确定Mac中终端中多个系统变量的值

Question

我在Mac上.在终端中,您如何计算出以下每个值？

• 字大小(64位与32位)
• L1/L2缓存大小
• 确定正在使用多少内存(例如df,但对于RAM)

谢谢!我知道你可以在Activity Monitor,System Profiler等中找到这些,但我正在努力提高我对终端和UNIX的了解.

Answer 1

System Profiler是一个GUI包装器/usr/sbin/system_profiler.

mress:10008 Z$ system_profiler -listDataTypes 
Available Datatypes:
SPHardwareDataType
SPNetworkDataType
SPSoftwareDataType
SPParallelATADataType
SPAudioDataType
SPBluetoothDataType
SPCardReaderDataType
SPDiagnosticsDataType
SPDiscBurningDataType
SPEthernetDataType
SPFibreChannelDataType
SPFireWireDataType
SPDisplaysDataType
SPHardwareRAIDDataType
SPMemoryDataType
SPPCIDataType
SPParallelSCSIDataType
SPPowerDataType
SPPrintersDataType
SPSASDataType
SPSerialATADataType
SPUSBDataType
SPAirPortDataType
SPFirewallDataType
SPNetworkLocationDataType
SPModemDataType
SPNetworkVolumeDataType
SPWWANDataType
SPApplicationsDataType
SPDeveloperToolsDataType
SPExtensionsDataType
SPFontsDataType
SPFrameworksDataType
SPLogsDataType
SPManagedClientDataType
SPPrefPaneDataType
SPStartupItemDataType
SPSyncServicesDataType
SPUniversalAccessDataType
mress:10009 Z$ system_profiler SPHardwareDataType
Hardware:

    Hardware Overview:

      Model Name: iMac
      Model Identifier: iMac10,1
      Processor Name: Intel Core 2 Duo
      Processor Speed: 3.33 GHz
      Number Of Processors: 1
      Total Number Of Cores: 2
      L2 Cache: 6 MB
      Memory: 16 GB
      Bus Speed: 1.33 GHz
      Boot ROM Version: IM101.00CC.B00
      SMC Version (system): 1.52f9
      Serial Number (system): QP0241DXB9S
      Hardware UUID: 01C6B9E9-B0CB-5249-8AC7-069A3E44A188

您还可以从/usr/sbin/sysctl(尝试sysctl -a)获得一些有用的信息.

mress:10014 Z$ sudo sysctl -a | grep cache
Password:
hw.cachelinesize = 64
hw.l1icachesize = 32768
hw.l1dcachesize = 32768
hw.l2cachesize = 6291456
kern.flush_cache_on_write: 0
vfs.generic.nfs.client.access_cache_timeout: 60
vfs.generic.nfs.server.reqcache_size: 64
net.inet.ip.rtmaxcache: 128
net.inet6.ip6.rtmaxcache: 128
hw.cacheconfig: 2 1 2 0 0 0 0 0 0 0
hw.cachesize: 17179869184 32768 6291456 0 0 0 0 0 0 0
hw.cachelinesize: 64
hw.l1icachesize: 32768
hw.l1dcachesize: 32768
hw.l2cachesize: 6291456
machdep.cpu.cache.linesize: 64
machdep.cpu.cache.L2_associativity: 8
machdep.cpu.cache.size: 6144