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ToscaCopyPerformance.txt
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ToscaCopyPerformance.txt
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Comparison of speeds to copy of 1MiB with different methods
===========================================================
Min and max rates out of 10
Used iocsh functions: toscaCopy and toscaDmaTransfer
Time is measured with clock_gettime(CLOCK_MONOTONIC_RAW,...)
All VME traffic is to own slave window mapped to SMEM
memcpy
------
MEM->MEM
1.320 msec (757.4 MiB/s = 794.2 MB/s)
1.513 msec (660.7 MiB/s = 692.8 MB/s)
MEM->SMEM
25.365 msec (39.4 MiB/s = 41.3 MB/s)
25.422 msec (39.3 MiB/s = 41.2 MB/s)
MEM->USER
23.585 msec (42.4 MiB/s = 44.5 MB/s)
23.724 msec (42.2 MiB/s = 44.2 MB/s)
MEM->A32
70.736 msec (14.1 MiB/s = 14.8 MB/s)
71.056 msec (14.1 MiB/s = 14.8 MB/s)
SMEM->MEM
411.413 msec (2.4 MiB/s = 2.5 MB/s)
416.891 msec (2.4 MiB/s = 2.5 MB/s)
USER->MEM
402.444 msec (2.5 MiB/s = 2.6 MB/s)
403.344 msec (2.5 MiB/s = 2.6 MB/s)
A32->MEM
525.617 msec (1.9 MiB/s = 2.0 MB/s)
533.170 msec (1.9 MiB/s = 2.0 MB/s)
USER->SMEM
402.285 msec (2.5 MiB/s = 2.6 MB/s)
404.541 msec (2.5 MiB/s = 2.6 MB/s)
SMEM->USER
412.719 msec (2.4 MiB/s = 2.5 MB/s)
416.383 msec (2.4 MiB/s = 2.5 MB/s)
byte copy
---------
MEM->MEM
2.798 msec (357.4 MiB/s = 374.7 MB/s)
2.846 msec (351.4 MiB/s = 368.5 MB/s)
MEM->SMEM
101.496 msec (9.9 MiB/s = 10.3 MB/s)
102.775 msec (9.7 MiB/s = 10.2 MB/s)
MEM->USER
94.510 msec (10.6 MiB/s = 11.1 MB/s)
95.527 msec (10.5 MiB/s = 11.0 MB/s)
MEM->A32
283.071 msec (3.5 MiB/s = 3.7 MB/s)
284.162 msec (3.5 MiB/s = 3.7 MB/s)
SMEM->MEM
1660.606 msec (0.6 MiB/s = 0.6 MB/s)
1666.229 msec (0.6 MiB/s = 0.6 MB/s)
USER->MEM
1612.290 msec (0.6 MiB/s = 0.7 MB/s)
1614.851 msec (0.6 MiB/s = 0.6 MB/s)
A32->MEM
2122.770 msec (0.5 MiB/s = 0.5 MB/s)
2131.868 msec (0.5 MiB/s = 0.5 MB/s)
USER->SMEM
1612.686 msec (0.6 MiB/s = 0.7 MB/s)
1613.845 msec (0.6 MiB/s = 0.6 MB/s)
SMEM->USER
1663.156 msec (0.6 MiB/s = 0.6 MB/s)
1665.193 msec (0.6 MiB/s = 0.6 MB/s)
word copy
---------
MEM->MEM
1.945 msec (514.2 MiB/s = 539.2 MB/s)
2.017 msec (495.9 MiB/s = 519.9 MB/s)
MEM->MEM WS
2.340 msec (427.3 MiB/s = 448.0 MB/s)
2.393 msec (417.9 MiB/s = 438.2 MB/s)
