On Fri, Apr 18, 2025 at 09:53:24AM -0700, Erni Sri Satya Vennela wrote:
> On Thu, Apr 17, 2025 at 05:00:52PM -0700, Jakub Kicinski wrote:
> > On Thu, 17 Apr 2025 12:47:27 -0700 Erni Sri Satya Vennela wrote:
> > > > A single leaf is just Token Bucket Filter (TBF).
> > > > Are you just trying to support some vendor config?
> > > TBF does not support hardware offloading.
> >
> > Did you take a look at net_shapers? Will it not let you set a global
> > config the way you intend?
> Yes, Jakub. I have reviewed net-shapers and noted that it is not
> integrated into the kernel like tc. I mean there isn't a standard,
> general-purpose command for net-shaper in Linux. It is used by other
> tools or potentially device-specific drivers that want to leverage the
> NIC's hardware shaping capabilities.
>
> To configure shaping with net-shapers, users would need to execute a
> command similar to:
>
> ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/shaper.yaml
> --do set --json '{"ifindex":'$IFINDEX',
> "shaper": {"handle":
> {"scope": "node", "id":'$NODEID' },
> "bw-max": 2000000}}'
>
> Ref: https://lore.kernel.org/all/cover.1722357745.git.pab...@redhat.com/
>
> Given the simplicity of code implementation and ease of use for users in
> writing commands, I opted for tc-htb.
Hi Erni,
As someone who was involved with the design of net-shapers, I think it is
reasonable to instead use the Kernel API which appears to have been
designed specifically for this purpose: to control HW TX rate limiting.
If tooling isn't intuitive or otherwise doesn't meet user's needs
then that is something that can be addressed. But it's not a Kernel issue.
