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[2a01:cb00:21e:c000:2fb5:ec50:e5a7:75d4]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a774b417csm21287635e9.14.2026.04.28.08.59.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Apr 2026 08:59:33 -0700 (PDT) Mime-Version: 1.0 Date: Tue, 28 Apr 2026 17:59:32 +0200 Message-Id: Subject: Re: [PATCH dpdk] net/mlx5: add option to reduce Tx datapath compilation time Cc: , "Dariusz Sosnowski" , "Viacheslav Ovsiienko" , "Bing Zhao" , "Ori Kam" , "Suanming Mou" , "Matan Azrad" From: "Robin Jarry" To: "Bruce Richardson" User-Agent: aerc/0.21.0-142-gcff39137b013-dirty References: <20260421212356.573976-1-rjarry@redhat.com> In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 6_CW3QmP9nGB5sRiD1xvDDxNTGM069qjoT2FLtAqMKo_1777391975 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Bruce Richardson, Apr 22, 2026 at 09:27: > Out of interest, do you have any numbers for the performance delta betwee= n > the release builds with and without the new flag? I'm just wondering if t= he > flag can be the default to speed up builds generally? The raw performance will depend on which offload features are enabled. I have tested with the hardware I have at hand and these 3 TX offload combinations: 0x10000: FAST_FREE 0x10020: FAST_FREE TCP_TSO 0x1008f: FAST_FREE TCP_TSO UDP_TSO UDP_CKSUM TCP_CKSUM IPV4_CKSUM VLAN_INSE= RT MINIMAL_TX TX_OFFLOADS TX_FUNC NON_DROP_RATE =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D off 0x10000 mlx5_tx_burst_none_empw 42.4M off 0x10020 mlx5_tx_burst_mt_empw 39.4M off 0x1008f mlx5_tx_burst_sciv_empw 30.2M on 0x10000 mlx5_tx_burst_full_noi_empw 36.2M on 0x10020 mlx5_tx_burst_full_noi_empw 36.2M on 0x1008f mlx5_tx_burst_full_empw 30.2M There is obviously something wrong with my patch. I need to make sure the *no offload* case does not result in -15% of performance. > [Not that it should affect me that much, I generally use > -Denable_drivers flag when configuring my builds to only select the > specific drivers I want] I usually do this too but it turns out I *always* need mlx5 ;)