[cig-commits] r21447 - seismo/2D/SPECFEM2D/trunk
dkomati1 at geodynamics.org
dkomati1 at geodynamics.org
Tue Mar 5 02:54:16 PST 2013
Author: dkomati1
Date: 2013-03-05 02:54:16 -0800 (Tue, 05 Mar 2013)
New Revision: 21447
Modified:
seismo/2D/SPECFEM2D/trunk/flags.guess
Log:
better flags.guess
Modified: seismo/2D/SPECFEM2D/trunk/flags.guess
===================================================================
--- seismo/2D/SPECFEM2D/trunk/flags.guess 2013-03-04 16:56:34 UTC (rev 21446)
+++ seismo/2D/SPECFEM2D/trunk/flags.guess 2013-03-05 10:54:16 UTC (rev 21447)
@@ -37,8 +37,12 @@
# Intel ifort Fortran90 for Linux
# check: http://software.intel.com/sites/products/documentation/hpc/compilerpro/en-us/fortran/lin/compiler_f/index.htm
#
+# option "-assume buffered_io" is important especially on
+# parallel file systems like SFS 3.2 / Lustre 1.8. If omitted
+# I/O throughput lingers at 2.5 MB/s, with it it can increase to ~44 MB/s
+# However it does not make much of a difference on NFS mounted volumes or with SFS 3.1.1 / Lustre 1.6.7.1
if test x"$FLAGS_CHECK" = x; then
- FLAGS_CHECK="-O3 -xHost -ftz -assume byterecl -align sequence -vec-report0 -std03 -implicitnone -warn truncated_source -warn argument_checking -warn unused -warn declarations -warn alignments -warn ignore_loc -warn usage -check nobounds" # -mcmodel=medium -shared-intel
+ FLAGS_CHECK="-O3 -xHost -ftz -assume buffered_io -assume byterecl -align sequence -vec-report0 -std03 -implicitnone -warn truncated_source -warn argument_checking -warn unused -warn declarations -warn alignments -warn ignore_loc -warn usage -check nobounds" # -mcmodel=medium -shared-intel
fi
# useful for debugging...
# for debugging: change -O3 -check nobounds to -check all -debug -g -O0 -fp-stack-check -traceback -ftrapuv
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