linux下怎么查看当前pci总线频率

kentzhou

lspci的输出有66Mhz, 但是lspci的源代码里写的是：
#define  PCI_STATUS_66MHZ       0x20    /* Support 66 Mhz PCI 2.1 bus */
是支持的能力还是当前状态呢？

[ 本帖最后由 kentzhou 于 2009-8-14 10:20 编辑 ]

kentzhou

The answer is it is the capability.
After google the solution, I found that for x86 pc archtecture with bios, it's better to use demicode or hwinfo which is said will present the bus speed for both pci and pcie. lspci can only show pci bus speed.
But for the mips architecture, there is no good way to show the bus speed. So I have to read the specific register settings and use oscilloscope to check the clock pin. In both 33Mhz clock and 66Mhz clock, the lspci show 66Mhz+ always.