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RandomX: optimized loading from scratchpad

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Prefetches scratchpad data as soon as possible to calculate data address for the next load.

Up to ~1.4% speedup on Ryzen 7 3700X @ 4.1 GHz, RAM 3200 MHz 14-14-14-28 with optimized sub-timings:
Variant|Before H/S|After H/S
-------|----------|---------
rx/0|8663|8777
rx/wow|9867|10009
rx/loki|8652|8731
This commit is contained in:
SChernykh 2019-09-11 19:10:01 +02:00
parent 01b2c952ea
commit 2322e3bcf7
9 changed files with 75 additions and 21 deletions
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2
src/crypto/randomx/randomx.h
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@ -116,7 +116,7 @@ struct RandomX_ConfigurationBase
uint8_t codeShhPrefetchTweaked[20];
uint8_t codeReadDatasetTweaked[64];
uint8_t codeReadDatasetLightSshInitTweaked[68];
uint8_t codeLoopLoadTweaked[140];
uint8_t codePrefetchScratchpadTweaked[32];
uint32_t CacheLineAlignMask_Calculated;
uint32_t DatasetExtraItems_Calculated;