ESCOMP · cacraigucar · Apr 15, 2026 · Mar 3, 2026 · Mar 12, 2026 · Mar 13, 2026
diff --git a/.config_files.xml b/.config_files.xml
@@ -5,7 +5,7 @@
 <entry_id>
 
   <!-- This is the same as the default entry in
-       cime/config/cesm/config_files.xml except for the value for clm:
+       cime/config/cesm/config_files.xml except for the value for cam:
        In a standalone cam checkout, COMP_ROOT_DIR_CAM is $SRCROOT
        rather than $SRCROOT/components/cam.
        However, because of the way overrides are handled, we need to
@@ -17,9 +17,9 @@
     <default_value>unset</default_value>
     <values>
       <value component="cam"      >$SRCROOT</value>
-      <value component="dlnd"      >$CIMEROOT/src/components/data_comps/dlnd</value>
-      <value component="slnd"      >$CIMEROOT/src/components/stub_comps/slnd</value>
-      <value component="xlnd"      >$CIMEROOT/src/components/xcpl_comps/xlnd</value>
+      <value component="datm"     >$SRCROOT/components/cdeps/datm</value>
+      <value component="satm"     >$CIMEROOT/CIME/non_py/src/components/stub_comps_$COMP_INTERFACE/satm</value>
+      <value component="xatm"     >$SRCROOT/components/cmeps/med_test_comps/xatm</value>
     </values>
     <group>case_comps</group>
     <file>env_case.xml</file>

diff --git a/.gitmodules b/.gitmodules
@@ -139,7 +139,7 @@ fxDONOTUSEurl = https://github.com/ESCOMP/mizuRoute
 [submodule "ccs_config"]
 path = ccs_config
 url = https://github.com/ESMCI/ccs_config_cesm.git
-fxtag = ccs_config_cesm1.0.79
+fxtag = ccs_config_cesm1.0.81
 fxrequired = ToplevelRequired
 fxDONOTUSEurl = https://github.com/ESMCI/ccs_config_cesm.git
 

diff --git a/ccs_config b/ccs_config
diff --git a/cime_config/testdefs/testlist_cam.xml b/cime_config/testdefs/testlist_cam.xml
@@ -2498,7 +2498,7 @@
       <machine name="derecho" compiler="intel" category="aux_cam"/>
     </machines>
     <options>
-      <option name="wallclock">00:40:00</option>
+      <option name="wallclock">00:50:00</option>
       <option name="comment" >WACCM7 with MA chemistry</option>
     </options>
   </test>

diff --git a/doc/ChangeLog b/doc/ChangeLog
@@ -1,3 +1,71 @@
+
+===============================================================
+
+Tag name: cam6_4_164
+Originator(s): cacraigucar, billsacks, sjsprecious, nusbaume, jimmielin
+Date: April 15, 2026
+One-line Summary: Misc tag before CESM3 release
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1530
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+  - Fixes for snapshot output in GNU debug: https://github.com/ESCOMP/CAM/pull/1503
+  - Point to correct locations for datm, satm, and xatm: https://github.com/ESCOMP/CAM/pull/1492
+  - nvhpc test fails since update to match alphaa08l externals: https://github.com/ESCOMP/CAM/issues/1513
+  - Wrong function used in SE dycore "prim_printstate": https://github.com/ESCOMP/CAM/issues/1491
+
+Describe any changes made to build system: N/A
+
+Describe any changes made to the namelist: N/A
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: jimmielin, cacraigucar
+
+List all files eliminated: N/A
+
+List all files added and what they do: N/A
+
+List all existing files that have been modified, and describe the changes:
+M       .config_files.xml
+          - mods for datm, satm and xatm locations
+
+M       .gitmodules
+M       ccs_config
+          - update ccs_config tag to get fix for GPU test
+
+M       cime_config/testdefs/testlist_cam.xml
+          - increase time for WACCM test which ran past its time limit
+
+M       src/control/cam_snapshot_common.F90
+M       src/physics/cam/physpkg.F90
+M       src/physics/cam7/physpkg.F90
+          - fixes for snapshot output
+
+M       src/dynamics/se/dycore/prim_state_mod.F90
+          - "MINVAL" needed to be "MAXVAL" for a calculation
+
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below.  All failed tests must be justified.
+
+derecho/intel/aux_cam: all BFB
+
+derecho/nvhpc/aux_cam:
+  ERS_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_LTso.derecho_nvhpc.cam-outfrq9s_gpu_default (Overall: DIFF) details:
+    - Baseline difference expected per jimmielin
+
+izumi/nag/aux_cam:
+  ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-outfrq3s_subcol (Overall: FAIL) details:
+    FAIL ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-outfrq3s_subcol COMPARE_base_rest
+    - pre-existing failure -- see https://github.com/ESCOMP/CAM/issues/1514
+
+izumi/gnu/aux_cam: all BFB
+
+===============================================================
 ===============================================================
 
