diff --git a/src/io.F90 b/src/io.F90
index 1381bb2..2a013b2 100644
--- a/src/io.F90
+++ b/src/io.F90
@@ -33,9 +33,7 @@ module io
 ! import external subroutines
 !
   use blocks, only : pointer_meta
-#ifdef PROFILE
   use timers, only : set_timer, start_timer, stop_timer
-#endif /* PROFILE */
 
 ! module variables are not implicit by default
 !
@@ -89,9 +87,10 @@ module io
 #endif /* HDF5 */
   end interface
 
-#ifdef PROFILE
 ! timer indices
 !
+  integer            , save :: iio
+#ifdef PROFILE
   integer            , save :: ioi, iow, ios
 #endif /* PROFILE */
 
@@ -204,9 +203,10 @@ module io
 !
 !-------------------------------------------------------------------------------
 !
-#ifdef PROFILE
 ! set timer descriptions
 !
+    call set_timer('SNAPSHOTS I/O'        , iio)
+#ifdef PROFILE
     call set_timer('io:: initialization'  , ioi)
     call set_timer('io:: snapshot writing', iow)
     call set_timer('io:: snapshot reading', ios)
@@ -360,12 +360,20 @@ module io
     call start_timer(ios)
 #endif /* PROFILE */
 
+! start accounting time for I/O
+!
+    call start_timer(iio)
+
 #ifdef HDF5
 ! read HDF5 restart file and rebuild the meta and data block structures
 !
     call read_restart_snapshot_h5(iret)
 #endif /* HDF5 */
 
+! stop accounting time for I/O
+!
+    call stop_timer(iio)
+
 ! calculate the shift of the snapshot counter, and the next snapshot time
 !
     ishift = int(time / hsnap) - isnap + 1
@@ -421,12 +429,20 @@ module io
     call start_timer(iow)
 #endif /* PROFILE */
 
+! start accounting time for I/O
+!
+    call start_timer(iio)
+
 #ifdef HDF5
 ! store restart file
 !
     call write_restart_snapshot_h5(nrun, iret)
 #endif /* HDF5 */
 
+! stop accounting time for I/O
+!
+    call stop_timer(iio)
+
 ! increase the restart snapshot counter
 !
     irest = irest + 1
@@ -476,6 +492,10 @@ module io
     call start_timer(iow)
 #endif /* PROFILE */
 
+! start accounting time for I/O
+!
+    call start_timer(iio)
+
 #ifdef HDF5
 ! store variable snapshot file
 !
@@ -486,6 +506,10 @@ module io
     end if
 #endif /* HDF5 */
 
+! stop accounting time for I/O
+!
+    call stop_timer(iio)
+
 ! increase the snapshot counter and calculate the next snapshot time
 !
     isnap = isnap + 1