MEM->SMEM
50.732 msec (19.7 MiB/s = 20.7 MB/s)
51.094 msec (19.6 MiB/s = 20.5 MB/s)
MEM->SMEM WS
50.737 msec (19.7 MiB/s = 20.7 MB/s)
51.081 msec (19.6 MiB/s = 20.5 MB/s)
MEM->USER
47.247 msec (21.2 MiB/s = 22.2 MB/s)
47.482 msec (21.1 MiB/s = 22.1 MB/s)
MEM->USER WS
47.285 msec (21.1 MiB/s = 22.2 MB/s)
47.769 msec (20.9 MiB/s = 22.0 MB/s)
MEM->A32
141.514 msec (7.1 MiB/s = 7.4 MB/s)
144.876 msec (6.9 MiB/s = 7.2 MB/s)
MEM->A32 WS
141.515 msec (7.1 MiB/s = 7.4 MB/s)
141.857 msec (7.0 MiB/s = 7.4 MB/s)
SMEM->MEM
831.855 msec (1.2 MiB/s = 1.3 MB/s)
833.475 msec (1.2 MiB/s = 1.3 MB/s)
SMEM->MEM WS
827.115 msec (1.2 MiB/s = 1.3 MB/s)
832.365 msec (1.2 MiB/s = 1.3 MB/s)
USER->MEM
805.967 msec (1.2 MiB/s = 1.3 MB/s)
806.986 msec (1.2 MiB/s = 1.3 MB/s)
USER->MEM WS
806.169 msec (1.2 MiB/s = 1.3 MB/s)
806.781 msec (1.2 MiB/s = 1.3 MB/s)
A32->MEM
1065.191 msec (0.9 MiB/s = 1.0 MB/s)
1065.945 msec (0.9 MiB/s = 1.0 MB/s)
A32->MEM WS
1065.436 msec (0.9 MiB/s = 1.0 MB/s)
1066.810 msec (0.9 MiB/s = 1.0 MB/s)
USER->SMEM
801.049 msec (1.2 MiB/s = 1.3 MB/s)
807.182 msec (1.2 MiB/s = 1.3 MB/s)
USER->SMEM WS
804.260 msec (1.2 MiB/s = 1.3 MB/s)
807.599 msec (1.2 MiB/s = 1.3 MB/s)
SMEM->USER
831.500 msec (1.2 MiB/s = 1.3 MB/s)
832.301 msec (1.2 MiB/s = 1.3 MB/s)
SMEM->USER WS
831.731 msec (1.2 MiB/s = 1.3 MB/s)
832.375 msec (1.2 MiB/s = 1.3 MB/s)
dword copy
----------
MEM->MEM
1.430 msec (699.2 MiB/s = 733.2 MB/s)
1.662 msec (601.6 MiB/s = 630.9 MB/s)
MEM->MEM DS
1.330 msec (751.9 MiB/s = 788.5 MB/s)
1.512 msec (661.3 MiB/s = 693.4 MB/s)
MEM->SMEM
25.359 msec (39.4 MiB/s = 41.3 MB/s)
25.723 msec (38.9 MiB/s = 40.8 MB/s)
MEM->SMEM DS
25.353 msec (39.4 MiB/s = 41.4 MB/s)
25.381 msec (39.4 MiB/s = 41.3 MB/s)
MEM->USER
23.605 msec (42.4 MiB/s = 44.4 MB/s)
24.000 msec (41.7 MiB/s = 43.7 MB/s)
MEM->USER DS
23.613 msec (42.3 MiB/s = 44.4 MB/s)
23.792 msec (42.0 MiB/s = 44.1 MB/s)
MEM->A32
70.736 msec (14.1 MiB/s = 14.8 MB/s)
70.874 msec (14.1 MiB/s = 14.8 MB/s)
MEM->A32 DS
70.736 msec (14.1 MiB/s = 14.8 MB/s)
71.138 msec (14.1 MiB/s = 14.7 MB/s)
SMEM->MEM
413.813 msec (2.4 MiB/s = 2.5 MB/s)
418.549 msec (2.4 MiB/s = 2.5 MB/s)
SMEM->MEM DS
415.539 msec (2.4 MiB/s = 2.5 MB/s)
417.048 msec (2.4 MiB/s = 2.5 MB/s)
USER->MEM
