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Thu, 28 Aug 2025 15:33:41 +0000 Message-ID: <56aac06f-45b6-4a3c-9436-f400a4efd3d5@intel.com> Date: Thu, 28 Aug 2025 17:33:36 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] ipv6: sit: Add ipip6_tunnel_dst_find() for cleanup To: Yue Haibing CC: , , , , , , , References: <20250827040027.1013335-1-yuehaibing@huawei.com> <5b0d6d7c-b65e-4022-b028-05f45fe56bf9@huawei.com> <83aeba1c-27ff-4a92-b91e-5719be879e7a@huawei.com> From: Alexander Lobakin Content-Language: en-US In-Reply-To: <83aeba1c-27ff-4a92-b91e-5719be879e7a@huawei.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: VI1P191CA0001.EURP191.PROD.OUTLOOK.COM (2603:10a6:800:1ba::11) To DS0PR11MB8718.namprd11.prod.outlook.com (2603:10b6:8:1b9::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB8718:EE_|PH7PR11MB5913:EE_ X-MS-Office365-Filtering-Correlation-Id: 319440f1-940a-4320-fcb6-08dde6484458 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7053199007; 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I'm curious >>> whether the object code got any changes or the compilers still just >>> inline this function to both call sites. > > On a x86_64, with allmodconfig: > > ./scripts/bloat-o-meter -c net/ipv6/sit.o net/ipv6/sit-after.o > add/remove: 2/0 grow/shrink: 1/1 up/down: 1770/-2152 (-382) > Function old new delta > ipip6_tunnel_dst_find - 1697 +1697 > __pfx_ipip6_tunnel_dst_find - 64 +64 > ipip6_tunnel_xmit.isra.cold 79 88 +9 > ipip6_tunnel_xmit.isra 9910 7758 -2152 Oh okay, so it doesn't inline the function due to its size. Maybe it's even better since we have a good object code reduction now and that branch inside the func shouldn't hurt the performance much. > Total: Before=70060, After=69678, chg -0.55% Thanks, Olek