Radeon VII on a mining-like bench

[LaurV]

Originally Posted by axn

960/700 = 1.37 which means 37% faster (more thruput).

How do you figure?

960/700 = 1.37, or 37% slower. ("he runs 37% slower than he could")

700/960 = 0.73, or 27% faster. ("he can run 27% faster than he does")

If you trade forex and lose 33% of your account (i.e. you had $100 and you have now $67), then you need to make 50% profit, to come back to your initial sum ($100).

[retina]

The confusion is because of the silly (IMO) choice of inverted figures used.

960 us/it ~= 1042 it/s
700 us/it ~= 1429 it/s

So from 1042 it to 1429 it (per s) is 1429/1042 ~= 1.371429...

Therefore ~37% faster

[axn]

Originally Posted by LaurV

How do you figure?

As retina correctly pointed out, you should use the thruput figure (iters/s) rather than time (us/iter) to do the calculation. Hence, it is "27% slower" / "37% faster".

[tServo]

Originally Posted by Viliam Furik

If it's possible to run it through a VM, I might give it a try someday.

In a version of Windows 10 due to be released this year, you will be able to run Linux on WSL2, Windows Subsystem for Linux V2, which is what you want. It's available now, but only in the pre release "preview" version ( beta ) of Windows 10. It will probably be able to run CUDA, but none of that is completely certain. Whether it will be worth it or not remains to be seen. My impression from the previous posts here in several threads is that a lot of the Linux speed is derived from the special AMD Linux video driver "Rocm". The arrangement of device drivers on WSL2 is uncertain. If WSL2 just passes the CUDA requests thru to the windows video device driver, there may be little or no gain.

[M344587487]

Originally Posted by storm5510

Install Linux for a gain of 260 microseconds? Unless a person cut their OS teeth on Linux, there is not much to gain.

This comment hurts my soul. Three R7's on Linux are roughly equivalent to four R7's on Windows. Even an absolute noob can get Linux+ROCm+gpuowl running from scratch within a few hours by following a short list of instructions.

[storm5510]

Originally Posted by M344587487

This comment hurts my soul. Three R7's on Linux are roughly equivalent to four R7's on Windows. Even an absolute noob can get Linux+ROCm+gpuowl running from scratch within a few hours by following a short list of instructions.

No disparagement was intended. I have an Ubuntu on Windows setup for 20.04 LTS on Windows 10 Pro v2004. Beyond running mprime, I have not been able to do much with it. I have been a M$ user since 1988. IBM XT's, no HD's, 5 1/4" floppies, and green monochrome to look at. Personally, I tend to go with what I know.

I tried he math in micro form. 0.00070 / 0.00096 which gave me 0.72916. Doing a reciprocal gives 1.37142. The fractional part indicates 37.142%. I did not think this was correct. By looking at what is above, it is correct. I supposed I fooled myself with the decimal point and all the zero's. A 37% increase is considerable.

[LaurV]

Originally Posted by axn

As retina correctly pointed out, you should use the thruput figure (iters/s) rather than time (us/iter) to do the calculation. Hence, it is "27% slower" / "37% faster".

Hmmm... Makes sense^(TM).