mailRe: Relaxation dispersion profiling scripts and the relax_times change.


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Posted by Troels Emtekær Linnet on August 22, 2014 - 19:20:
Hi Edward.

As you please.

Best
Troels

2014-08-22 18:52 GMT+02:00 Edward d'Auvergne <edward@xxxxxxxxxxxxx>:
Hi Troels,

I have been looking at profiling the 'NS R1rho 2-site' model as I
would like to see what happens with the change:

Index: lib/dispersion/ns_r1rho_2site.py
===================================================================
--- lib/dispersion/ns_r1rho_2site.py    (revision 25225)
+++ lib/dispersion/ns_r1rho_2site.py    (working copy)
@@ -233,11 +233,8 @@
     Rexpo_mat = matrix_exponential(R_mat)

     # Magnetization evolution.
-    Rexpo_M0_mat = einsum('...ij, ...jk', Rexpo_mat, M0)
+    MA_mat = einsum('...ij, ...jk, ...kl', M0_T, Rexpo_mat, M0)[:, :,
:, :, :, 0, 0]

-    # Magnetization evolution, which include all dimensions.
-    MA_mat = einsum('...ij, ...jk', M0_T, Rexpo_M0_mat)[:, :, :, :, :, 0, 
0]
-
     # Insert safe checks.
     if min(MA_mat) < 0.0:
         mask_min_MA_mat = masked_less(MA_mat, 0.0)


This change appears to work and might make things faster, but the
profiling scripts no longer work due to the relax_times data structure
changes.  I don't know how we would fix this so that it continues to
run on older relax versions as well as the current version with the
relax_times structure updated.  Maybe we could create 2 relax_times
data structures, and then decide which is best based on the
Dispersion.__init__.__doc__ contents.  What do you think?  I will
probably rerun the full profiling disp_profile_all.py script before
releasing relax 3.3.0, as the timings are now out of date.

Cheers,

Edward


P. S.  I thought of this change while trying to work out why different
T_relax values cause this module to return different R1rho values!
Strange.

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