RFR: 8266951: Partial in-lining for vectorized mismatch operation using AVX512 masked instructions

Jatin Bhateja jbhateja at openjdk.java.net
Wed May 12 17:16:04 UTC 2021 

ArraySupport.vectorizedMismatch is a leaf level comparison routine which gets called by various public Java APIs (Arrays.equals, Arrays.mismatch). Hotspot C2 compiler intrinsifies vectorizedMismatch routine and emits a call to a stub routine which uses vector instruction to compare the inputs.

For small compare operation whose size fits in one vector register i.e. < 32 bytes or <= 64 bytes, this patch employ partial in-lining technique to emit the fast path code at the call site which does vector comparison under the influence of a predicate register/mask computed as a function of comparison length.

If the length of comparison is greater than the vector register size then the slow path comprising of stub call is emitted.

This prevents the call overhead associated with stub call which is significant compared to actual comparison operation for small sized comparisons.

Partial in-lining works under the influence of a run time flag -XX:UsePartialInlineSize=32/64 (default 32 bytes).

Following are performance number for an existing JMH benchmark (test/micro/org/openjdk/bench/java/util//ArrayMismatch.java) :-

Machine : Cascade Lake server (Intel(R) Xeon(R) Platinum 8280 CPU @ 2.70GHz)

JMH   Benchmark | Size | BaseLine (ops/ms) | PI32 (ops/ms) | Gain (PI32/Baseline) | PI64 (ops/ms) | Gain (PI64/Baseline)
-- | -- | -- | -- | -- | -- | --
  |   |   |   |   |   |  
ArraysMismatch.Byte.differentSubrangeMatches | 16 | 129196.612 | 165376.715 | 1.2800391 | 157553.42 | 1.219485694
ArraysMismatch.Byte.differentSubrangeMatches | 32 | 125583.404 | 163645.759 | 1.303084275 | 157645.879 | 1.255308217
ArraysMismatch.Byte.differentSubrangeMatches | 64 | 121969.731 | 170648.152 | 1.399102471 | 157993.449 | 1.295349655
ArraysMismatch.Byte.differentSubrangeMatches | 90 | 91819.571 | 96154.479 | 1.047211155 | 157983.324 | 1.720584427
ArraysMismatch.Byte.differentSubrangeMatches | 800 | 65236.047 | 67243.131 | 1.030766487 | 67759.48 | 1.038681574
ArraysMismatch.Byte.matches | 16 | 151805.68 | 203802.717 | 1.342523659 | 188334.618 | 1.240629586
ArraysMismatch.Byte.matches | 32 | 151624.747 | 203731.315 | 1.343654773 | 185719.086 | 1.224859989
ArraysMismatch.Byte.matches | 64 | 138350.648 | 124158.139 | 0.897416389 | 188935.388 | 1.365627055
ArraysMismatch.Byte.matches | 90 | 102366.983 | 101474.688 | 0.991283371 | 100674.414 | 0.983465675
ArraysMismatch.Byte.matches | 800 | 46319.352 | 49585.514 | 1.070513983 | 49594.262 | 1.070702846
ArraysMismatch.Byte.mismatchEnd | 16 | 162382.057 | 191602.366 | 1.179947893 | 182425.362 | 1.123433003
ArraysMismatch.Byte.mismatchEnd | 32 | 146656.702 | 193510.637 | 1.319480354 | 182571.741 | 1.244891904
ArraysMismatch.Byte.mismatchEnd | 64 | 140799.385 | 122505.816 | 0.870073516 | 182360.435 | 1.295179201
