One major limitation of malloc (and even the best implementations like jemalloc and dlmalloc) is that they try to use a single allocator for each data structure. This is a mistake: A huge performance gain can be had by using
grouping through two simple rules:
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RYS-XLargeAfter testing several smaller models (Llama’s and smaller Qwen2’s), I set up the config for Qwen2-72B and let it sweep. Each $(i, j)$ configuration took a few minutes: load the re-layered model, run the math probe, run the EQ probe, record the scores, move on. Days of continuous GPU time on the 4090s. But far less compute than a fine tune! In fact, I didn’t even have the hardware needed for a LORA fine-tune on just 48GB of VRAM.。移动版官网对此有专业解读