Olay, recompiled with the acpi-cpufreq driver, so the performance governor
actually works, pegging the frequency at 3900 MHz.
Existing (old) code:
[ 455.641397]
[ 455.641397] testing speed of crc32c
[ 455.641403] test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
73 cycles/operation, 4 cycles/byte
[ 455.641406] test 1 ( 64 byte blocks, 16 bytes per update, 4 updates):
418 cycles/operation, 6 cycles/byte
[ 455.641409] test 2 ( 64 byte blocks, 64 bytes per update, 1 updates):
89 cycles/operation, 1 cycles/byte
[ 455.641411] test 3 ( 256 byte blocks, 16 bytes per update, 16 updates):
1330 cycles/operation, 5 cycles/byte
[ 455.641417] test 4 ( 256 byte blocks, 64 bytes per update, 4 updates):
502 cycles/operation, 1 cycles/byte
[ 455.641420] test 5 ( 256 byte blocks, 256 bytes per update, 1 updates):
170 cycles/operation, 0 cycles/byte
[ 455.641422] test 6 ( 1024 byte blocks, 16 bytes per update, 64 updates):
4971 cycles/operation, 4 cycles/byte
[ 455.641440] test 7 ( 1024 byte blocks, 256 bytes per update, 4 updates):
805 cycles/operation, 0 cycles/byte
[ 455.641445] test 8 ( 1024 byte blocks, 1024 bytes per update, 1 updates):
371 cycles/operation, 0 cycles/byte
[ 455.641448] test 9 ( 2048 byte blocks, 16 bytes per update, 128 updates):
9839 cycles/operation, 4 cycles/byte
[ 455.641484] test 10 ( 2048 byte blocks, 256 bytes per update, 8 updates):
1436 cycles/operation, 0 cycles/byte
[ 455.641490] test 11 ( 2048 byte blocks, 1024 bytes per update, 2 updates):
824 cycles/operation, 0 cycles/byte
[ 455.641494] test 12 ( 2048 byte blocks, 2048 bytes per update, 1 updates):
494 cycles/operation, 0 cycles/byte
[ 455.641498] test 13 ( 4096 byte blocks, 16 bytes per update, 256 updates):
19561 cycles/operation, 4 cycles/byte
[ 455.641568] test 14 ( 4096 byte blocks, 256 bytes per update, 16 updates):
2757 cycles/operation, 0 cycles/byte
[ 455.641579] test 15 ( 4096 byte blocks, 1024 bytes per update, 4 updates):
1633 cycles/operation, 0 cycles/byte
[ 455.641586] test 16 ( 4096 byte blocks, 4096 bytes per update, 1 updates):
861 cycles/operation, 0 cycles/byte
[ 455.641590] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39015 cycles/operation, 4 cycles/byte
[ 455.641729] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5412 cycles/operation, 0 cycles/byte
[ 455.641749] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3106 cycles/operation, 0 cycles/byte
[ 455.641762] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1656 cycles/operation, 0 cycles/byte
[ 455.641769] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1639 cycles/operation, 0 cycles/byte
[ 480.885336]
[ 480.885336] testing speed of crc32c
[ 480.885342] test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
81 cycles/operation, 5 cycles/byte
[ 480.885345] test 1 ( 64 byte blocks, 16 bytes per update, 4 updates):
426 cycles/operation, 6 cycles/byte
[ 480.885348] test 2 ( 64 byte blocks, 64 bytes per update, 1 updates):
96 cycles/operation, 1 cycles/byte
[ 480.885350] test 3 ( 256 byte blocks, 16 bytes per update, 16 updates):
1331 cycles/operation, 5 cycles/byte
[ 480.885356] test 4 ( 256 byte blocks, 64 bytes per update, 4 updates):
497 cycles/operation, 1 cycles/byte
[ 480.885359] test 5 ( 256 byte blocks, 256 bytes per update, 1 updates):
179 cycles/operation, 0 cycles/byte
[ 480.885361] test 6 ( 1024 byte blocks, 16 bytes per update, 64 updates):
4961 cycles/operation, 4 cycles/byte
[ 480.885380] test 7 ( 1024 byte blocks, 256 bytes per update, 4 updates):
795 cycles/operation, 0 cycles/byte
[ 480.885384] test 8 ( 1024 byte blocks, 1024 bytes per update, 1 updates):
366 cycles/operation, 0 cycles/byte
[ 480.885387] test 9 ( 2048 byte blocks, 16 bytes per update, 128 updates):
9827 cycles/operation, 4 cycles/byte
[ 480.885423] test 10 ( 2048 byte blocks, 256 bytes per update, 8 updates):
1445 cycles/operation, 0 cycles/byte
[ 480.885430] test 11 ( 2048 byte blocks, 1024 bytes per update, 2 updates):
834 cycles/operation, 0 cycles/byte
[ 480.885434] test 12 ( 2048 byte blocks, 2048 bytes per update, 1 updates):
495 cycles/operation, 0 cycles/byte
[ 480.885437] test 13 ( 4096 byte blocks, 16 bytes per update, 256 updates):
19560 cycles/operation, 4 cycles/byte
