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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d327e60c
...@@ -259,6 +259,16 @@ include::itrace.txt[] ...@@ -259,6 +259,16 @@ include::itrace.txt[]
--full-source-path:: --full-source-path::
Show the full path for source files for srcline output. 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:: --ns::
Use 9 decimal places when displaying time (i.e. show the nanoseconds) Use 9 decimal places when displaying time (i.e. show the nanoseconds)
......
...@@ -22,6 +22,7 @@ ...@@ -22,6 +22,7 @@
#include "util/thread_map.h" #include "util/thread_map.h"
#include "util/stat.h" #include "util/stat.h"
#include <linux/bitmap.h> #include <linux/bitmap.h>
#include <linux/stringify.h>
#include "asm/bug.h" #include "asm/bug.h"
#include "util/mem-events.h" #include "util/mem-events.h"
...@@ -2027,6 +2028,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) ...@@ -2027,6 +2028,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"only consider symbols in these pids"), "only consider symbols in these pids"),
OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]", OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
"only consider symbols in these tids"), "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, OPT_BOOLEAN('I', "show-info", &show_full_info,
"display extended information from perf.data file"), "display extended information from perf.data file"),
OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path, OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
......
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