3 ms·
Yuo see, when standard memcpy runs it has a big variance of power, i.e. large cycle to cycle differences in effective current through the processing chip. Agner
by formerly_proven 4y ago
Yuo see, when standard memcpy runs it has a big variance of power, i.e. large cycle to cycle differences in effective current through the processing chip. Agner Fog's memcpy is optimized to use the pipelines effectively, makes the processing operate smoothly and not in discrete steps, much less variation. That variation causes fluctuation in primary voltage supply which leaks into the analog path, creating noise and harshness.
- throwwaway8529 4y agoI can’t tell if you’re joking or not
- Frog0fWar 4y agoI guess it's not serious in this case, as streaming audio is not very CPU-intensive, BUT I noticed that when I trained my ML model (basically 100% GPU usage) I could hear a noise in my M40Xs. I guess it's some MOBO/GPU insulation issue.
- rektide 4y agoMy what-if joke was going to involve memcopy bringing up the dormant avx unit & causing some power fluctuations in the system. Which is like 99.9999999% a joke.
- dontlaugh 4y agoMost GPUs have some degree of coil whine, often under high or specific load. Even my PS5's has it in the menu of a particular game, I suspect they haven't capped the framerate for that menu.