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PixInsight - More Cores or More Threads?

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#1 KTAZ

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Posted 25 November 2022 - 09:44 AM

For those of you in the know that have built a higher end processing machine; which should be my goal?

 

I'm not going to pay $3k for a processor, but I will pay for a good balance between performance and price.

 

That said, is a 2:1 ratio between threads and cores a good target?



#2 D_talley

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Posted 25 November 2022 - 10:33 AM

Pixinsight uses all available threads when processing your images. Also Pixinsight is more efficient when running a Linux system rather than windows. I currently process my images on a 56 core computer which handles my images quickly. The cost of CPUs are really low now. You can get a latest i9 13900K  24 core cpu for $575, so anything you build will be fast and give Pixinsight enough cores to process quickly.



#3 pyrasanth

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Posted 25 November 2022 - 10:52 AM

See this article which may help. Packages like Pixinsight can run multiple virtual threads from a single core hence the throughput is increased since threads are faster to execute than hardware alone.

 

I use the Ryzen 3950X which has 16 cores and PI uses it at a level of 32 threads- it is fairly quick however there are now faster Ryzen CPU's. If I was building a computer for PI I would use EPYC CPU's which can have "silly" numbers of cores and loads of memory however the cost would be epic!

 

https://www.serverba...res-vs-threads/


Edited by pyrasanth, 25 November 2022 - 10:52 AM.

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