lapack test failures on sandybridge #125

nolta · 2012-07-12T22:12:11Z

Is this normal?

System details: ubuntu 10.04, gcc 4.7.1, core i7-3820

---------------- Testing LAPACK Routines ----------------

-- Detailed results are stored in testing_results.txt

------------------------- REAL              ------------------------

-->  Testing REAL              Nonsymmetric Eigenvalue Problem [ snep.out ]
 SHS:    2 out of  1764 tests failed to pass the threshold
 SHS:    3 out of  1764 tests failed to pass the threshold
 SHS:    3 out of  1764 tests failed to pass the threshold
-->  Tests passed: 3528
-->  Tests failing to pass the threshold: 8

-->  Testing REAL              Symmetric Eigenvalue Problem [ ssep.out ]
-->  Tests passed: 89520

-->  Testing REAL              Singular Value Decomposition [ ssvd.out ]
-->  Tests passed: 69350

-->  Testing REAL              Eigen Condition [ sec.out ]
-->  Tests passed: 501251

-->  Testing REAL              Nonsymmetric Eigenvalue [ sed.out ]
-->  Tests passed: 12982

-->  Testing REAL              Nonsymmetric Generalized Eigenvalue Problem [ sgg.out ]
-->  Tests passed: 13832

-->  Testing REAL              Nonsymmetric Generalized Eigenvalue Problem driver [ sgd.out ]
-->  Tests passed: 7830

-->  Testing REAL              Symmetric Eigenvalue Problem [ ssb.out ]
-->  Tests passed: 540

-->  Testing REAL              Symmetric Eigenvalue Generalized Problem [ ssg.out ]
-->  Tests passed: 30870

-->  Testing REAL              Banded Singular Value Decomposition routines [ sbb.out ]
-->  Tests passed: 6000

-->  Testing REAL              Generalized Linear Regression Model routines [ sglm.out ]
-->  Tests passed: 48

-->  Testing REAL              Generalized QR and RQ factorization routines [ sgqr.out ]
-->  Tests passed: 1728

-->  Testing REAL              Generalized Singular Value Decomposition routines [ sgsv.out ]
-->  Tests passed: 384

-->  Testing REAL              CS Decomposition routines [ scsd.out ]
-->  Tests passed: 270

-->  Testing REAL              Constrained Linear Least Squares routines [ slse.out ]
-->  Tests passed: 96

-->  Testing REAL              Linear Equation routines [ stest.out ]
 SGE:    219 out of   3653 tests failed to pass the threshold
 SGE drivers:    336 out of   4884 tests failed to pass the threshold
-->  Tests passed: 312011
-->  Tests failing to pass the threshold: 555

-->  Testing REAL              RFP linear equation routines [ stest_rfp.out ]
-->  Tests passed: 13176


------------------------- DOUBLE PRECISION ------------------------

-->  Testing DOUBLE PRECISION Nonsymmetric Eigenvalue Problem [ dnep.out ]
-->  Tests passed: 8820

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Problem [ dsep.out ]
-->  Tests passed: 89520

-->  Testing DOUBLE PRECISION Singular Value Decomposition [ dsvd.out ]
-->  Tests passed: 69350

-->  Testing DOUBLE PRECISION Eigen Condition [ dec.out ]
-->  Tests passed: 501251

-->  Testing DOUBLE PRECISION Nonsymmetric Eigenvalue [ ded.out ]
-->  Tests passed: 12982

-->  Testing DOUBLE PRECISION Nonsymmetric Generalized Eigenvalue Problem [ dgg.out ]
-->  Tests passed: 13832

-->  Testing DOUBLE PRECISION Nonsymmetric Generalized Eigenvalue Problem driver [ dgd.out ]
-->  Tests passed: 7830

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Problem [ dsb.out ]
-->  Tests passed: 540

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Generalized Problem [ dsg.out ]
-->  Tests passed: 30870

-->  Testing DOUBLE PRECISION Banded Singular Value Decomposition routines [ dbb.out ]
-->  Tests passed: 6000

