Fix incorrectly sized ga2la hash table

[alexxy/gromacs.git] / docs / release-notes / 2021 / 2021.3.rst

diff --git a/docs/release-notes/2021/2021.3.rst b/docs/release-notes/2021/2021.3.rst
index b324ac639d4a50257575240c243874db88c145f8..54cce599052edac3cc069901a339881ac9a0e3a3 100644 (file)
--- a/docs/release-notes/2021/2021.3.rst
+++ b/docs/release-notes/2021/2021.3.rst
@@ -32,3 +32,11 @@ The source code validation could otherwise fail a build with cryptic errors.
 Miscellaneous
 ^^^^^^^^^^^^^
 
+Removed performance loss in the mdrun domain decomposition
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+With 16 or more so-called PP MPI ranks, the domain decomposition
+repartitioning could incur large performance overheads due to a sub-optimally
+sized hash table. This has now been fixed.
+
+:issue:`4054`