Re: A new network interface send queue API

[Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>]

Hi,

On 2023/11/14 4:07, Jason Thorpe wrote:
> > On Nov 12, 2023, at 10:36 PM, Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost> wrote:
> >
> > Hi,
> >
> > What do you think about Tx NIC multiqueue?
> >
> > Currently, drivers which support Tx NIC multiqueue avoid driver global lock
> > to be MP-scalable.  I'm worried about sc->sc_txlock might be required in
> > ifp->if_transmit() driver implementation.
>
> It does not currently impact the few drivers that use Tx multi-queue.  In my example, “sc_txlock” is really just a placeholder for “hardware has single Tx queue, and this is the mutex for it”.  My work here has no impact on the drivers that use the driver-specific ifp->if_transmit facility at this time, although I would like to harmonize them at some point so common sets of assertions and queue manipulation routines can be used.
>
> -- thorpej

I see.  I'm looking forward to the common sets of them.


Thanks,

--
//////////////////////////////////////////////////////////////////////
Internet Initiative Japan Inc.

Device Engineering Section,
Core Product Development Department,
Network Division,
Technology Unit

Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>