-->  Testing DOUBLE PRECISION Generalized Linear Regression Model routines [ dglm.out ]
-->  Tests passed: 48

-->  Testing DOUBLE PRECISION Generalized QR and RQ factorization routines [ dgqr.out ]
-->  Tests passed: 1728

-->  Testing DOUBLE PRECISION Generalized Singular Value Decomposition routines [ dgsv.out ]
-->  Tests passed: 384

-->  Testing DOUBLE PRECISION CS Decomposition routines [ dcsd.out ]
-->  Tests passed: 270

-->  Testing DOUBLE PRECISION Constrained Linear Least Squares routines [ dlse.out ]
-->  Tests passed: 96

-->  Testing DOUBLE PRECISION Linear Equation routines [ dtest.out ]
 DGE:    496 out of   3653 tests failed to pass the threshold
 DGE drivers:    700 out of   4896 tests failed to pass the threshold
-->  Tests passed: 312011
-->  Tests failing to pass the threshold: 1196

-->  Testing DOUBLE PRECISION Mixed Precision linear equation routines [ dstest.out ]
 DSGESV:    130 out of    324 tests failed to pass the threshold
-->  Tests passed: 488
-->  Tests failing to pass the threshold: 130

-->  Testing DOUBLE PRECISION RFP linear equation routines [ dtest_rfp.out ]
-->  Tests passed: 13176


------------------------- COMPLEX           ------------------------

-->  Testing COMPLEX           Nonsymmetric Eigenvalue Problem [ cnep.out ]
 CHS:    1 out of  1764 tests failed to pass the threshold
 CHS:    2 out of  1764 tests failed to pass the threshold
 CHS:    2 out of  1764 tests failed to pass the threshold
-->  Tests passed: 3528
-->  Tests failing to pass the threshold: 5

-->  Testing COMPLEX           Symmetric Eigenvalue Problem [ csep.out ]
-->  Tests passed: 77280

-->  Testing COMPLEX           Singular Value Decomposition [ csvd.out ]
-->  Tests passed: 44625

-->  Testing COMPLEX           Eigen Condition [ cec.out ]
-->  Tests passed: 5966

-->  Testing COMPLEX           Nonsymmetric Eigenvalue [ ced.out ]
-->  Tests passed: 12778

-->  Testing COMPLEX           Nonsymmetric Generalized Eigenvalue Problem [ cgg.out ]
-->  Tests passed: 13832

-->  Testing COMPLEX           Nonsymmetric Generalized Eigenvalue Problem driver [ cgd.out ]
-->  Tests passed: 7830

-->  Testing COMPLEX           Symmetric Eigenvalue Problem [ csb.out ]
-->  Tests passed: 540

-->  Testing COMPLEX           Symmetric Eigenvalue Generalized Problem [ csg.out ]
-->  Tests passed: 30870

-->  Testing COMPLEX           Banded Singular Value Decomposition routines [ cbb.out ]
-->  Tests passed: 6000

-->  Testing COMPLEX           Generalized Linear Regression Model routines [ cglm.out ]
-->  Tests passed: 48

-->  Testing COMPLEX           Generalized QR and RQ factorization routines [ cgqr.out ]
-->  Tests passed: 1728

-->  Testing COMPLEX           Generalized Singular Value Decomposition routines [ cgsv.out ]
-->  Tests passed: 384

-->  Testing COMPLEX           CS Decomposition routines [ ccsd.out ]
-->  Tests passed: 270

-->  Testing COMPLEX           Constrained Linear Least Squares routines [ clse.out ]
-->  Tests passed: 96

-->  Testing COMPLEX           Linear Equation routines [ ctest.out ]
 CGE:    491 out of   3653 tests failed to pass the threshold
 CGE drivers:    687 out of   4896 tests failed to pass the threshold
-->  Tests passed: 290052
-->  Tests failing to pass the threshold: 1178

-->  Testing COMPLEX           RFP linear equation routines [ ctest_rfp.out ]
  CTFSM auxiliary routine:     1 out of  7776 tests failed to pass the threshold
-->  Tests passed: 5400
-->  Tests failing to pass the threshold: 1


