linux-kernel - Re: [Intel-wired-lan] [net-next v3 1/2] e1000e: Link NAPI instances to queues and IRQs

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Message-ID: <c6210bf9-be61-4d57-faa1-962c3a51ae87@intel.com>
Date: Tue, 8 Oct 2024 16:45:38 +0300
From: Avigail Dahan <Avigailx.dahan@...el.com>
To: Joe Damato <jdamato@...tly.com>, <netdev@...r.kernel.org>
CC: Przemek Kitszel <przemyslaw.kitszel@...el.com>, open list
	<linux-kernel@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com>, "Tony
 Nguyen" <anthony.l.nguyen@...el.com>, "moderated list:INTEL ETHERNET DRIVERS"
	<intel-wired-lan@...ts.osuosl.org>, Jakub Kicinski <kuba@...nel.org>, "Paolo
 Abeni" <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>
Subject: Re: [Intel-wired-lan] [net-next v3 1/2] e1000e: Link NAPI instances
 to queues and IRQs



On 30/09/2024 20:12, Joe Damato wrote:
> Add support for netdev-genl, allowing users to query IRQ, NAPI, and queue
> information.
> 
> After this patch is applied, note the IRQs assigned to my NIC:
> 
> $ cat /proc/interrupts | grep ens | cut -f1 --delimiter=':'
>   50
>   51
>   52
> 
> While e1000e allocates 3 IRQs (RX, TX, and other), it looks like e1000e
> only has a single NAPI, so I've associated the NAPI with the RX IRQ (50
> on my system, seen above).
> 
> Note the output from the cli:
> 
> $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
>                         --dump napi-get --json='{"ifindex": 2}'
> [{'id': 145, 'ifindex': 2, 'irq': 50}]
> 
> This device supports only 1 rx and 1 tx queue. so querying that:
> 
> $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
>                         --dump queue-get --json='{"ifindex": 2}'
> [{'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'rx'},
>   {'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'tx'}]
> 
> Signed-off-by: Joe Damato <jdamato@...tly.com>
> ---
>   drivers/net/ethernet/intel/e1000e/netdev.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
Tested-by: Avigail Dahan <avigailx.dahan@...el.com>