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MLPBench - pointer chasing benchmark for Windows

Overview

This project is non-1:1 copy of Lemire's testingmlp, but for Windows specifically.

⚠️ WORK IN PROGRESS ⚠️

This project is not finished yet. It may contain bugs, probably won't support your setup, and the code is 120% messy.

Build and run

To build this project from sources most recent Visual Studio (at least 17.7) is needed.

This project uses large pages which are not allowed by default for any user. To enable it follow instructions from this link.

Admin privileges are required to run this program properly (to manipulate MSR registers).

Troubleshooting

In a case of such error:

Memory incorrectly allocated: error = 1450

system reboot may be required. If it doesn't help, you may not have enough RAM for system to allocate 2GB of non-paged memory.

Sample output

RAM Info:
 * Channels: 2
 * Speed [MT/s]: 3200
 * Theoretical bandwidth: 51.2GB/s

CPU Info (AMD Ryzen 7 5800H with Radeon Graphics):
 * Physical cores: 8
 * Logical cores: 16
 * Hyperthreading: true

Allocating non-paged (locked) memory of size 2147483648 bytes with system decided page sizes...
Memory aligned to 1073741824 bytes: data pointer = 0x24100000000

Allocating paged memory of size 2147483648 bytes with default (4KB size) pages
Memory aligned to 4096 bytes: data pointer = 0x24180009000

Initializing array made of 268435456 (2048 MB) 64-bit words...
Verifying sequential/random access and paged/non-paged access sums...

Calculating time for sequential access (64 rounds)...
--------------------------------------------------------------------------------------------------------------
- prefetcher --- huge pages --- # of threads --- time (s) --- bandwidth --- speedup --- ns/hit --- % eff max -
--------------------------------------------------------------------------------------------------------------
        true          false                1        5.482       25071.0        1.00      0.319          49.0
        true          false                2        3.310       41522.3        1.66      0.193          81.1
        true          false                4        3.050       45062.0        1.80      0.178          88.0
        true          false                8        3.193       43043.8        1.72      0.186          84.1
        true          false               16        3.250       42288.9        1.69      0.189          82.6
        true          false               32        3.253       42249.9        1.69      0.189          82.5
= ---------------------------------------------------------------------------------------------------------- =
        true           true                1        4.938       27832.9        1.11      0.287          54.4
        true           true                2        3.112       44164.2        1.76      0.181          86.3
        true           true                4        3.055       44988.2        1.79      0.178          87.9
        true           true                8        3.178       43247.0        1.72      0.185          84.5
        true           true               16        3.254       42236.9        1.68      0.189          82.5
        true           true               32        3.289       41787.5        1.67      0.191          81.6
= ---------------------------------------------------------------------------------------------------------- =
       false          false                1       17.871        7690.6        0.31      1.040          15.0
       false          false                2        8.897       15447.8        0.62      0.518          30.2
       false          false                4        4.681       29361.0        1.17      0.272          57.3
       false          false                8        3.056       44973.5        1.79      0.178          87.8
       false          false               16        3.074       44710.1        1.78      0.179          87.3
       false          false               32        3.097       44378.1        1.77      0.180          86.7
= ---------------------------------------------------------------------------------------------------------- =
       false           true                1       17.754        7741.3        0.31      1.033          15.1
       false           true                2        8.844       15540.4        0.62      0.515          30.4
       false           true                4        4.642       29607.7        1.18      0.270          57.8
       false           true                8        3.039       45225.1        1.80      0.177          88.3
       false           true               16        3.074       44710.1        1.78      0.179          87.3
       false           true               32        3.078       44652.0        1.78      0.179          87.2

