2 files changed, 15 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 22ef3933342a..4fc44c75263f 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -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)
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 875d84e7ba5b..0e93282b405e 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -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,