netdev - Re: [PATCH net-next v4 1/9] net/sched: optimize action stats api calls

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Date:   Sun, 12 Feb 2023 09:58:07 -0500
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Oz Shlomo <ozsh@...dia.com>
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
        Roi Dayan <roid@...dia.com>, Jiri Pirko <jiri@...dia.com>,
        Marcelo Ricardo Leitner <mleitner@...hat.com>,
        Simon Horman <simon.horman@...igine.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Subject: Re: [PATCH net-next v4 1/9] net/sched: optimize action stats api calls

On Sun, Feb 12, 2023 at 8:25 AM Oz Shlomo <ozsh@...dia.com> wrote:
>
> Currently the hw action stats update is called from tcf_exts_hw_stats_update,
> when a tc filter is dumped, and from tcf_action_copy_stats, when a hw
> action is dumped.
> However, the tcf_action_copy_stats is also called from tcf_action_dump.
> As such, the hw action stats update cb is called 3 times for every
> tc flower filter dump.
>
> Move the tc action hw stats update from tcf_action_copy_stats to
> tcf_dump_walker to update the hw action stats when tc action is dumped.
>
> Signed-off-by: Oz Shlomo <ozsh@...dia.com>
> Reviewed-by: Simon Horman <simon.horman@...igine.com>
> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

This patch is trivial, but if an ACK is needed, then:

Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

cheers,
jamal

> ---
>  net/sched/act_api.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/net/sched/act_api.c b/net/sched/act_api.c
> index cd09ef49df22..f4fa6d7340f8 100644
> --- a/net/sched/act_api.c
> +++ b/net/sched/act_api.c
> @@ -539,6 +539,8 @@ static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
>                                (unsigned long)p->tcfa_tm.lastuse))
>                         continue;
>
> +               tcf_action_update_hw_stats(p);
> +
>                 nest = nla_nest_start_noflag(skb, n_i);
>                 if (!nest) {
>                         index--;
> @@ -1539,9 +1541,6 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
>         if (p == NULL)
>                 goto errout;
>
> -       /* update hw stats for this action */
> -       tcf_action_update_hw_stats(p);
> -
>         /* compat_mode being true specifies a call that is supposed
>          * to add additional backward compatibility statistic TLVs.
>          */
> --
> 1.8.3.1
>