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Difference between revisions of "Talk:Intel64-haswell"
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--[[User:Drobbins|Drobbins]] ([[User talk:Drobbins|talk]]) 22:55, May 9, 2015 (UTC) | --[[User:Drobbins|Drobbins]] ([[User talk:Drobbins|talk]]) 22:55, May 9, 2015 (UTC) | ||
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LZCNT is '''not''' listed within the flags of the XEON E5-2660 | LZCNT is '''not''' listed within the flags of the XEON E5-2660 of the server, that i rent | ||
<console> | <console> | ||
# ##i##cat /proc/cpuinfo | head -n5 | # ##i##cat /proc/cpuinfo | head -n5 | ||
Latest revision as of 18:36, May 18, 2015
Should the CPU_FLAGS suggested on this page include "lzcnt"? As listed here [1] lzcnt was adopted in Intel Haswell.
Or is there a special reason that LZCNT was not listed on this page?
[1] http://www.funtoo.org/CPU_FLAGS
LZCNT is indeed listed on the CPU_FLAGS page.
--Drobbins (talk) 22:55, May 9, 2015 (UTC)
LZCNT is not listed within the flags of the XEON E5-2660 of the server, that i rent
root # cat /proc/cpuinfo | head -n5 processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz root # cat /proc/cpuinfo | grep LZCNT | wc -l 0
I'm not sure if that information is absolutely reliable, since this is a QEMU based VPS and i don't know if the guest has full access to all the host CPU instructions. When i asked the provider about that, he answered "You have access to all instructions except for hyperthreading".
I hope, that helps a bit however.
--schentuu (talk) 18:25, May 18, 2015 (UTC)