Changeset 873 for trunk/LMDZ.GENERIC/README

Timestamp:

Feb 9, 2013, 5:48:51 PM (12 years ago)

Author:

aslmd

Message:

LMDZ.GENERIC (and LMDZ.UNIVERSAL)

• Optimized calculations for continuum (done for H2 and He, to be done for others)
  • new common bilinear interpolation routine (bilinearbig)
  • optimization: only one calculation is actually needed

to find indexes of wavelength for bilinear interpolation
... because this will not change with level and integration step!

• optimization: use while loop in bilinearbig
• completely similar results obtained (test case for a gas giant, many simulated days)

NB: those changes really improve gcm speed (factor 2.2 for whole model!)

continuum was very expensive, now very cheap
--> e.g. 1 day, 25 dyn ts, 5 phys ts
--> before: 243 seconds (including 120 seconds for continuum bilinear interpolation)
--> after: 108 seconds

• Corrected a bug: Continuum in inifis instead of continuum

... until now, most users (unbeknownst to them) were running with the continuum by default!

• Cosmetic changes in optcv (mostly spaces and line breaks)

... so that comparisons with optci are easy e.g. through vimdiff

File:

• trunk/LMDZ.GENERIC/README (modified) (1 diff)

trunk/LMDZ.GENERIC/README

@@ -878 +878 @@
 - Users can still use e.g. H2_ but H2 also works
 - Simplified condense_cloud so that igas_CO2 is used directly
+
+== 09/02/2013 == AS
+- Optimized calculations for continuum (done for H2 and He, to be done for others)
+      - new common bilinear interpolation routine (bilinearbig)
+      - optimization: only one calculation is actually needed
+                      to find indexes of wavelength for bilinear interpolation
+                      ... because this will not change with level and integration step!
+      - optimization: use while loop in bilinearbig
+      - completely similar results obtained (test case for a gas giant, many simulated days)
+  NB: those changes really improve gcm speed (factor 2.2 for whole model!)
+      continuum was very expensive, now very cheap
+      --> e.g. 1 day, 25 dyn ts, 5 phys ts
+      --> before: 243 seconds (including 120 seconds for continuum bilinear interpolation)
+      --> after: 108 seconds
+- Corrected a bug: Continuum in inifis instead of continuum
+    ... until now, most users (unbeknownst to them) were running with the continuum by default!
+- Cosmetic changes in optcv (mostly spaces and line breaks) 
+    ... so that comparisons with optci are easy e.g. through vimdiff