set smp cpu affinity to all cores

src/cpu.cpp

@@ -15,6 +15,7 @@
 #include "cpu.h"
 
 #include <stdio.h>
+#include <string.h>
 #include <vector>
 
 #ifdef _OPENMP
@@ -391,7 +392,7 @@ int set_cpu_powersave(int powersave)
         sort_cpuid_by_max_frequency(sorted_cpuids, &little_cluster_offset);
     }
 
-    if (little_cluster_offset == 0)
+    if (little_cluster_offset == 0 && powersave != 0)
     {
         fprintf(stderr, "SMP cpu powersave not supported\n");
         return -1;