------------------------- COMPLEX16          ------------------------

-->  Testing COMPLEX16          Nonsymmetric Eigenvalue Problem [ znep.out ]
-->  Tests passed: 8820

-->  Testing COMPLEX16          Symmetric Eigenvalue Problem [ zsep.out ]
-->  Tests passed: 77280

-->  Testing COMPLEX16          Singular Value Decomposition [ zsvd.out ]
-->  Tests passed: 44625

-->  Testing COMPLEX16          Eigen Condition [ zec.out ]
-->  Tests passed: 5966

-->  Testing COMPLEX16          Nonsymmetric Eigenvalue [ zed.out ]
-->  Tests passed: 12778

-->  Testing COMPLEX16          Nonsymmetric Generalized Eigenvalue Problem [ zgg.out ]
-->  Tests passed: 13832

-->  Testing COMPLEX16          Nonsymmetric Generalized Eigenvalue Problem driver [ zgd.out ]
-->  Tests passed: 7830

-->  Testing COMPLEX16          Symmetric Eigenvalue Problem [ zsb.out ]
-->  Tests passed: 540

-->  Testing COMPLEX16          Symmetric Eigenvalue Generalized Problem [ zsg.out ]
-->  Tests passed: 30870

-->  Testing COMPLEX16          Banded Singular Value Decomposition routines [ zbb.out ]
-->  Tests passed: 6000

-->  Testing COMPLEX16          Generalized Linear Regression Model routines [ zglm.out ]
-->  Tests passed: 48

-->  Testing COMPLEX16          Generalized QR and RQ factorization routines [ zgqr.out ]
-->  Tests passed: 1728

-->  Testing COMPLEX16          Generalized Singular Value Decomposition routines [ zgsv.out ]
-->  Tests passed: 384

-->  Testing COMPLEX16          CS Decomposition routines [ zcsd.out ]
-->  Tests passed: 270

-->  Testing COMPLEX16          Constrained Linear Least Squares routines [ zlse.out ]
-->  Tests passed: 96

-->  Testing COMPLEX16          Linear Equation routines [ ztest.out ]
 ZGE:    495 out of   3653 tests failed to pass the threshold
 ZGE drivers:    693 out of   4896 tests failed to pass the threshold
-->  Tests passed: 318836
-->  Tests failing to pass the threshold: 1188

-->  Testing COMPLEX16          Mixed Precision linear equation routines [ zctest.out ]
 ZCGESV:    144 out of    324 tests failed to pass the threshold
-->  Tests passed: 488
-->  Tests failing to pass the threshold: 144

-->  Testing COMPLEX16          RFP linear equation routines [ ztest_rfp.out ]
-->  Tests passed: 13176


            -->   LAPACK TESTING SUMMARY  <--
        Processing LAPACK Testing output found in the TESTING direcory
SUMMARY                 nb test run     numerical error     other error  
================    =========== =================   ================  
REAL                1063416     563 (0.053%)    0   (0.000%)    
DOUBLE PRECISION    1069196     1326    (0.124%)    0   (0.000%)    
COMPLEX             501227      1184    (0.236%)    0   (0.000%)    
COMPLEX16           543567      1332    (0.245%)    0   (0.000%)    

--> ALL PRECISIONS  3177406     4405    (0.139%)    0   (0.000%)

The text was updated successfully, but these errors were encountered:

xianyi · 2012-07-13T02:04:02Z

Hi ,

I'm not an expert about LAPACK. According to this thread http://icl.cs.utk.edu/lapack-forum/viewtopic.php?f=2&t=3213, the test always has some numerical errors.
However, I am not sure your error is normal.

Could you test OpenBLAS with NEHALEM target?