[ 480.885507] test 14 ( 4096 byte blocks, 256 bytes per update, 16 updates):
2767 cycles/operation, 0 cycles/byte
[ 480.885518] test 15 ( 4096 byte blocks, 1024 bytes per update, 4 updates):
1643 cycles/operation, 0 cycles/byte
[ 480.885525] test 16 ( 4096 byte blocks, 4096 bytes per update, 1 updates):
862 cycles/operation, 0 cycles/byte
[ 480.885530] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39013 cycles/operation, 4 cycles/byte
[ 480.885669] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5417 cycles/operation, 0 cycles/byte
[ 480.885689] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3113 cycles/operation, 0 cycles/byte
[ 480.885701] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1665 cycles/operation, 0 cycles/byte
[ 480.885708] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1646 cycles/operation, 0 cycles/byte
Proposed (new) code:
[ 800.253907]
[ 800.253907] testing speed of crc32c
[ 800.253913] test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
75 cycles/operation, 4 cycles/byte
[ 800.253915] test 1 ( 64 byte blocks, 16 bytes per update, 4 updates):
421 cycles/operation, 6 cycles/byte
[ 800.253919] test 2 ( 64 byte blocks, 64 bytes per update, 1 updates):
88 cycles/operation, 1 cycles/byte
[ 800.253920] test 3 ( 256 byte blocks, 16 bytes per update, 16 updates):
1339 cycles/operation, 5 cycles/byte
[ 800.253942] test 4 ( 256 byte blocks, 64 bytes per update, 4 updates):
511 cycles/operation, 1 cycles/byte
[ 800.253945] test 5 ( 256 byte blocks, 256 bytes per update, 1 updates):
180 cycles/operation, 0 cycles/byte
[ 800.253947] test 6 ( 1024 byte blocks, 16 bytes per update, 64 updates):
4972 cycles/operation, 4 cycles/byte
[ 800.253966] test 7 ( 1024 byte blocks, 256 bytes per update, 4 updates):
789 cycles/operation, 0 cycles/byte
[ 800.253970] test 8 ( 1024 byte blocks, 1024 bytes per update, 1 updates):
371 cycles/operation, 0 cycles/byte
[ 800.253973] test 9 ( 2048 byte blocks, 16 bytes per update, 128 updates):
10093 cycles/operation, 4 cycles/byte
[ 800.254010] test 10 ( 2048 byte blocks, 256 bytes per update, 8 updates):
1443 cycles/operation, 0 cycles/byte
[ 800.254017] test 11 ( 2048 byte blocks, 1024 bytes per update, 2 updates):
829 cycles/operation, 0 cycles/byte
[ 800.254021] test 12 ( 2048 byte blocks, 2048 bytes per update, 1 updates):
495 cycles/operation, 0 cycles/byte
[ 800.254024] test 13 ( 4096 byte blocks, 16 bytes per update, 256 updates):
19556 cycles/operation, 4 cycles/byte
[ 800.254094] test 14 ( 4096 byte blocks, 256 bytes per update, 16 updates):
2762 cycles/operation, 0 cycles/byte
[ 800.254105] test 15 ( 4096 byte blocks, 1024 bytes per update, 4 updates):
1640 cycles/operation, 0 cycles/byte
[ 800.254113] test 16 ( 4096 byte blocks, 4096 bytes per update, 1 updates):
854 cycles/operation, 0 cycles/byte
[ 800.254117] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39015 cycles/operation, 4 cycles/byte
[ 800.254256] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5415 cycles/operation, 0 cycles/byte
[ 800.254276] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3113 cycles/operation, 0 cycles/byte
[ 800.254288] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1666 cycles/operation, 0 cycles/byte
[ 800.254295] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1638 cycles/operation, 0 cycles/byte
[ 808.113346]
[ 808.113346] testing speed of crc32c
[ 808.113353] test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
70 cycles/operation, 4 cycles/byte
[ 808.113355] test 1 ( 64 byte blocks, 16 bytes per update, 4 updates):
432 cycles/operation, 6 cycles/byte
[ 808.113359] test 2 ( 64 byte blocks, 64 bytes per update, 1 updates):
89 cycles/operation, 1 cycles/byte
[ 808.113360] test 3 ( 256 byte blocks, 16 bytes per update, 16 updates):
1330 cycles/operation, 5 cycles/byte
[ 808.113366] test 4 ( 256 byte blocks, 64 bytes per update, 4 updates):
514 cycles/operation, 2 cycles/byte
[ 808.113369] test 5 ( 256 byte blocks, 256 bytes per update, 1 updates):
171 cycles/operation, 0 cycles/byte
[ 808.113371] test 6 ( 1024 byte blocks, 16 bytes per update, 64 updates):
4968 cycles/operation, 4 cycles/byte
[ 808.113390] test 7 ( 1024 byte blocks, 256 bytes per update, 4 updates):