402.791 msec (2.5 MiB/s = 2.6 MB/s)
403.888 msec (2.5 MiB/s = 2.6 MB/s)
USER->MEM DS
403.042 msec (2.5 MiB/s = 2.6 MB/s)
403.520 msec (2.5 MiB/s = 2.6 MB/s)
A32->MEM
527.564 msec (1.9 MiB/s = 2.0 MB/s)
532.986 msec (1.9 MiB/s = 2.0 MB/s)
A32->MEM DS
530.434 msec (1.9 MiB/s = 2.0 MB/s)
533.630 msec (1.9 MiB/s = 2.0 MB/s)
USER->SMEM
402.782 msec (2.5 MiB/s = 2.6 MB/s)
403.695 msec (2.5 MiB/s = 2.6 MB/s)
USER->SMEM DS
413.378 msec (2.4 MiB/s = 2.5 MB/s)
416.912 msec (2.4 MiB/s = 2.5 MB/s)
SMEM->USER
412.177 msec (2.4 MiB/s = 2.5 MB/s)
416.405 msec (2.4 MiB/s = 2.5 MB/s)
SMEM->USER DS
425.507 msec (2.4 MiB/s = 2.5 MB/s)
428.783 msec (2.3 MiB/s = 2.4 MB/s)
qword copy
----------
MEM->MEM
1.330 msec (751.6 MiB/s = 788.1 MB/s)
1.493 msec (670.0 MiB/s = 702.5 MB/s)
MEM->MEM QS
1.326 msec (754.2 MiB/s = 790.9 MB/s)
1.520 msec (657.8 MiB/s = 689.7 MB/s)
MEM->SMEM
25.372 msec (39.4 MiB/s = 41.3 MB/s)
25.515 msec (39.2 MiB/s = 41.1 MB/s)
MEM->SMEM QS
25.353 msec (39.4 MiB/s = 41.4 MB/s)
25.378 msec (39.4 MiB/s = 41.3 MB/s)
MEM->USER
23.606 msec (42.4 MiB/s = 44.4 MB/s)
24.100 msec (41.5 MiB/s = 43.5 MB/s)
MEM->USER QS
23.614 msec (42.3 MiB/s = 44.4 MB/s)
23.738 msec (42.1 MiB/s = 44.2 MB/s)
MEM->A32
70.735 msec (14.1 MiB/s = 14.8 MB/s)
71.734 msec (13.9 MiB/s = 14.6 MB/s)
MEM->A32 QS
70.735 msec (14.1 MiB/s = 14.8 MB/s)
70.845 msec (14.1 MiB/s = 14.8 MB/s)
SMEM->MEM
415.937 msec (2.4 MiB/s = 2.5 MB/s)
417.125 msec (2.4 MiB/s = 2.5 MB/s)
SMEM->MEM QS
415.712 msec (2.4 MiB/s = 2.5 MB/s)
416.896 msec (2.4 MiB/s = 2.5 MB/s)
USER->MEM
402.503 msec (2.5 MiB/s = 2.6 MB/s)
403.505 msec (2.5 MiB/s = 2.6 MB/s)
USER->MEM QS
401.104 msec (2.5 MiB/s = 2.6 MB/s)
403.433 msec (2.5 MiB/s = 2.6 MB/s)
A32->MEM
529.676 msec (1.9 MiB/s = 2.0 MB/s)
533.576 msec (1.9 MiB/s = 2.0 MB/s)
A32->MEM QS
532.934 msec (1.9 MiB/s = 2.0 MB/s)
534.289 msec (1.9 MiB/s = 2.0 MB/s)
USER->SMEM
408.660 msec (2.4 MiB/s = 2.6 MB/s)
410.612 msec (2.4 MiB/s = 2.6 MB/s)
USER->SMEM QS
410.141 msec (2.4 MiB/s = 2.6 MB/s)
410.911 msec (2.4 MiB/s = 2.6 MB/s)
SMEM->USER
417.884 msec (2.4 MiB/s = 2.5 MB/s)
420.187 msec (2.4 MiB/s = 2.5 MB/s)
SMEM->USER QS
416.701 msec (2.4 MiB/s = 2.5 MB/s)
419.280 msec (2.4 MiB/s = 2.5 MB/s)
DMA
---
MEM->SMEM
5.669 msec (176.4 MiB/s = 185.0 MB/s)
