Performance Evaluation of Intel EPT Hardware Assist
Copyright © 2008-2009 VMware, Inc. All rights reserved. 1 Performance Evaluation of Intel EPT Hardware Assist Performance Evaluation of Intel EPT Hardware Assist VMware ESX builds 140815 & 136362 (internal builds) Introduction For the majority of common workloads, performance in a virtualized environment is close to that in a native environment. Virtualization does create some overheads, however.
VMware ESXã«ãŠã‘るメモリ管ç†(3) - メモリã«é–¢ã™ã‚‹ä»®æƒ³åŒ–支æ´æ©Ÿèƒ½(Intel EPT/VPID, AMD RVI/Tagged TLB) - Simple is Beautiful
(1) - åºï¼šä»–ã®ãƒªã‚½ãƒ¼ã‚¹ã¨ã®é•ã„ã¯ãªã«ï¼Ÿ (2) - 仮想化インフラã«ãŠã‘るメモリ管ç†ã£ã¦ï¼Ÿ …ã®ç¶šãã§ã™ã€‚ Shadow Page Tableを使ã£ã¦ã€Œã‚²ã‚¹ãƒˆOS上ã®ã‚¢ãƒ—リケーションã€ã®ãŸã‚ã®ä»®æƒ³ãƒ¡ãƒ¢ãƒªç©ºé–“(Logical Page Numbers / LPNs)ã¨HypervisorãŒç®¡ç†ã™ã‚‹å®Ÿãƒ¡ãƒ¢ãƒªç©ºé–“(Machine Page Numbers / MPNs)ã®ãƒšãƒ¼ã‚¸å¤‰æ›ã‚’直接的ã«ç´ã¥ã‘ã¦ã„る仕組ã¿ã‚’ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢çš„ã«å®Ÿè£…ã™ã‚‹ã¨ã¯ã©ã†ã„ã†ã“ã¨ã§ã—ょã†ã‹ï¼Ÿ メモリ管ç†ã«é–¢ã™ã‚‹ä»®æƒ³åŒ–支æ´æ©Ÿèƒ½ã«ã¯ã€Intelã®EPT (Extended Page Table)ã¨ã€AMDã®RVI (Rapid Virtual Indexing)ãŒã‚ã‚Šã¾ã™ã€‚ Intel EPTã¯ãã®åãŒç¤ºã™ã¨ãŠã‚Šã€æ‹¡å¼µã•ã‚ŒãŸãƒšãƒ¼ã‚¸ãƒ†ãƒ¼ãƒ–ルを実装ã™ã‚‹ã“ã¨ã«ã‚ˆã‚Šãƒ¡ãƒ¢ãƒªã®ãƒšãƒ¼ã‚¸ãƒ†ãƒ¼ãƒ–ル変æ›ã®å‡¦ç†æ€§èƒ½ã‚’事実上å˜ä¸€éšŽå±¤åŒ–ã™ã‚‹æŠ€è¡“ã§ã™
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http://virtualtech.jp/download/100206-39seminar06.pdf
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