Add new parameter IO::checkpoint_every_walltime_hours

git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/IOUtil/trunk@259 b32723a9-ab3a-4a60-88e2-2e5d99d7c17a

2 files changed, 12 insertions, 2 deletions

diff --git a/doc/documentation.tex b/doc/documentation.tex
index edb97a4..a391323 100644
--- a/doc/documentation.tex
+++ b/doc/documentation.tex
@@ -412,9 +412,14 @@ parameters. The most important ones are:
 \begin{itemize}
   \item {\tt IO::checkpoint\_every} (steerable)\\
     specifies how often to write a evolution checkpoint in terms of iteration
-    number
+    number.
+  \item {\tt IO::checkpoint\_every\_walltime\_hours} (steerable)\\
+    specifies how often to write a evolution checkpoint in terms of
+    wall time.  Checkpointing will be triggered if either of these
+    conditions is met.
   \item {\tt IO::checkpoint\_next} (steerable)\\
-    triggers a checkpoint at the end of the current iteration; This flag will be reset afterwards.
+    triggers a checkpoint at the end of the current iteration.  This
+    flag will be reset afterwards.
   \item {\tt IO::checkpoint\_ID}\\
     triggers a checkpoint of initial data
   \item {\tt IO::checkpoint\_on\_terminate} (steerable)\\
diff --git a/param.ccl b/param.ccl
index 2b931e1..443efb9 100644
--- a/param.ccl
+++ b/param.ccl
@@ -142,6 +142,11 @@ INT checkpoint_every "How often to checkpoint" STEERABLE = ALWAYS
    1:* :: "Every so many iterations"
   -1:0 :: "Disable periodic checkpointing"
 } -1
+REAL checkpoint_every_walltime_hours "How often to checkpoint" STEERABLE = ALWAYS
+{
+  (0:* :: "After so much walltime has passed"
+  -1   :: "Disable periodic walltime checkpointing"
+} -1
 BOOLEAN checkpoint_on_terminate "Checkpoint after last iteration" STEERABLE = ALWAYS
 {
 } "no"