 Tag name: cam6_4_163

diff --git a/src/control/cam_snapshot_common.F90 b/src/control/cam_snapshot_common.F90
@@ -1235,7 +1235,14 @@ subroutine cam_pbuf_snapshot_all_outfld(lchnk, file_num, pbuf)
 
          ! Retrieve the pbuf data. Special handling for certain
          ! integer-type fields.
-         if( trim(pbuf_snapshot(i)%ddt_string) == 'clubbtop') then
+         ! This will allow data written out to not be mangled,
+         ! and also allow writing out snapshots with debug on in GNU compiler.
+         if( trim(pbuf_snapshot(i)%ddt_string) == 'clubbtop' .or. &
+             trim(pbuf_snapshot(i)%ddt_string) == 'ZM_JT' .or. &
+             trim(pbuf_snapshot(i)%ddt_string) == 'ZM_MAXG' .or. &
+             trim(pbuf_snapshot(i)%ddt_string) == 'ZM_IDEEP' .or. &
+             trim(pbuf_snapshot(i)%ddt_string) == 'NMXRGN' .or. &
+             trim(pbuf_snapshot(i)%ddt_string) == 'ACNUNM') then
             call pbuf_get_field(pbuf, pbuf_idx, tmpptr2d_int)
             ! copy into real
             allocate(tmpptr2d(size(tmpptr2d_int, 1), size(tmpptr2d_int, 2)))

diff --git a/src/dynamics/se/dycore/prim_state_mod.F90 b/src/dynamics/se/dycore/prim_state_mod.F90
@@ -138,7 +138,7 @@ subroutine prim_printstate(elem, tl,hybrid,nets,nete, fvm, omega_cn)
         min_local(ie,6) = MINVAL(SUM(fvm(ie)%dp_fvm(1:nc,1:nc,:),DIM=3))+hyai(1)*ps0
         max_local(ie,6) = MAXVAL(SUM(fvm(ie)%dp_fvm(1:nc,1:nc,:),DIM=3))+hyai(1)*ps0
         min_local(ie,7) = MINVAL(moist_ps_fvm(:,:,ie))
-        max_local(ie,7) = MINVAL(moist_ps_fvm(:,:,ie))
+        max_local(ie,7) = MAXVAL(moist_ps_fvm(:,:,ie))
         min_local(ie,8)  = MINVAL(elem(ie)%state%psdry(:,:))
         max_local(ie,8)  = MAXVAL(elem(ie)%state%psdry(:,:))
         min_local(ie,9)  = MINVAL(moist_ps(:,:,ie))

diff --git a/src/physics/cam/physpkg.F90 b/src/physics/cam/physpkg.F90
@@ -1536,6 +1536,12 @@ subroutine tphysac (ztodt,   cam_in,  &
     ifld = pbuf_get_index('AST')
     call pbuf_get_field(pbuf, ifld, ast, start=(/1,1,itim_old/), kount=(/pcols,pver,1/) )
 
+    ! zero out local variables that may be written to snapshot for safety.
+    fh2o(:) = 0._r8         ! used in chem_timestep_tend.
+    surfric(:) = 0._r8      ! out from vertical_diffusion_tend.
+    obklen(:) = 0._r8       ! out from vertical_diffusion_tend.
+    flx_heat(:) = 0._r8     ! first out from gw_drag_cam.
+
     !
     ! accumulate fluxes into net flux array for spectral dycores
     ! jrm Include latent heat of fusion for snow
@@ -2376,6 +2382,19 @@ subroutine tphysbc (ztodt, state,  &
 
     call t_stopf('bc_init')
 
+    ! Zero-initialize subroutine-level variables for snapshot
+    cmfmc(:,:) = 0._r8
+    cmfcme(:,:) = 0._r8
+    zdu(:,:) = 0._r8
+    rliq(:) = 0._r8
+    rice(:) = 0._r8
+    dlf(:,:) = 0._r8
+    dlf2(:,:) = 0._r8
+    rliq2(:) = 0._r8
+    det_s(:) = 0._r8
+    det_ice(:) = 0._r8
+    net_flx(:) = 0._r8
+
     !===================================================
     ! Global mean total energy fixer
     !===================================================
@@ -2533,10 +2552,6 @@ subroutine tphysbc (ztodt, state,  &
        dlf(:,:) = 0._r8
     end if
 
-    ! Zero-initialize subroutine-level variables for snapshot
-    dlf2(:,:) = 0._r8
-    rliq2(:) = 0._r8
-
     if (trim(cam_take_snapshot_before) == "convect_shallow_tend") then
        call cam_snapshot_all_outfld_tphysbc(cam_snapshot_before_num, state, tend, cam_in, cam_out, pbuf, &
            flx_heat, cmfmc, cmfcme, zdu, rliq, rice, dlf, dlf2, rliq2, det_s, det_ice, net_flx)

diff --git a/src/physics/cam7/physpkg.F90 b/src/physics/cam7/physpkg.F90
@@ -1641,6 +1641,15 @@ subroutine tphysac (ztodt,   cam_in,  &
     call pbuf_get_field(pbuf, rliqbc_idx, rliqbc)
     rliq(:ncol) = rliqbc(:ncol)
 
+    ! zero out local variables that may be written to snapshot for safety.
+    fh2o(:) = 0._r8         ! used in chem_timestep_tend.
+    surfric(:) = 0._r8      ! out from vertical_diffusion_tend.
+    obklen(:) = 0._r8       ! out from vertical_diffusion_tend.
+    flx_heat(:) = 0._r8     ! first out from gw_drag_cam.
+    det_s(:) = 0._r8        ! out from clubb_tend_cam.
+    det_ice(:) = 0._r8      ! out from clubb_tend_cam.
+    net_flx(:) = 0._r8      ! out from radiation_tend.
+
     !
     ! accumulate fluxes into net flux array for spectral dycores
     ! jrm Include latent heat of fusion for snow
@@ -2832,6 +2841,17 @@ subroutine tphysbc (ztodt, state,  &
 
     call t_stopf('bc_init')
 
+    ! Zero-initialize subroutine-level variables for snapshot
+    cmfmc(:,:) = 0._r8
+    cmfcme(:,:) = 0._r8
+    zdu(:,:) = 0._r8
+    rliq(:) = 0._r8
+    rice(:) = 0._r8
+    dlf(:,:) = 0._r8
+    dlf2(:,:) = 0._r8
+    rliq2(:) = 0._r8
+    net_flx(:) = 0._r8
+
     !===================================================
     ! Global mean total energy fixer
     !===================================================
+8 −5		machines/Depends.nvhpc
+3 −5		machines/casper/config_machines.xml
+1 −1		machines/casper/gnu_casper.cmake
+3 −1		machines/cmake_macros/nvhpc.cmake