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Thu, 4 Mar 2021 17:27:51 +0000 Received: from DM6PR14MB3757.namprd14.prod.outlook.com ([fe80::aca4:b698:ee4d:e94a]) by DM6PR14MB3757.namprd14.prod.outlook.com ([fe80::aca4:b698:ee4d:e94a%2]) with mapi id 15.20.3912.022; Thu, 4 Mar 2021 17:27:51 +0000 From: "Das, Surajit" To: "nicolas.neel@allentis.eu" , "users@dpdk.org" Thread-Topic: [dpdk-users] Segmentation fault with -msse3 Thread-Index: AdcRFOR6iEw8KBnPRY2cumatSmAkGwABeIdA Date: Thu, 4 Mar 2021 17:27:51 +0000 Message-ID: References: <011601d71117$7076e8c0$5164ba40$@allentis.eu> In-Reply-To: <011601d71117$7076e8c0$5164ba40$@allentis.eu> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [14.141.56.230] x-ms-publictraffictype: Email X-MS-Office365-Filtering-Correlation-Id: 260945d6-2295-4cc9-4a71-08d8df32d7dd x-ms-traffictypediagnostic: DM6PR14MB3977:|BN6PR14MB1361: X-Microsoft-Antispam-PRVS: x-ms-oob-tlc-oobclassifiers: OLM:2733;OLM:2733; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Untrusted: BCL:0; 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DIR:OUT; SFP:1101; X-OriginatorOrg: commscope.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Mar 2021 17:27:53.4618 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 260945d6-2295-4cc9-4a71-08d8df32d7dd X-MS-Exchange-CrossTenant-Id: 31472f81-8fe4-49ec-8bc3-fa1c295640d7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=31472f81-8fe4-49ec-8bc3-fa1c295640d7; Ip=[13.59.96.180]; Helo=[obc.inkyphishfence.com] X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: TreatMessagesAsInternal-DM6NAM10FT014.eop-nam10.prod.protection.outlook.com X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR14MB1361 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: Re: [dpdk-users] Segmentation fault with -msse3 X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" Hi Nicolas, Looks like the CPU you are running on does not have the instruction ssse3. To check the list of flags available of your cpu, you can run: lscpu | grep Flags You will find that in the list of flags, ssse3 is not available on your cpu= . You can compile and run your app with the flag removed without functional i= ssues. Only difference will be that a bunch of instructions that could have been d= one faster in CPU hardware using ssse3, will now be done in software. Regards, Surajit From: users On Behalf Of nicolas.neel@allentis.eu Sent: Thursday, March 4, 2021 10:27 PM To: users@dpdk.org Subject: [dpdk-users] Segmentation fault with -msse3 Hello dpdk users, I'm a newbie to dpdk and I try to get the list of the rss= hash functions for a given port with the following code : static uint64_t = get_rss_function(int port_id){ int ret; struct rte Caution (External, nicolas.neel@allentis.eu) First-Time Sender Details Report This Email FAQ= Protection by INKY Hello dpdk users, I'm a newbie to dpdk and I try to get the list of the rss hash functions fo= r a given port with the following code : static uint64_t get_rss_function(int port_id){ int ret; struct rte_eth_rss_conf rss_conf; ret =3D rte_eth_dev_rss_hash_conf_get(port_id,&rss_conf); if(ret < 0){ printf("No supported rss\n"); return 0; } return rss_conf.rss_hf; } I use dpdk version 20.11 and my code is compiled with the following flags (= I 'm following the tips of the doc) : CXXFLAGS +=3D -mssse3 -mfma -mcx16 -msse4.1 -msse4.2 -mpopcnt -mavx -mavx2 -DALLOW_EXPERIMENTAL_API I have a segmentation fault calling ret =3D rte_eth_dev_rss_hash_conf_get(port_id,&rss_conf) ; and the coredump tell an issue with __memcpy_ssse3(). If I remove the -mssse3 I don't have the crash. Can you help me to identify the reason of the segmentation fault and tell m= e if I can easily remove the < -mssse3 > flag ? (Sorry for my english) Regards Nicolas