leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf script: Add --max-stack knob

Browse Source 
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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-04-14 18:15:18 -03:00
parent d327e60cfa
commit 6125cc8dac
2 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
tools/perf/Documentation/perf-script.txt
View File

@ -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)

5
tools/perf/builtin-script.c
View File

@ -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,