diff --git a/pmu/pmu.cpp b/pmu/pmu.cpp
index a1acc91a3b4321e6d22d67656cf2f39cd3f07919..ccab473dcd424de7d179f00a671e6cf3c960c5f4 100644
--- a/pmu/pmu.cpp
+++ b/pmu/pmu.cpp
@@ -33,7 +33,7 @@ using namespace pcerr;
 using namespace KUNPENG_PMU;
 using namespace std;
 
-#define MAX_CPU_NUM sysconf(_SC_NPROCESSORS_ONLN)
+#define MAX_CPU_NUM sysconf(_SC_NPROCESSORS_CONF)
 
 static unordered_map<unsigned, bool> runningStatus;
 static SafeHandler<unsigned> pdMutex;