Thanks

Xianyi

nolta · 2012-07-13T02:42:21Z

With TARGET=NEHALEM, i only get 2 failures (vs 4405)

            -->   LAPACK TESTING SUMMARY  <--
        Processing LAPACK Testing output found in the TESTING direcory
SUMMARY                 nb test run     numerical error     other error  
================    =========== =================   ================  
REAL                1077227     0   (0.000%)    0   (0.000%)    
DOUBLE PRECISION    1076275     1   (0.000%)    0   (0.000%)    
COMPLEX             515038      1   (0.000%)    0   (0.000%)    
COMPLEX16           552410      0   (0.000%)    0   (0.000%)    

--> ALL PRECISIONS  3220950     2   (0.000%)    0   (0.000%)

xianyi · 2012-07-13T02:49:55Z

Hi @nolta ,

Thank you for the report.
Do you use single thread or multi-threading ?

Thanks

Xianyi

nolta · 2012-07-13T02:55:31Z

USE_THREAD=1

nolta · 2012-07-13T03:33:37Z

If i set USE_THREAD=0, the number of failures falls, but only by 45%

            -->   LAPACK TESTING SUMMARY  <--
        Processing LAPACK Testing output found in the TESTING direcory
SUMMARY                 nb test run     numerical error     other error  
================    =========== =================   ================  
REAL                1049952     553 (0.053%)    0   (0.000%)    
DOUBLE PRECISION    1069196     669 (0.063%)    0   (0.000%)    
COMPLEX             501227      561 (0.112%)    0   (0.000%)    
COMPLEX16           543567      657 (0.121%)    0   (0.000%)    

--> ALL PRECISIONS  3163942     2440    (0.077%)    0   (0.000%)

xianyi · 2012-07-13T03:36:04Z

Hi ,

Could you provide the full output with USE_THREAD=0 on gist?

We will investigate this issue.

Thanks

Xianyi

nolta · 2012-07-13T04:05:22Z

https://gist.github.com/3102655

ViralBShah · 2012-07-14T19:42:00Z

How do I run the LAPACK tests?

nolta · 2012-07-14T19:45:42Z

$ cd openblas-v0.2.2/lapack-3.4.1
$ make lapack_testing

ViralBShah · 2012-07-15T02:37:36Z

This is what I get, with no change to TARGET or USE_THREAD.

---------------- Testing LAPACK Routines ----------------

-- Detailed results are stored in testing_results.txt

------------------------- REAL              ------------------------

-->  Testing REAL              Nonsymmetric Eigenvalue Problem [ snep.out ]
 SHS:    1 out of  1764 tests failed to pass the threshold
 SHS:    2 out of  1764 tests failed to pass the threshold
 SHS:    2 out of  1764 tests failed to pass the threshold
-->  Tests passed: 3528
-->  Tests failing to pass the threshold: 5

-->  Testing REAL              Symmetric Eigenvalue Problem [ ssep.out ]
-->  Tests passed: 89520

-->  Testing REAL              Singular Value Decomposition [ ssvd.out ]
-->  Tests passed: 69350

-->  Testing REAL              Eigen Condition [ sec.out ]
-->  Tests passed: 501251

-->  Testing REAL              Nonsymmetric Eigenvalue [ sed.out ]
-->  Tests passed: 12982

-->  Testing REAL              Nonsymmetric Generalized Eigenvalue Problem [ sgg.out ]
-->  Tests passed: 13832

-->  Testing REAL              Nonsymmetric Generalized Eigenvalue Problem driver [ sgd.out ]
-->  Tests passed: 7830

-->  Testing REAL              Symmetric Eigenvalue Problem [ ssb.out ]
-->  Tests passed: 540

-->  Testing REAL              Symmetric Eigenvalue Generalized Problem [ ssg.out ]
-->  Tests passed: 30870

-->  Testing REAL              Banded Singular Value Decomposition routines [ sbb.out ]
-->  Tests passed: 6000

-->  Testing REAL              Generalized Linear Regression Model routines [ sglm.out ]
-->  Tests passed: 48

-->  Testing REAL              Generalized QR and RQ factorization routines [ sgqr.out ]
-->  Tests passed: 1728

