{"id":86564,"date":"2020-06-27T01:42:06","date_gmt":"2020-06-26T23:42:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vulkan-drajver-radv-perevedyon-na-ispolzovanie-bekenda-kompilyaczii-shejderov-aco"},"modified":"2020-06-27T01:42:06","modified_gmt":"2020-06-26T23:42:06","slug":"vulkan-drajver-radv-perevedyon-na-ispolzovanie-bekenda-kompilyaczii-shejderov-aco","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/vulkan-drajver-radv-perevedyon-na-ispolzovanie-bekenda-kompilyaczii-shejderov-aco","title":{"rendered":"Le pilote Vulkan RADV a \u00e9t\u00e9 converti pour utiliser le backend de compilation des shaders ACO.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dans la base de code utilis\u00e9e pour la cr\u00e9ation de la version Mesa 20.2, il a \u00e9t\u00e9 r\u00e9alis\u00e9<\/a><\/noindex> activation de RADV, le pilote Vulkan pour les chipsets AMD, en utilisant par d\u00e9faut le backend pour la compilation des shaders \u00abACO<\/a><\/noindex>\u00bb, qui est en d\u00e9veloppement par Valve en tant qu'alternative au compilateur de shaders LLVM. Ce changement devrait am\u00e9liorer les performances des jeux et r\u00e9duire leur temps de lancement. Pour revenir \u00e0 l'ancien backend, une variable d'environnement \u00ab RADV_DEBUG=llvm \u00bb est pr\u00e9vue.<\/p>\n

Le passage du pilote RADV vers le nouveau backend a \u00e9t\u00e9 possible apr\u00e8s que ACO a atteint la parit\u00e9 fonctionnelle avec l'ancien backend d\u00e9velopp\u00e9 par AMD pour le pilote AMDGPU, qui continue d'\u00eatre utilis\u00e9 dans le pilote OpenGL RadeonSI. Les tests effectu\u00e9s par Valve a montr\u00e9<\/a><\/noindex>, montrent qu'ACO surpasse presque deux fois le compilateur de shaders AMDGPU en termes de vitesse de compilation et d\u00e9montre une augmentation des FPS dans certains jeux lorsqu'ils fonctionnent sur des syst\u00e8mes avec le pilote RADV.
\n

\"Le<\/a><\/noindex><\/center>
\n
\"Le<\/a><\/noindex><\/center><\/p>\n

Le backend ACO vise \u00e0 garantir la g\u00e9n\u00e9ration de code aussi optimale que possible pour les shaders d'applications de jeu, tout en atteignant une tr\u00e8s grande vitesse de compilation. ACO est \u00e9crit en C++, d\u00e9velopp\u00e9 en tenant compte de l'utilisation pour la compilation JIT et utilise des structures de donn\u00e9es rapides pour les it\u00e9rations, \u00e9vitant les structures bas\u00e9es sur des pointeurs. La repr\u00e9sentation interm\u00e9diaire du code se base enti\u00e8rement sur SSA (Static Single Assignment) et permet une allocation de registres, en pr\u00e9calculant avec pr\u00e9cision le registre en fonction du shader. <\/p>\n

Ajout : \u00c0 l'heure actuelle, ACO ne fonctionne que pour le pilote Vulkan Mesa RADV. Mais les d\u00e9veloppeurs d'ACO ils ont confirm\u00e9<\/a><\/noindex>, ont d\u00e9clar\u00e9 que leur prochaine \u00e9tape sera de commencer \u00e0 travailler sur l'extension des capacit\u00e9s d'ACO pour garantir la prise en charge du pilote OpenGL RadeonSI, afin qu'\u00e0 l'avenir ACO puisse \u00e9galement remplacer par d\u00e9faut le compilateur de shaders LLVM pour ce pilote.<\/p>\n

<\/a><\/noindex><\/p>\n

Source : opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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