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Index > OS Construction > Is using INVLPG a good idea?

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Japheth



Joined: 26 Oct 2004
Posts: 151
Japheth
according to Intel docs: yes, because it's faster and therefore recommended, but using INVLPG instead of "mov cr3, eax" in Jemm (a DOS EMM) is - apparently - significantly slower as soon as more than 1 TLB entry is to be flushed (on a P4).

Has anyone tested the speed benefits of INVLPG?
Post 05 Jun 2007, 06:17
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mikegonta



Joined: 20 Nov 2005
Posts: 99
mikegonta
[ Post removed by author. ]


Last edited by mikegonta on 27 Jan 2009, 21:58; edited 2 times in total
Post 06 Jun 2007, 00:30
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Japheth



Joined: 26 Oct 2004
Posts: 151
Japheth
thanks, that's what is written in the Intel docs. However, my point wasn't whether INVLPG is supposed to be faster according to the docs, but whether it is faster (or slower) in reality - as my experiences did indicate.
Post 06 Jun 2007, 05:26
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