833 cycles/operation, 0 cycles/byte
[ 808.113394] test 8 ( 1024 byte blocks, 1024 bytes per update, 1 updates):
368 cycles/operation, 0 cycles/byte
[ 808.113398] test 9 ( 2048 byte blocks, 16 bytes per update, 128 updates):
9842 cycles/operation, 4 cycles/byte
[ 808.113434] test 10 ( 2048 byte blocks, 256 bytes per update, 8 updates):
1462 cycles/operation, 0 cycles/byte
[ 808.113440] test 11 ( 2048 byte blocks, 1024 bytes per update, 2 updates):
827 cycles/operation, 0 cycles/byte
[ 808.113444] test 12 ( 2048 byte blocks, 2048 bytes per update, 1 updates):
494 cycles/operation, 0 cycles/byte
[ 808.113448] test 13 ( 4096 byte blocks, 16 bytes per update, 256 updates):
19556 cycles/operation, 4 cycles/byte
[ 808.113518] test 14 ( 4096 byte blocks, 256 bytes per update, 16 updates):
2783 cycles/operation, 0 cycles/byte
[ 808.113529] test 15 ( 4096 byte blocks, 1024 bytes per update, 4 updates):
1645 cycles/operation, 0 cycles/byte
[ 808.113536] test 16 ( 4096 byte blocks, 4096 bytes per update, 1 updates):
853 cycles/operation, 0 cycles/byte
[ 808.113540] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39019 cycles/operation, 4 cycles/byte
[ 808.113679] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5437 cycles/operation, 0 cycles/byte
[ 808.113700] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3118 cycles/operation, 0 cycles/byte
[ 808.113712] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1652 cycles/operation, 0 cycles/byte
[ 808.113719] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1639 cycles/operation, 0 cycles/byte
As you can see, the differences look comparable to the spread in the
measured values. Considering just the last 4 tests (since only blocks
of at least 200 bytes are affected by the change), here are 10 more runs
of each:
Existing (old) code:
[ 2168.651975] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39013 cycles/operation, 4 cycles/byte
[ 2168.652114] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5425 cycles/operation, 0 cycles/byte
[ 2168.652134] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3121 cycles/operation, 0 cycles/byte
[ 2168.652146] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1654 cycles/operation, 0 cycles/byte
[ 2168.652153] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1644 cycles/operation, 0 cycles/byte
[ 2168.672956] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39025 cycles/operation, 4 cycles/byte
[ 2168.673095] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5494 cycles/operation, 0 cycles/byte
[ 2168.673116] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3113 cycles/operation, 0 cycles/byte
[ 2168.673157] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1674 cycles/operation, 0 cycles/byte
[ 2168.673169] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1636 cycles/operation, 0 cycles/byte
[ 2168.696197] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39012 cycles/operation, 4 cycles/byte
[ 2168.696336] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5410 cycles/operation, 0 cycles/byte
[ 2168.696356] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3119 cycles/operation, 0 cycles/byte
[ 2168.696368] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1667 cycles/operation, 0 cycles/byte
[ 2168.696375] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1635 cycles/operation, 0 cycles/byte
[ 2168.716198] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39015 cycles/operation, 4 cycles/byte
[ 2168.716337] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5543 cycles/operation, 0 cycles/byte
[ 2168.716358] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3111 cycles/operation, 0 cycles/byte
[ 2168.716370] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1673 cycles/operation, 0 cycles/byte
[ 2168.716377] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1636 cycles/operation, 0 cycles/byte
[ 2168.739520] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39022 cycles/operation, 4 cycles/byte
[ 2168.739659] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5484 cycles/operation, 0 cycles/byte
[ 2168.739680] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3110 cycles/operation, 0 cycles/byte