5.830 msec (171.5 MiB/s = 179.9 MB/s)
MEM->SMEM WS
5.666 msec (176.5 MiB/s = 185.1 MB/s)
5.782 msec (173.0 MiB/s = 181.4 MB/s)
MEM->SMEM DS
5.661 msec (176.6 MiB/s = 185.2 MB/s)
5.855 msec (170.8 MiB/s = 179.1 MB/s)
MEM->SMEM QS
5.685 msec (175.9 MiB/s = 184.4 MB/s)
5.867 msec (170.4 MiB/s = 178.7 MB/s)
MEM->USER
5.638 msec (177.4 MiB/s = 186.0 MB/s)
5.728 msec (174.6 MiB/s = 183.0 MB/s)
MEM->USER WS
5.596 msec (178.7 MiB/s = 187.4 MB/s)
5.734 msec (174.4 MiB/s = 182.9 MB/s)
MEM->USER DS
5.652 msec (176.9 MiB/s = 185.5 MB/s)
5.686 msec (175.9 MiB/s = 184.4 MB/s)
MEM->USER QS
5.656 msec (176.8 MiB/s = 185.4 MB/s)
5.695 msec (175.6 MiB/s = 184.1 MB/s)
SMEM->MEM
2.642 msec (378.6 MiB/s = 396.9 MB/s)
2.790 msec (358.4 MiB/s = 375.8 MB/s)
SMEM->MEM WS
2.646 msec (377.9 MiB/s = 396.2 MB/s)
2.816 msec (355.1 MiB/s = 372.3 MB/s)
SMEM->MEM DS
2.636 msec (379.3 MiB/s = 397.8 MB/s)
2.783 msec (359.4 MiB/s = 376.8 MB/s)
SMEM->MEM QS
2.657 msec (376.3 MiB/s = 394.6 MB/s)
2.762 msec (362.1 MiB/s = 379.7 MB/s)
USER->MEM
4.782 msec (209.1 MiB/s = 219.3 MB/s)
4.817 msec (207.6 MiB/s = 217.7 MB/s)
USER->MEM WS
4.762 msec (210.0 MiB/s = 220.2 MB/s)
4.803 msec (208.2 MiB/s = 218.3 MB/s)
USER->MEM DS
4.766 msec (209.8 MiB/s = 220.0 MB/s)
4.795 msec (208.6 MiB/s = 218.7 MB/s)
USER->MEM QS
4.776 msec (209.4 MiB/s = 219.6 MB/s)
4.811 msec (207.9 MiB/s = 218.0 MB/s)
USER->SMEM
4.601 msec (217.4 MiB/s = 227.9 MB/s)
4.643 msec (215.4 MiB/s = 225.9 MB/s)
USER->SMEM WS
4.511 msec (221.7 MiB/s = 232.5 MB/s)
4.605 msec (217.2 MiB/s = 227.7 MB/s)
USER->SMEM DS
4.514 msec (221.6 MiB/s = 232.3 MB/s)
4.645 msec (215.3 MiB/s = 225.8 MB/s)
USER->SMEM QS
4.511 msec (221.7 MiB/s = 232.4 MB/s)
4.642 msec (215.4 MiB/s = 225.9 MB/s)
SMEM->USER
2.364 msec (422.9 MiB/s = 443.5 MB/s)
2.480 msec (403.3 MiB/s = 422.9 MB/s)
SMEM->USER WS
2.365 msec (422.8 MiB/s = 443.3 MB/s)
2.508 msec (398.8 MiB/s = 418.2 MB/s)
SMEM->USER DS
2.374 msec (421.2 MiB/s = 441.6 MB/s)
2.460 msec (406.5 MiB/s = 426.3 MB/s)
SMEM->USER QS
2.370 msec (422.0 MiB/s = 442.5 MB/s)
2.456 msec (407.2 MiB/s = 427.0 MB/s)
DMA VME single cycle transfer
-----------------------------
MEM->A32
52.943 msec (18.9 MiB/s = 19.8 MB/s)
53.015 msec (18.9 MiB/s = 19.8 MB/s)
MEM->A32 WS
52.891 msec (18.9 MiB/s = 19.8 MB/s)