-->  Testing REAL              Generalized Singular Value Decomposition routines [ sgsv.out ]
-->  Tests passed: 384

-->  Testing REAL              CS Decomposition routines [ scsd.out ]
-->  Tests passed: 270

-->  Testing REAL              Constrained Linear Least Squares routines [ slse.out ]
-->  Tests passed: 96

-->  Testing REAL              Linear Equation routines [ stest.out ]
 SGE:    219 out of   3653 tests failed to pass the threshold
 SGE drivers:    336 out of   4884 tests failed to pass the threshold
-->  Tests passed: 312011
-->  Tests failing to pass the threshold: 555

-->  Testing REAL              RFP linear equation routines [ stest_rfp.out ]
-->  Tests passed: 13176


------------------------- DOUBLE PRECISION ------------------------

-->  Testing DOUBLE PRECISION Nonsymmetric Eigenvalue Problem [ dnep.out ]
-->  Tests passed: 8820

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Problem [ dsep.out ]
-->  Tests passed: 89520

-->  Testing DOUBLE PRECISION Singular Value Decomposition [ dsvd.out ]
-->  Tests passed: 69350

-->  Testing DOUBLE PRECISION Eigen Condition [ dec.out ]
-->  Tests passed: 501251

-->  Testing DOUBLE PRECISION Nonsymmetric Eigenvalue [ ded.out ]
-->  Tests passed: 12982

-->  Testing DOUBLE PRECISION Nonsymmetric Generalized Eigenvalue Problem [ dgg.out ]
-->  Tests passed: 13832

-->  Testing DOUBLE PRECISION Nonsymmetric Generalized Eigenvalue Problem driver [ dgd.out ]
-->  Tests passed: 7830

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Problem [ dsb.out ]
-->  Tests passed: 540

-->  Testing DOUBLE PRECISION Symmetric Eigenvalue Generalized Problem [ dsg.out ]
-->  Tests passed: 30870

-->  Testing DOUBLE PRECISION Banded Singular Value Decomposition routines [ dbb.out ]
-->  Tests passed: 6000

-->  Testing DOUBLE PRECISION Generalized Linear Regression Model routines [ dglm.out ]
-->  Tests passed: 48

-->  Testing DOUBLE PRECISION Generalized QR and RQ factorization routines [ dgqr.out ]
-->  Tests passed: 1728

-->  Testing DOUBLE PRECISION Generalized Singular Value Decomposition routines [ dgsv.out ]
-->  Tests passed: 384

-->  Testing DOUBLE PRECISION CS Decomposition routines [ dcsd.out ]
-->  Tests passed: 270

-->  Testing DOUBLE PRECISION Constrained Linear Least Squares routines [ dlse.out ]
-->  Tests passed: 96

-->  Testing DOUBLE PRECISION Linear Equation routines [ dtest.out ]
 DGE:    496 out of   3653 tests failed to pass the threshold
 DGE drivers:    700 out of   4896 tests failed to pass the threshold
-->  Tests passed: 312011
-->  Tests failing to pass the threshold: 1196

-->  Testing DOUBLE PRECISION Mixed Precision linear equation routines [ dstest.out ]
 DSGESV:    130 out of    324 tests failed to pass the threshold
-->  Tests passed: 488
-->  Tests failing to pass the threshold: 130

-->  Testing DOUBLE PRECISION RFP linear equation routines [ dtest_rfp.out ]
-->  Tests passed: 13176


------------------------- COMPLEX           ------------------------

-->  Testing COMPLEX           Nonsymmetric Eigenvalue Problem [ cnep.out ]
 CHS:    2 out of  1764 tests failed to pass the threshold
 CHS:    2 out of  1764 tests failed to pass the threshold
-->  Tests passed: 5292
-->  Tests failing to pass the threshold: 4

-->  Testing COMPLEX           Symmetric Eigenvalue Problem [ csep.out ]
-->  Tests passed: 77280

-->  Testing COMPLEX           Singular Value Decomposition [ csvd.out ]
-->  Tests passed: 44625

