diff --git a/base/tools/psb_c_glob_transpose.F90 b/base/tools/psb_c_glob_transpose.F90
index 2032b6f3..d77ab6b9 100644
--- a/base/tools/psb_c_glob_transpose.F90
+++ b/base/tools/psb_c_glob_transpose.F90
@@ -270,12 +270,12 @@ subroutine psb_lc_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
@@ -569,12 +569,12 @@ subroutine psb_c_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
diff --git a/base/tools/psb_d_glob_transpose.F90 b/base/tools/psb_d_glob_transpose.F90
index 2e6f63ea..e475a30a 100644
--- a/base/tools/psb_d_glob_transpose.F90
+++ b/base/tools/psb_d_glob_transpose.F90
@@ -270,12 +270,12 @@ subroutine psb_ld_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
@@ -423,6 +423,12 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
   character(len=5)  :: outfmt_
   integer(psb_ipk_) :: debug_level, debug_unit
   character(len=20) :: name, ch_err
+  logical, parameter :: do_timings=.true.
+  integer(psb_ipk_), save :: idx_phase1=-1, idx_a2av=-1, idx_phase2=-1, idx_phase3=-1, &
+       & idx_refine1=-1, idx_refine2=-1, idx_refine3=-1
+  integer(psb_ipk_), save :: iters=0
+  real(psb_dpk_) :: t0, t1
+  
 
   if(psb_get_errstatus() /= 0) return 
   info=psb_success_
@@ -441,6 +447,22 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
 
   if (debug_level >= psb_debug_outer_) &
        & write(debug_unit,*) me,' ',trim(name),': Start'
+  if ((do_timings).and.(idx_phase1==-1)) &
+       & idx_phase1 = psb_get_timer_idx("D_GLB_TRANS: phase1    ")
+  if ((do_timings).and.(idx_phase2==-1)) &
+       & idx_phase2 = psb_get_timer_idx("D_GLB_TRANS: phase2    ")
+  if ((do_timings).and.(idx_phase3==-1)) &
+       & idx_phase3 = psb_get_timer_idx("D_GLB_TRANS: phase3    ")
+  if ((do_timings).and.(idx_a2av==-1)) &
+       & idx_a2av = psb_get_timer_idx("D_GLB_TRANS: a2av      ")
+  if ((do_timings).and.(idx_refine1==-1)) &
+       & idx_refine1 = psb_get_timer_idx("D_GLB_TRANS: refine1   ")
+  if ((do_timings).and.(idx_refine2==-1)) &
+       & idx_refine2 = psb_get_timer_idx("D_GLB_TRANS: refine2   ")
+  if ((do_timings).and.(idx_refine3==-1)) &
+       & idx_refine3 = psb_get_timer_idx("D_GLB_TRANS: refine3   ")
+
+  if (do_timings) call psb_tic(idx_phase1)
 
   if (present(desc_c)) then
     p_desc_c => desc_c
@@ -540,6 +562,8 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
     call psb_errpush(info,name,a_err='ensure_size')
     goto 9999
   end if
+  if (do_timings) call psb_toc(idx_phase1)
+  if (do_timings) call psb_tic(idx_phase2)
 
   !
   ! Now, transpose the matrix, then split between itself
@@ -569,12 +593,12 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
@@ -582,6 +606,9 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
   nzl = acoo%get_nzeros()
   call acoo%ensure_size(nzl+iszr)
 
+  if (do_timings) call psb_toc(idx_phase2)
+  if (do_timings) call psb_tic(idx_a2av)
+  
   select case(psb_get_sp_a2av_alg())
   case(psb_sp_a2av_smpl_triad_)
     call psb_simple_triad_a2av(valsnd,iasnd,jasnd,sdsz,bsdindx,&
@@ -610,6 +637,8 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
     call psb_errpush(info,name,a_err='wrong A2AV alg selector')
     goto 9999
   end select
+  if (do_timings) call psb_toc(idx_a2av)
+  if (do_timings) call psb_tic(idx_phase3)
 
   if (info /= psb_success_) then
     info=psb_err_from_subroutine_
@@ -624,9 +653,11 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
     !
     ! Extend the appropriate descriptor; started as R but on
     ! transpose it now describes C
-    ! 
+    !
+    if (do_timings) call psb_tic(idx_refine1)    
     call desc_r%clone(desc_rx,info)
     call psb_cd_reinit(desc_rx,info)
+    if (do_timings) call psb_toc(idx_refine1)    
     !
     ! Take out non-local rows
     !      
@@ -634,8 +665,16 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
     lszr = iszr 
     call psb_coo_clean_negidx_inner(lszr,iarcv(1:iszr),jarcv(1:iszr),&
          & acoo%val(nzl+1:nzl+iszr),nzt,info)
+    if (do_timings) call psb_tic(idx_refine2)
     call desc_rx%g2lip_ins(jarcv(1:nzt),info)
+    if (do_timings) call psb_toc(idx_refine2)
+    if (do_timings) call psb_tic(idx_refine3)
+    !t0 = psb_wtime()
     call psb_cdasb(desc_rx,info)
+    !t1 = psb_wtime()
+    !iters = iters +1
+    !if (me == 0) write(0,*) 'Glob_transpose cdasb(desc_rx):',iters,(t1-t0),' ',desc_rx%get_fmt()
+    if (do_timings) call psb_toc(idx_refine3)
     acoo%ia(nzl+1:nzl+nzt) = iarcv(1:nzt)
     acoo%ja(nzl+1:nzl+nzt) = jarcv(1:nzt)
     nzl = nzl + nzt
@@ -684,6 +723,7 @@ subroutine psb_d_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
   Deallocate(brvindx,bsdindx,rvsz,sdsz,&
        & iasnd,jasnd,valsnd,&
        & iarcv,jarcv,stat=info)
+  if (do_timings) call psb_toc(idx_phase3)  
   if (debug_level >= psb_debug_outer_)&
        & write(debug_unit,*) me,' ',trim(name),': Done'
 
diff --git a/base/tools/psb_s_glob_transpose.F90 b/base/tools/psb_s_glob_transpose.F90
index 345ccc2a..2f0c594b 100644
--- a/base/tools/psb_s_glob_transpose.F90
+++ b/base/tools/psb_s_glob_transpose.F90
@@ -270,12 +270,12 @@ subroutine psb_ls_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
@@ -569,12 +569,12 @@ subroutine psb_s_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
diff --git a/base/tools/psb_z_glob_transpose.F90 b/base/tools/psb_z_glob_transpose.F90
index 7b83d7ef..d1a3b038 100644
--- a/base/tools/psb_z_glob_transpose.F90
+++ b/base/tools/psb_z_glob_transpose.F90
@@ -270,12 +270,12 @@ subroutine psb_lz_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more
@@ -569,12 +569,12 @@ subroutine psb_z_coo_glob_transpose(ain,desc_r,info,atrans,desc_c,desc_rx)
       valsnd(tsdx(proc+1)) = acoo%val(k)
     end if
   end do
+  call acoo%set_nzeros(nzd)
   !
   !  Put halo entries in global numbering
   !
   call desc_r%indxmap%l2gip(jasnd(1:iszs),info)
   call p_desc_c%indxmap%l2gip(iasnd(1:iszs),info)
-  call acoo%set_nzeros(nzd)
   ! And exchange data.
   ! Normally we'll use our SIMPLE A2AV and not MPI, because
   ! the communication pattern is sparse, so ours is more