lluís Vilanova

trace: Provide a generic tracing event descriptor

Uses tracetool to generate a backend-independent tracing event description
(struct TraceEvent).

The values for such structure are generated with the non-public "events"
backend ("events-c" frontend).

The generation of the defines to check if an event is statically enabled is also...
60481e21 03/28/2013 03:19 pm Lluís Vilanova

trace: [simple] Port to generic event information and new control interface

The backend is forced to dump event numbers using 64 bits, as TraceEventID is
an enum.

Signed-off-by: Lluís Vilanova <>
Signed-off-by: Stefan Hajnoczi <>
c6f18b91 03/28/2013 03:19 pm Lluís Vilanova

trace: [stderr] Port to generic event information and new control interface

Signed-off-by: Lluís Vilanova <>
Signed-off-by: Stefan Hajnoczi <>
eac236ea 12/23/2012 10:28 pm Lluís Vilanova

build: Use separate makefile for "trace/"

Reviewed-by: Paolo Bonzini <>
Signed-off-by: Lluís Vilanova <>
--
Changes in v2:

  • Do not depend on "qemu-timer-common.o".
  • Use "$(obj)" in rules to refer to the build sub-directory....
81dee729 11/16/2012 02:12 pm Daniel P. Berrange

Avoid all systemtap reserved words

Over time various systemtap reserved words have been blacklisted
in the trace backend generator. The list is not complete though,
so there is continued risk of problems in the future. Preempt
such problems by specifying the full list of systemtap keywords...
d8f8a860 09/23/2012 09:11 am Alon Levy

dtrace backend: add function to reserved words

Signed-off-by: Alon Levy <>
Signed-off-by: Stefan Hajnoczi <>
964d0a7b 08/14/2012 03:19 pm Stefan Weil

trace/simple: Fix compiler warning for 32 bit hosts

gcc complains when a 32 bit pointer is casted to a 64 bit integer.

Cc: Stefan Hajnoczi <>
Signed-off-by: Stefan Weil <>
Signed-off-by: Stefan Hajnoczi <>
62bab732 07/19/2012 01:34 pm Harsh Prateek Bora

Simpletrace v2: Support multiple arguments, strings.

Existing simpletrace backend allows to trace at max 6 args and does not
support strings. This newer tracelog format gets rid of fixed size records
and therefore allows to trace variable number of args including strings....

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