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Source file src/runtime/sizeclasses.go

Documentation: runtime

     1  // Code generated by mksizeclasses.go; DO NOT EDIT.
     2  //go:generate go run mksizeclasses.go
     3  
     4  package runtime
     5  
     6  // class  bytes/obj  bytes/span  objects  tail waste  max waste
     7  //     1          8        8192     1024           0     87.50%
     8  //     2         16        8192      512           0     43.75%
     9  //     3         32        8192      256           0     46.88%
    10  //     4         48        8192      170          32     31.52%
    11  //     5         64        8192      128           0     23.44%
    12  //     6         80        8192      102          32     19.07%
    13  //     7         96        8192       85          32     15.95%
    14  //     8        112        8192       73          16     13.56%
    15  //     9        128        8192       64           0     11.72%
    16  //    10        144        8192       56         128     11.82%
    17  //    11        160        8192       51          32      9.73%
    18  //    12        176        8192       46          96      9.59%
    19  //    13        192        8192       42         128      9.25%
    20  //    14        208        8192       39          80      8.12%
    21  //    15        224        8192       36         128      8.15%
    22  //    16        240        8192       34          32      6.62%
    23  //    17        256        8192       32           0      5.86%
    24  //    18        288        8192       28         128     12.16%
    25  //    19        320        8192       25         192     11.80%
    26  //    20        352        8192       23          96      9.88%
    27  //    21        384        8192       21         128      9.51%
    28  //    22        416        8192       19         288     10.71%
    29  //    23        448        8192       18         128      8.37%
    30  //    24        480        8192       17          32      6.82%
    31  //    25        512        8192       16           0      6.05%
    32  //    26        576        8192       14         128     12.33%
    33  //    27        640        8192       12         512     15.48%
    34  //    28        704        8192       11         448     13.93%
    35  //    29        768        8192       10         512     13.94%
    36  //    30        896        8192        9         128     15.52%
    37  //    31       1024        8192        8           0     12.40%
    38  //    32       1152        8192        7         128     12.41%
    39  //    33       1280        8192        6         512     15.55%
    40  //    34       1408       16384       11         896     14.00%
    41  //    35       1536        8192        5         512     14.00%
    42  //    36       1792       16384        9         256     15.57%
    43  //    37       2048        8192        4           0     12.45%
    44  //    38       2304       16384        7         256     12.46%
    45  //    39       2688        8192        3         128     15.59%
    46  //    40       3072       24576        8           0     12.47%
    47  //    41       3200       16384        5         384      6.22%
    48  //    42       3456       24576        7         384      8.83%
    49  //    43       4096        8192        2           0     15.60%
    50  //    44       4864       24576        5         256     16.65%
    51  //    45       5376       16384        3         256     10.92%
    52  //    46       6144       24576        4           0     12.48%
    53  //    47       6528       32768        5         128      6.23%
    54  //    48       6784       40960        6         256      4.36%
    55  //    49       6912       49152        7         768      3.37%
    56  //    50       8192        8192        1           0     15.61%
