Usage of GPUs in ALICE Online and Offline processing during LHC Run 3

ALICE will significantly increase its Pb–Pb data taking rate from the 1 kHz of triggered readout in Run 2 to 50 continuous for LHC 3. Updated tracking detectors are installed 3 and a new twophase computing strategy is employed. In first synchronous phase during taking, raw compressed storage an on-site disk buffer required detector calibration collected. second asynchronous reprocessed using final produce reconstruction output. Traditional CPUs unable cope with huge processing demands phase, therefore employs GPUs speed up processing. Since online farm performs part when there no beam LHC, plans use also this phase. This paper gives overview GPU full system test validate reference architecture, prospects usage