Commit 6125cc8d authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf script: Add --max-stack knob 

Works just like with 'perf report'. In some cases we may want to have
more than 127 entries, the default maximum.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-mqkz2p5ok2978gztb0vsnocc@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d327e60c

tools/perf/Documentation/perf-script.txt

+10 −0
Original line number Diff line number Diff line
@@ -259,6 +259,16 @@ include::itrace.txt[] 
--full-source-path::

	Show the full path for source files for srcline output.



--max-stack::

        Set the stack depth limit when parsing the callchain, anything

        beyond the specified depth will be ignored. This is a trade-off

        between information loss and faster processing especially for

        workloads that can have a very long callchain stack.

        Note that when using the --itrace option the synthesized callchain size

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



        Default: 127



--ns::

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

tools/perf/builtin-script.c

+5 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include "util/thread_map.h"

#include "util/stat.h"

#include <linux/bitmap.h>

#include <linux/stringify.h>

#include "asm/bug.h"

#include "util/mem-events.h"
@@ -2027,6 +2028,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) 
		   "only consider symbols in these pids"),

	OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",

		   "only consider symbols in these tids"),

	OPT_UINTEGER(0, "max-stack", &scripting_max_stack,

		     "Set the maximum stack depth when parsing the callchain, "

		     "anything beyond the specified depth will be ignored. "

		     "Default: " __stringify(PERF_MAX_STACK_DEPTH)),

	OPT_BOOLEAN('I', "show-info", &show_full_info,

		    "display extended information from perf.data file"),

	OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,

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