[ 2168.739692] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1687 cycles/operation, 0 cycles/byte
[ 2168.739699] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1640 cycles/operation, 0 cycles/byte
[ 2168.762814] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39015 cycles/operation, 4 cycles/byte
[ 2168.762953] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5412 cycles/operation, 0 cycles/byte
[ 2168.762973] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3109 cycles/operation, 0 cycles/byte
[ 2168.762985] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1675 cycles/operation, 0 cycles/byte
[ 2168.762992] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1634 cycles/operation, 0 cycles/byte
[ 2168.796244] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39008 cycles/operation, 4 cycles/byte
[ 2168.796383] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5413 cycles/operation, 0 cycles/byte
[ 2168.796403] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3106 cycles/operation, 0 cycles/byte
[ 2168.796415] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1658 cycles/operation, 0 cycles/byte
[ 2168.796422] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1637 cycles/operation, 0 cycles/byte
[ 2168.819616] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39040 cycles/operation, 4 cycles/byte
[ 2168.819757] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5416 cycles/operation, 0 cycles/byte
[ 2168.819777] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3109 cycles/operation, 0 cycles/byte
[ 2168.819814] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1674 cycles/operation, 0 cycles/byte
[ 2168.819823] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1649 cycles/operation, 0 cycles/byte
[ 2168.859652] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39011 cycles/operation, 4 cycles/byte
[ 2168.859806] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5412 cycles/operation, 0 cycles/byte
[ 2168.859826] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3117 cycles/operation, 0 cycles/byte
[ 2168.859841] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1665 cycles/operation, 0 cycles/byte
[ 2168.859850] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1639 cycles/operation, 0 cycles/byte
[ 2168.896378] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39023 cycles/operation, 4 cycles/byte
[ 2168.896532] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5424 cycles/operation, 0 cycles/byte
[ 2168.896554] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3126 cycles/operation, 0 cycles/byte
[ 2168.896567] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1664 cycles/operation, 0 cycles/byte
[ 2168.896574] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1634 cycles/operation, 0 cycles/byte
Proposed (new) code:
[ 2061.715381] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39018 cycles/operation, 4 cycles/byte
[ 2061.715520] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5420 cycles/operation, 0 cycles/byte
[ 2061.715540] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3101 cycles/operation, 0 cycles/byte
[ 2061.715552] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1662 cycles/operation, 0 cycles/byte
[ 2061.715559] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1647 cycles/operation, 0 cycles/byte
[ 2061.734935] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39029 cycles/operation, 4 cycles/byte
[ 2061.735074] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5416 cycles/operation, 0 cycles/byte
[ 2061.735094] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3253 cycles/operation, 0 cycles/byte
[ 2061.735107] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1685 cycles/operation, 0 cycles/byte
[ 2061.735114] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1642 cycles/operation, 0 cycles/byte
[ 2061.761667] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39027 cycles/operation, 4 cycles/byte
[ 2061.761806] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5415 cycles/operation, 0 cycles/byte
[ 2061.761826] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3112 cycles/operation, 0 cycles/byte
