netdev - Re: [PATCH net-next,v3 00/12] add flow

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Date:   Thu, 22 Nov 2018 14:22:20 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        thomas.lendacky@....com, f.fainelli@...il.com,
        ariel.elior@...ium.com, michael.chan@...adcom.com,
        santosh@...lsio.com, madalin.bucur@....com,
        yisen.zhuang@...wei.com, salil.mehta@...wei.com,
        jeffrey.t.kirsher@...el.com, tariqt@...lanox.com,
        saeedm@...lanox.com, jiri@...lanox.com, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, peppe.cavallaro@...com,
        grygorii.strashko@...com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, alexandre.torgue@...com,
        joabreu@...opsys.com, linux-net-drivers@...arflare.com,
        ganeshgr@...lsio.com, ogerlitz@...lanox.com,
        Manish.Chopra@...ium.com
Subject: Re: [PATCH net-next,v3 00/12] add flow_rule infrastructure

On Wed, Nov 21, 2018 at 03:51:20AM +0100, Pablo Neira Ayuso wrote:
> Hi,
> 
> This patchset is the third iteration [1] [2] [3] to introduce a kernel
> intermediate (IR) to express ACL hardware offloads.

On v2 cover letter you had:

"""
However, cost of this layer is very small, adding 1 million rules via
tc -batch, perf shows:

     0.06%  tc               [kernel.vmlinux]    [k] tc_setup_flow_action
"""

The above doesn't include time spent on children calls and I'm worried
about the new allocation done by flow_rule_alloc(), as it can impact
rule insertion rate. I'll run some tests here and report back.