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Bandwidth in performance testing script #7

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sheevy opened this issue Jul 25, 2023 · 1 comment
Open

Bandwidth in performance testing script #7

sheevy opened this issue Jul 25, 2023 · 1 comment

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@sheevy
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sheevy commented Jul 25, 2023

In perftest.jl the number used for andwidth is 1355:
println("So that's cool. We are getting close to hardware limit, running at $(round(T_eff/1355*100), sigdigits=2) % of memory copy! 🚀")
Is that right. From what I can find online, the bandwith of A100 40GB is 1555. Also the readme states 1.55 TB/s.
Shall it be changed to 1555 in perftest.jl?
@luraess
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luraess commented Jul 25, 2023

1.55 TB/s is the vendor announced BW. Practically, memcopy often slightly differs from that theoretical number, reason I have the set the memcopy measured BW as ref here.

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@sheevy @luraess