[ 2061.761838] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1673 cycles/operation, 0 cycles/byte
[ 2061.761845] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1644 cycles/operation, 0 cycles/byte
[ 2061.781846] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39010 cycles/operation, 4 cycles/byte
[ 2061.781985] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5424 cycles/operation, 0 cycles/byte
[ 2061.782005] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3242 cycles/operation, 0 cycles/byte
[ 2061.782018] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1687 cycles/operation, 0 cycles/byte
[ 2061.782025] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1641 cycles/operation, 0 cycles/byte
[ 2061.801881] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39020 cycles/operation, 4 cycles/byte
[ 2061.802020] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5424 cycles/operation, 0 cycles/byte
[ 2061.802041] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3113 cycles/operation, 0 cycles/byte
[ 2061.802053] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1673 cycles/operation, 0 cycles/byte
[ 2061.802060] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1638 cycles/operation, 0 cycles/byte
[ 2061.822194] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39034 cycles/operation, 4 cycles/byte
[ 2061.822333] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5414 cycles/operation, 0 cycles/byte
[ 2061.822353] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3246 cycles/operation, 0 cycles/byte
[ 2061.822366] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1703 cycles/operation, 0 cycles/byte
[ 2061.822373] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1643 cycles/operation, 0 cycles/byte
[ 2061.842361] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39017 cycles/operation, 4 cycles/byte
[ 2061.842500] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5411 cycles/operation, 0 cycles/byte
[ 2061.842520] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3115 cycles/operation, 0 cycles/byte
[ 2061.842532] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1671 cycles/operation, 0 cycles/byte
[ 2061.842539] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1641 cycles/operation, 0 cycles/byte
[ 2061.875909] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39020 cycles/operation, 4 cycles/byte
[ 2061.876048] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5414 cycles/operation, 0 cycles/byte
[ 2061.876068] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3250 cycles/operation, 0 cycles/byte
[ 2061.876081] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1699 cycles/operation, 0 cycles/byte
[ 2061.876088] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1640 cycles/operation, 0 cycles/byte
[ 2061.899397] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39017 cycles/operation, 4 cycles/byte
[ 2061.899536] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5420 cycles/operation, 0 cycles/byte
[ 2061.899556] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3109 cycles/operation, 0 cycles/byte
[ 2061.899568] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1683 cycles/operation, 0 cycles/byte
[ 2061.899576] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1640 cycles/operation, 0 cycles/byte
[ 2061.922872] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
39016 cycles/operation, 4 cycles/byte
[ 2061.923010] test 18 ( 8192 byte blocks, 256 bytes per update, 32 updates):
5538 cycles/operation, 0 cycles/byte
[ 2061.923032] test 19 ( 8192 byte blocks, 1024 bytes per update, 8 updates):
3248 cycles/operation, 0 cycles/byte
[ 2061.923044] test 20 ( 8192 byte blocks, 4096 bytes per update, 2 updates):
1683 cycles/operation, 0 cycles/byte
[ 2061.923052] test 21 ( 8192 byte blocks, 8192 bytes per update, 1 updates):
1640 cycles/operation, 0 cycles/byte
Averaging the 8K bytes per update, I do see an average of 3.2 cycles per
operation (that is, per 8K of data processed) lost, or about 1 cycle per
(3K or less) block processed. I'm hoping the reduced D-cache polution
makes it up somewhere else.
Comments?
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