linux-toradex.git/Documentation/trace, branch tegra-10.9.7

tracing: Fix comment typo and documentation example

2009-10-24T09:07:50+00:00

Trivial patch to fix a documentation example and to fix a
comment.

Signed-off-by: Jiri Olsa 
Signed-off-by: Steven Rostedt 
Cc: Frederic Weisbecker 
LKML-Reference: <20091023233646.871719877@goodmis.org>
Signed-off-by: Ingo Molnar

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2009-09-22T14:51:45+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
  trivial: fix typo in aic7xxx comment
  trivial: fix comment typo in drivers/ata/pata_hpt37x.c
  trivial: typo in kernel-parameters.txt
  trivial: fix typo in tracing documentation
  trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c
  trivial: add __init macro/ fix of __exit macro location in ipmi_poweroff.c
  trivial: remove unnecessary semicolons
  trivial: Fix duplicated word "options" in comment
  trivial: kbuild: remove extraneous blank line after declaration of usage()
  trivial: improve help text for mm debug config options
  trivial: doc: hpfall: accept disk device to unload as argument
  trivial: doc: hpfall: reduce risk that hpfall can do harm
  trivial: SubmittingPatches: Fix reference to renumbered step
  trivial: fix typos "man[ae]g?ment" -> "management"
  trivial: media/video/cx88: add __init/__exit macros to cx88 drivers
  trivial: fix typo in CONFIG_DEBUG_FS in gcov doc
  trivial: fix missing printk space in amd_k7_smp_check
  trivial: fix typo s/ketymap/keymap/ in comment
  trivial: fix typo "to to" in multiple files
  trivial: fix typos in comments s/DGBU/DBGU/
  ...

tracing, documentation: Add a document on the kmem tracepoints

2009-09-22T14:17:34+00:00

Knowing tracepoints exist is not quite the same as knowing what they
should be used for.  This patch adds a document giving a basic description
of the kmem tracepoints and why they might be useful to a performance
analyst.

Signed-off-by: Mel Gorman 
Cc: Rik van Riel 
Reviewed-by: Ingo Molnar 
Cc: Larry Woodman 
Cc: Peter Zijlstra 
Cc: Li Ming Chun 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tracing, documentation: add a document describing how to do some performance analysis with tracepoints

2009-09-22T14:17:34+00:00

The documentation for ftrace, events and tracepoints is pretty extensive.
Similarly, the perf PCL tools help files --help are there and the code
simple enough to figure out what much of the switches mean.  However,
pulling the discrete bits and pieces together and translating that into
"how do I solve a problem" requires a fair amount of imagination.

This patch adds a simple document intended to get someone started on the

Signed-off-by: Mel Gorman 
Cc: Rik van Riel 
Reviewed-by: Ingo Molnar 
Cc: Larry Woodman 
Cc: Peter Zijlstra 
Cc: Li Ming Chun 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tracing, page-allocator: add a postprocessing script for page-allocator-related ftrace events

2009-09-22T14:17:34+00:00

This patch adds a simple post-processing script for the
page-allocator-related trace events.  It can be used to give an indication
of who the most allocator-intensive processes are and how often the zone
lock was taken during the tracing period.  Example output looks like

Process                   Pages      Pages      Pages    Pages       PCPU     PCPU     PCPU   Fragment Fragment  MigType Fragment Fragment  Unknown
details                  allocd     allocd      freed    freed      pages   drains  refills   Fallback  Causing  Changed   Severe Moderate
                                under lock     direct  pagevec      drain
swapper-0                     0          0          2        0          0        0        0          0        0        0        0        0        0
Xorg-3770                 10603       5952       3685     6978       5996      194      192          0        0        0        0        0        0
modprobe-21397               51          0          0       86         31        1        0          0        0        0        0        0        0
xchat-5370                  228         93          0        0          0        0        3          0        0        0        0        0        0
awesome-4317                 32         32          0        0          0        0       32          0        0        0        0        0        0
thinkfan-3863                 2          0          1        1          0        0        0          0        0        0        0        0        0
hald-addon-stor-3935          2          0          0        0          0        0        0          0        0        0        0        0        0
akregator-4506                1          1          0        0          0        0        1          0        0        0        0        0        0
xmms-14888                    0          0          1        0          0        0        0          0        0        0        0        0        0
khelper-12                    1          0          0        0          0        0        0          0        0        0        0        0        0

Optionally, the output can include information on the parent or aggregate
based on process name instead of aggregating based on each pid. Example output
including parent information and stripped out the PID looks something like;

Process                        Pages      Pages      Pages    Pages       PCPU     PCPU     PCPU   Fragment Fragment  MigType Fragment Fragment  Unknown
details                       allocd     allocd      freed    freed      pages   drains  refills   Fallback  Causing  Changed   Severe Moderate
                                     under lock     direct  pagevec      drain
gdm-3756 :: Xorg-3770           3796       2976         99     3813       3224      104       98          0        0        0        0        0        0
init-1 :: hald-3892                1          0          0        0          0        0        0          0        0        0        0        0        0
git-21447 :: editor-21448          4          0          4        0          0        0        0          0        0        0        0        0        0

This says that Xorg allocated 3796 pages and it's parent process is gdm
with a PID of 3756;

The postprocessor parses the text output of tracing.  While there is a
binary format, the expectation is that the binary output can be readily
translated into text and post-processed offline.  Obviously if the text
format changes, the parser will break but the regular expression parser is
fairly rudimentary so should be readily adjustable.

Signed-off-by: Mel Gorman 
Cc: Rik van Riel 
Reviewed-by: Ingo Molnar 
Cc: Larry Woodman 
Cc: Peter Zijlstra 
Cc: Li Ming Chun 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

trivial: fix typo in tracing documentation

2009-09-21T13:15:52+00:00

Signed-off-by: Michal Sojka 
Signed-off-by: Jiri Kosina

trivial: fix typos "man[ae]g?ment" -> "management"

2009-09-21T13:14:56+00:00

Signed-off-by: Uwe Kleine-Koenig 
Signed-off-by: Jiri Kosina

tracing, perf: Convert the power tracer into an event tracer

2009-09-19T09:42:12+00:00

This patch converts the existing power tracer into an event tracer,
so that power events (C states and frequency changes) can be
tracked via "perf".

This also removes the perl script that was used to demo the tracer;
its functionality is being replaced entirely with timechart.

Signed-off-by: Arjan van de Ven 
Acked-by: Peter Zijlstra 
Cc: Paul Mackerras 
Cc: Frederic Weisbecker 
LKML-Reference: <20090912130542.6d314860@infradead.org>
Signed-off-by: Ingo Molnar

Merge branch 'linus' into tracing/core

2009-09-17T18:53:10+00:00

Merge reason: Pick up kernel/softirq.c update for dependent fix.

Signed-off-by: Ingo Molnar

debugfs: Fix mount directory of debugfs by default in events.txt

2009-09-15T16:50:48+00:00

We need common default directory of denbugfs for consistency.
(debugfs's default directory is /sys/kernel/debug/ by debugfs.)

Signed-off-by: GeunSik Lim 
Signed-off-by: Greg Kroah-Hartman