52.987 msec (18.9 MiB/s = 19.8 MB/s)
MEM->A32 QS
52.941 msec (18.9 MiB/s = 19.8 MB/s)
53.098 msec (18.8 MiB/s = 19.7 MB/s)
MEM->A32 QS
52.879 msec (18.9 MiB/s = 19.8 MB/s)
53.048 msec (18.9 MiB/s = 19.8 MB/s)
A32->MEM
144.124 msec (6.9 MiB/s = 7.3 MB/s)
144.196 msec (6.9 MiB/s = 7.3 MB/s)
A32->MEM WS
144.082 msec (6.9 MiB/s = 7.3 MB/s)
144.193 msec (6.9 MiB/s = 7.3 MB/s)
A32->MEM QS
144.073 msec (6.9 MiB/s = 7.3 MB/s)
144.214 msec (6.9 MiB/s = 7.3 MB/s)
A32->MEM QS
144.177 msec (6.9 MiB/s = 7.3 MB/s)
144.213 msec (6.9 MiB/s = 7.3 MB/s)
DMA VME BLT block transfer
--------------------------
MEM->A32
29.048 msec (34.4 MiB/s = 36.1 MB/s)
29.133 msec (34.3 MiB/s = 36.0 MB/s)
MEM->A32 WS
29.102 msec (34.4 MiB/s = 36.0 MB/s)
29.142 msec (34.3 MiB/s = 36.0 MB/s)
MEM->A32 DS
29.116 msec (34.3 MiB/s = 36.0 MB/s)
29.214 msec (34.2 MiB/s = 35.9 MB/s)
MEM->A32 QS
29.103 msec (34.4 MiB/s = 36.0 MB/s)
29.163 msec (34.3 MiB/s = 36.0 MB/s)
A32->MEM
41.598 msec (24.0 MiB/s = 25.2 MB/s)
41.702 msec (24.0 MiB/s = 25.1 MB/s)
A32->MEM WS
41.640 msec (24.0 MiB/s = 25.2 MB/s)
41.671 msec (24.0 MiB/s = 25.2 MB/s)
A32->MEM DS
41.620 msec (24.0 MiB/s = 25.2 MB/s)
41.685 msec (24.0 MiB/s = 25.2 MB/s)
A32->MEM QS
41.616 msec (24.0 MiB/s = 25.2 MB/s)
41.682 msec (24.0 MiB/s = 25.2 MB/s)
DMA VME MBLT block transfer
---------------------------
MEM->A32
16.695 msec (59.9 MiB/s = 62.8 MB/s)
16.750 msec (59.7 MiB/s = 62.6 MB/s)
MEM->A32 WS
16.693 msec (59.9 MiB/s = 62.8 MB/s)
16.746 msec (59.7 MiB/s = 62.6 MB/s)
MEM->A32 DS
16.674 msec (60.0 MiB/s = 62.9 MB/s)
16.726 msec (59.8 MiB/s = 62.7 MB/s)
MEM->A32 QS
16.696 msec (59.9 MiB/s = 62.8 MB/s)
16.739 msec (59.7 MiB/s = 62.6 MB/s)
A32->MEM
21.204 msec (47.2 MiB/s = 49.5 MB/s)
21.270 msec (47.0 MiB/s = 49.3 MB/s)
A32->MEM WS
21.207 msec (47.2 MiB/s = 49.4 MB/s)
21.276 msec (47.0 MiB/s = 49.3 MB/s)
A32->MEM DS
21.107 msec (47.4 MiB/s = 49.7 MB/s)
21.256 msec (47.0 MiB/s = 49.3 MB/s)
A32->MEM QS
21.218 msec (47.1 MiB/s = 49.4 MB/s)
21.307 msec (46.9 MiB/s = 49.2 MB/s)
DMA VME 2eVME block transfer
----------------------------
MEM->A32
11.010 msec (90.8 MiB/s = 95.2 MB/s)
11.048 msec (90.5 MiB/s = 94.9 MB/s)
MEM->A32 WS
11.011 msec (90.8 MiB/s = 95.2 MB/s)
11.052 msec (90.5 MiB/s = 94.9 MB/s)