Calculating time for random access (4 rounds)...
-----------------------------------------------------------------------------------------------------------------------------------
- prefetcher --- huge pages --- # of threads --- lanes per thread --- time (s) --- bandwidth --- speedup --- ns/hit --- % eff seq -
-----------------------------------------------------------------------------------------------------------------------------------
        true          false                1                    1      139.237          61.7        1.00      129.7           0.1
        true          false                1                    2       70.968         121.0        1.96       66.1           0.3
        true          false                1                    4       34.676         247.7        4.02       32.3           0.5
        true          false                1                    8       17.082         502.9        8.15       15.9           1.1
        true          false                1                   16        8.599         998.9       16.19        8.0           2.2
        true          false                1                   32        6.248        1374.8       22.29        5.8           3.0
-----------------------------------------------------------------------------------------------------------------------------------
        true          false                2                    1       75.510         113.8        1.84       70.3           0.3
        true          false                2                    2       35.502         242.0        3.92       33.1           0.5
        true          false                2                    4       16.707         514.2        8.33       15.6           1.1
        true          false                2                    8        8.513        1009.0       16.36        7.9           2.2
        true          false                2                   16        4.555        1885.8       30.57        4.2           4.2
        true          false                2                   32        3.332        2578.0       41.79        3.1           5.7
-----------------------------------------------------------------------------------------------------------------------------------
        true          false                4                    1       36.501         235.3        3.81       34.0           0.5
        true          false                4                    2       16.669         515.3        8.35       15.5           1.1
        true          false                4                    4        8.432        1018.7       16.51        7.9           2.3
        true          false                4                    8        4.477        1918.7       31.10        4.2           4.2
        true          false                4                   16        2.545        3375.2       54.71        2.4           7.5
        true          false                4                   32        2.052        4186.1       67.85        1.9           9.3
-----------------------------------------------------------------------------------------------------------------------------------
        true          false                8                    1       17.772         483.3        7.83       16.6           1.1
        true          false                8                    2        8.267        1039.1       16.84        7.7           2.3
        true          false                8                    4        4.409        1948.3       31.58        4.1           4.3
        true          false                8                    8        2.529        3396.6       55.06        2.4           7.5
        true          false                8                   16        1.955        4393.8       71.22        1.8           9.7
        true          false                8                   32        1.832        4688.8       76.00        1.7          10.4
-----------------------------------------------------------------------------------------------------------------------------------
        true          false               16                    1        9.153         938.5       15.21        8.5           2.1
        true          false               16                    2        4.635        1853.3       30.04        4.3           4.1
        true          false               16                    4        2.726        3151.1       51.08        2.5           7.0
        true          false               16                    8        1.814        4735.4       76.76        1.7          10.5
        true          false               16                   16        1.811        4743.2       76.88        1.7          10.5
        true          false               16                   32        1.885        4557.0       73.87        1.8          10.1
-----------------------------------------------------------------------------------------------------------------------------------
        true           true                1                    1      106.127          80.9        1.31       98.8           0.2
        true           true                1                    2       53.622         160.2        2.60       49.9           0.4
        true           true                1                    4       26.070         329.5        5.34       24.3           0.7
        true           true                1                    8       12.843         668.8       10.84       12.0           1.5
        true           true                1                   16        6.692        1283.6       20.81        6.2           2.8
        true           true                1                   32        4.886        1758.1       28.50        4.6           3.9
-----------------------------------------------------------------------------------------------------------------------------------
        true           true                2                    1       52.924         162.3        2.63       49.3           0.4
        true           true                2                    2       25.904         331.6        5.38       24.1           0.7
        true           true                2                    4       12.813         670.4       10.87       11.9           1.5
        true           true                2                    8        6.634        1294.8       20.99        6.2           2.9
        true           true                2                   16        3.648        2354.7       38.17        3.4           5.2
        true           true                2                   32        2.707        3173.2       51.44        2.5           7.0
-----------------------------------------------------------------------------------------------------------------------------------
        true           true                4                    1       26.504         324.1        5.25       24.7           0.7
        true           true                4                    2       12.703         676.2       10.96       11.8           1.5
        true           true                4                    4        6.564        1308.6       21.21        6.1           2.9
        true           true                4                    8        3.587        2394.7       38.82        3.3           5.3
        true           true                4                   16        2.214        3879.8       62.89        2.1           8.6
        true           true                4                   32        1.863        4610.8       74.74        1.7          10.2
-----------------------------------------------------------------------------------------------------------------------------------
        true           true                8                    1       12.984         661.6       10.72       12.1           1.5
        true           true                8                    2        6.425        1337.0       21.67        6.0           3.0
        true           true                8                    4        3.587        2394.7       38.82        3.3           5.3
        true           true                8                    8        2.178        3944.0       63.93        2.0           8.7
        true           true                8                   16        1.817        4727.5       76.63        1.7          10.5
        true           true                8                   32        1.814        4735.4       76.76        1.7          10.5
-----------------------------------------------------------------------------------------------------------------------------------
        true           true               16                    1        6.486        1324.4       21.47        6.0           2.9
        true           true               16                    2        3.753        2288.8       37.10        3.5           5.1
        true           true               16                    4        2.353        3650.6       59.17        2.2           8.1
        true           true               16                    8        1.742        4931.1       79.93        1.6          10.9
        true           true               16                   16        1.788        4804.2       77.87        1.7          10.6
        true           true               16                   32        1.823        4712.0       76.38        1.7          10.4
-----------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------
       false          false                1                    1      135.900          63.2        1.02      126.6           0.1
       false          false                1                    2       69.389         123.8        2.01       64.6           0.3
       false          false                1                    4       35.101         244.7        3.97       32.7           0.5
