>code a GPU program
>it's slower than the corresponding CPU program
Code a GPU program
Evan Cox
Benjamin Hall
>using logic with complicated branching on something that will run in a GPU
shiggy diggy
Kayden Green
>Want control over individual pixels for say 256 color modes or stuff like palette techniques
>have to use (((shaders)))
Grayson Torres
>cpu
>5 million tripcodes per second
>gpu
>25 million tripcodes per second
Why?
Andrew James
transfering data to and from the gpu is slow. only good use case for gpus is sending the data once and doing a lot of computations with it while it's in the gpus memory.
Luis Peterson
It's not that simple you mong. You have to code it in a way that instructions don't run in series. Instead you have to make a majority of it run in parallel which is batshit insanely hard.
Even making programes run on more than 2-4 cores efficiently is already a daunting task (see gaymen), good luck getting shit to run on 2,000+ cores efficiently.
Aaron Reed
>make program that runs on 6000 processors with a super low clock speed
>slower than a program that runs on 1 processor clocked at least 10000 times higher
WHEW LAD TELL ME MORE
Oliver Powell
absolute state, etc
also kys tripfag
Jacob Ortiz
Memory is slower and each thread is slower. A GPU is only better when your problem is extremely parallel in nature.
These
James King
It should also be noted that at the end of the day despite having an assload of coars consumer GPUs are not that much more powerful than consumer CPUs in terms of FP64 math. While they have magnitudes more FP32 compute performance it makes it even harder to write efficient software for them(see rounding errors). AMD GPUs generally have more FP64 but coding for CUDA is easier. Once you get to 8-16 core modern AMD/intel stuff GPU acceleration becomes less attractive to devs especially given intel's 512-bit AVX i9s.
General AVX FP64 compute of haswell 4-core processor: 112 GFLOPS
Theoretical FP64 compute of a gtx 2080ti : 420 GFLOPS
Theoretical FP64 compute of a Quadro GV100: 8,330 GFLOPS
That's why those fuckers go for ~$10,000