MEM->A32 DS
10.996 msec (90.9 MiB/s = 95.4 MB/s)
11.079 msec (90.3 MiB/s = 94.6 MB/s)
MEM->A32 QS
11.013 msec (90.8 MiB/s = 95.2 MB/s)
11.055 msec (90.5 MiB/s = 94.9 MB/s)
A32->MEM
10.130 msec (98.7 MiB/s = 103.5 MB/s)
10.258 msec (97.5 MiB/s = 102.2 MB/s)
A32->MEM WS
10.146 msec (98.6 MiB/s = 103.4 MB/s)
10.279 msec (97.3 MiB/s = 102.0 MB/s)
A32->MEM DS
10.202 msec (98.0 MiB/s = 102.8 MB/s)
10.288 msec (97.2 MiB/s = 101.9 MB/s)
A32->MEM QS
10.209 msec (98.0 MiB/s = 102.7 MB/s)
10.245 msec (97.6 MiB/s = 102.3 MB/s)
DMA VME 2eVMEFast block transfer
----------------------------
MEM->A32
10.653 msec (93.9 MiB/s = 98.4 MB/s)
10.750 msec (93.0 MiB/s = 97.5 MB/s)
MEM->A32 WS
10.667 msec (93.7 MiB/s = 98.3 MB/s)
10.762 msec (92.9 MiB/s = 97.4 MB/s)
MEM->A32 DS
10.668 msec (93.7 MiB/s = 98.3 MB/s)
10.756 msec (93.0 MiB/s = 97.5 MB/s)
MEM->A32 QS
10.697 msec (93.5 MiB/s = 98.0 MB/s)
10.741 msec (93.1 MiB/s = 97.6 MB/s)
A32->MEM
9.817 msec (101.9 MiB/s = 106.8 MB/s)
9.870 msec (101.3 MiB/s = 106.2 MB/s)
A32->MEM WS
9.824 msec (101.8 MiB/s = 106.7 MB/s)
9.887 msec (101.1 MiB/s = 106.1 MB/s)
A32->MEM DS
9.813 msec (101.9 MiB/s = 106.9 MB/s)
9.856 msec (101.5 MiB/s = 106.4 MB/s)
A32->MEM QS
9.817 msec (101.9 MiB/s = 106.8 MB/s
9.899 msec (101.0 MiB/s = 105.9 MB/s)
DMA VME 2eSST160 block transfer
----------------------------
MEM->A32
10.631 msec (94.1 MiB/s = 98.6 MB/s)
10.757 msec (93.0 MiB/s = 97.5 MB/s)
MEM->A32 WS
10.689 msec (93.6 MiB/s = 98.1 MB/s)
10.798 msec (92.6 MiB/s = 97.1 MB/s)
MEM->A32 DS
10.681 msec (93.6 MiB/s = 98.2 MB/s)
10.761 msec (92.9 MiB/s = 97.4 MB/s)
MEM->A32 QS
10.684 msec (93.6 MiB/s = 98.1 MB/s)
10.724 msec (93.3 MiB/s = 97.8 MB/s)
A32->MEM
9.139 msec (109.4 MiB/s = 114.7 MB/s)
9.276 msec (107.8 MiB/s = 113.0 MB/s)
A32->MEM WS
9.198 msec (108.7 MiB/s = 114.0 MB/s)
9.250 msec (108.1 MiB/s = 113.4 MB/s)
A32->MEM DS
9.196 msec (108.7 MiB/s = 114.0 MB/s)
9.286 msec (107.7 MiB/s = 112.9 MB/s)
A32->MEM QS
9.198 msec (108.7 MiB/s = 114.0 MB/s)
9.320 msec (107.3 MiB/s = 112.5 MB/s)
DMA VME 2eSST267 block transfer
----------------------------
MEM->A32
8.624 msec (116.0 MiB/s = 121.6 MB/s)
8.719 msec (114.7 MiB/s = 120.3 MB/s)
MEM->A32 WS
8.064 msec (124.0 MiB/s = 130.0 MB/s)
8.184 msec (122.2 MiB/s = 128.1 MB/s)
