Changeset 11672:efd0d0343ee9

---------------------------

arm, config: [2/2] added support for ex5 model of big.LITTLE
This patch enables using calibrated big and LITTLE

cores, ex5_big and ex5_LITTLE instead of the default

'arm_detailed' and 'minor' cpus. The ex5 model is based

on the Samsung Exynos 5 Octa (5422) SoC. Operation and

memory hierarchy latencies have been calibrated using the

lmbench micro-benchmark suite (lat_ops and lat_mem_rd).

NOTE: appropriate dtb files are required to support the big.LITTLE_fs device tree. 
lat_ops bench results:

----------------------------------------------

                     big          LITTLE

ops             SoC     gem5    SoC     gem5

----------------------------------------------

integer bit:    0.5     0.48    0.72    0.7

integer add:    0.5     0.55    0.72    0.4

integer mul:    1.56    1.68    2.16    1.87

integer div:    45.36   36.32   53.3    47.32

integer mod:    6.56    18.55   17.37   18.02

int64   bit:    0.51    0.98    1.45    1.42

uint64  add:    0.63    0.98    1.56    0.93

int64   mul:    2.52    2.13    3.64    4.68

int64   div:    92.61   195.52  213.14  197.63

int64   mod:    47.91   146.78  135.41  138.91

float   add:    2.52    2.71    2.88    2.61

float   mul:    3.02    2.84    2.88    2.73

float   div:    9.07    8.94    12.98   2.82

double  add:    2.52    2.71    2.88    2.61

double  mul:    3.02    2.84    5.04    2.73

double  div:    16.13   10.43   23.03   2.81
lat_mem_rd bench results:

----------------------------------------------

                   big            LITTLE

cache   mem     SoC     gem5    SoC     gem5

----------------------------------------------

l1/l1   0.5K    4       4       3       3

        1K      4       4       3       3

        2K      4       4       3       3

        3K      4       4       3       3

        4K      4       4       3       3

        6K      4       4       3       3

        8K      4       4       3       3

        12K     4       4       3       3

        16K     4       18      3       3

        24K     13      17      3       3

        32K     18      18      6       11

l2/l2   48K     23      20      9       14

        64K     22      23      11      14

        96K     23      23      13      14

        128K    23      23      14      15

        192K    23      23      15      17

        256K    23      23      17      17

        384K    23      24      29      17

        512K    23      24      59      39

l2/Mem  768K    23      24      86      97

        1M      23      24      112     110

        1.5M    35      25      153     147

        2M      81      56      165     172

Mem/Mem 3M      167     162     170     179

        4M      217     213     171     182

        6M      251     247     171     182

        8M      260     257     171     182

        12M     263     261     171     182

        16M     265     261     171     182
Reported-by: Anastasiia Butko <abutko@lbl.gov>