1) Message boards : Number crunching : Odd performance on different computers (Message 4212)
Posted 7 May 2020 by CallMeFoxie
Post:
nope it was pure windows vs linux apparently. No idea why but it's just the way it is.

and R2700 on stock is nothing hard to cool, I had overclocked i5-2500k cooled down before with this cooler :P
2) Message boards : Number crunching : Odd performance on different computers (Message 4198)
Posted 7 May 2020 by CallMeFoxie
Post:
yup, drained the windows host, fired up a linux VM with 12c/16GB RAM and the tasks are much faster than on windows (even 25 - 30% faster than on the i7-3770) on all U@H, Rosetta, WCG, ...

and SMT may slow down about 10% - 15% each thread BUT you get double the amount of them in parallel. The final number of crunches/second is much higher.
3) Message boards : Number crunching : Odd performance on different computers (Message 4185)
Posted 4 May 2020 by CallMeFoxie
Post:
Wow. In that case I may as well move the BOINC to a linux virtualized guest and see how that fares! :) thanks for the info.
4) Message boards : Number crunching : Odd performance on different computers (Message 4183)
Posted 4 May 2020 by CallMeFoxie
Post:
yeah using a team account atm

The Ryzen is Windows based, would it make *that* much difference?

And the Ryzen is NVMe SSD whereas the i7 is slow 7k2 RPM HDDs. Since it uses very little RAM I'd expect it to trash cache at least if not something else, but even there the Ryzen wins :)
5) Message boards : Number crunching : Odd performance on different computers (Message 4181)
Posted 4 May 2020 by CallMeFoxie
Post:
Hi, I'm crunching bh2 spin on several different types of computers and I have a very odd performance :)

i7-3770k 3.7GHz, 4c8t, 32GB RAM (limited to 8GB in LXC, 4 tasks in parallel) crunches a task in less than 2 hours
Ryzen 2700 3.3GHz, 8c16t, 32GB RAM (unlimited memory, 12 tasks in parallel) crunches a task in almost 3.5 hours?!
PIne64+ 1.152GHz (Cortex A53, 4c4t, 2GB RAM, 4 tasks in parallel) takes about 16 hours (I can understand that one, slower cores and very slow clock)

why is Ryzen so much slower when it is much newer? Is there some compile time flag optimized for Intel? I've even tried disabling smp on the Ryzen machine but no change there, still over 3 hours per tasks.

Cheers
Ashley :)







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