Replace fixed number cmake --build -j in sh and docs #10887

[MichaelIspas]

Summary

Replaces fixed number of cmake --build -j entries with:

mac: -j$(($(sysctl -n hw.ncpu) - 1)) linux: -j$(($(nproc) - 1))

Changes

Implemented changes to the best of my ability to .sh, .md, and .yml, could you kindly review if any changes were unnecessary or not relevant? I am a CS student learning how to work with FLOSS communities so I am happy to make any adjustments if needed, thank you.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/11351

• :page_facing_up: Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

:x: 29 New Failures, 45 Cancelled Jobs

As of commit a5b15d3770614ff7b4adad3129791616e88a387d with merge base b5a6362eb2f1ba3368e6f804f146ded8747df992 ():

NEW FAILURES - The following jobs have failed:

• Build macOS Wheels / pytorch/executorch / build-wheel-py3_10-cpu (gh) Process completed with exit code 1.
• Build macOS Wheels / pytorch/executorch / upload / upload-wheel-py3_10-cpu (gh) Unable to download artifact(s): Artifact not found for name: pytorch_executorch__3.10_cpu_
• pull / unittest / macos / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
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• trunk / test-custom-ops-macos (cmake) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-huggingface-transformers (allenai/OLMo-1B-hf) / linux-job (gh) RuntimeError: Command docker exec -t 382a9bb10bac1b527325614294c56a8e3357d157a97c64cbf7d4cb4eb3991ca6 /exec failed with exit code 1
• trunk / test-huggingface-transformers (google/gemma-3-1b-it) / linux-job (gh) RuntimeError: Command docker exec -t 5e037cb840a73102be3479cbb9df23b9dfd755fc022d118cdabaf6254a232e82 /exec failed with exit code 1
• trunk / test-huggingface-transformers (HuggingFaceTB/SmolLM2-135M) / linux-job (gh) RuntimeError: Command docker exec -t 56287d5ab46587210a1b2592630ecca65301ba2e20531338d006d0973308a1d6 /exec failed with exit code 1
• trunk / test-huggingface-transformers (meta-llama/Llama-3.2-1B) / linux-job (gh) RuntimeError: Command docker exec -t e3f3b57d0e124dc87dc12a3c444cf0f0816c29ca890645b87eea09bbc48762e6 /exec failed with exit code 1
• trunk / test-huggingface-transformers (Qwen/Qwen3-0.6B) / linux-job (gh) RuntimeError: Command docker exec -t 9dabb2bed85f7777798a2f2aa98f005345f7e9aa3f4b398525cd853bb5f781e0 /exec failed with exit code 1
• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-llama-runner-mac (fp32, mps) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-llama-runner-mac (fp32, xnnpack+custom+quantize_kv) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-llama-torchao-lowbit / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (efficient_sam, portable) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (emformer_join, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (ic4, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (llama, portable) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (llama2, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (llama3_2_vision_encoder, portable) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (mobilebert, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (mv3, portable) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (mv3, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (resnet50, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (vit, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos (w2l, xnnpack-quantization-delegation) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-selective-build-macos (cmake) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / unittest-release / macos / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• Build documentation / build (buck2) / Build doc (gh)
• Build Presets / linux (linux, linux.2xlarge, executorch-ubuntu-22.04-clang12) / build (gh)
• Build Presets / linux (llm, linux.2xlarge, executorch-ubuntu-22.04-clang12) / build (gh)
• Lint / android-java-format / linux-job (gh) ##[error]The operation was canceled.
• Lint / link-check / lint-xrefs / linux-job (gh) ##[error]The operation was canceled.
• Lint / lintrunner / linux-job (gh) ##[error]The operation was canceled.
• pull / android / build-llm-demo / linux-job (gh)
• pull / test-binary-size-linux-gcc / linux-job (gh)
• pull / test-llama-runner-linux-android / linux-job (gh) ##[error]The operation was canceled.
• pull / test-llava-runner-linux / linux-job (gh) ##[error]The operation was canceled.
• pull / test-models-linux (add_mul, xnnpack-quantization-delegation, linux.2xlarge) / linux-job (gh) ##[error]The operation was canceled.
• pull / test-models-linux (add, portable, linux.2xlarge) / linux-job (gh) ##[error]The operation was canceled.
• pull / test-models-linux (emformer_join, portable, linux.4xlarge.memory) / linux-job (gh) ##[error]The operation was canceled.
• pull / test-models-linux (emformer_transcribe, xnnpack-quantization-delegation, linux.2xlarge) / linux-job (gh)
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• pull / test-models-linux (mv2, portable, linux.2xlarge) / linux-job (gh)
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• pull / test-models-linux (w2l, portable, linux.4xlarge.memory) / linux-job (gh)
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This comment was automatically generated by Dr. CI and updates every 15 minutes.

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[jathu]

Thanks for the contribution @MichaelIspas! I have some feedback, mainly that most of these scripts are used on macOS and Linux (and also Windows in bash), so we need to support both systems

[github-actions[bot]]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
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[github-actions[bot]]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
Feel free to remove the Stale label if you feel this was a mistake.
If you are unable to remove the Stale label please contact a maintainer in order to do so.
If you want the bot to never mark this PR stale again, add the no-stale label.
Stale pull requests will automatically be closed after 30 days of inactivity.