Commit graph

67 commits

Author SHA1 Message Date
Ingo Molnar
ec1bb60bbf Merge branch 'tracing/sysprof' into auto-ftrace-next 2008-07-10 11:43:08 +02:00
Steven Rostedt
19384c0314 ftrace: limit use of check pages
The check_pages function is called often enough that it can cause problems
with trace outputs or even bringing the system to a halt.

This patch limits the check_pages to the places that are most likely to
have problems. The check is made at the flip between the global array and
the max save array, as well as when the size of the buffers changes and
the self tests.

This patch also removes the BUG_ON from check_pages and replaces it with
a WARN_ON and disabling of the tracer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: pq@iki.fi
Cc: proski@gnu.org
Cc: sandmann@redhat.com
Cc: a.p.zijlstra@chello.nl
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-26 22:39:45 +02:00
Ingo Molnar
ef4ab15ff3 ftrace: make sysprof dependent on x86 for now
that's the only tested platform for now. If there's interest we
can make it generic easily.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 23:40:01 +02:00
Ingo Molnar
a6dd24f8d0 ftrace: sysprof-plugin, add self-tests
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 23:39:38 +02:00
Steven Rostedt
4e491d14f2 ftrace: support for PowerPC
This patch adds full support for ftrace for PowerPC (both 64 and 32 bit).
This includes dynamic tracing and function filtering.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 22:43:11 +02:00
Steven Rostedt
05bd68c514 ftrace: user proper API for setting RT prios in selftest
The wakeup selftest used an internal API for setting the test task priority.
This patch fixes it to use the proper API for performing such a task.

Thanks goes to Randy Dunlap for pointing out this build failure.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 21:49:42 +02:00
Steven Rostedt
30afdcb1de ftrace: selftest protect againt max flip
There is a slight race condition in the selftest where the max update
of the wakeup and irqs/preemption off tests can be doing a max update as
the buffers are being tested. If this happens the system can crash with
a GPF.

This patch adds the max update spinlock around the checking of the
buffers to prevent such a race.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 21:15:59 +02:00
Steven Rostedt
d05cdb25d8 ftrace: fix dynamic ftrace selftest
With the adding of the configuration changes in the Makefile to prevent
tracing of functions in the ftrace code, all tracing of all the ftrace
code has been removed. Unfortunately, one of the selftests, relied on
a function to be traced. With the new change, the function was no longer
traced and the test failed.

This patch separates out the test function into its own file so that
we can add the "-pg" flag to the compilation of that function and the
adding of the mcount call to that function.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 21:13:23 +02:00
Steven Rostedt
06fa75ab56 ftrace: add TRACE_STACK and TRACE_SPECIAL to selftest validation
The selftest validation code checks for valid entries in the trace buffer.
TRACE_STACK and TRACE_SPECIAL have been added to the code but not to
the validator. This patch adds the two to prevent them from flagging a
failure in the selftest.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 21:13:12 +02:00
Ingo Molnar
57422797dc ftrace: add wakeup events to sched tracer
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 21:04:06 +02:00
Ingo Molnar
e309b41dd6 ftrace: remove notrace
now that we have a kbuild method for notrace, no need to pollute the
C code with the annotations.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:58:28 +02:00
Ingo Molnar
9ff9cdb2d3 ftrace: cleanups
clean up recent code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:56:05 +02:00
Steven Rostedt
4eebcc81a3 ftrace: disable tracing on failure
Since ftrace touches practically every function. If we detect any
anomaly, we want to fully disable ftrace. This patch adds code
to try shutdown ftrace as much as possible without doing any more
harm is something is detected not quite correct.

This only kills ftrace, this patch does have checks for other parts of
the tracer (irqsoff, wakeup, etc.).

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:54:16 +02:00
Steven Rostedt
08bafa0efc ftrace: disable all tracers on corrupted buffer
If the trace buffer is detected to be corrupted, then we
disable all tracers.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:41:22 +02:00
Steven Rostedt
77a2b37d22 ftrace: startup tester on dynamic tracing.
This patch adds a startup self test on dynamic code modification
and filters. The test filters on a specific function, makes sure that
no other function is traced, exectutes the function, then makes sure that
the function is traced.

This patch also fixes a slight bug with the ftrace selftest, where
tracer_enabled was not being set.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:41:06 +02:00
Ingo Molnar
c7aafc5497 ftrace: cleanups
factor out code and clean it up.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:40:46 +02:00
Steven Rostedt
60a11774b3 ftrace: add self-tests
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23 20:40:36 +02:00