-->  Testing COMPLEX           Eigen Condition [ cec.out ]
-->  Tests passed: 5966

-->  Testing COMPLEX           Nonsymmetric Eigenvalue [ ced.out ]
-->  Tests passed: 12778

-->  Testing COMPLEX           Nonsymmetric Generalized Eigenvalue Problem [ cgg.out ]
-->  Tests passed: 13832

-->  Testing COMPLEX           Nonsymmetric Generalized Eigenvalue Problem driver [ cgd.out ]
-->  Tests passed: 7830

-->  Testing COMPLEX           Symmetric Eigenvalue Problem [ csb.out ]
-->  Tests passed: 540

-->  Testing COMPLEX           Symmetric Eigenvalue Generalized Problem [ csg.out ]
-->  Tests passed: 30870

-->  Testing COMPLEX           Banded Singular Value Decomposition routines [ cbb.out ]
-->  Tests passed: 6000

-->  Testing COMPLEX           Generalized Linear Regression Model routines [ cglm.out ]
-->  Tests passed: 48

-->  Testing COMPLEX           Generalized QR and RQ factorization routines [ cgqr.out ]
-->  Tests passed: 1728

-->  Testing COMPLEX           Generalized Singular Value Decomposition routines [ cgsv.out ]
-->  Tests passed: 384

-->  Testing COMPLEX           CS Decomposition routines [ ccsd.out ]
-->  Tests passed: 270

-->  Testing COMPLEX           Constrained Linear Least Squares routines [ clse.out ]
-->  Tests passed: 96

-->  Testing COMPLEX           Linear Equation routines [ ctest.out ]
 CGE:    491 out of   3653 tests failed to pass the threshold
 CGE drivers:    683 out of   4896 tests failed to pass the threshold
-->  Tests passed: 290052
-->  Tests failing to pass the threshold: 1174

-->  Testing COMPLEX           RFP linear equation routines [ ctest_rfp.out ]
  CTFSM auxiliary routine:     1 out of  7776 tests failed to pass the threshold
-->  Tests passed: 5400
-->  Tests failing to pass the threshold: 1


------------------------- COMPLEX16          ------------------------

-->  Testing COMPLEX16          Nonsymmetric Eigenvalue Problem [ znep.out ]
-->  Tests passed: 8820

-->  Testing COMPLEX16          Symmetric Eigenvalue Problem [ zsep.out ]
-->  Tests passed: 77280

-->  Testing COMPLEX16          Singular Value Decomposition [ zsvd.out ]
-->  Tests passed: 44625

-->  Testing COMPLEX16          Eigen Condition [ zec.out ]
-->  Tests passed: 5966

-->  Testing COMPLEX16          Nonsymmetric Eigenvalue [ zed.out ]
-->  Tests passed: 12778

-->  Testing COMPLEX16          Nonsymmetric Generalized Eigenvalue Problem [ zgg.out ]
-->  Tests passed: 13832

-->  Testing COMPLEX16          Nonsymmetric Generalized Eigenvalue Problem driver [ zgd.out ]
-->  Tests passed: 7830

-->  Testing COMPLEX16          Symmetric Eigenvalue Problem [ zsb.out ]
-->  Tests passed: 540

-->  Testing COMPLEX16          Symmetric Eigenvalue Generalized Problem [ zsg.out ]
-->  Tests passed: 30870

-->  Testing COMPLEX16          Banded Singular Value Decomposition routines [ zbb.out ]
-->  Tests passed: 6000

-->  Testing COMPLEX16          Generalized Linear Regression Model routines [ zglm.out ]
-->  Tests passed: 48

-->  Testing COMPLEX16          Generalized QR and RQ factorization routines [ zgqr.out ]
-->  Tests passed: 1728

-->  Testing COMPLEX16          Generalized Singular Value Decomposition routines [ zgsv.out ]
-->  Tests passed: 384

-->  Testing COMPLEX16          CS Decomposition routines [ zcsd.out ]
-->  Tests passed: 270

-->  Testing COMPLEX16          Constrained Linear Least Squares routines [ zlse.out ]
-->  Tests passed: 96

