[lkml]   [2014]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 3/6] x86: Add support for the clwb instruction
On Tue, Nov 11, 2014 at 12:48:52PM -0700, Ross Zwisler wrote:
> Essentially we need one additional byte at the beginning of the clflush so
> that we can flip it into a clflushopt by changing that byte into a 0x66
> prefix. Two options are to either insert a 1 byte ASM_NOP1, or to add a 1
> byte NOP_DS_PREFIX. Both have no functional effect with the plain clflush,
> but I've been told that executing a clflush + prefix should be faster than
> executing a clflush + NOP.

I see. :)



Sent from a fat crate under my desk. Formatting is fine.

 \ /
  Last update: 2014-11-11 21:21    [W:0.056 / U:6.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site