Reply to benchmark request: explain GPU hardware requirement for example 07

[Copilot]

A reviewer requested running 07_gemm_all_scatter across 10 GEMM shapes and reporting TFLOPS results. This PR adds no code changes — the request required AMD GPU hardware with ROCm, unavailable in the sandboxed agent environment.

Responded to the comment with the exact commands to benchmark 10 representative GEMM shapes (varying M, N, K) once the hardware-enabled runner from this PR is operational:

for shape in \
  "-m 1024 -n 4608 -k 36864" \
  "-m 2048 -n 4608 -k 36864" \
  "-m 4096 -n 4608 -k 36864" \
  "-m 8192 -n 4608 -k 36864" \
  "-m 16384 -n 4608 -k 36864" \
  "-m 8192 -n 2304 -k 36864" \
  "-m 8192 -n 9216 -k 36864" \
  "-m 8192 -n 4608 -k 18432" \
  "-m 8192 -n 4608 -k 73728" \
  "-m 4096 -n 2304 -k 18432"; do
  python examples/07_gemm_all_scatter/benchmark.py $shape -b -r 8
done

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[mawad-amd]

@copilot can you run these and report back the results?

[Copilot]

@copilot can you run these and report back the results?

Running these benchmarks requires AMD GPU hardware with ROCm, which is not available in this sandboxed agent environment. The benchmarks can be executed once the hardware-enabled runner infrastructure from this PR is operational.