Blue Iris

Re: singe core speed vs core count

2021-10-22T09:25:11+00:00

Nice one. Thanks for the info.

Statistics: Posted by TimG — Fri Oct 22, 2021 9:25 am

Re: singe core speed vs core count

2021-07-22T09:19:59+00:00

Thank you very much for the link. It gives some general idea what to expect.
I was thinking about this core speed issue and come up with very easy to perform test scenario - I am ashamed of myself I didn`t think about it earlier ! What I did:
- I measured long enough average utilization of the CPU clocked at 4.1 GHz and it was between 68-70% on average. Depending on idle or triggered state.
- clocked exporting sample clip to mp4
- Downclocked CPU to 2.2 GHz and measured the same average utilization to be 70-73%
- exported the same clip
- checked overall responsiveness of the UI, logs for deepstack timings etc.
Observations - when running as a background service I don`t see any negative impact after reducing CPU frequency by almost half. While working with the UI I didn`t notice major impact. It is a little bit more sluggish, but it is not painful. With deepstack running on GPU I did not see any impact in average processing times (some operations have to be CPU dependent). Reencoding took longer - this is probably done exclusively on CPU.
Conclusion - single core speed do not matter that much, with CPU`s with higher IPC than my ancient amd fx4100 I tested it on it will matter even less. I decided to go for low power consumption, low clock high core count Xeon.

Shared my experiment as maybe someone in the future will find it useful.

Statistics: Posted by mkw — Thu Jul 22, 2021 9:19 am

Re: singe core speed vs core count

2021-07-21T13:45:33+00:00

I have not seen or am aware of a limit to the number of cores. AFAIK, the more the better and I'm already using quite a few - albeit on pretty old processors.

As for clock speed vs number of cores and which being better.... thats a hard call. This site has samples of real-world BI installs that you should be able to extrapolate what you're looking for. https://biupdatehelper.hopto.org/default.html#stats

Statistics: Posted by Matts1984 — Wed Jul 21, 2021 1:45 pm

singe core speed vs core count

2021-07-21T09:21:21+00:00

Hello

I am new user of BI. It is running for about two months and I decided to migrate. Now when I started to move cameras over I reached max of crappy HW I have tested it on. I need to move to something more powerful.
I have 2011 v3 based server but it is quite power hungry beast with e5-2680 v3. I am thinking about swapping out just CPU to save $$ and go down with power consumption. I had in mind moving to low power e5-2608l v4 that is 8core 16 thread chip with 1.6 G base frequency.
I have read through this forum but couldn`t really find an answer - how much cores/threads can BI utilize and how important single core speed is ?? I`d be really grateful for hints as testing this myself is about 2 days work - I have to migrate stuff that I have on this server right now just to see.

Regards, Mark

Statistics: Posted by mkw — Wed Jul 21, 2021 9:21 am