Matthias Drochner <m.droch...@fz-juelich.de> wrote: > > Link Capabilities Ragister (0xAC): 0x00027482 > > bits 3:0 Supprted Link speed: 0010 = 5 GbE and 2.5 GbE speed > > supported bits 9:4 Max link width: 001000 = x4 > > Wrong -- this means x8. > > > bits 14:12 L0s exit lattency: 101 = 1 µs - 2 µs > > bits 17:15 L1 Exit lattency: 011 = 4 µs - 8 µs > > > > Link Status Register (0xB2): 0x1081 > > bits 3:0 Current Link speed: 0001 = 2.5 GbE PCIe link > > bits 9:4 Negociated link width: 001000 = x8 > > So it makes sense.
Right, hence the ethernet board can do 5 GbE x 8, but something in front of it can only do 2.5 GbE x 8. But 2.5 GbE x 8 means 20 Gb/s, which is much larger than the 2.7 Gb/s I get. -- Emmanuel Dreyfus http://hcpnet.free.fr/pubz m...@netbsd.org