       false          false                1                    8       17.114         501.9        8.14       15.9           1.1
       false          false                1                   16        8.643         993.9       16.11        8.0           2.2
       false          false                1                   32        6.249        1374.6       22.28        5.8           3.0
-----------------------------------------------------------------------------------------------------------------------------------
       false          false                2                    1       72.784         118.0        1.91       67.8           0.3
       false          false                2                    2       35.358         242.9        3.94       32.9           0.5
       false          false                2                    4       16.721         513.7        8.33       15.6           1.1
       false          false                2                    8        8.397        1023.0       16.58        7.8           2.3
       false          false                2                   16        4.567        1880.9       30.49        4.3           4.2
       false          false                2                   32        3.330        2579.6       41.81        3.1           5.7
-----------------------------------------------------------------------------------------------------------------------------------
       false          false                4                    1       36.300         236.6        3.84       33.8           0.5
       false          false                4                    2       16.609         517.2        8.38       15.5           1.1
       false          false                4                    4        8.311        1033.6       16.75        7.7           2.3
       false          false                4                    8        4.371        1965.2       31.85        4.1           4.3
       false          false                4                   16        2.534        3389.9       54.95        2.4           7.5
       false          false                4                   32        2.017        4258.8       69.03        1.9           9.4
-----------------------------------------------------------------------------------------------------------------------------------
       false          false                8                    1       17.963         478.2        7.75       16.7           1.1
       false          false                8                    2        8.190        1048.8       17.00        7.6           2.3
       false          false                8                    4        4.272        2010.8       32.59        4.0           4.4
       false          false                8                    8        2.421        3548.1       57.51        2.3           7.8
       false          false                8                   16        1.839        4671.0       75.71        1.7          10.3
       false          false                8                   32        1.832        4688.8       76.00        1.7          10.4
-----------------------------------------------------------------------------------------------------------------------------------
       false          false               16                    1        9.218         931.9       15.10        8.6           2.1
       false          false               16                    2        4.383        1959.8       31.77        4.1           4.3
       false          false               16                    4        2.468        3480.5       56.42        2.3           7.7
       false          false               16                    8        1.773        4844.9       78.53        1.7          10.7
       false          false               16                   16        1.815        4732.7       76.71        1.7          10.5
       false          false               16                   32        1.830        4694.0       76.09        1.7          10.4
-----------------------------------------------------------------------------------------------------------------------------------
       false           true                1                    1      106.548          80.6        1.31       99.2           0.2
       false           true                1                    2       53.806         159.6        2.59       50.1           0.4
       false           true                1                    4       26.194         327.9        5.32       24.4           0.7
       false           true                1                    8       12.858         668.1       10.83       12.0           1.5
       false           true                1                   16        6.803        1262.7       20.47        6.3           2.8
       false           true                1                   32        4.899        1753.4       28.42        4.6           3.9
-----------------------------------------------------------------------------------------------------------------------------------
       false           true                2                    1       52.417         163.9        2.66       48.8           0.4
       false           true                2                    2       26.570         323.3        5.24       24.7           0.7
       false           true                2                    4       12.834         669.3       10.85       12.0           1.5
       false           true                2                    8        6.643        1293.1       20.96        6.2           2.9
       false           true                2                   16        3.654        2350.8       38.11        3.4           5.2
       false           true                2                   32        2.703        3177.9       51.51        2.5           7.0
-----------------------------------------------------------------------------------------------------------------------------------
       false           true                4                    1       26.988         318.3        5.16       25.1           0.7
       false           true                4                    2       12.718         675.4       10.95       11.8           1.5
       false           true                4                    4        6.523        1316.9       21.35        6.1           2.9
       false           true                4                    8        3.600        2386.1       38.68        3.4           5.3
       false           true                4                   16        2.248        3821.1       61.94        2.1           8.4
       false           true                4                   32        1.877        4576.4       74.18        1.7          10.1
-----------------------------------------------------------------------------------------------------------------------------------
       false           true                8                    1       13.185         651.5       10.56       12.3           1.4
       false           true                8                    2        6.352        1352.3       21.92        5.9           3.0
       false           true                8                    4        3.412        2517.6       40.81        3.2           5.6
       false           true                8                    8        2.170        3958.5       64.16        2.0           8.8
       false           true                8                   16        1.817        4727.5       76.63        1.7          10.5
       false           true                8                   32        1.823        4712.0       76.38        1.7          10.4
-----------------------------------------------------------------------------------------------------------------------------------
       false           true               16                    1        6.582        1305.1       21.15        6.1           2.9
       false           true               16                    2        3.436        2500.0       40.52        3.2           5.5
       false           true               16                    4        2.091        4108.1       66.59        1.9           9.1
       false           true               16                    8        1.770        4853.1       78.66        1.6          10.7
       false           true               16                   16        1.814        4735.4       76.76        1.7          10.5
       false           true               16                   32        1.817        4727.5       76.63        1.7          10.5
-----------------------------------------------------------------------------------------------------------------------------------

Total benchmark time: 4516.004s

TODOs

  • Add benchmarks for SSD data access
  • Add verbose/non-verbose mode
  • Add benchmark granularity (with --flags)

Changelog

  • v0.0.6 - 27.08.2023: Added benchmarks with hardware prefetching disabled
  • v0.0.5 - 25.08.2023: Added thread affinity, removed thread setup time from benchmarks, fixed rng repeatability
  • v0.0.4 - 22.08.2023: Added benchmarks with normal pages
  • v0.0.3 - 21.08.2023: Added multithreaded random access benchmark
  • v0.0.2 - 17.08.2023: Added system info, improved sequential access benchmark
  • v0.0.1 - 16.08.2023: Initial version

Code statistics (via gocloc)

$> gocloc /exclude-ext json,txt .
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
C++                              1            101             39            534
C++ Header                       5            101             45            404
Markdown                         1             26              0            234
C Header                         1             10             32             27
-------------------------------------------------------------------------------
TOTAL                            8            238            116           1199
-------------------------------------------------------------------------------