CBS mechanism

[Bigzhuang]

Hi all:
I 've read this demo(https://patchwork.kernel.org/patch/10412213/) . it's awesome and expounds details step by setps about mqprio and cbs mechanism. but still i got questions , after traffic steering to different TX queue for their socker priority, what rule will TX queues follow to decide which pkt be the first to leave nic? Is TX0 have the highest priority to send pkt? or it depends on L2 priority field? really confusing about it , thanks.