rarias/bscpkgs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

user guide: add initialization time limit

Browse Source
This commit is contained in:
Rodrigo Arias 2021-02-05 16:13:47 +01:00
parent 2ca58c46b4
commit a6b7b14d5e
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
garlic/doc/ug.ms
View File

@ -669,6 +669,30 @@ garlic/tampi+isend+oss+task+COLOR
garlic/tampi+isend+oss+task+COLOR+BTREE
.CE
.\" ===================================================================
.NH 2
Initialization time
.LP
It is common for programs to have an initialization phase prior to the
execution of the main computation task which is the objective of the study.
The initialization phase is usually not considered when taking
measurements, but the time it takes to complete can limit seriously the
amount of information that can be extracted from the computation phase.
As an example, if the computation phase is in the order of seconds, but
the initialization phase takes several minutes, the number of runs would
need to be set low, as the units could exceed the time limits. Also, the
experimenter may be reluctant to modify the experiments to test other
parameters, as the waiting time for the results is unavoidably large.
.PP
To prevent this problem the programs must reduce the time of the
initialization phase to be no larger than the computation time. To do
so, the initialization phase can be optimized either with
parallelization, or it can be modified to store the result of the
initialization to the disk to be later at the computation phase. In the
garlic framework an experiment can have a dependency over the results of
another experiment (the results of the initialization). The
initialization results will be cached if the derivation is kept
invariant, when modifying the computation phase parameters.
.\" ===================================================================
.bp
.NH 1
Experimentation