命令行查看 GPU 内存容量

有两个命令可以帮助我们查看 GPU 的内存容量，一个是 lspci，一个是 lshw

lspci

1、查找显卡的设备地址

lspci |grep VGA

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

其中 00:02.0 指明了显卡是在哪个总线、哪个插槽上的设备、上的那个功能模块。

2、查看详细信息

lspci -v -s 00:02.0

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
  Subsystem: Lenovo ThinkPad T520
  Flags: bus master, fast devsel, latency 0, IRQ 30
  Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
  Memory at e0000000 (64-bit, prefetchable) [size=256M]
  I/O ports at 5000 [size=64]
  [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
  Capabilities: <access denied>
  Kernel driver in use: i915
  Kernel modules: i915

你可以看到，GPU 可预取只有 4M，不可预取内存为 256M，果然是个垃圾显卡。

lshw

lshw -C display

*-display
     description: VGA compatible controller
     product: 2nd Generation Core Processor Family Integrated Graphics Controller
     vendor: Intel Corporation
     physical id: 2
     bus info: pci@0000:00:02.0
     version: 09
     width: 64 bits
     clock: 33MHz
     capabilities: vga_controller bus_master cap_list rom
     configuration: driver=i915 latency=0
     resources: irq:30 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:5000(size=64) memory:c0000-dffff

可以看到 resources 中 irq:30 memory:f0000000-f03fffff memory:e0000000-efffffff 前一个容量就是 4M，后一个容量就是 256M