-->  Testing COMPLEX16          Linear Equation routines [ ztest.out ]
 ZGE:    495 out of   3653 tests failed to pass the threshold
 ZGE drivers:    693 out of   4896 tests failed to pass the threshold
-->  Tests passed: 318836
-->  Tests failing to pass the threshold: 1188

-->  Testing COMPLEX16          Mixed Precision linear equation routines [ zctest.out ]
 ZCGESV:    144 out of    324 tests failed to pass the threshold
-->  Tests passed: 488
-->  Tests failing to pass the threshold: 144

-->  Testing COMPLEX16          RFP linear equation routines [ ztest_rfp.out ]
-->  Tests passed: 13176


            -->   LAPACK TESTING SUMMARY  <--
        Processing LAPACK Testing output found in the TESTING direcory
SUMMARY                 nb test run     numerical error     other error  
================    =========== =================   ================  
REAL                1063416     560 (0.053%)    0   (0.000%)    
DOUBLE PRECISION    1069196     1326    (0.124%)    0   (0.000%)    
COMPLEX             502991      1179    (0.234%)    0   (0.000%)    
COMPLEX16           543567      1332    (0.245%)    0   (0.000%)    

--> ALL PRECISIONS  3179170     4397    (0.138%)    0   (0.000%)

ViralBShah · 2012-07-15T02:39:30Z

The real issue for me is that julia's tests are failing, which don't fail when openblas is built with gcc. Of course, this could be a bug in julia, and may have nothing to do with openblas.

JuliaLang/julia#1013

xianyi · 2012-07-15T03:42:12Z

Hi,
I think this issue may be relate to avx flag register in multithreading.

From my iPad

在 2012-7-15，上午10:39，"Viral B. Shah"[email protected] 写道：

The real issue for me is that julia's tests are failing, which don't fail when openblas is built with gcc. Of course, this could be a bug in julia, and may have nothing to do with openblas.

JuliaLang/julia#1013

Reply to this email directly or view it on GitHub:
#125 (comment)

zhenyuez · 2012-07-18T01:51:53Z

Hi:

I am testing with the same result as the first one. I am using gcc 4.6.1 and cpu i5-2500K @4.2Ghz.

-->   LAPACK TESTING SUMMARY  <--
    Processing LAPACK Testing output found in the TESTING direcory

SUMMARY nb test run numerical error other error
================ =========== ================= ================
REAL 1063416 563 (0.053%) 0 (0.000%)
DOUBLE PRECISION 1069196 1326 (0.124%) 0 (0.000%)
COMPLEX 501227 1184 (0.236%) 0 (0.000%)
COMPLEX16 543567 1332 (0.245%) 0 (0.000%)

--> ALL PRECISIONS 3177406 4405 (0.139%) 0 (0.000%)

But the test result on my laptop with Arrandale cpu test has only one error.

        -->   LAPACK TESTING SUMMARY  <--
    Processing LAPACK Testing output found in the TESTING direcory

SUMMARY nb test run numerical error other error
================ =========== ================= ================
REAL 1077227 0 (0.000%) 0 (0.000%)
DOUBLE PRECISION 1078039 0 (0.000%) 0 (0.000%)
COMPLEX 515038 1 (0.000%) 0 (0.000%)
COMPLEX16 552410 0 (0.000%) 0 (0.000%)

--> ALL PRECISIONS 3222714 1 (0.000%) 0 (0.000%)

It must has something to do with AVX in sandybridge.
zhenyue

xianyi · 2012-07-18T03:02:40Z

Hi Zhenyue,

Thank you for your report.

We are working on this issue now.

