On 11/18/20 5:41 PM, Jacob Keller wrote: > > > On 11/18/2020 11:22 AM, Parav Pandit wrote: >> >> >>> From: David Ahern <dsahern@xxxxxxxxx> >>> Sent: Wednesday, November 18, 2020 11:33 PM >>> >>> >>> With Connectx-4 Lx for example the netdev can have at most 63 queues >>> leaving 96 cpu servers a bit short - as an example of the limited number of >>> queues that a nic can handle (or currently exposes to the OS not sure which). >>> If I create a subfunction for ethernet traffic, how many queues are allocated >>> to it by default, is it managed via ethtool like the pf and is there an impact to >>> the resources used by / available to the primary device? >> >> Jason already answered it with details. >> Thanks a lot Jason. >> >> Short answer to ethtool question, yes, ethtool can change num queues for subfunction like PF. >> Default is same number of queues for subfunction as that of PF in this patchset. >> > > But what is the mechanism for partitioning the global resources of the > device into each sub function? > > Is it just evenly divided into the subfunctions? is there some maximum > limit per sub function? > I hope it is not just evenly divided; it should be user controllable. If I create a subfunction for say a container's networking, I may want to only assign 1 Rx and 1 Tx queue pair (or 1 channel depending on terminology where channel includes Rx, Tx and CQ).