    57  //    51       9472       57344        6         512     14.28%
    58  //    52       9728       49152        5         512      3.64%
    59  //    53      10240       40960        4           0      4.99%
    60  //    54      10880       32768        3         128      6.24%
    61  //    55      12288       24576        2           0     11.45%
    62  //    56      13568       40960        3         256      9.99%
    63  //    57      14336       57344        4           0      5.35%
    64  //    58      16384       16384        1           0     12.49%
    65  //    59      18432       73728        4           0     11.11%
    66  //    60      19072       57344        3         128      3.57%
    67  //    61      20480       40960        2           0      6.87%
    68  //    62      21760       65536        3         256      6.25%
    69  //    63      24576       24576        1           0     11.45%
    70  //    64      27264       81920        3         128     10.00%
    71  //    65      28672       57344        2           0      4.91%
    72  //    66      32768       32768        1           0     12.50%
    73  
    74  const (
    75  	_MaxSmallSize   = 32768
    76  	smallSizeDiv    = 8
    77  	smallSizeMax    = 1024
    78  	largeSizeDiv    = 128
    79  	_NumSizeClasses = 67
    80  	_PageShift      = 13
    81  )
    82  
    83  var class_to_size = [_NumSizeClasses]uint16{0, 8, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240, 256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024, 1152, 1280, 1408, 1536, 1792, 2048, 2304, 2688, 3072, 3200, 3456, 4096, 4864, 5376, 6144, 6528, 6784, 6912, 8192, 9472, 9728, 10240, 10880, 12288, 13568, 14336, 16384, 18432, 19072, 20480, 21760, 24576, 27264, 28672, 32768}
    84  var class_to_allocnpages = [_NumSizeClasses]uint8{0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 2, 3, 1, 3, 2, 3, 4, 5, 6, 1, 7, 6, 5, 4, 3, 5, 7, 2, 9, 7, 5, 8, 3, 10, 7, 4}
    85  
    86  type divMagic struct {
    87  	shift    uint8
    88  	shift2   uint8
    89  	mul      uint16
    90  	baseMask uint16
    91  }
    92  
    93  var class_to_divmagic = [_NumSizeClasses]divMagic{{0, 0, 0, 0}, {3, 0, 1, 65528}, {4, 0, 1, 65520}, {5, 0, 1, 65504}, {4, 9, 171, 0}, {6, 0, 1, 65472}, {4, 10, 205, 0}, {5, 9, 171, 0}, {4, 11, 293, 0}, {7, 0, 1, 65408}, {4, 9, 57, 0}, {5, 10, 205, 0}, {4, 12, 373, 0}, {6, 7, 43, 0}, {4, 13, 631, 0}, {5, 11, 293, 0}, {4, 13, 547, 0}, {8, 0, 1, 65280}, {5, 9, 57, 0}, {6, 9, 103, 0}, {5, 12, 373, 0}, {7, 7, 43, 0}, {5, 10, 79, 0}, {6, 10, 147, 0}, {5, 11, 137, 0}, {9, 0, 1, 65024}, {6, 9, 57, 0}, {7, 6, 13, 0}, {6, 11, 187, 0}, {8, 5, 11, 0}, {7, 8, 37, 0}, {10, 0, 1, 64512}, {7, 9, 57, 0}, {8, 6, 13, 0}, {7, 11, 187, 0}, {9, 5, 11, 0}, {8, 8, 37, 0}, {11, 0, 1, 63488}, {8, 9, 57, 0}, {7, 10, 49, 0}, {10, 5, 11, 0}, {7, 10, 41, 0}, {7, 9, 19, 0}, {12, 0, 1, 61440}, {8, 9, 27, 0}, {8, 10, 49, 0}, {11, 5, 11, 0}, {7, 13, 161, 0}, {7, 13, 155, 0}, {8, 9, 19, 0}, {13, 0, 1, 57344}, {8, 12, 111, 0}, {9, 9, 27, 0}, {11, 6, 13, 0}, {7, 14, 193, 0}, {12, 3, 3, 0}, {8, 13, 155, 0}, {11, 8, 37, 0}, {14, 0, 1, 49152}, {11, 8, 29, 0}, {7, 13, 55, 0}, {12, 5, 7, 0}, {8, 14, 193, 0}, {13, 3, 3, 0}, {7, 14, 77, 0}, {12, 7, 19, 0}, {15, 0, 1, 32768}}
    94  var size_to_class8 = [smallSizeMax/smallSizeDiv + 1]uint8{0, 1, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31}
    95  var size_to_class128 = [(_MaxSmallSize-smallSizeMax)/largeSizeDiv + 1]uint8{31, 32, 33, 34, 35, 36, 36, 37, 37, 38, 38, 39, 39, 39, 40, 40, 40, 41, 42, 42, 43, 43, 43, 43, 43, 44, 44, 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 46, 46, 47, 47, 47, 48, 48, 49, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 57, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66}
    96  

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