df25275843
Tooling that produced the perf findings (committed for rerunnability): - scripts/bench/wasm-opt-bench.sh + o2-config-sweep.sh + sweep.conf: replay asyncify/-O2 over a cached fixture under allocator/THP/core matrices on the Hetzner runner. - scripts/bench/setup-vm.sh + cloud-init/ + vm-build.sh: local QEMU (HVF) Ubuntu guest with Docker CE to verify Linux builds without burning paid runners. - .gitignore: bench fixtures/results and the VM image stay local. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
92 lines
3.8 KiB
Shell
Executable file
92 lines
3.8 KiB
Shell
Executable file
#!/bin/bash
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# Provision a local QEMU aarch64 + HVF Ubuntu 24.04 VM for the wasm-opt benchmark.
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# RUNS ON THE macOS HOST (Apple Silicon). See scripts/bench/README.md.
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#
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# Subcommands:
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# prepare download cloud image, build NoCloud seed ISO, copy UEFI vars
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# run boot the VM (foreground, serial console; ssh on :2222)
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# ssh ssh into the running VM
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# (none) = prepare (if needed) then run
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#
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# Env overrides: VM_CORES (default 10), VM_MEM (default 20G), SSH_PORT (2222),
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# VM_DISK (default +30G grow; use VM_DISK=80G for full Docker builds via
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# scripts/bench/vm-build.sh — emsdk image + deps + build tree need ~50 GB).
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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VMDIR="${SCRIPT_DIR}/vm"
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CLOUD_INIT="${SCRIPT_DIR}/cloud-init"
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VM_CORES="${VM_CORES:-10}" # Mac has 10 cores; this caps the local sweep
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VM_MEM="${VM_MEM:-20G}" # asyncify peaks ~10-15 GB; leave headroom for macOS
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VM_DISK="${VM_DISK:-30G}" # disk grow beyond the ~3.5 GB cloud image
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SSH_PORT="${SSH_PORT:-2222}"
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IMG_URL="https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-arm64.img"
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QEMU_SHARE="$(brew --prefix qemu)/share/qemu"
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FW_CODE="${QEMU_SHARE}/edk2-aarch64-code.fd"
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FW_VARS_SRC="${QEMU_SHARE}/edk2-arm-vars.fd"
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BASE_IMG="${VMDIR}/ubuntu-24.04-arm64.img"
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DISK="${VMDIR}/disk.qcow2"
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SEED="${VMDIR}/seed.iso"
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FW_VARS="${VMDIR}/edk2-vars.fd"
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PUBKEY="${HOME}/.ssh/id_ed25519.pub"
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prepare() {
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mkdir -p "${VMDIR}"
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command -v qemu-system-aarch64 >/dev/null || { echo "Install qemu: brew install qemu" >&2; exit 1; }
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[[ -f "${PUBKEY}" ]] || { echo "No SSH pubkey at ${PUBKEY}" >&2; exit 1; }
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if [[ ! -f "${BASE_IMG}" ]]; then
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echo "Downloading Ubuntu 24.04 arm64 cloud image..."
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curl -fL -o "${BASE_IMG}" "${IMG_URL}"
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fi
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# Fresh working disk each prepare: copy the cloud image and grow it (the
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# cloud image is ~3.5 GB; binaryen + fixture + scratch need more headroom).
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echo "Creating working disk (${DISK}, +${VM_DISK})..."
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cp "${BASE_IMG}" "${DISK}"
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qemu-img resize "${DISK}" "+${VM_DISK}"
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# Writable UEFI vars store (copy of the template).
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cp "${FW_VARS_SRC}" "${FW_VARS}"
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# Build the NoCloud seed ISO (label must be CIDATA), injecting the pubkey.
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echo "Building cloud-init seed ISO..."
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local tmp; tmp="$(mktemp -d)"
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sed "s|__SSH_PUBKEY__|$(cat "${PUBKEY}")|" "${CLOUD_INIT}/user-data" > "${tmp}/user-data"
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cp "${CLOUD_INIT}/meta-data" "${tmp}/meta-data"
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rm -f "${SEED}"
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hdiutil makehybrid -iso -joliet -default-volume-name CIDATA -o "${SEED}" "${tmp}" >/dev/null
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rm -rf "${tmp}"
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echo "Prepared. Boot with: $0 run"
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}
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run() {
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[[ -f "${DISK}" && -f "${SEED}" && -f "${FW_VARS}" ]] || { echo "Run '$0 prepare' first." >&2; exit 1; }
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echo "Booting VM: ${VM_CORES} vCPU, ${VM_MEM} RAM, ssh -> localhost:${SSH_PORT} (user: bench)"
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echo "First boot runs cloud-init (installs packages); wait ~1-2 min before ssh."
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echo "Quit the serial console with: Ctrl-a x"
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exec qemu-system-aarch64 \
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-machine virt -accel hvf -cpu host \
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-smp "${VM_CORES}" -m "${VM_MEM}" \
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-drive "if=pflash,format=raw,readonly=on,file=${FW_CODE}" \
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-drive "if=pflash,format=raw,file=${FW_VARS}" \
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-drive "if=virtio,format=qcow2,file=${DISK}" \
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-drive "if=virtio,format=raw,file=${SEED}" \
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-netdev "user,id=n0,hostfwd=tcp::${SSH_PORT}-:22" \
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-device virtio-net,netdev=n0 \
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-nographic
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}
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do_ssh() { exec ssh -p "${SSH_PORT}" -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null bench@localhost "$@"; }
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case "${1:-}" in
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prepare) prepare ;;
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run) run ;;
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ssh) shift; do_ssh "$@" ;;
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"") [[ -f "${DISK}" && -f "${SEED}" ]] || prepare; run ;;
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*) echo "Usage: $0 {prepare|run|ssh}" >&2; exit 1 ;;
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esac
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