diff -up sysstat-9.0.6.1/pr_stats.c.pom sysstat-9.0.6.1/pr_stats.c

--- sysstat-9.0.6.1/pr_stats.c.pom	2009-09-12 20:59:04.000000000 +0200

+++ sysstat-9.0.6.1/pr_stats.c	2010-09-08 15:39:20.000000000 +0200

@@ -118,7 +118,32 @@ __print_funct_t print_cpu_stats(struct a

 					continue;

 				}

 			}

-			

+			float c_idle = 0;

+			/* set the idle value */

+			if (scc->cpu_user    + scc->cpu_nice   + scc->cpu_sys   +

+				scc->cpu_iowait  + scc->cpu_idle   + scc->cpu_steal +

+				scc->cpu_hardirq + scc->cpu_softirq == 

+				scp->cpu_user    + scp->cpu_nice   + scp->cpu_sys   +

+				scp->cpu_iowait  + scp->cpu_idle   + scp->cpu_steal +

+				scp->cpu_hardirq + scp->cpu_softirq) {

+

+				if (scc->cpu_user    + scc->cpu_nice   + scc->cpu_sys   +

+				scc->cpu_iowait  + scc->cpu_idle   + scc->cpu_steal +

+				scc->cpu_hardirq + scc->cpu_softirq == 0) {

+					 /* cpu is offline */

+					c_idle = 0;

+				} else {

+					 /* if the CPU is tickless  then

+					    there is no change in CPU values but the sum of values is not null */

+					c_idle = 100;

+				}

+			} else {

+				if (scc->cpu_idle < scp->cpu_idle)

+					c_idle = 0;

+				else 

+					c_idle = ll_sp_value(scp->cpu_idle,   scc->cpu_idle,   g_itv);

+			}

+

 			if (DISPLAY_CPU_DEF(a->opt_flags)) {

 				printf("    %6.2f    %6.2f    %6.2f    %6.2f    %6.2f    %6.2f\n",

 				       ll_sp_value(scp->cpu_user,   scc->cpu_user,   g_itv),

@@ -128,9 +153,7 @@ __print_funct_t print_cpu_stats(struct a

 						   g_itv),

 				       ll_sp_value(scp->cpu_iowait, scc->cpu_iowait, g_itv),

 				       ll_sp_value(scp->cpu_steal,  scc->cpu_steal,  g_itv),

-				       scc->cpu_idle < scp->cpu_idle ?

-				       0.0 :

-				       ll_sp_value(scp->cpu_idle,   scc->cpu_idle,   g_itv));

+				       c_idle);

 			}

 			else if (DISPLAY_CPU_ALL(a->opt_flags)) {

 				printf("    %6.2f    %6.2f    %6.2f    %6.2f    %6.2f    %6.2f"

@@ -144,9 +167,7 @@ __print_funct_t print_cpu_stats(struct a

 				       ll_sp_value(scp->cpu_hardirq, scc->cpu_hardirq, g_itv),

 				       ll_sp_value(scp->cpu_softirq, scc->cpu_softirq, g_itv),

 				       ll_sp_value(scp->cpu_guest,   scc->cpu_guest,   g_itv),

-				       scc->cpu_idle < scp->cpu_idle ?

-				       0.0 :

-				       ll_sp_value(scp->cpu_idle,    scc->cpu_idle,    g_itv));

+				       c_idle);

 			}

 		}

 	}