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Multi GPU Performance of Conjugate Gradient Solver with Staggered   Fermions in Mixed Precision

Multi GPU Performance of Conjugate Gradient Solver with Staggered Fermions in Mixed Precision

๋ณธ ๋…ผ๋ฌธ์€ ๊ณ ์„ฑ๋Šฅ ์ปดํ“จํŒ…(HPC) ๋ถ„์•ผ์—์„œ GPU์˜ ๊ตฌ์กฐ์  ํŠน์„ฑ์„ ๋ฉด๋ฐ€ํžˆ ๋ถ„์„ํ•˜๊ณ , ์ด๋ฅผ ๊ฒฉ์ž ์–‘์ž์ƒ‰์—ญํ•™(lattice QCD) ๊ณ„์‚ฐ์— ์ ์šฉํ•œ ์‚ฌ๋ก€๋ฅผ ์ œ์‹œํ•œ๋‹ค. ๋จผ์ €, GPU๊ฐ€ ๋‹ค์ˆ˜์˜ ๋‹จ์ˆœ ์ฝ”์–ด๋ฅผ ํ†ตํ•ด ๋ฐ์ดํ„ฐ ์—ฐ์‚ฐ์— ํŠนํ™”๋œ ์„ค๊ณ„๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค๋Š” ์ ์„ ๊ฐ•์กฐํ•œ๋‹ค. ์ด๋Š” ์ „ํ†ต์ ์ธ CPU๊ฐ€ ๋ณต์žกํ•œ ์ œ์–ด ํ๋ฆ„๊ณผ ์บ์‹œ ๊ด€๋ฆฌ์— ๋ฌด๊ฒŒ๋ฅผ ๋‘๋Š” ๋ฐ˜๋ฉด, GPU๋Š” ๋Œ€์šฉ๋Ÿ‰ ์—ฐ์‚ฐ์„ ๋†’์€ ๋ณ‘๋ ฌ์„ฑ์œผ๋กœ ์ˆ˜ํ–‰ํ•˜๋„๋ก ์ตœ์ ํ™”๋ผ ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ฐจ์ด๋Š” ํŠนํžˆ ์—ฐ์‚ฐ๋Ÿ‰๋ณด๋‹ค ๋ฉ”๋ชจ๋ฆฌ I/O๊ฐ€ ๋ณ‘๋ชฉ์ด ๋˜๋Š” CG ์•Œ๊ณ ๋ฆฌ์ฆ˜์— ํฐ ์˜ํ–ฅ์„ ๋ฏธ์นœ๋‹ค. CG๋Š” ์„ ํ˜• ์‹œ์Šคํ…œ (b A x ) ๋ฅผ

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