linux-toradex.git/tools, branch v2.6.31.2

perf tools: do not complain if root is owning perf.data

2009-10-05T16:32:29+00:00

commit 119e7a22bb70d84849384e5113792cd45afa4f85 upstream.

This improves patch fa6963b24 so that perf.data stuff that has
been dumped as root can be read (annotate/report) by a user
without the use of the --force.

Rationale is that root has plenty of ways to screw us (usually)
that do not require twisted schemes involving specially
crafting a perf.data.

Signed-off-by: Pierre Habouzit 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
LKML-Reference: <20090827075902.GF19653@laphroaig.corp>
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

perf tools: Fix buffer allocation

2009-10-05T16:31:46+00:00

commit a255a9981a8566a1efabec983b7811e937e662d2 upstream.

"perf top" cores dump on my dev machine, if run from a directory
where vmlinux is present:

  *** glibc detected *** malloc(): memory corruption: 0x085670d0 ***

Signed-off-by: Eric Dumazet 
LKML-Reference: <4ABB6EB7.7000002@gmail.com>
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

perf stat: Change noise calculation to use stddev

2009-09-24T15:44:00+00:00

commit 506d4bc8d5dab20d84624aa07cdc6dcd77915d52 upstream.

The current noise computation does:

 \Sum abs(n_i - avg(n)) * N^-1.5

Which is (afaik) not a regular noise function, and needs the
complete sample set available to post-process.

Change this to use a regular stddev computation which can be
done by keeping a two sums:

 stddev = sqrt( 1/N (\Sum n_i^2) - avg(n)^2 )

For which we only need to keep \Sum n_i and \Sum n_i^2.

Signed-off-by: Peter Zijlstra 
Cc: 
LKML-Reference: 
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

perf tools: Check perf.data owner

2009-08-19T13:25:51+00:00

Add an owner check to opening perf.data files and a switch to
silence it.

Because perf-report/perf-annotate are binary parsers reading
another users' perf.data file could be a security risk if the
file were explicitly engineered to trigger bugs in the parser
(we hope of course there are non such bugs, but you never
know).

Signed-off-by: Peter Zijlstra 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Paul Mackerras 
LKML-Reference: <20090819092023.896648538@chello.nl>
Signed-off-by: Ingo Molnar

perf tools: Make 'make html' work

2009-08-18T16:43:13+00:00

pushd tools/perf/Documentation
make html
popd

is failing for me...

    ASCIIDOC perf-annotate.html
ERROR: unsafe: include file: /etc/asciidoc/./stylesheets/xhtml11.css
ERROR: unsafe: include file:
/etc/asciidoc/./stylesheets/xhtml11-manpage.css
ERROR: unsafe: include file:
/etc/asciidoc/./stylesheets/xhtml11-quirks.css
make: *** [perf-annotate.html] Error 1

Apparently asciidoc "unsafe" is the default mode of operation
in practice.

https://bugzilla.redhat.com/show_bug.cgi?id=506953

Works tidily now.

Signed-off-by: Kyle McMartin 
Cc: Peter Zijlstra 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
LKML-Reference: <20090818164125.GM25206@bombadil.infradead.org>
Signed-off-by: Ingo Molnar

perf annotate: Fix segmentation fault

2009-08-18T12:00:52+00:00

Linus reported this perf annotate segfault:

        [torvalds@nehalem git]$ perf annotate unmap_vmas
        Segmentation fault

       	#0  map__clone (self=) at builtin-annotate.c:236
       	#1  thread__fork (self=) at builtin-annotate.c:372

The bug here was that builtin-annotate.c was a copy of
builtin-report.c and a threading related fix to builtin-report.c
didnt get propagated to builtin-annotate.c ...

Reported-by: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
LKML-Reference: 
Signed-off-by: Ingo Molnar

perf: Rename perf-examples.txt to examples.txt

2009-08-17T08:43:42+00:00

Rename it to examples.txt to avoid the perf-*.txt pattern in
the Makefile, otherwise 'make doc' fails because
perf-examples.txt is not formatted to be a man page:

 ERROR: perf-examples.txt: line 1: manpage document title is mandatory

Signed-off-by: Carlos R. Mafra 
Cc: Peter Zijlstra 
Cc: Paul Mackerras 
LKML-Reference: 
Signed-off-by: Ingo Molnar

perf record: Fix typo in pid_synthesize_comm_event

2009-08-15T09:59:06+00:00

We were using 'fd' locally, but there was a global 'fd' too, so
when converting from open to fopen the test made against fd
should be made against 'fp', but since we have that global
it didnt get discovered ...

Reported-by: Ulrich Drepper 
Signed-off-by: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
LKML-Reference: <20090814182632.GF3490@ghostprotocols.net>
Signed-off-by: Ingo Molnar

perf report: Don't show unresolved DSOs and symbols when -S/-d is used

2009-08-13T10:05:52+00:00

We're interested in just those symbols/DSOs, so filter out the
unresolved ones.

Signed-off-by: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
LKML-Reference: <20090812211957.GE3495@ghostprotocols.net>
Signed-off-by: Ingo Molnar

perf tools: Add a general option to enable raw sample records

2009-08-13T08:37:25+00:00

While we can enable the perf sample records per tracepoint
counter, we may also want to enable this option for every
tracepoint counters to open, so that we don't need to add a
:record flag for all of them.

Add the -R, --raw-samples options for this purpose.

Signed-off-by: Frederic Weisbecker 
Cc: Peter Zijlstra 
Cc: Arnaldo Carvalho de Melo 
Cc: Mike Galbraith 
LKML-Reference: <1250152039-7284-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar