Updated benchmark_slurm.sh script for Harvard/Cannon

gcpy/benchmark/benchmark_slurm.sh
- Added sapphire and huce_cascade to the partition list
- Changed requested time to 6 hours
- Added helpful tips in the comments section

CHANGELOG.md
- Updated accordingly

Signed-off-by: Bob Yantosca <yantosca@seas.harvard.edu>

Author: yantosca

CHANGELOG.md

@@ -19,7 +19,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Added functions `get_molwt_from_metadata` and `read_species_metadata` to `gcpy/util.py`
 - Added function `get_species_database_files` to `gcpy/benchmark/modules/benchmark_utils.py`
 - Added constant `SPECIES_DATABASE` to `gcpy/benchmark/modules/benchmark_utils.py`
-- Added manual garbage collection in `create_regridders`, `compare_single_level`, and compare_zonal_mean` functions.
+- Added manual garbage collection in `create_regridders`, `compare_single_level`, and `compare_zonal_mean` functions.
+- Added helpful tips to the `gcpy/benchmark/benchmark.slurm.sh` script
 
 ### Changed
 - Modified criteria for terminating read of log files in `benchmark_scrape_gcclassic_timers.py` to avoid being spoofed by  output that is attached by Intel VTune

gcpy/benchmark/benchmark_slurm.sh

@@ -2,9 +2,9 @@
 
 #SBATCH -c 8
 #SBATCH -N 1
-#SBATCH -t 0-4:00
-#SBATCH -p seas_compute,shared
-#SBATCH --mem=100000
+#SBATCH -t 0-6:00
+#SBATCH -p sapphire,huce_cascade,seas_compute,shared
+#SBATCH --mem=180000
 #SBATCH --mail-type=END
 
 #============================================================================
@@ -13,7 +13,17 @@
 #
 # You can modify the SLURM parameters above for your setup.
 #
-# Tip: Using less cores can reduce the amount of memory required.
+# Tips:
+# -----
+# (1) Use fewer cores to reduce the memory footprint. This may prevent
+#     your job from running out of memory.  Python under Linux seems
+#     to have an issue where not all memory is released back to the OS.
+#
+# (2) We recommend that you generate only one benchmark comparison
+#     (GCC vs GCC, GCHP vs GCC, GCHP vs GCC, or diff of diffs)
+#     at a time.  Otherwise your job will probaly run out of memory.
+#
+# (3) For diff-of-diffs plots, we recommend using 6 cores.
 #============================================================================
 
 # Apply all bash initialization settings