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[C4D] Resolved Bugs / Re: Dual cpu speed problems
« on: 2021-07-31, 20:22:58 »
Hello,
I think I have similar problem than you. Did you solve it?
I have 2 computers one with the same motherboard as you, with 2 e5-2696v4 (88 threats). And my other computer is a e5-2678v3 (24 threats)
At several benchmarks, the dual system is more than 3 times powerfull than the single cpu computer (cinebenchR15, cinebenchR20, cinebenchR23, coronabenchmark 1.3...)
But when I'm rendering with corona DR (3dsmax 2021.3 and corona 6.2), dual system makes only 1.1~1.2 times more passes than the single cpu system... How it can be possible?
At first time, I though I had LAN issues, but doesn't matter wich computer is slaving or is the main. The result is the same. Also, if I put the same scene at the same time in each computer to render. Dual system is only 1.1~1.2 faster than the single one... So, what is going on?!
When dual system is rendering, 88 threats are full load (100%) all the time without any drop... So reading at you, I guess corona is not handling properly dual system computers. I guess, corona is rendering with both CPUs in PARALLEL instead of in SERIAL (adding passes). Cos something is missing or failing at corona programing code... And that makes sense why if you deactivate one cpu in the dual system, the performance rise a bit... Cos again, is just a guess, I think both cpus are fighting to render the same pass at same time, reading the same info at RAM at same time. But at the end, only 1 CPU passes are counting...
I made some test with vray also, and results are more or less expected (dual system rendering 3 times more buckets than single cpu)
So, anyone can send some light to this problem?
I think I have similar problem than you. Did you solve it?
I have 2 computers one with the same motherboard as you, with 2 e5-2696v4 (88 threats). And my other computer is a e5-2678v3 (24 threats)
At several benchmarks, the dual system is more than 3 times powerfull than the single cpu computer (cinebenchR15, cinebenchR20, cinebenchR23, coronabenchmark 1.3...)
But when I'm rendering with corona DR (3dsmax 2021.3 and corona 6.2), dual system makes only 1.1~1.2 times more passes than the single cpu system... How it can be possible?
At first time, I though I had LAN issues, but doesn't matter wich computer is slaving or is the main. The result is the same. Also, if I put the same scene at the same time in each computer to render. Dual system is only 1.1~1.2 faster than the single one... So, what is going on?!
When dual system is rendering, 88 threats are full load (100%) all the time without any drop... So reading at you, I guess corona is not handling properly dual system computers. I guess, corona is rendering with both CPUs in PARALLEL instead of in SERIAL (adding passes). Cos something is missing or failing at corona programing code... And that makes sense why if you deactivate one cpu in the dual system, the performance rise a bit... Cos again, is just a guess, I think both cpus are fighting to render the same pass at same time, reading the same info at RAM at same time. But at the end, only 1 CPU passes are counting...
I made some test with vray also, and results are more or less expected (dual system rendering 3 times more buckets than single cpu)
So, anyone can send some light to this problem?