diff --git a/xCAT-server/lib/perl/xCAT/PPC.pm b/xCAT-server/lib/perl/xCAT/PPC.pm
index b0e1cd128..11700310d 100644
--- a/xCAT-server/lib/perl/xCAT/PPC.pm
+++ b/xCAT-server/lib/perl/xCAT/PPC.pm
@@ -452,7 +452,7 @@ sub process_command {
                     #print Dumper($one_d);
                     if($$one_d[4]  =~ /^fsp$/ ||  $$one_d[4] =~ /^cec$/) {
                         if( $request->{syspowerinterval} > 0) {
-			    Time::HiRes::sleep($request->{syspowerinterval});
+                            no_interrupt_sleep($request->{syspowerinterval});
                         }
                     }
                 }
@@ -575,6 +575,16 @@ ENDOFFORK:
     return(0);
 }
 
+sub no_interrupt_sleep {
+    my $sleep_time = shift;
+    my $sleep_end = time + $sleep_time;
+    while (1) {
+        my $sleep_duration = $sleep_end - time;
+        last if $sleep_duration <= 0;
+        Time::HiRes::sleep($sleep_duration);
+    }
+}
+
 sub kill_children_by_pid {
     my $pid = shift;
     my @pids = `ps -o pid,ppid -e`;
@@ -1347,7 +1357,7 @@ sub handle_find_hw_children {
     if (!defined($mtms))  {
         return undef;
     }
-    my @nodearray = $vpdtab->getAttribs({serial=>$mtms->{serial}, mtm=>$mtms->{mtm}}, qw(node side));
+    my @nodearray = $vpdtab->getAttribs({serial=>$mtms->{serial}, mtm=>$mtms->{mtm}}, qw(node side)); # need regx
     if (!defined(@nodearray)) {
         return undef;
     }