Dynamic detection of uniform and affine vectors in GPGPU computations

Caroline Collange (1) , David Defour (1) , Yao Zhang (2)

1 LP2A - Laboratoire de Physique Appliquée et d'Automatique
2 ECE - ECE Department,

We present a hardware mechanism which dynamically detects uniform and affine vectors used in Graphics Processing Units, to minimize pressure on the register file and reduce power consumption with minimal architectural modifications. A preliminary experimental analysis conducted with a simulator shows that this optimization can benefit up to 34 % of register file reads and 22 % of the computations

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Mots clés: GPGPU; data locality; vector register file; architecture; microarchitecture

Domaines: Architectures Matérielles [cs.AR]

Caroline Collange, David Defour, Yao Zhang. Dynamic detection of uniform and affine vectors in GPGPU computations. Euro-Par 2009, Aug 2009, Delft, Netherlands. pp.46-55, ⟨10.1007/978-3-642-14122-5_8⟩. ⟨hal-00396719⟩