Hi all,
Per the ongoing discussion of slowness in GENIE spline generation I ran some test samples with trunk (as of 2016-07-18) and R-2_10_6 -- both using the same underlying support code, e.g. ROOT, GSL....
I used my DAG generating script which runs in stages:
1) generate { nu nu-bar } x { e mu tau } x { free-n free-p } = 12 jobs
2) combine those
3) generated all 6 nu flavors on a single (A,Z) isotope = 106 jobs
For these tests I generated only sub-sets of the EventGeneratorList: RES DIS QE CCMEC
and for 100 knots up to 400 GeV.
Here's a link to my evernote with numbers:
major standouts (# = sum of wall clock time in seconds):
RES stage 1 (trunk) 237134 / (r2106) 341309 = 0.7 e.g. faster
DIS stage 1 (trunk) 687672 / (r2106) 209392 = 3.28 e.g. slower
QE stage 3 (trunk) 51753 / (r2106) 107353 = 0.48 e.g. faster
CCMEC stage 3 (trunk) 101307 / (r2106) 86677 = 1.17 e.g. slower
This seems to implicate DIS generation as the big problem. I don't remember any big changes to that code per se. Does trunk switch away from using LHAPDF for the parton distributions? Perhaps that's a performance issue?
-robert
Computational Physics Developer
Scientific Computing Division
Fermi National Accelerator Laboratory
PO Box 500, MS 234, Batavia, IL 60510, USA