ArraysMismatch.Byte.mismatchEnd | 90 | 117439.002 | 107296.27 | 0.913634041 | 108081.174 | 0.920317545
ArraysMismatch.Byte.mismatchEnd | 800 | 47542.975 | 47456.106 | 0.998172832 | 47289.082 | 0.994659716
ArraysMismatch.Byte.mismatchMid | 16 | 143112.591 | 189653.41 | 1.325204223 | 182411.81 | 1.274603504
ArraysMismatch.Byte.mismatchMid | 32 | 151759.608 | 193712.64 | 1.276443993 | 182689.18 | 1.203806351
ArraysMismatch.Byte.mismatchMid | 64 | 140756.035 | 122017.013 | 0.866868785 | 182508.473 | 1.296629825
ArraysMismatch.Byte.mismatchMid | 90 | 134230.235 | 122213.804 | 0.910478954 | 122566.133 | 0.913103765
ArraysMismatch.Byte.mismatchMid | 800 | 75512.985 | 64861.716 | 0.858947849 | 71607.794 | 0.94828451
ArraysMismatch.Byte.mismatchStart | 16 | 160628.501 | 193722.299 | 1.206026937 | 183190.972 | 1.140463684
ArraysMismatch.Byte.mismatchStart | 32 | 151629.56 | 193633.36 | 1.277015906 | 183230.666 | 1.20840993
ArraysMismatch.Byte.mismatchStart | 64 | 143345.272 | 130754.305 | 0.91216336 | 181837.864 | 1.268530601
ArraysMismatch.Byte.mismatchStart | 90 | 151557.205 | 130724.926 | 0.86254511 | 130962.682 | 0.864113864
ArraysMismatch.Byte.mismatchStart | 800 | 149416.06 | 130847.301 | 0.875724477 | 130952.683 | 0.876429769
ArraysMismatch.Char.differentSubrangeMatches | 16 | 124936.905 | 152375.103 | 1.219616438 | 146062.997 | 1.169094088
ArraysMismatch.Char.differentSubrangeMatches | 32 | 118878.291 | 158770.285 | 1.33557005 | 146561.488 | 1.232870079
ArraysMismatch.Char.differentSubrangeMatches | 64 | 110296.975 | 104885.041 | 0.95093307 | 146102.313 | 1.324626655
ArraysMismatch.Char.differentSubrangeMatches | 90 | 88056.395 | 90133.489 | 1.023588224 | 87883.169 | 0.998032783
ArraysMismatch.Char.differentSubrangeMatches | 800 | 41319.787 | 46257.464 | 1.119499091 | 46090.56 | 1.115459767
ArraysMismatch.Char.matches | 16 | 150428.182 | 197311.356 | 1.311664832 | 187199.805 | 1.24444637
ArraysMismatch.Char.matches | 32 | 132718.181 | 126373.231 | 0.952192307 | 187008.811 | 1.409067014
ArraysMismatch.Char.matches | 64 | 111659.84 | 107182.982 | 0.959906283 | 109772.951 | 0.983101453
ArraysMismatch.Char.matches | 90 | 86184.209 | 91977.05 | 1.067214645 | 90389.147 | 1.048790121
ArraysMismatch.Char.matches | 800 | 26332.084 | 25284.001 | 0.960197491 | 25855.38 | 0.981896458
ArraysMismatch.Char.mismatchEnd | 16 | 148547.251 | 189151.018 | 1.273339067 | 179675.328 | 1.209550004
ArraysMismatch.Char.mismatchEnd | 32 | 138219.785 | 119017.203 | 0.861072118 | 178701.685 | 1.292880647
ArraysMismatch.Char.mismatchEnd | 64 | 110435.452 | 103940.023 | 0.94118348 | 102078.889 | 0.924330794
ArraysMismatch.Char.mismatchEnd | 90 | 89375.63 | 87698.736 | 0.981237682 | 88037.787 | 0.985031233
ArraysMismatch.Char.mismatchEnd | 800 | 23632.584 | 22963.757 | 0.971698948 | 20497.605 | 0.867345061
ArraysMismatch.Char.mismatchMid | 16 | 148666.26 | 189258.721 | 1.273044207 | 178820.938 | 1.202834712
