linux-toradex.git/tools/lib/traceevent, branch v4.4-rc6

tools lib traceevent: Support %ps/%pS

2015-10-22T18:39:42+00:00

Commits such as 65dd297ac25565 ("xfs: %pF is only for function
pointers") caused a regression because pretty_print() didn't support
%ps/%pS.  The current %pf/%pF implementation in pretty_print() is what
%ps/%pS is supposed to do, so use the same code for %ps/%pS.

Addressing the incorrect %pf/%pF implementation is beyond the scope of
this patch.

Signed-off-by: Scott Wood 
Acked-by: Steven Rostedt 
Cc: Dave Chinner 
Link: http://lkml.kernel.org/r/20150831211637.GA12848@home.buserror.net
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: update KVM plugin

2015-10-20T18:54:14+00:00

The format of the role word has changed through the years and the plugin
was never updated; some VMX exit reasons were missing too.

Signed-off-by: Paolo Bonzini 
Acked-by: Steven Rostedt 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: kvm@vger.kernel.org
Link: http://lkml.kernel.org/r/1443695293-31127-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf/urgent' into perf/core to pick up fixes before pulling new changes

2015-09-23T07:42:11+00:00

Signed-off-by: Ingo Molnar

tools lib traceevent: Fix string handling in heterogeneous arch environments

2015-09-22T14:57:04+00:00

When a trace recorded on a 32-bit device is processed with a 64-bit
binary, the higher 32-bits of the address need to ignored.

The lack of this results in the output of the 64-bit pointer
value to the trace as the 32-bit address lookup fails in find_printk().

Before:

  burn-1778  [003]   548.600305: bputs:   0xc0046db2s: 2cec5c058d98c

After:

  burn-1778  [003]   548.600305: bputs:   0xc0046db2s: RT throttling activated

The problem occurs in PRINT_FIELD when the field is recognized as a
pointer to a string (of the type const char *)

Heterogeneous architectures cases below can arise and should be handled:

* Traces recorded using 32-bit addresses processed on a 64-bit machine
* Traces recorded using 64-bit addresses processed on a 32-bit machine

Reported-by: Juri Lelli 
Signed-off-by: Kapileshwar Singh 
Reviewed-by: Steven Rostedt 
Cc: David Ahern 
Cc: Javi Merino 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1442928123-13824-1-git-send-email-kapileshwar.singh@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Support function __get_dynamic_array_len

2015-09-02T19:30:46+00:00

Support helper function __get_dynamic_array_len() in libtraceevent, this
function is used accompany with __print_array() or __print_hex(), but
currently it is not an available function in the function list of
process_function().

The total allocated length of the dynamic array is embedded in the top
half of __data_loc_##item field. This patch adds new arg type
PRINT_DYNAMIC_ARRAY_LEN to return the length to eval_num_arg(),

Signed-off-by: He Kuang 
Acked-by: Namhyung Kim 
Cc: Alexei Starovoitov 
Cc: Jiri Olsa 
Cc: Masami Hiramatsu 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: Wang Nan 
Cc: Zefan Li 
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1440822125-52691-32-git-send-email-wangnan0@huawei.com
Signed-off-by: Wang Nan 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceeveent: Allow for negative numbers in print format

2015-08-28T14:47:40+00:00

It was reported that "%-8s" does not parse well when used in the printk
format. The '-' is what is throwing it off. Allow that to be included.

Reporter note:

Example before:

  transhuge-stres-10730 [004]  5897.713989: mm_compaction_finished: node=0
  zone=>-<8s order=-2119871790 ret=

Example after:

  transhuge-stres-4235  [000]   453.149280: mm_compaction_finished: node=0
  zone=ffffffff81815d7a order=9 ret=

(I will send patches to fix the string handling in the tracepoints so
it's on par with in-kernel printing via trace_pipe:)

  transhuge-stres-10921 [007] ...1  6307.140205: mm_compaction_finished: node=0
  zone=Normal   order=9 ret=partial

Reported-by: Vlastimil Babka 
Signed-off-by: Steven Rostedt 
Tested-by: Vlastimil Babka 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20150827094601.46518bcc@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Add checks for returned EVENT_ERROR type

2015-08-21T13:35:09+00:00

Running the following perf-stat command on an arm64 system produces the
following result...

  [root@aarch64 ~]# perf stat -e kmem:mm_page_alloc -a sleep 1
    Warning: [kmem:mm_page_alloc] function sizeof not defined
    Warning: Error: expected type 4 but read 0
  Segmentation fault
  [root@aarch64 ~]#

The second warning was a result of the first warning not stopping
processing after it detected the issue.

That is, code that found the issue reported the first problem, but
because it did not exit out of the functions smoothly, it caused the
other warning to appear and not only that, it later caused the SIGSEGV.

Signed-off-by: Dean Nelson 
Reviewed-by: Steven Rostedt 
Acked-by: Namhyung Kim 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20150820151632.13927.13791.email-sent-by-dnelson@teal
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Allow setting an alternative symbol resolver

2015-07-24T01:01:26+00:00

The perf tools have a symbol resolver that includes solving kernel
symbols using either kallsyms or ELF symtabs, and it also is using
libtraceevent to format the trace events fields, including via
subsystem specific plugins, like the "timer" one.

To solve fields like "timer:hrtimer_start"'s "function", libtraceevent
needs a way to map from its value to a function name and addr.

This patch provides a way for tools that already have symbol resolving
facilities to ask libtraceevent to use it when needing to resolve
kernel symbols.

Reviewed-by: Steven Rostedt 
Acked-by: David Ahern 
Cc: Adrian Hunter 
Cc: Borislav Petkov 
Cc: Frederic Weisbecker 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/n/tip-fdx1fazols17w5py26ia3bwh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib: Improve clean target

2015-07-08T20:56:13+00:00

The clean targets miss some .cmd and .d files.

Signed-off-by: Riku Voipio 
Cc: Peter Zijlstra 
Cc: linux-kbuild@vger.kernel.org
Link: http://lkml.kernel.org/r/1434631938-12681-1-git-send-email-riku.voipio@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Ignore libtrace-dynamic-list file

2015-06-08T13:30:32+00:00

The libtrace-dynamic-list file is used to export symbols used by
traceevent plugins.

Signed-off-by: He Kuang 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1432819735-35040-2-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo