On Mon, Jul 21, 2025 at 09:17:55PM +0800, Shuai Xue wrote: > 2025/7/19 15:11, Lukas Wunner : > > PCI links can be tunneled over Thunderbolt, in this case the > > link speed is fixed to 2.5 GT/s (USB4 v1.0 sec 11.2.1), but > > in reality is governed by the speed of the Thunderbolt fabric > > (which can even be asymmetric). Do we want to report the > > virtual 2.5 GT/s in this case or the actual Thunderbolt speed? > > Or do we want a separate trace event for Thunderbolt? > > I'm not a user of Thunderbolt, which way do you prefer?
Keep reporting the virtual 2.5 GT/s in the PCI tracepoint and maybe add a separate tracepoint later in the thunderbolt driver to report the Thunderbolt speed. Thanks, Lukas