ArraysMismatch.Char.mismatchMid | 32 | 131949.59 | 119320.489 | 0.904288441 | 178579.245 | 1.35338992
ArraysMismatch.Char.mismatchMid | 64 | 122148.315 | 111033.597 | 0.909006375 | 109455.953 | 0.896090568
ArraysMismatch.Char.mismatchMid | 90 | 125032.714 | 109837.581 | 0.878470742 | 110283.097 | 0.882033937
ArraysMismatch.Char.mismatchMid | 800 | 42255.059 | 48153.688 | 1.139595806 | 43087.476 | 1.019699819
ArraysMismatch.Char.mismatchStart | 16 | 148493.976 | 189247.176 | 1.274443456 | 178915.503 | 1.204867078
ArraysMismatch.Char.mismatchStart | 32 | 148724.462 | 126724.721 | 0.852077186 | 178887.041 | 1.202808459
ArraysMismatch.Char.mismatchStart | 64 | 148635.338 | 126716.274 | 0.852531274 | 126747.94 | 0.852744318
ArraysMismatch.Char.mismatchStart | 90 | 140359.351 | 126708.588 | 0.902744186 | 125618.245 | 0.894975961
ArraysMismatch.Char.mismatchStart | 800 | 144649.46 | 125727.381 | 0.86918666 | 126664.011 | 0.875661831
ArraysMismatch.Double.differentSubrangeMatches | 16 | 116255.827 | 116156.952 | 0.999149505 | 116557.568 | 1.002595491
ArraysMismatch.Double.differentSubrangeMatches | 32 | 91940.498 | 97299.205 | 1.058284511 | 97466.224 | 1.06010111
ArraysMismatch.Double.differentSubrangeMatches | 64 | 78205.807 | 78189.378 | 0.999789926 | 78133.649 | 0.999077332
ArraysMismatch.Double.differentSubrangeMatches | 90 | 61330.454 | 68798.235 | 1.121763015 | 68524.188 | 1.117294648
ArraysMismatch.Double.differentSubrangeMatches | 800 | 14996.315 | 14979.647 | 0.998888527 | 15072.825 | 1.00510192
ArraysMismatch.Double.matches | 16 | 119342.024 | 120322.671 | 1.008217114 | 119531.315 | 1.001586122
ArraysMismatch.Double.matches | 32 | 88179.448 | 89069.505 | 1.010093701 | 88141.626 | 0.999571079
ArraysMismatch.Double.matches | 64 | 62622.253 | 62433.512 | 0.996986039 | 63041.774 | 1.006699232
ArraysMismatch.Double.matches | 90 | 49579.305 | 50632.739 | 1.021247454 | 46548.486 | 0.938869272
ArraysMismatch.Double.matches | 800 | 8850.013 | 8505.296 | 0.961048984 | 8490.327 | 0.959357574
ArraysMismatch.Double.mismatchEnd | 16 | 116594.224 | 119025.382 | 1.020851445 | 116310.567 | 0.997567144
ArraysMismatch.Double.mismatchEnd | 32 | 86183.542 | 86814.706 | 1.007323486 | 86258.696 | 1.000872023
ArraysMismatch.Double.mismatchEnd | 64 | 62695.058 | 62794.552 | 1.001586951 | 62769 | 1.001179391
ArraysMismatch.Double.mismatchEnd | 90 | 46899.021 | 47692.984 | 1.016929202 | 47598.715 | 1.01491916
ArraysMismatch.Double.mismatchEnd | 800 | 8132.64 | 8141.465 | 1.001085133 | 7176.583 | 0.882441987
ArraysMismatch.Double.mismatchMid | 16 | 110505.284 | 113732.521 | 1.029204368 | 113249.451 | 1.024832903
ArraysMismatch.Double.mismatchMid | 32 | 94259.439 | 93242.776 | 0.989214205 | 94420.206 | 1.00170558
ArraysMismatch.Double.mismatchMid | 64 | 76392.603 | 76344.962 | 0.999376366 | 76369.689 | 0.999700049
ArraysMismatch.Double.mismatchMid | 90 | 71578.538 | 71637.235 | 1.000820036 | 71582.34 | 1.000053116
