Search speed in AMD

[Krzysztof Grzelak]

I have such a request and question. I write immediately that I am not a programmer. I have a processor AMD Ryzen Threadripper 1950X. I am looking for information on how to increase the search of 1 core in the processor AMD Ryzen Threadripper 1950X. Please, if possible, a code in C ++. Thank you in advance for any information.

[mar]

My experience with AMD so far is that AMD loves everything cached in registers.
Any memory access (assuming in L1) is much slower than on Intel, or perhaps it's the other way around and AMD is much faster when executing reg-reg opcodes)
Optimizing compilers do this for you, obviously, so I don't see how this would help.
I've also heard that BMI2 is emulated on AMD, thus much slower than on Intel (I don't use BMI2 in my program).

[Michael Sherwin]

My experience with AMD so far is that AMD loves everything cached in registers.
Any memory access (assuming in L1) is much slower than on Intel, or perhaps it's the other way around and AMD is much faster when executing reg-reg opcodes)
Optimizing compilers do this for you, obviously, so I don't see how this would help.
I've also heard that BMI2 is emulated on AMD, thus much slower than on Intel (I don't use BMI2 in my program).

I can verify that BMI2 runs at only 2/3 of the node rate of the popcount version on my AMD 3950x.

[Dann Corbit]

ipman chess shows that the AMD BMI mode stinks, stanks, stunks.