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sleeepyjack / warpcore

A Library for fast Hash Tables on GPUs

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UVM Question

pengwu22 opened this issue · comments

commented

Hi developers! Is it built upon nvidia unified virtual memory? Thanks!

commented

Hi @pw2393. Sorry for the late response. We do not use UVM in this approach as the random memory access pattern induced by the hash table's probing scheme doesn't play well with UVM's prefetching heuristics. Instead, in case the table does not fit into the VRAM of a single GPU, we propose a multi-GPU distribution scheme over a dense NVLink topology (see papers linked in the readme file). For the input/output vectors you are free to put them in UVM.