Public bug reported:

== Comment: #0 - Shriya R. Kulkarni <[email protected]> - 2016-02-22 05:42:44 
==
System info :
=======

Baremetal : powerkvm5

OS : Ubuntu 16.04

uname -a : Linux powerkvm5 4.4.0-6-generic #21-Ubuntu SMP Tue Feb 16
20:31:37 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux

Steps to reproduce :
===========

1. Download -> http://gnumirror.nkn.in/gsl/gsl-2.1.tar.gz
2. ./configure
3. make, make check.

Problem :
=====

GSL multifit test are failing.

multifit :
=====

root@powerkvm5:~/srk/gsl-2.1/multifit# cat test-suite.log 
======================================
   gsl 2.1: multifit/test-suite.log
======================================

# TOTAL: 1
# PASS:  0
# SKIP:  0
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: test


FAIL: lmsder/scale=1/wnlin_internal_weights i=0 (5.17378552260920532 observed 
vs 5.17378551196259195 expected) [190002]
FAIL: lmsder/scale=1/wnlin_internal_weights i=1 (0.111041758468549051 observed 
vs 0.111041758006851149 expected) [190003]
FAIL: lmsder/scale=1/wnlin_internal_weights i=2 (1.05282724317185261 observed 
vs 1.05282724070446099 expected) [190004]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=0 (5.17378552260920532 
observed vs 5.17378551196259195 expected) [190007]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=1 (0.111041758468549051 
observed vs 0.111041758006851149 expected) [190008]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=2 (1.05282724317185261 
observed vs 1.05282724070446099 expected) [190009]
FAIL: ridge/lmsder/wnlin_internal_weights i=0 (5.17378552260920532 observed vs 
5.17378551196259195 expected) [190022]
FAIL: ridge/lmsder/wnlin_internal_weights i=1 (0.111041758468549051 observed vs 
0.111041758006851149 expected) [190023]
FAIL: ridge/lmsder/wnlin_internal_weights i=2 (1.05282724317185261 observed vs 
1.05282724070446099 expected) [190024]
FAIL: lmsder/scale=1/wnlin_external_weights i=0 (5.17378552260920532 observed 
vs 5.17378551196259195 expected) [190042]
FAIL: lmsder/scale=1/wnlin_external_weights i=1 (0.111041758468549051 observed 
vs 0.111041758006851149 expected) [190043]
FAIL: lmsder/scale=1/wnlin_external_weights i=2 (1.05282724317185261 observed 
vs 1.05282724070446099 expected) [190044]
FAIL: ridge/lmsder/wnlin_external_weights i=0 (5.17378552260920532 observed vs 
5.17378551196259195 expected) [190052]
FAIL: ridge/lmsder/wnlin_external_weights i=1 (0.111041758468549051 observed vs 
0.111041758006851149 expected) [190053]
FAIL: ridge/lmsder/wnlin_external_weights i=2 (1.05282724317185261 observed vs 
1.05282724070446099 expected) [190054]


Analysis :


In multifit/test_wnlin.c file, by changing parameter :
static double wnlin_epsrel = 1.0e-9; -> static double wnlin_epsrel = 1.0e-9*10;
we can resolve this issue, hence Ubuntu needs to incorporate the changes.

Ref : https://lists.gnu.org/archive/html/bug-gsl/2016-01/msg00002.html
------------------------------------------------------------------------------------

** Affects: ubuntu
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-137606 severity-high 
targetmilestone-inin1604

** Tags added: architecture-ppc64le bugnameltc-137606 severity-high
targetmilestone-inin1604

** Changed in: ubuntu
     Assignee: (unassigned) => Taco Screen team (taco-screen-team)

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https://bugs.launchpad.net/bugs/1560423

Title:
  GSL multifit test fail on Ubuntu 16.04

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