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module Hardware
class CPU
class << self
def universal_archs
[].extend ArchitectureListExtension
end
def cpuinfo
@cpuinfo ||= File.read("/proc/cpuinfo")
end
def type
@type ||= if cpuinfo =~ /Intel|AMD/
:intel
else
:dunno
end
end
def family
return :arm if arm?
return :dunno unless intel?
# See https://software.intel.com/en-us/articles/intel-architecture-and-processor-identification-with-cpuid-model-and-family-numbers
cpu_family = cpuinfo[/^cpu family\s*: ([0-9]+)/, 1].to_i
cpu_model = cpuinfo[/^model\s*: ([0-9]+)/, 1].to_i
cpu_family_model = "0x" + ((cpu_family << 8) | cpu_model).to_s(16)
case cpu_family
when 0x06
case cpu_model
when 0x3a, 0x3e
:ivybridge
when 0x2a, 0x2d
:sandybridge
when 0x25, 0x2c, 0x2f
:westmere
when 0x1e, 0x1a, 0x2e
:nehalem
when 0x17, 0x1d
:penryn
when 0x0f, 0x16
:merom
when 0x0d
:dothan
when 0x36, 0x26, 0x1c
:atom
when 0x3c, 0x3f, 0x46
:haswell
when 0x3d, 0x47, 0x4f, 0x56
:broadwell
else
cpu_family_model
end
when 0x0f
case cpu_model
when 0x06
:presler
when 0x03, 0x04
:prescott
else
cpu_family_model
end
else
cpu_family_model
end
end
def cores
cpuinfo.scan(/^processor/).size
end
def flags
@flags ||= cpuinfo[/^flags.*/, 0].split
end
# Compatibility with Mac method, which returns lowercase symbols
# instead of strings
def features
@features ||= flags[1..-1].map(&:intern)
end
%w[aes altivec avx avx2 lm sse3 ssse3 sse4 sse4_2].each do |flag|
define_method(flag + "?") { flags.include? flag }
end
alias_method :is_64_bit?, :lm?
def bits
is_64_bit? ? 64 : 32
end
end
end
end
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