From: Ido Schimmel <idosch@idosch.org>
To: Petr Machata <petrm@nvidia.com>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Ido Schimmel <idosch@nvidia.com>
Subject: Re: [PATCH net-next v3 1/3] netdevsim: Introduce support for L3 offload xstats
Date: Mon, 14 Mar 2022 16:37:29 +0200 [thread overview]
Message-ID: <Yi9TKbmuhj0xtyuT@shredder> (raw)
In-Reply-To: <fa28d4ff7f55fec4928990850dc1abf8fac3eb45.1647265833.git.petrm@nvidia.com>
On Mon, Mar 14, 2022 at 03:01:15PM +0100, Petr Machata wrote:
> Add support for testing of HW stats support that was added recently, namely
> the L3 stats support. L3 stats are provided for devices for which the L3
> stats have been turned on, and that were enabled for netdevsim through a
> debugfs toggle:
>
> # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/enable_ifindex
>
> For fully enabled netdevices, netdevsim counts 10pps of ingress traffic and
> 20pps of egress traffic. Similarly, L3 stats can be disabled for a given
> device, and netdevsim ceases pretending there is any HW traffic going on:
>
> # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/disable_ifindex
>
> Besides this, there is a third toggle to mark a device for future failure:
>
> # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/fail_next_enable
>
> A future request to enable L3 stats on such netdevice will be bounced by
> netdevsim:
>
> # ip -j l sh dev d | jq '.[].ifindex'
> 66
> # echo 66 > /sys/kernel/debug/netdevsim/netdevsim10/hwstats/l3/enable_ifindex
> # echo 66 > /sys/kernel/debug/netdevsim/netdevsim10/hwstats/l3/fail_next_enable
> # ip stats set dev d l3_stats on
> Error: netdevsim: Stats enablement set to fail.
>
> Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
next prev parent reply other threads:[~2022-03-14 14:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-14 14:01 [PATCH net-next v3 0/3] netdevsim: Support for L3 HW stats Petr Machata
2022-03-14 14:01 ` [PATCH net-next v3 1/3] netdevsim: Introduce support for L3 offload xstats Petr Machata
2022-03-14 14:37 ` Ido Schimmel [this message]
2022-03-15 5:31 ` Jakub Kicinski
2022-03-14 14:01 ` [PATCH net-next v3 2/3] selftests: netdevsim: hw_stats_l3: Add a new test Petr Machata
2022-03-14 14:01 ` [PATCH net-next v3 3/3] selftests: mlxsw: " Petr Machata
2022-03-15 14:50 ` [PATCH net-next v3 0/3] netdevsim: Support for L3 HW stats patchwork-bot+netdevbpf
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