Add devicemap to spmm benchmark

[devreal]

Add a simple device mapping for the SPMM benchmark. This mapping mashes together i and j such that all k for [i, j] run on the same device. Maybe there are better approaches?

Here is the performance on Seawulf:

1 device:

TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.163009 gflops/s= 3952.21
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.115536 gflops/s= 5576.14
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.115596 gflops/s= 5573.25
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.104487 gflops/s= 6165.79
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.104266 gflops/s= 6178.86

2 devices without mapping:

TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.2646 gflops/s= 2434.79
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.370376 gflops/s= 1739.44
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.413399 gflops/s= 1558.41
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.411325 gflops/s= 1566.27
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.27798 gflops/s= 2317.6

2 devices with mapping:

TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.120567 gflops/s= 5343.46
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.076282 gflops/s= 8445.57
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.076096 gflops/s= 8466.21
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.075933 gflops/s= 8484.39
TTG-PARSEC PxQxR=   1 1 1 1 average_NB= 1.00033e+06 M= 1200 N= 16384 K= 16384 t= 1024 T=1024 Tiling= RandomIrregularTiling A_density= 1 B_density= 1 gflops= 644.245 seconds= 0.08367 gflops/s= 7699.83

[therault]

See my comment inline. Otherwise, the checks are failing because some tests in PaRSEC fail to compile... Is this a new behavior? This is unrelated to the changes in this PR.

[therault]

LGTM

[devreal]

@therault comments are noted. I will merge this to incorporate it into #273 and include it in the restructuring happening there. We will revisit the mapping later.