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- Initializing array made of 33554432 64-bit words.
- Applying Sattolo's algorithm.
- Surgery on the long cycle.
- Verifying the neighboring distance...
- mindist = 335544 vs 335544
- Time to sum up the array (linear scan) 0.014 s (x 8 = 0.113 s), bandwidth = 18129.0 MB/s
- Legend:
- BandW: Implied bandwidth (assuming 64-byte cache line) in MB/s
- % Eff: Effectiness of this lane count compared to the prior, as a % of ideal
- Speedup: Speedup factor for this many lanes versus one lane
- ---------------------------------------------------------------------
- - # of lanes --- time (s) ---- BandW -- ns/hit -- % Eff -- Speedup --
- ---------------------------------------------------------------------
- 1 3.435759 596 102.4 0% 1.0
- 2 1.719435 1191 51.2 100% 2.0
- 3 1.158042 1769 34.5 98% 3.0
- 4 0.892352 2295 26.6 92% 3.9
- 5 0.738078 2775 22.0 86% 4.7
- 6 0.631674 3242 18.8 86% 5.4
- 7 0.555347 3688 16.6 85% 6.2
- 8 0.488524 4192 14.6 96% 7.0
- 9 0.439088 4664 13.1 91% 7.8
- 10 0.397669 5150 11.9 94% 8.6
- 11 0.363728 5631 10.8 94% 9.4
- 12 0.331394 6180 9.9 107% 10.4
- 13 0.322114 6358 9.6 36% 10.7
- 14 0.309458 6618 9.2 55% 11.1
- 15 0.284511 7198 8.5 121% 12.1
- 16 0.276544 7406 8.2 45% 12.4
- 17 0.275247 7441 8.2 8% 12.5
- 18 0.267224 7664 8.0 52% 12.9
- 19 0.262973 7788 7.8 30% 13.1
- 20 0.263565 7770 7.9 -5% 13.0
- 21 0.262905 7790 7.8 5% 13.1
- 22 0.257112 7965 7.7 48% 13.4
- 23 0.259424 7894 7.7 -21% 13.2
- 24 0.251654 8138 7.5 72% 13.7
- 25 0.250317 8182 7.5 13% 13.7
- 26 0.247255 8283 7.4 32% 13.9
- 27 0.252447 8113 7.5 -57% 13.6
- 28 0.252724 8104 7.5 -3% 13.6
- 29 0.244027 8393 7.3 100% 14.1
- 30 0.246696 8302 7.4 -33% 13.9
- 31 0.245589 8339 7.3 14% 14.0
- 32 0.247670 8269 7.4 -27% 13.9
- 33 0.247862 8263 7.4 -3% 13.9
- 34 0.252852 8100 7.5 -68% 13.6
- 35 0.250851 8164 7.5 28% 13.7
- 36 0.249871 8196 7.4 14% 13.8
- 37 0.255533 8015 7.6 -84% 13.4
- 38 0.253059 8093 7.5 37% 13.6
- 39 0.247555 8273 7.4 85% 13.9
- 40 0.252992 8095 7.5 -88% 13.6
- 41 0.267160 7666 8.0 -230% 12.9
- 42 0.250607 8172 7.5 260% 13.7
- 43 0.250090 8189 7.5 9% 13.7
- 44 0.273202 7496 8.1 -407% 12.6
- 45 0.253904 8066 7.6 318% 13.5
- 46 0.255868 8004 7.6 -36% 13.4
- 47 0.265732 7707 7.9 -181% 12.9
- 48 0.266073 7697 7.9 -6% 12.9
- 49 0.260862 7851 7.8 96% 13.2
- 50 0.255000 8031 7.6 112% 13.5
- 51 0.262863 7791 7.8 -157% 13.1
- 52 0.257803 7944 7.7 100% 13.3
- 53 0.261097 7844 7.8 -68% 13.2
- 54 0.258607 7919 7.7 51% 13.3
- 55 0.256659 7979 7.6 41% 13.4
- 56 0.250004 8192 7.5 145% 13.7
- 57 0.256795 7975 7.7 -155% 13.4
- 58 0.251375 8147 7.5 122% 13.7
- 59 0.254097 8060 7.6 -64% 13.5
- 60 0.248224 8251 7.4 139% 13.8
- 61 0.263657 7768 7.9 -379% 13.0
- 62 0.253868 8067 7.6 230% 13.5
- 63 0.263228 7780 7.8 -232% 13.1
- 64 0.251164 8154 7.5 293% 13.7
- 65 0.253422 8081 7.6 -58% 13.6
- 66 0.247364 8279 7.4 158% 13.9
- 67 0.257769 7945 7.7 -282% 13.3
- 68 0.255653 8011 7.6 56% 13.4
- 69 0.259591 7889 7.7 -106% 13.2
- 70 0.250793 8166 7.5 237% 13.7
- 71 0.260418 7864 7.8 -272% 13.2
- 72 0.258404 7926 7.7 56% 13.3
- 73 0.253907 8066 7.6 127% 13.5
- 74 0.253559 8077 7.6 10% 13.6
- 75 0.250170 8186 7.5 100% 13.7
- 76 0.253411 8082 7.6 -98% 13.6
- 77 0.257888 7941 7.7 -136% 13.3
- 78 0.262422 7804 7.8 -137% 13.1
- 79 0.249251 8217 7.4 397% 13.8
- 80 0.252334 8116 7.5 -99% 13.6
- 81 0.246882 8295 7.4 175% 13.9
- 82 0.247736 8267 7.4 -28% 13.9
- 83 0.257129 7965 7.7 -315% 13.4
- 84 0.250293 8182 7.5 223% 13.7
- 85 0.256117 7996 7.6 -198% 13.4
- 86 0.267090 7668 8.0 -368% 12.9
- 87 0.255807 8006 7.6 368% 13.4
- 88 0.265490 7714 7.9 -333% 12.9
- 89 0.249621 8204 7.4 532% 13.8
- 90 0.249456 8210 7.4 6% 13.8
- 91 0.251110 8156 7.5 -60% 13.7
- 92 0.255785 8007 7.6 -171% 13.4
- 93 0.251426 8146 7.5 158% 13.7
- 94 0.251126 8155 7.5 11% 13.7
- 95 0.252515 8110 7.5 -53% 13.6
- 96 0.252683 8105 7.5 -6% 13.6
- 97 0.252545 8109 7.5 5% 13.6
- 98 0.253291 8086 7.5 -29% 13.6
- 99 0.251814 8133 7.5 58% 13.6
- Maybe you have about 16 parallel paths?
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