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{"id":2286196,"date":"2020-04-09T13:08:19","date_gmt":"2020-04-09T11:08:19","guid":{"rendered":"https:\/\/www.phonandroid.com\/?p=2286196"},"modified":"2020-04-09T13:08:19","modified_gmt":"2020-04-09T11:08:19","slug":"mediatek-accuse-tricher-benchmarks-soc","status":"publish","type":"post","link":"https:\/\/www.phonandroid.com\/mediatek-accuse-tricher-benchmarks-soc.html","title":{"rendered":"MediaTek est accus\u00e9 de tricher sur les benchmarks de ses SoC"},"content":{"rendered":"

MediaTek est accus\u00e9 de tricher sur les benchmarks de ses derniers chipsets. D'apr\u00e8s les tests r\u00e9alis\u00e9s par Anandtech sur les Helio P95 et les Dimensity 1000L, le fondeur a\u00a0apparemment\u00a0inclus un mode permettant de booster les performances de ses SoC quand un logiciel de benchmark est rep\u00e9r\u00e9. La d\u00e9fense de MediaTek se\u00a0r\u00e9sume \u00e0 pointer du\u00a0doigt les pratiques des concurrents et de ses partenaires.\u00a0<\/strong><\/p>\n

\"mediatek<\/p>\n

Une enqu\u00eate publi\u00e9e par nos confr\u00e8res AnandTech accuse ouvertement MediaTek de tricher sur les benchmarks de ses SoC. En examinant un Oppo Reno 3 Pro<\/a> aliment\u00e9 par Helio P95 et un\u00a0Oppo Reno 3<\/a> propuls\u00e9 par le Dimensity 1000L<\/a>, le m\u00e9dia a d\u00e9couvert des anomalies au niveau des performances. Contre toute attente, le SoC Helio P95<\/strong> a affich\u00e9 des performances largement sup\u00e9rieures au Dimensity 1000L. L'Helio P95 se contente pourtant de deux coeurs Cortex-A75, contre quatre coeurs Cortex-A77 pour le Dimensity 1000L.<\/p>\n

Pour en avoir le coeur net, AnandTech a install\u00e9 une version ind\u00e9tectable de PCMark<\/strong>, son outil de benchmarking, sur le Reno 3 Pro. Avec cette variante de PCMark, les logiciels inclus par les fondeurs et les constructeurs ne peuvent pas identifier les logiciels de benchmarking.\u00a0Verdict : le smartphone a r\u00e9alis\u00e9 des performances globales en baisse de 30%<\/strong> par rapport aux premiers tests. Lors de certains tests, les performances se sont m\u00eame effondr\u00e9es de 75%.<\/p>\n

Apr\u00e8s enqu\u00eate, AnandTech s'est rendu compte que MediaTek a int\u00e9gr\u00e9 un\u00a0fichier appel\u00e9 power_whitelist_cfg.xml dans le micrologiciel fourni aux constructeurs de t\u00e9l\u00e9phones, dont Oppo. \u00a0Cette ligne de code active un mode sport programm\u00e9 pour booster temporairement les performances<\/strong> du smartphone si un logiciel de benchmarking comme PCMark, AnTuTu, GFX et 3DBench\u00a0est lanc\u00e9. En clair, le chipset tourne \u00e0 plein r\u00e9gime pour berner les benchmarks. Les performances analys\u00e9es n'ont donc rien \u00e0 voir avec les performances r\u00e9elles.<\/p>\n

Toujours selon AnandTech, MediaTek cache ce logiciel de triche dans le micrologiciel de ses chipsets depuis plusieurs ann\u00e9es. De nombreux smartphones milieu de gamme sont concern\u00e9s, dont des t\u00e9l\u00e9phones Oppo, Sony, Vivo, Realme ou iVoomi<\/strong>.<\/p>\n

Lire \u00e9galement :\u00a0cette faille critique touche des millions de smartphones Android dot\u00e9s d\u2019un chipset MediaTek<\/a><\/strong><\/p>\n