BFE EngineeringandClaude Fable 5
1d7dec167e
The qemu/ device sim answered the first question off-board: the same kernel family under -M virt gives musl vDSO rate ratio 0.99963 — the generic 6.18 armv7 vDSO is correct, so the board symptom is RV1106 register state (CNTFRQ/CNTVOFF, firmware-owned, secure-world boot chain). - qemu/tests/clockprobe: interval-based musl probe separating RATE error (CNTFRQ) from boot OFFSET (CNTVOFF) — the original single absolute sample cannot distinguish them. - qemu/tests/clock-sanity.sh: VM regression guard asserting the vDSO rate within 1% (PASSES: 1.00026); cross-builds the probe and stages it as payload itself. - kernel/rv1106-enablement/timer/PLAN.md: the DT fix (arm,cpu-registers-not-fw-configured + measured clock-frequency on the board dts) gated on the two bench measurements; c8a3 is currently physically dark, needs hands at the bench. - clockprobe joins the CI test loop. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018HUayid7W5w7jBdb9Rrj1K
93 lines
3.1 KiB
Bash
Executable File
93 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# Clock-sanity scenario (issue #3 regression guard): boot the VM, run the
|
|
# musl-static clockprobe in the guest, and assert the vDSO monotonic RATE
|
|
# matches the kernel's /proc/uptime within 1%. Under QEMU -M virt this passes
|
|
# on the current kernel (measured 0.99963) — a regression here means the
|
|
# generic vDSO path broke. The RV1106 *board* leg of issue #3 is a separate,
|
|
# bench-only measurement; this scenario cannot see board-specific CNTFRQ or
|
|
# CNTVOFF misprogramming.
|
|
#
|
|
# FAILS CLOSED on missing prerequisites.
|
|
#
|
|
# Usage: clock-sanity.sh <zImage>
|
|
set -euo pipefail
|
|
|
|
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" # qemu/tests/
|
|
QDIR="$(cd "$HERE/.." && pwd)" # qemu/
|
|
|
|
ZIMAGE="${1:-}"
|
|
if [ -z "$ZIMAGE" ] || [ ! -f "$ZIMAGE" ]; then
|
|
echo "FATAL: usage: $0 <zImage>" >&2
|
|
exit 1
|
|
fi
|
|
command -v qemu-system-arm >/dev/null || {
|
|
echo "FATAL: qemu-system-arm not on PATH — see qemu/README.md" >&2
|
|
exit 1
|
|
}
|
|
command -v arm-linux-gnueabihf-gcc >/dev/null || {
|
|
echo "FATAL: arm-linux-gnueabihf-gcc needed to cross-build the probe" >&2
|
|
exit 1
|
|
}
|
|
|
|
# Build the probe for the guest (static musl armv7) and stage it as payload.
|
|
( cd "$HERE/clockprobe" && \
|
|
CARGO_TARGET_ARMV7_UNKNOWN_LINUX_MUSLEABIHF_LINKER=arm-linux-gnueabihf-gcc \
|
|
cargo build -q --release --target armv7-unknown-linux-musleabihf )
|
|
install -m 0755 "$HERE/clockprobe/target/armv7-unknown-linux-musleabihf/release/clockprobe" \
|
|
"$QDIR/payload/clockprobe"
|
|
|
|
WORK="$(mktemp -d /tmp/wqc.XXXXXX)"
|
|
QEMU_PID=""
|
|
cleanup() {
|
|
if [ -n "$QEMU_PID" ]; then kill "$QEMU_PID" 2>/dev/null || true; fi
|
|
rm -rf "$WORK"
|
|
}
|
|
trap cleanup EXIT
|
|
|
|
bash "$QDIR/mkinitramfs.sh"
|
|
bash "$QDIR/mkimage.sh"
|
|
|
|
for _attempt in 1 2 3; do
|
|
PORT=$((22000 + RANDOM % 20000))
|
|
: > "$WORK/console.log"
|
|
{ sleep 40; printf '/usr/bin/clockprobe\n'; sleep 16; printf 'poweroff -f\n'; sleep 8; } | \
|
|
bash "$QDIR/run.sh" --kernel "$ZIMAGE" --shell \
|
|
--ssh-port "$PORT" --http-port $((PORT + 1)) --api-port $((PORT + 2)) \
|
|
> "$WORK/console.log" 2>&1 &
|
|
QEMU_PID=$!
|
|
sleep 3
|
|
kill -0 "$QEMU_PID" 2>/dev/null && break
|
|
if grep -aq 'Could not set up host forwarding' "$WORK/console.log"; then
|
|
echo "== hostfwd port collision on base $PORT — retrying"
|
|
QEMU_PID=""
|
|
continue
|
|
fi
|
|
echo "FATAL: VM died at launch:" >&2
|
|
tail -20 "$WORK/console.log" >&2
|
|
exit 1
|
|
done
|
|
if [ -z "$QEMU_PID" ] || ! kill -0 "$QEMU_PID" 2>/dev/null; then
|
|
echo "FATAL: could not launch the VM after 3 port attempts" >&2
|
|
exit 1
|
|
fi
|
|
|
|
wait "$QEMU_PID" || true
|
|
grep -a 'CLOCKPROBE' "$WORK/console.log" || {
|
|
echo "FATAL: probe never ran; console tail:" >&2
|
|
tail -25 "$WORK/console.log" >&2
|
|
exit 1
|
|
}
|
|
|
|
python3 - "$WORK/console.log" <<'EOF'
|
|
import re, sys
|
|
text = open(sys.argv[1], errors="replace").read()
|
|
m = re.search(r"ratio_mono=([0-9.]+) ratio_raw=([0-9.]+)", text)
|
|
if not m:
|
|
sys.exit("FATAL: no ratio line in console output")
|
|
mono, raw = float(m.group(1)), float(m.group(2))
|
|
ok = abs(mono - 1.0) < 0.01 and abs(raw - 1.0) < 0.01
|
|
print(f"clock-sanity: ratio_mono={mono} ratio_raw={raw} -> {'PASS' if ok else 'FAIL'}")
|
|
sys.exit(0 if ok else 1)
|
|
EOF
|
|
echo "CLOCK-SANITY-PASS"
|