diff --git a/trunk/bootrom/build/tests/thread/ARM11/main.c b/trunk/bootrom/build/tests/thread/ARM11/main.c
index eedb896..01f07c4 100644
--- a/trunk/bootrom/build/tests/thread/ARM11/main.c
+++ b/trunk/bootrom/build/tests/thread/ARM11/main.c
@@ -26,13 +26,13 @@ void BromMain( void )
     osInitThread();
     while (1)
     {
-        OSTick tick = osGetTick();
         u32 mon = osGetPerfMonitor(OS_MONITOR_1);
+        OSTick tick = osGetTick();
         osSleep(1000);
-        mon = osGetPerfMonitor(OS_MONITOR_1) - mon;
         tick = osGetTick() - tick;
-        osTPrintf( "sleep mon  = %llu msec\n", OS_TICK_TO_MSEC(mon) ); // MG20ではパフォーマンスモニタのクロックが違う
+        mon = osGetPerfMonitor(OS_MONITOR_1) - mon;
         osTPrintf( "sleep tick = %llu msec\n", OS_TICK_TO_MSEC(tick) );
+        osTPrintf( "sleep mon  = %llu msec\n", OS_PMON_TO_MSEC(mon) );
     }
 }
 
diff --git a/trunk/bootrom/include/brom/os/common/tick.h b/trunk/bootrom/include/brom/os/common/tick.h
index 9ac505d..5a279ce 100644
--- a/trunk/bootrom/include/brom/os/common/tick.h
+++ b/trunk/bootrom/include/brom/os/common/tick.h
@@ -87,15 +87,6 @@ extern  void i_osSetTick( u64 );
 #endif // SDK_ARM9
 
 //---- sec to tick
-#define  OS_SEC_TO_TICK(    sec )   OSi_SEC_TO_TICK(   sec, OS_TICK_PRESCALE )
-#define  OS_SEC_TO_TICK32(  sec )   OSi_SEC_TO_TICK32( sec, OS_TICK_PRESCALE )
-
-#define  OS_MSEC_TO_TICK(   msec )  OSi_MSEC_TO_TICK(   msec, OS_TICK_PRESCALE )
-#define  OS_MSEC_TO_TICK32( msec )  OSi_MSEC_TO_TICK32( msec, OS_TICK_PRESCALE )
-
-#define  OS_USEC_TO_TICK(   usec )  OSi_USEC_TO_TICK(   usec, OS_TICK_PRESCALE )
-#define  OS_USEC_TO_TICK32( usec )  OSi_USEC_TO_TICK32( usec, OS_TICK_PRESCALE )
-
 #define  OSi_SEC_TO_TICK(    sec, prescale )   ((OSTick)(   (OS_TICK_CLOCK * (u64)(sec)) / (prescale) ))
 #define  OSi_SEC_TO_TICK32(  sec, prescale )   ((OSTick32)( (OS_TICK_CLOCK * (u32)(sec)) / (prescale) ))
 
@@ -105,16 +96,16 @@ extern  void i_osSetTick( u64 );
 #define  OSi_USEC_TO_TICK(   usec, prescale )  ((OSTick)(   ((OS_TICK_CLOCK/1000) * (u64)(usec)) / ((prescale) * 1000) ))
 #define  OSi_USEC_TO_TICK32( usec, prescale )  ((OSTick32)( ((OS_TICK_CLOCK/1000) * (u32)(usec)) / ((prescale) * 1000) ))
 
