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137 lines
1.6 KiB
Plaintext
137 lines
1.6 KiB
Plaintext
// Module included in the following assemblies:
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// * virt/nodes/virt-managing-node-labeling-obsolete-cpu-models.adoc
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:_mod-docs-content-type: CONCEPT
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[id="virt-about-node-labeling-cpu-features_{context}"]
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= About node labeling for CPU features
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Through the process of iteration, the base CPU features in the minimum CPU model are eliminated from the list of labels generated for the node.
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For example:
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* An environment might have two supported CPU models: `Penryn` and `Haswell`.
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* If `Penryn` is specified as the CPU model for `minCPU`, each base CPU feature for `Penryn` is compared to the list of CPU features supported by `Haswell`.
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+
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.CPU features supported by `Penryn`
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[%collapsible]
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====
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----
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apic
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clflush
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cmov
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cx16
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cx8
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de
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fpu
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fxsr
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lahf_lm
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lm
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mca
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mce
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mmx
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msr
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mtrr
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nx
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pae
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pat
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pge
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pni
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pse
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pse36
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sep
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sse
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sse2
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sse4.1
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ssse3
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syscall
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tsc
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----
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====
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+
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.CPU features supported by `Haswell`
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[%collapsible]
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====
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----
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aes
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apic
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avx
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avx2
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bmi1
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bmi2
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clflush
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cmov
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cx16
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cx8
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de
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erms
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fma
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fpu
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fsgsbase
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fxsr
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hle
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invpcid
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lahf_lm
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lm
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mca
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mce
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mmx
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movbe
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msr
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mtrr
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nx
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pae
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pat
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pcid
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pclmuldq
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pge
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pni
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popcnt
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pse
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pse36
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rdtscp
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rtm
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sep
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smep
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sse
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sse2
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sse4.1
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sse4.2
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ssse3
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syscall
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tsc
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tsc-deadline
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x2apic
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xsave
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----
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====
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* If both `Penryn` and `Haswell` support a specific CPU feature, a label is not created for that feature. Labels are generated for CPU features that are supported only by `Haswell` and not by `Penryn`.
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+
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.Node labels created for CPU features after iteration
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[%collapsible]
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====
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----
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aes
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avx
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avx2
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bmi1
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bmi2
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erms
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fma
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fsgsbase
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hle
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invpcid
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movbe
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pcid
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pclmuldq
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popcnt
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rdtscp
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rtm
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sse4.2
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tsc-deadline
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x2apic
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xsave
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----
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====
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