perf report: Add --max-stack option to limit callchain stack scan

[karo-tx-linux.git] / tools / perf / Documentation / perf-report.txt

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index be5ad87b6c3dfb0b0f75a3eb8a49bc517dc4ac73..10a2798712511a26616ea618a91130a6ed467345 100644 (file)
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -141,6 +141,14 @@ OPTIONS
 
        Default: fractal,0.5,callee,function.
 
+--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.
+
+       Default: 127
+
 -G::
 --inverted::
         alias for inverted caller based call graph.