如何检测windows主机的RAM和CPU

Question

我想让我的vagrantfile根据主机规格自动设置CPU和RAM。

我找到了这个片段:

 config.vm.provider "virtualbox" do |v|
      host = RbConfig::CONFIG['host_os']
      # Give VM 1/4 system memory & access to all cpu cores on the host
      if host =~ /darwin/
        cpus = `sysctl -n hw.ncpu`.to_i
        # sysctl returns Bytes and we need to convert to MB
        mem = `sysctl -n hw.memsize`.to_i / 1024 / 1024 / 4
      elsif host =~ /linux/
        cpus = `nproc`.to_i
        # meminfo shows KB and we need to convert to MB
        mem = `grep 'MemTotal' /proc/meminfo | sed -e 's/MemTotal://' -e 's/ kB//'`.to_i / 1024 / 4
      else # sorry Windows folks, I can't help you
        cpus = 2
        mem = 1024
      end
      v.customize ["modifyvm", :id, "--memory", mem]
      v.customize ["modifyvm", :id, "--cpus", cpus]
end

但是它不支持Windows(它设置默认值2和1024)。

有人知道怎么做吗?

Answer 1

我设法把它弄明白了，并把它集成到一个Git仓库中。

代码:

cpus = `wmic cpu get NumberOfCores`.split("n")[2].to_i
mem = `wmic OS get TotalVisibleMemorySize`.split("n")[2].to_i / 1024 /4

Answer 2

要将上述答案统一为一个完整的示例，您的流浪汉文件应该包含以下配置部分:

注意mem_ratio和cpu_exec_cap变量，您可以使用它们来调整分配给VM的主机RAM和CPU周期的数量。

config.vm.provider "virtualbox" do |v|
  mem_ratio = 3/4
  cpu_exec_cap = 75
  host = RbConfig::CONFIG['host_os']
  # Give VM 3/4 system memory & access to all cpu cores on the host
  if host =~ /darwin/
    cpus = `sysctl -n hw.ncpu`.to_i
    # sysctl returns Bytes and we need to convert to MB
    mem = `sysctl -n hw.memsize`.to_i / 1024^2 * mem_ratio
  elsif host =~ /linux/
    cpus = `nproc`.to_i
    # meminfo shows KB and we need to convert to MB
    mem = `grep 'MemTotal' /proc/meminfo | sed -e 's/MemTotal://' -e 's/ kB//'`.to_i / 1024 * mem_ratio
  else # Windows folks
    cpus = `wmic cpu get NumberOfCores`.split("n")[2].to_i
    mem = `wmic OS get TotalVisibleMemorySize`.split("n")[2].to_i / 1024 * mem_ratio
  end
  puts "Provisioning VM with #{cpus} CPU's (at #{cpu_exec_cap}%) and #{mem/1024} GB RAM."
  v.customize ["modifyvm", :id, "--memory", mem]
  v.customize ["modifyvm", :id, "--cpus", cpus]
  v.customize ["modifyvm", :id, "--cpuexecutioncap", cpu_exec_cap]
end

Answer 3

它在您下载的脚本中:

对不起，Windows的朋友们，我不能帮助你

else # sorry Windows folks, I can't help you
    cpus = 2
    mem = 1024
  end

所以你可以改变这些默认值但不幸的是Windows没有提供简单易用的命令来检索这些信息

现在如果你想自己做，这应该是可能的，看看wmic命令，你可以得到很多，并且通过很少的解析你应该有必要的信息-例如

C:Usersfhenri>wmic os get freephysicalmemory
FreePhysicalMemory
1564244
C:Usersfhenri>wmic.exe cpu get NumberOfCores
NumberOfCores
1

你也可以看看systeminfo这是相当冗长的和特定于地区的所以可能更难解析