ArraysMismatch.Double.mismatchMid | 800 | 14993.414 | 12701.251 | 0.84712201 | 14998.937 | 1.000368362
ArraysMismatch.Double.mismatchStart | 16 | 141188.616 | 141430.91 | 1.001716102 | 141517.873 | 1.002332036
ArraysMismatch.Double.mismatchStart | 32 | 141489.906 | 139633.297 | 0.986878152 | 141729.555 | 1.001693753
ArraysMismatch.Double.mismatchStart | 64 | 141502.44 | 139656.902 | 0.986957554 | 141488.272 | 0.999899875
ArraysMismatch.Double.mismatchStart | 90 | 141782.57 | 141508.142 | 0.998064445 | 141579.135 | 0.998565162
ArraysMismatch.Double.mismatchStart | 800 | 144565.191 | 139525.413 | 0.965138371 | 144607.95 | 1.000295777
ArraysMismatch.Float.differentSubrangeMatches | 16 | 120041.868 | 119986.512 | 0.999538861 | 120009.683 | 0.999731885
ArraysMismatch.Float.differentSubrangeMatches | 32 | 111402.873 | 111414.633 | 1.000105563 | 111442.964 | 1.000359874
ArraysMismatch.Float.differentSubrangeMatches | 64 | 85388.728 | 93884.13 | 1.099490907 | 95120.892 | 1.113974809
ArraysMismatch.Float.differentSubrangeMatches | 90 | 67617.865 | 75865.226 | 1.121970148 | 76179.814 | 1.126622587
ArraysMismatch.Float.differentSubrangeMatches | 800 | 24994.376 | 25011.775 | 1.000696117 | 24944.2 | 0.997992508
ArraysMismatch.Float.matches | 16 | 133159.39 | 137937.688 | 1.035884048 | 139461.652 | 1.047328709
ArraysMismatch.Float.matches | 32 | 111959.987 | 115420.6 | 1.030909373 | 117002.141 | 1.045035321
ArraysMismatch.Float.matches | 64 | 86892.65 | 87395.62 | 1.005788407 | 87345.458 | 1.00521112
ArraysMismatch.Float.matches | 90 | 67690.279 | 69156.772 | 1.02166475 | 69082.962 | 1.020574343
ArraysMismatch.Float.matches | 800 | 14894.94 | 15341.034 | 1.029949365 | 15779.117 | 1.059360897
ArraysMismatch.Float.mismatchEnd | 16 | 128854.048 | 128925.913 | 1.000557724 | 128985.299 | 1.001018602
ArraysMismatch.Float.mismatchEnd | 32 | 99825.842 | 104613.873 | 1.047963843 | 103876.271 | 1.040574955
ArraysMismatch.Float.mismatchEnd | 64 | 80190.706 | 84665.053 | 1.055796329 | 84582.712 | 1.054769514
ArraysMismatch.Float.mismatchEnd | 90 | 71406.594 | 76730.083 | 1.074551784 | 76596.258 | 1.072677658
ArraysMismatch.Float.mismatchEnd | 800 | 14348.159 | 14306.535 | 0.997099001 | 14360.603 | 1.000867289
ArraysMismatch.Float.mismatchMid | 16 | 123753.791 | 124291.601 | 1.004345806 | 123649.378 | 0.999156284
ArraysMismatch.Float.mismatchMid | 32 | 109105.215 | 111447.183 | 1.021465225 | 111494.37 | 1.021897716
ArraysMismatch.Float.mismatchMid | 64 | 93600.363 | 93741.993 | 1.001513135 | 93658.042 | 1.000616226
ArraysMismatch.Float.mismatchMid | 90 | 89991.128 | 89712.471 | 0.996903506 | 90031.763 | 1.000451545
ArraysMismatch.Float.mismatchMid | 800 | 23974.331 | 24301.075 | 1.01362891 | 24354.29 | 1.015848576
ArraysMismatch.Float.mismatchStart | 16 | 140889.393 | 140535.617 | 0.997488981 | 140222.656 | 0.995267657
ArraysMismatch.Float.mismatchStart | 32 | 140871.915 | 140318.765 | 0.996073383 | 140242.783 | 0.995534014
