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FLOPs or MAC for conv? #785

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harryhan618 opened this issue Jan 12, 2021 · 3 comments
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FLOPs or MAC for conv? #785

harryhan618 opened this issue Jan 12, 2021 · 3 comments
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@dreamerlin

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@harryhan618
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It seems in flops_counter.py, multiplication and addition are treated as one operation. So I think it is calculating MAC rather than FLOPs? I think n MAC refers to n multiplication and (n-1) addition operations.

May I ask what's the usual way to calculate FLOPs?
@dreamerlin
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Hi! There is no problem here: actually, everywhere variables named flops are handled as macs (ref). But for most CV tasks, we identify FLOPs with MACs.

@harryhan618
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Thanks!

@code-by-jin
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Hi! There is no problem here: actually, everywhere variables named flops are handled as macs (ref). But for most CV tasks, we identify FLOPs with MACs.

Shouldn't FLOPs = 2* MACs. I am totally lost here. Should we just use the output macs to get flops, or we need multiply it by 2

@jmliu206 jmliu206 mentioned this issue Apr 14, 2023
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@harryhan618 @ycxioooong @dreamerlin @code-by-jin