3 ms·
Golly. There are probably already enough comments in other threads saying this, but I'm curious how you would justify the description 'footnote'.
by janwas 3y ago
Golly. There are probably already enough comments in other threads saying this, but I'm curious how you would justify the description 'footnote'.
- dotnet00 3y agoFootnote relative to the overall FLOPs. IIRC, on Perlmutter's GPU partition, 60 of its 64PFLOPs are represented by the GPUs, with the remaing 4PFLOPs, being the CPUs. In comparison, their previous system Cori, had ~3PFLOPs in the Haswell partition and ~30PFLOPs on the KNL partition. That, to me, indicates that CPU performance is mostly a footnote when GPUs are involved, as anyone who had previously been using Cori and is now on Perlmutter, will not see as dramatic of an improvement if restricted to CPUs but they would if able to use GPUs.
- janwas 3y agoOK, fair :) Do you have any data on how many tasks are actually compute-bound? From where I sit, we're often limited by memory bandwidth. When a CPU such as A64FX or even M2 shows up with decent bandwidth, lo and behold, they are often competitive. I do not understand why we didn't see something like SPR Max years ago.