ArraysMismatch.Float.mismatchStart | 64 | 141197.313 | 140413.639 | 0.994449795 | 140792.879 | 0.997135682
ArraysMismatch.Float.mismatchStart | 90 | 139663.079 | 139775.065 | 1.00080183 | 143880.133 | 1.03019448
ArraysMismatch.Float.mismatchStart | 800 | 143930.882 | 143878.412 | 0.99963545 | 143923.022 | 0.99994539
ArraysMismatch.Int.differentSubrangeMatches | 16 | 110820.026 | 130943.67 | 1.181588515 | 131076.904 | 1.182790771
ArraysMismatch.Int.differentSubrangeMatches | 32 | 111706.868 | 121119.544 | 1.084262285 | 122049.921 | 1.092591021
ArraysMismatch.Int.differentSubrangeMatches | 64 | 93916.026 | 101624.789 | 1.082081444 | 100103.617 | 1.065884293
ArraysMismatch.Int.differentSubrangeMatches | 90 | 67478.955 | 83517.957 | 1.237688951 | 83549.562 | 1.238157319
ArraysMismatch.Int.differentSubrangeMatches | 800 | 24920.868 | 25100.838 | 1.007221659 | 25376.679 | 1.018290334
ArraysMismatch.Int.matches | 16 | 138004.078 | 142579.711 | 1.033155781 | 143465.516 | 1.039574468
ArraysMismatch.Int.matches | 32 | 111790.949 | 119018.169 | 1.06464942 | 119864.971 | 1.072224291
ArraysMismatch.Int.matches | 64 | 86997.004 | 88476.088 | 1.017001551 | 87755.688 | 1.008720806
ArraysMismatch.Int.matches | 90 | 69366.581 | 71427.315 | 1.029707879 | 71203.035 | 1.026474622
ArraysMismatch.Int.matches | 800 | 15119.02 | 15529.095 | 1.02712312 | 15828.336 | 1.046915475
ArraysMismatch.Int.mismatchEnd | 16 | 139862.143 | 135639.435 | 0.96980807 | 135661.244 | 0.969964002
ArraysMismatch.Int.mismatchEnd | 32 | 114870.328 | 115455.901 | 1.005097687 | 114992.965 | 1.001067613
ArraysMismatch.Int.mismatchEnd | 64 | 85291.637 | 85115.665 | 0.99793682 | 85179.114 | 0.998680726
ArraysMismatch.Int.mismatchEnd | 90 | 73049.868 | 78798.949 | 1.078700772 | 73365.106 | 1.004315381
ArraysMismatch.Int.mismatchEnd | 800 | 14597.509 | 12861.87 | 0.88110033 | 12845.178 | 0.879956847
ArraysMismatch.Int.mismatchMid | 16 | 131615.489 | 134691.219 | 1.023369058 | 134503.225 | 1.0219407
ArraysMismatch.Int.mismatchMid | 32 | 119291.19 | 121970.431 | 1.022459672 | 120647.357 | 1.011368543
ArraysMismatch.Int.mismatchMid | 64 | 100133.019 | 99827.03 | 0.996944175 | 98327.743 | 0.981971222
ArraysMismatch.Int.mismatchMid | 90 | 93062.689 | 95269.725 | 1.023715584 | 95457.632 | 1.025734728
ArraysMismatch.Int.mismatchMid | 800 | 24614.985 | 20853.102 | 0.847171022 | 20857.528 | 0.847350831
ArraysMismatch.Int.mismatchStart | 16 | 140229.222 | 147607.561 | 1.052616273 | 146278.15 | 1.043136002
ArraysMismatch.Int.mismatchStart | 32 | 140354.53 | 147448.421 | 1.050542658 | 146287.931 | 1.042274382
ArraysMismatch.Int.mismatchStart | 64 | 140256.12 | 147353.466 | 1.050602754 | 146094.059 | 1.041623417
ArraysMismatch.Int.mismatchStart | 90 | 135753.229 | 151205.439 | 1.113825727 | 152070.776 | 1.120200065
ArraysMismatch.Int.mismatchStart | 800 | 151565.887 | 145991.819 | 0.963223466 | 152020.842 | 1.003001698