Thanks

Xianyi

2012/7/18 zhenyuez <
[email protected]

Hi:

I am testing with the same result as the first one. I am using gcc 4.6.1
and cpu i5-2500K @4.2Ghz.
    -->   LAPACK TESTING SUMMARY  <--
            Processing LAPACK Testing output found in the TESTING
direcory
SUMMARY nb test run numerical error other error

================ =========== =================

REAL 1063416 563 (0.053%) 0
(0.000%)
DOUBLE PRECISION 1069196 1326 (0.124%) 0
(0.000%)
COMPLEX 501227 1184 (0.236%) 0
(0.000%)
COMPLEX16 543567 1332 (0.245%) 0
(0.000%)

--> ALL PRECISIONS 3177406 4405 (0.139%) 0
(0.000%)

But the test result on my laptop with Arrandale cpu test has only one
error.
                    -->   LAPACK TESTING SUMMARY  <--
            Processing LAPACK Testing output found in the TESTING
direcory
SUMMARY nb test run numerical error other error

================ =========== =================

REAL 1077227 0 (0.000%) 0
(0.000%)
DOUBLE PRECISION 1078039 0 (0.000%) 0
(0.000%)
COMPLEX 515038 1 (0.000%) 0
(0.000%)
COMPLEX16 552410 0 (0.000%) 0
(0.000%)

--> ALL PRECISIONS 3222714 1 (0.000%) 0
(0.000%)

It must has something to do with AVX in sandybridge.
zhenyue

Reply to this email directly or view it on GitHub:
#125 (comment)

ViralBShah · 2012-08-12T19:28:28Z

Does the fix in #130 help improve things here?

xianyi · 2012-08-13T07:30:41Z

Hi @ViralBShah , @zhenyuez , @nolta ,

I just tested develop branch's lapack on our Sandy Bridge server.

Ubuntu 12.04 LTS

Linux ubuntu 3.5.0-1-generic #1-Ubuntu SMP Tue Jun 19 14:24:43 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

OpenBLAS build complete.

OS ... Linux
Architecture ... x86_64
BINARY ... 64bit
C compiler ... GCC (command line : gcc)
Fortran compiler ... GFORTRAN (command line : gfortran)
Library Name ... libopenblas_sandybridgep-r0.2.2.a (Multi threaded; Max num-threads is 16)

gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

The results are:

               -->   LAPACK TESTING SUMMARY  <--
            Processing LAPACK Testing output found in the TESTING direcory
            SUMMARY                 nb test run     numerical error         other error
            ================        ===========     =================       ================
           REAL                                     1071935         7       (0.001%)        0       (0.000%)
           DOUBLE PRECISION        1078039         0       (0.000%)        0       (0.000%)
           COMPLEX                              511510          7       (0.001%)        0       (0.000%)
           COMPLEX16                         552410          0       (0.000%)        0       (0.000%)

           --> ALL PRECISIONS        3213894         14      (0.000%)        0       (0.000%)

I don't know whether I fixed this bug or not.

xianyi · 2012-08-13T15:37:06Z

Hi,

I also tested on Mac OS X 10.8 with clang or gcc 4.7.

The outputs are,

    Processing LAPACK Testing output found in the TESTING direcory
    SUMMARY                 nb test run     numerical error     other error  
    ================    =========== =================   ================  
    REAL                1071935     5   (0.000%)    0   (0.000%)    
    DOUBLE PRECISION    1078039     0   (0.000%)    0   (0.000%)    
    COMPLEX             511510      4   (0.001%)    0   (0.000%)    
    COMPLEX16           552410      0   (0.000%)    0   (0.000%)    

    --> ALL PRECISIONS  3213894     9   (0.000%)    0   (0.000%)

ViralBShah · 2012-08-17T12:44:55Z

@xianyi I am trying this out now.

ViralBShah · 2012-08-17T13:57:33Z

All julia lapack tests that were failing earlier are now passing for me. Using clang 4.0 on OS X 10.7.4.

xianyi · 2012-08-19T09:08:11Z

Hi @ViralBShah ,

Thank you for the report. I will release this version next week.

Xianyi

ghost assigned xianyi Jul 25, 2012

xianyi closed this as completed Aug 19, 2012

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lapack test failures on sandybridge #125

lapack test failures on sandybridge #125

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lapack test failures on sandybridge #125

lapack test failures on sandybridge #125

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