疑问：linux怎样下怎么查看当前pci总线频率

疑问：linux怎样下怎么查看当前pci总线频率

用 lshw 命令即可看到各种硬件参数。比如，我的电脑用这个命令返回的内容中包括：
*-pci:0
description: PCI bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 35
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:1000(size=4096) memory:91100000-911fffff
*-network DISABLED
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0
version: 15
serial: 30:65:ec:a3:e2:f3
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:308 ioport:1000(size=256) memory:91104000-91104fff memory:91100000-91103fff
*-pci:1
description: PCI bridge
product: Intel Corporation
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: 35
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 memory:91000000-910fffff
*-network
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
serial: c8:ff:28:48:04:ed
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.4.0-51-generic firmware=N/A ip=192.168.43.133 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:91000000-9107ffff memory:91080000-9108ffff

这个片段中我们可用看到我的电脑有两个PCI总线（PCI:0和PCI:1），其中“clock: 33MHz”表明总线频率位33兆。