I applied multithreading on a for loop that results in runtime speedup. I have 12 cores on my system and by adjusting the number of threads (e.g. 4, 8, and 12), I observe an improvement in runtime. However, the runtime improvement is not linear. For example, by using 4 threads, the runtime speedup i…

Unfortunately, without further information it is hardly possible to help you here. How does your loop kernel look like? Do you use @threads or @spawn? And, most importantly, do you have a good reason to expect linear scaling in the first place? Your kernel could easily be memory bound (quite common)…

How can I control the threads in lower level in multithreading function?

General Usage

Jeff_Emanuel December 16, 2021, 8:06pm 2

Not an answer to your question, but there’s some discussion on (lack of ) speedup here: Again on reaching optimal parallel scaling - #5 by carstenbauer

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How can I control the threads in lower level in multithreading function?

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