MEM->A32 DS
8.100 msec (123.5 MiB/s = 129.4 MB/s)
8.228 msec (121.5 MiB/s = 127.4 MB/s)
MEM->A32 QS
8.087 msec (123.7 MiB/s = 129.7 MB/s)
8.143 msec (122.8 MiB/s = 128.8 MB/s)
A32->MEM
6.900 msec (144.9 MiB/s = 152.0 MB/s)
7.062 msec (141.6 MiB/s = 148.5 MB/s)
A32->MEM WS
6.899 msec (145.0 MiB/s = 152.0 MB/s)
6.987 msec (143.1 MiB/s = 150.1 MB/s)
A32->MEM DS
6.898 msec (145.0 MiB/s = 152.0 MB/s)
7.004 msec (142.8 MiB/s = 149.7 MB/s)
A32->MEM QS
6.896 msec (145.0 MiB/s = 152.1 MB/s)
6.982 msec (143.2 MiB/s = 150.2 MB/s)
DMA VME 2eSST320 block transfer
----------------------------
MEM->A32
7.498 msec (133.4 MiB/s = 139.8 MB/s)
7.534 msec (132.7 MiB/s = 139.2 MB/s)
MEM->A32 WS
7.495 msec (133.4 MiB/s = 139.9 MB/s)
7.547 msec (132.5 MiB/s = 138.9 MB/s)
MEM->A32 DS
7.530 msec (132.8 MiB/s = 139.2 MB/s)
7.590 msec (131.7 MiB/s = 138.1 MB/s)
MEM->A32 QS
7.502 msec (133.3 MiB/s = 139.8 MB/s)
7.582 msec (131.9 MiB/s = 138.3 MB/s)
A32->MEM
6.082 msec (164.4 MiB/s = 172.4 MB/s)
6.163 msec (162.3 MiB/s = 170.1 MB/s)
A32->MEM WS
6.085 msec (164.3 MiB/s = 172.3 MB/s)
6.195 msec (161.4 MiB/s = 169.3 MB/s)
A32->MEM DS
6.084 msec (164.4 MiB/s = 172.3 MB/s)
6.166 msec (162.2 MiB/s = 170.1 MB/s)
A32->MEM QS
6.081 msec (164.4 MiB/s = 172.4 MB/s)
6.195 msec (161.4 MiB/s = 169.3 MB/s)
Some results:
* Swapping does not cost any relevant speed, neither with nor without DMA.
* Quad word copy and double word copy have the same speed, as expeted on 32 bit hardware.
* Word/quad word access is 2/4 times as fast as byte access, as expected.
* Double word copy is as efficient as memcpy.
* Writing MEM to external is up to 16 times faster than reading external to MEM.
* MEM to MEM copy is 20 times faster than any non-DMA write, more than 500 times faster then non-DMA read and still 4 times faster than DMA.
* DMA is 4 to 5 times as fast as copy for writing but 160 times for reading.
* Access to USER is slightly slower than to SMEM
* VME access it slower than USER or SMEM access, only 2eSST320 is comparable.
* 2eSST160, 2eSST267 and 2eSST320 are 1.5 to 2 times slower than the theoretical limit.
* 2eVMEFast is only slightly faster than 2eVME and almost as fast as 2eSST160.
* Single cycle transfer VME DMA is still faster than copy.