diff --git a/plan/README.md b/plan/README.md
index 7e29e6e622503c568f3f020b3cf2d1ea6b221658..904c74510a438d433f235e208ac4df38cc84ca68 100644
--- a/plan/README.md
+++ b/plan/README.md
@@ -85,7 +85,7 @@
 * Multi-threads
 * binfmt_flat
 
-## Debugging, Tracing and Tuning
+## Debugging, Profiling, Tracing and Tuning
 
 * Stacktrace @zhao305149619
 * Tracepoint
@@ -103,6 +103,7 @@
 * Ptrace
 * Crash
 * Kexec & Kdump
+* PMU (Performance Monitor Unit)
 * kcov
 * KGDB