Factor flops 0.0000e+00 Mflops with v9.0.0

[edwardnjust]

I run the EXAMPLE pddrive3d, and the result shows Factor flops is 0, but Solve flops has number. Is it a bu

g?

[liuyangzhuan]

I cannot see your figure. Can you upload it again?

[edwardnjust]

the detailed output is :

---

.. blocking parameters from sp_ienv():
** relaxation : 60
** max supernode : 256
** estimated fill ratio : 5
** min GEMM mkn to use GPU : 5000
.. parallel environment:
** OpenMP threads : 16
** GPU enable? : 1

---

---

.. options:
** Fact : 0
** Equil : 1
** DiagInv : 0
** ParSymbFact : 0
** ColPerm : 4
** RowPerm : 1
** ReplaceTinyPivot : 0
** IterRefine : 0
** Trans : 0
** num_lookaheads : 10
** batchCount : 0
** SymPattern : 0
** lookahead_etree : 0
** Use_TensorCore : 0
** Use 3D algorithm : 1
** parameters that can be altered by environment variables:
** superlu_relax : 60
** superlu_maxsup : 256
** min GEMM mkn to use GPU : 5000
** GPU buffer size : 256000000
** GPU streams : 8
** estimated fill ratio : 5

---

first gpufree time: 0.2370
first blas create time: 1.8609
MPI_Query_thread with MPI_THREAD_MULTIPLE
STDC_VERSION 199901
Library version: 9.0.0
Input matrix file: ../../../Matrix/pangulu_matrix/apache2/apache2.rb
3D process grid: 1 X 1 X 1
GHS_psdef/apache2; 2006; ; ed: N. Gould et al. |1423
FormFullA: new_nnz = 4817870, k = 4817870
Time to read and distribute matrix 0.44
Matrix size min_mn 715176
Nonzeros in L 157313555
Nonzeros in U 157313555
nonzeros in L+U 313911934
nonzeros in LSUB 36278952

** Memory Usage **********************************
** Total highmark (MB):
Sum-of-all : 3426.29 | Avg : 3426.29 | Max : 3426.29
Max at rank 0, different stages (MB):
. symbfact 264.60
. distribution 3426.29
. numfact 2668.18
** NUMfact space (MB): (sum-of-all-processes)
L\U : 2668.18 | Total : 2668.18
. max at rank 0, max L+U memory (MB): 2668.18
. max at rank 0, peak buffer (MB): 0.00

---

** number of Tiny Pivots: 0

.. Sol 0: ||X - Xtrue|| / ||X|| = 3.790301e-13 max_i |x - xtrue|_i / |x|_i = 3.790301e-13

---

**** Time (seconds) ****
EQUIL time 0.021
ROWPERM time 0.107
COLPERM time 5.630
SYMBFACT time 0.708
DISTRIBUTE time 3.099
FACTOR time 14.094
Factor flops 0.000000e+00 Mflops 0.00
SOLVE time 0.453
Solve flops 6.278243e+08 Mflops 1385.81

---

[liuyangzhuan]

Ah, good catch. The latest c++ GPU factorization code doesn't quite compute the factor flops yet. We will work on how to fix this.

[edwardnjust]

When will fix the bug? I am trying to fix this bug recently. Could you give some advice about how to fix? Which are the relative cpp files?