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Hierarchical hybrid sparse linear solver for multicore platforms

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Figure 1: Domain decomposition into four subdomains Ω 1 , . . . , Ω 4 . The initial domain Ω may be algebraically represented with the graph G associated to the sparsity pattern of matrix A (a).
Figure 2: Baseline MPI (a, b) versus MPI+thread (c) models on a 16 cores platform composed of two nodes of eight cores each
Figure 3: Operations related to the factorization of the first supernode (red block): triangular solve on the off-diagonal blocks (yellow blocks) and update to the facing column-blocks that owns
Figure 4: Binding strategies.
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