Well, yes. That's no surprise mostly .... :-)
The 'other' thread is taking resources - HT will never speed up a given single task if you halve the resources available to it!
What is really needed is whether two simultaneously running WU threads ( under HT ) finish in less than twice the time that the one WU does ( under non-HT ). ( All WU's identical ).
Cheers, Mike.
( edit ) Or putting it another way .... does the non-HT single thread configuarion take more than half the time of one ( of two ) HT threads? If so, then with HT enabled, and both threads used for WU's, then you can complete more WU's in a given time! A rough comparison with your data:
S41.xx has an advanced overlapping technique, that means the FPU and the SSE instructions are executed in same time. Probably the HT control cannot do with this, because this technique is able to load the cpu totally. S41.07HT doesn't consist overlapping.
RE: I spent my afternoon on
)
Gravity increases significantly in Autumn, because apples fall in large numbers during that time!
RE: RE: I spent my
)
RE: [pre]Version HT nHT
)
Well, yes. That's no surprise mostly .... :-)
The 'other' thread is taking resources - HT will never speed up a given single task if you halve the resources available to it!
What is really needed is whether two simultaneously running WU threads ( under HT ) finish in less than twice the time that the one WU does ( under non-HT ). ( All WU's identical ).
Cheers, Mike.
( edit ) Or putting it another way .... does the non-HT single thread configuarion take more than half the time of one ( of two ) HT threads? If so, then with HT enabled, and both threads used for WU's, then you can complete more WU's in a given time! A rough comparison with your data:
[pre]Version HT nHT * 2 Percentage Gain ( +ve towards HT )
dist 7584 1740 = 870 * 2 { (1740 - 2367)/1740 = - 627/1740 = - 36.0 % }
S41.07HT 1948 < 2290 = 1145 * 2 { (2290 - 1948)/2290 = 342/2290 = 14.9% )
[/pre]
So that's a good point archae86, work nicely done! So what's with S41.07? Any hints anybody? akosf?
( edit squared ) Makes Intel's 30% claim ( for servers? ) pretty likely to be best case. Seldom seen?
I have made this letter longer than usual because I lack the time to make it shorter ...
... and my other CPU is a Ryzen 5950X :-) Blaise Pascal
Hi! At first, thanks to
)
Hi!
At first, thanks to archae86 for the nice datas.
S41.xx has an advanced overlapping technique, that means the FPU and the SSE instructions are executed in same time. Probably the HT control cannot do with this, because this technique is able to load the cpu totally. S41.07HT doesn't consist overlapping.