ArraysMismatch.Long.differentSubrangeMatches | 16 | 125569.009 | 121469.175 | 0.967349953 | 121319.155 | 0.966155232
ArraysMismatch.Long.differentSubrangeMatches | 32 | 100126.557 | 103303.047 | 1.03172475 | 101476.788 | 1.013485243
ArraysMismatch.Long.differentSubrangeMatches | 64 | 80870.342 | 82334.336 | 1.018102978 | 82395.962 | 1.018865012
ArraysMismatch.Long.differentSubrangeMatches | 90 | 70673.831 | 72440.193 | 1.024993155 | 72067.497 | 1.019719689
ArraysMismatch.Long.differentSubrangeMatches | 800 | 15224.864 | 15077.429 | 0.99031617 | 15163.827 | 0.995990966
ArraysMismatch.Long.matches | 16 | 119857.871 | 123784.673 | 1.032762154 | 122968.267 | 1.025950703
ArraysMismatch.Long.matches | 32 | 88284.162 | 90825.719 | 1.028788369 | 91303.549 | 1.034200778
ArraysMismatch.Long.matches | 64 | 62827.102 | 63614.876 | 1.012538761 | 64469.82 | 1.026146646
ArraysMismatch.Long.matches | 90 | 49351.299 | 51199.947 | 1.037458953 | 51103.813 | 1.035511
ArraysMismatch.Long.matches | 800 | 8822.867 | 8512.064 | 0.964773015 | 8848.35 | 1.00288829
ArraysMismatch.Long.mismatchEnd | 16 | 124902.804 | 128237.911 | 1.026701618 | 128410.897 | 1.028086583
ArraysMismatch.Long.mismatchEnd | 32 | 86728.545 | 90519.608 | 1.043711825 | 88782.445 | 1.023681938
ArraysMismatch.Long.mismatchEnd | 64 | 64431.36 | 62735.702 | 0.973682722 | 64766.52 | 1.005201815
ArraysMismatch.Long.mismatchEnd | 90 | 47764.996 | 47635.982 | 0.997298984 | 47562.461 | 0.995759761
ArraysMismatch.Long.mismatchEnd | 800 | 8124.901 | 7194.444 | 0.88548082 | 7197.163 | 0.88581547
ArraysMismatch.Long.mismatchMid | 16 | 122857.442 | 121708.317 | 0.99064668 | 121071.994 | 0.985467319
ArraysMismatch.Long.mismatchMid | 32 | 99406.603 | 99376.972 | 0.999701921 | 97379.046 | 0.979603397
ArraysMismatch.Long.mismatchMid | 64 | 78596.148 | 76559.205 | 0.974083425 | 76538.811 | 0.973823946
ArraysMismatch.Long.mismatchMid | 90 | 74253.699 | 73267.252 | 0.98671518 | 74874.856 | 1.008365334
ArraysMismatch.Long.mismatchMid | 800 | 12739.526 | 12773.563 | 1.002671763 | 15215.721 | 1.194371046
ArraysMismatch.Long.mismatchStart | 16 | 143429.003 | 147610.51 | 1.029153846 | 146953.182 | 1.024570895
ArraysMismatch.Long.mismatchStart | 32 | 149771.413 | 149898.955 | 1.000851578 | 147743.864 | 0.986462377
ArraysMismatch.Long.mismatchStart | 64 | 149812.094 | 147738.977 | 0.986161885 | 147818.236 | 0.986690941
ArraysMismatch.Long.mismatchStart | 90 | 149834.855 | 147878.978 | 0.986946448 | 149768.864 | 0.999559575
ArraysMismatch.Long.mismatchStart | 800 | 150266.332 | 147175.353 | 0.979429996 | 153305.049 | 1.020222208
ArraysMismatch.Short.differentSubrangeMatches | 16 | 124956.808 | 152398.079 | 1.21960605 | 146222.898 | 1.170187526
ArraysMismatch.Short.differentSubrangeMatches | 32 | 118644.114 | 158832.405 | 1.338729749 | 146589.485 | 1.235539464
ArraysMismatch.Short.differentSubrangeMatches | 64 | 111036.197 | 106078.375 | 0.955349497 | 146122.18 | 1.315986894
