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Accurately get hardware cpu count in Vagrantfile.

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In Vagrantfile replace hack that assumed hyper threading was enabled on
the host and divided ncpu by 2 with methods of getting the actual
hardware core count.
This commit is contained in:
BenTheElder 2015-05-09 19:21:58 -04:00
parent 738f403eea
commit 19224deb04
1 changed files with 7 additions and 5 deletions
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12
Vagrantfile vendored
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@ -70,14 +70,16 @@ $kube_provider_boxes = {
}
}
# This stuff is cargo-culted from http://www.stefanwrobel.com/how-to-make-vagrant-performance-not-suck
# Give access to half of all cpu cores on the host. We divide by 2 as we assume
# that users are running with hyperthreads.
# Give access to all physical cpu cores
# Previously cargo-culted from here:
# http://www.stefanwrobel.com/how-to-make-vagrant-performance-not-suck
# Rewritten to actually determine the number of hardware cores instead of assuming
# that the host has hyperthreading enabled.
host = RbConfig::CONFIG['host_os']
if host =~ /darwin/
$vm_cpus = (`sysctl -n hw.ncpu`.to_i/2.0).ceil
$vm_cpus = `sysctl -n hw.physicalcpu`.to_i
elsif host =~ /linux/
$vm_cpus = (`nproc`.to_i/2.0).ceil
$vm_cpus = `cat /proc/cpuinfo | grep 'core id' | wc -l`.to_i
else # sorry Windows folks, I can't help you
$vm_cpus = 2
end