+#define  OS_SEC_TO_TICK(    sec )   OSi_SEC_TO_TICK(   sec, OS_TICK_PRESCALE )
+#define  OS_SEC_TO_TICK32(  sec )   OSi_SEC_TO_TICK32( sec, OS_TICK_PRESCALE )
+
+#define  OS_MSEC_TO_TICK(   msec )  OSi_MSEC_TO_TICK(   msec, OS_TICK_PRESCALE )
+#define  OS_MSEC_TO_TICK32( msec )  OSi_MSEC_TO_TICK32( msec, OS_TICK_PRESCALE )
+
+#define  OS_USEC_TO_TICK(   usec )  OSi_USEC_TO_TICK(   usec, OS_TICK_PRESCALE )
+#define  OS_USEC_TO_TICK32( usec )  OSi_USEC_TO_TICK32( usec, OS_TICK_PRESCALE )
+
 //---- tick to sec
-#define  OS_TICK_TO_SEC(    tick )  OSi_TICK_TO_SEC(   tick, OS_TICK_PRESCALE )
-#define  OS_TICK_TO_SEC32(  tick )  OSi_TICK_TO_SEC32( tick, OS_TICK_PRESCALE )
-
-#define  OS_TICK_TO_MSEC(   tick )  OSi_TICK_TO_MSEC(   tick, OS_TICK_PRESCALE )
-#define  OS_TICK_TO_MSEC32( tick )  OSi_TICK_TO_MSEC32( tick, OS_TICK_PRESCALE )
-
-#define  OS_TICK_TO_USEC(   tick )  OSi_TICK_TO_USEC(   tick, OS_TICK_PRESCALE )
-#define  OS_TICK_TO_USEC32( tick )  OSi_TICK_TO_USEC32( tick, OS_TICK_PRESCALE )
-
 #define  OSi_TICK_TO_SEC(    tick, prescale )  ( ((u64)(tick) * (prescale)) / OS_TICK_CLOCK )
 #define  OSi_TICK_TO_SEC32(  tick, prescale )  ( ((u32)(tick) * (prescale)) / OS_TICK_CLOCK )
 
@@ -124,6 +115,25 @@ extern  void i_osSetTick( u64 );
 #define  OSi_TICK_TO_USEC(   tick, prescale )  ( ((u64)(tick) * (prescale) * 1000) / (OS_TICK_CLOCK/1000) )
 #define  OSi_TICK_TO_USEC32( tick, prescale )  ( ((u32)(tick) * (prescale) * 1000) / (OS_TICK_CLOCK/1000) )
 
+#define  OS_TICK_TO_SEC(    tick )  OSi_TICK_TO_SEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_SEC32(  tick )  OSi_TICK_TO_SEC32( tick, OS_TICK_PRESCALE )
+
+#define  OS_TICK_TO_MSEC(   tick )  OSi_TICK_TO_MSEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_MSEC32( tick )  OSi_TICK_TO_MSEC32( tick, OS_TICK_PRESCALE )
+
+#define  OS_TICK_TO_USEC(   tick )  OSi_TICK_TO_USEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_USEC32( tick )  OSi_TICK_TO_USEC32( tick, OS_TICK_PRESCALE )
+
+//---- sec to performance monitor
+#define  OS_SEC_TO_PMON(  sec )   ( (u32)OSi_SEC_TO_TICK( sec, OS_TICK_PRESCALE*2 ) )
+#define  OS_MSEC_TO_PMON( msec )  ( (u32)OSi_MSEC_TO_TICK( msec, OS_TICK_PRESCALE*2 ) )
+#define  OS_USEC_TO_PMON( usec )  ( (u32)OSi_USEC_TO_TICK( usec, OS_TICK_PRESCALE*2 ) )
+
+//---- performance monitor to sec
+#define  OS_PMON_TO_SEC(  pmon )  OSi_TICK_TO_SEC( pmon, OS_TICK_PRESCALE/2 )
+#define  OS_PMON_TO_MSEC( pmon )  OSi_TICK_TO_MSEC( pmon, OS_TICK_PRESCALE/2 )
+#define  OS_PMON_TO_USEC( pmon )  OSi_TICK_TO_USEC( pmon, OS_TICK_PRESCALE/2 )
+
 
 #ifdef __cplusplus
 } /* extern "C" */