ArraysMismatch.Short.differentSubrangeMatches | 90 | 79114.347 | 90244.347 | 1.140682448 | 91059.171 | 1.150981768
ArraysMismatch.Short.differentSubrangeMatches | 800 | 44794.065 | 46302.944 | 1.033684797 | 46086.671 | 1.028856635
ArraysMismatch.Short.matches | 16 | 150201.123 | 193264.21 | 1.28670283 | 185129.029 | 1.232540911
ArraysMismatch.Short.matches | 32 | 137672.122 | 126543.04 | 0.919162414 | 187187.586 | 1.359662242
ArraysMismatch.Short.matches | 64 | 113952.11 | 110124.025 | 0.966406195 | 109228.551 | 0.958547858
ArraysMismatch.Short.matches | 90 | 89491.351 | 91045.251 | 1.017363689 | 90362.175 | 1.009730817
ArraysMismatch.Short.matches | 800 | 25941.449 | 25887.28 | 0.997911875 | 25191.983 | 0.971109324
ArraysMismatch.Short.mismatchEnd | 16 | 142494.648 | 189203.368 | 1.327792802 | 176318.454 | 1.237368957
ArraysMismatch.Short.mismatchEnd | 32 | 139928.97 | 119098.052 | 0.851132199 | 178840.438 | 1.278080143
ArraysMismatch.Short.mismatchEnd | 64 | 115583.3 | 104264.811 | 0.902075049 | 102376.369 | 0.885736685
ArraysMismatch.Short.mismatchEnd | 90 | 86641.922 | 87669.462 | 1.011859617 | 87745.796 | 1.012740645
ArraysMismatch.Short.mismatchEnd | 800 | 23741.295 | 22911.558 | 0.965050895 | 22937.297 | 0.96613504
ArraysMismatch.Short.mismatchMid | 16 | 148684.747 | 189160.851 | 1.272227682 | 178776.065 | 1.202383355
ArraysMismatch.Short.mismatchMid | 32 | 133281.625 | 118690.88 | 0.890526957 | 178478.46 | 1.339107773
ArraysMismatch.Short.mismatchMid | 64 | 122399.072 | 110333.504 | 0.901424351 | 111504.705 | 0.910993059
ArraysMismatch.Short.mismatchMid | 90 | 119317.633 | 110483.29 | 0.925959451 | 111346.724 | 0.933195884
ArraysMismatch.Short.mismatchMid | 800 | 50742.831 | 43058.305 | 0.848559376 | 47917.118 | 0.94431306
ArraysMismatch.Short.mismatchStart | 16 | 148861.935 | 191984.933 | 1.289684519 | 178706.176 | 1.200482689
ArraysMismatch.Short.mismatchStart | 32 | 148701.043 | 126690.118 | 0.851978678 | 178702.06 | 1.201753911
ArraysMismatch.Short.mismatchStart | 64 | 148560.877 | 126747.337 | 0.853167668 | 126657.473 | 0.852562771
ArraysMismatch.Short.mismatchStart | 90 | 149824.411 | 126605.818 | 0.845027971 | 125719.231 | 0.839110464
ArraysMismatch.Short.mismatchStart | 800 | 152583.036 | 126437.329 | 0.828646043 | 126698.741 | 0.830359287

-------------

Commit messages:
 - 8266951: Partial in-lining for vectorized mismatch operation using AVX512 masked instructions

Changes: https://git.openjdk.java.net/jdk/pull/3999/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3999&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266951
  Stats: 462 lines in 18 files changed: 198 ins; 124 del; 140 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3999.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3999/head:pull/3999

PR: https://git.openjdk.java.net/jdk/pull/3999

More information about the hotspot-compiler-dev mailing list