linux-toradex.git/kernel/trace/trace_sched_switch.c, branch tegra-10.7.1

tracing: pass around ring buffer instead of tracer

2009-09-04T22:59:39+00:00

The latency tracers (irqsoff and wakeup) can swap trace buffers
on the fly. If an event is happening and has reserved data on one of
the buffers, and the latency tracer swaps the global buffer with the
max buffer, the result is that the event may commit the data to the
wrong buffer.

This patch changes the API to the trace recording to be recieve the
buffer that was used to reserve a commit. Then this buffer can be passed
in to the commit.

Signed-off-by: Steven Rostedt

tracing: Move sched event insertion helpers in the sched switch tracer file

2009-08-06T05:28:06+00:00

The sched events helpers which insert the sched switch and wakeup
events into the ring buffer currently reside in trace.c
But this file is quite overloaded and the right place for these helpers
is in the sched switch tracer file.

Then move them to trace_functions.c

Signed-off-by: Frederic Weisbecker 
Cc: Steven Rostedt

tracing/events: move trace point headers into include/trace/events

2009-04-15T02:05:43+00:00

Impact: clean up

Create a sub directory in include/trace called events to keep the
trace point headers in their own separate directory. Only headers that
declare trace points should be defined in this directory.

Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Neil Horman 
Cc: Zhao Lei 
Cc: Eduard - Gabriel Munteanu 
Cc: Pekka Enberg 
Signed-off-by: Steven Rostedt

ftrace: clean up enable logic for sched_switch

2009-04-07T12:43:09+00:00

Unify sched_switch and sched_wakeup's action to following logic:
Do record_cmdline when start_cmdline_record() is called.
Start tracing events when the tracer is started.

Signed-off-by: Zhao Lei 
LKML-Reference: <49D1C596.5050203@cn.fujitsu.com>
Signed-off-by: Steven Rostedt

ftrace: Add check of sched_stopped for probe_sched_wakeup

2009-04-07T12:01:11+00:00

The wakeup tracing in sched_switch does not stop when a user
disables tracing. This is because the probe_sched_wakeup() is missing
the check to prevent the wakeup from being traced.

Signed-off-by: Zhao Lei 
LKML-Reference: <49D1C543.3010307@cn.fujitsu.com>
Signed-off-by: Steven Rostedt 
Signed-off-by: Ingo Molnar

tracing: make sched_switch stop/start light weight

2009-03-18T03:10:45+00:00

The stopping and starting of a tracer should be light weight and
be able to be called in all contexts. The sched_switch grabbed
mutexes in the start/stop functions. This patch changes it to a
simple variable, on/off.

Signed-off-by: Steven Rostedt

tracing/core: use appropriate waiting on trace_pipe

2009-02-18T00:40:20+00:00

Impact: api and pipe waiting change

Currently, the waiting used in tracing_read_pipe() is done through a
100 msecs schedule_timeout() loop which periodically check if there
are traces on the buffer.

This can cause small latencies for programs which are reading the incoming
events.

This patch makes the reader waiting for the trace_wait waitqueue except
for few tracers such as the sched and functions tracers which might be
already hold the runqueue lock while waking up the reader.

This is performed through a new callback wait_pipe() on struct tracer.
If none is implemented on a specific tracer, the default waiting for
trace_wait queue is attached.

Signed-off-by: Frederic Weisbecker 
Signed-off-by: Ingo Molnar

tracing: fix typing mistake in hint message and comments

2009-02-17T17:38:24+00:00

Impact: cleanup

Fix incorrect hint message in code and typos in comments.

Signed-off-by: Wenji Huang 
Signed-off-by: Steven Rostedt

trace: Call tracing_reset_online_cpus before tracer->init()

2009-02-06T00:01:41+00:00

Impact: cleanup

To make it easy for ftrace plugin writers, as this was open coded in
the existing plugins

Signed-off-by: Arnaldo Carvalho de Melo 
Acked-by: Frédéric Weisbecker 
Signed-off-by: Ingo Molnar

trace: Remove unused trace_array_cpu parameter

2009-02-05T13:35:47+00:00

Impact: cleanup

Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Steven Rostedt 
Signed-off-by: Ingo Molnar