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Commit 408cf677 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'perf-core-for-mingo-20160520' of... 

Merge tag 'perf-core-for-mingo-20160520' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

 into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

- We should not use the current value of the kernel.perf_event_max_stack as the
  default value for --max-stack in tools that can process perf.data files, they
  will only match if that sysctl wasn't changed from its default value at the
  time the perf.data file was recorded, fix it.

  This fixes a bug where a 'perf record -a --call-graph dwarf ; perf report'
  produces a glibc invalid free backtrace (Arnaldo Carvalho de Melo)

- Provide a better warning when running 'perf trace' on a system where the
  kernel.kptr_restrict is set to 1, similar to the one produced by 'perf record',
  noticed on ubuntu 16.04 where this is the default kptr_restrict setting.
  (Arnaldo Carvalho de Melo)

- Fix ordering of instructions in the annotation code, noticed when annotating
  ARM binaries, now that table is auto-ordered at first use, to avoid more such
  problems (Chris Ryder)

- Set buildid dir under symfs when --symfs is provided (He Kuang)

- Fix the 'exit_group()' syscall output in 'perf trace' (Arnaldo Carvalho de Melo)

- Only auto set call-graph to "dwarf" in 'perf trace' when syscalls are being
  traced (Arnaldo Carvalho de Melo)

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents 1ab94188 a7066709

tools/perf/Documentation/perf-report.txt

+1 −1
Original line number Diff line number Diff line
@@ -248,7 +248,7 @@ OPTIONS 
	Note that when using the --itrace option the synthesized callchain size

	will override this value if the synthesized callchain size is bigger.



	Default: /proc/sys/kernel/perf_event_max_stack when present, 127 otherwise.

	Default: 127



-G::

--inverted::

tools/perf/Documentation/perf-script.txt

+1 −1
Original line number Diff line number Diff line
@@ -267,7 +267,7 @@ include::itrace.txt[] 
        Note that when using the --itrace option the synthesized callchain size

        will override this value if the synthesized callchain size is bigger.



        Default: /proc/sys/kernel/perf_event_max_stack when present, 127 otherwise.

        Default: 127



--ns::

	Use 9 decimal places when displaying time (i.e. show the nanoseconds)

tools/perf/Documentation/perf-trace.txt

+2 −1
Original line number Diff line number Diff line
@@ -143,7 +143,8 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. 
        Implies '--call-graph dwarf' when --call-graph not present on the

        command line, on systems where DWARF unwinding was built in.



        Default: /proc/sys/kernel/perf_event_max_stack when present, 127 otherwise.

        Default: /proc/sys/kernel/perf_event_max_stack when present for

                 live sessions (without --input/-i), 127 otherwise.



--min-stack::

        Set the stack depth limit when parsing the callchain, anything

tools/perf/builtin-annotate.c

+3 −2
Original line number Diff line number Diff line
@@ -324,8 +324,9 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused) 
	OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,

		    "Skip symbols that cannot be annotated"),

	OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),

	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",

		   "Look for files with symbols relative to this directory"),

	OPT_CALLBACK(0, "symfs", NULL, "directory",

		     "Look for files with symbols relative to this directory",

		     symbol__config_symfs),

	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,

		    "Interleave source code with assembly code (default)"),

	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,

tools/perf/builtin-diff.c

+3 −2
Original line number Diff line number Diff line
@@ -812,8 +812,9 @@ static const struct option options[] = { 
	OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator",

		   "separator for columns, no spaces will be added between "

		   "columns '.' is reserved."),

	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",

		    "Look for files with symbols relative to this directory"),

	OPT_CALLBACK(0, "symfs", NULL, "directory",

		     "Look for files with symbols relative to this directory",

		     symbol__config_symfs),

	OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),

	OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",

		     "How to display percentage of filtered entries", parse_filter_percentage),