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DTSTAMP:20230124T171521Z
LOCATION:C148
DTSTART;TZID=America/Chicago:20221114T155000
DTEND;TZID=America/Chicago:20221114T161000
UID:submissions.supercomputing.org_SC22_sess460_ws_pdsw103@linklings.com
SUMMARY:Accelerating Flash-X Simulations with Asynchronous I/O
DESCRIPTION:Workshop\n\nAccelerating Flash-X Simulations with Asynchronous
  I/O\n\nJain, Tang, Dhruv, Harris, Byna\n\nMost high-fidelity physics simu
 lation codes, such as Flash-X, need to save intermediate results (checkpoi
 nt files) to restart or gain insights into the evolution of the simulation
 . These simulation codes save such intermediate files synchronously, where
  computation is stalled while the data is written to storage.  Depending o
 n the problem size and computational requirements, this file write time ca
 n be a substantial portion of the total simulation time. In this paper, we
  evaluate the overheads and the overall benefit of asynchronous I/O in HDF
 5 to simulations.  Results from real-world high-fidelity simulations on th
 e Summit supercomputer show that I/O operation is overlapped with applicat
 ion communication or computation or both, effectively hiding some or all o
 f the I/O latency. Our evaluation shows that while using asynchronous I/O 
 adds overhead to the application, the I/O time reduction is more significa
 nt, resulting in overall up to 1.5X performance speedup\n\nSession Format:
  Recorded\n\nRegistration Category: Workshop Reg Pass
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