63 lines
1.8 KiB
Markdown
63 lines
1.8 KiB
Markdown
# Test Case: Sequential Throughput
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**Test ID**: TC128-sequential-throughput
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**Category**: Boundary & Stress
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**Priority**: Medium
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**Regression**: None
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## Objective
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Record reproducible sequential-read metrics for the exact 256 MiB fixture
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under QEMU TCG while gating PASS only on complete and correct reads.
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## Preconditions
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- Complete `G7-MANUAL-SETUP.md` and record the QEMU TCG configuration.
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- Do not apply fixed MB/s thresholds across hosts.
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## Manual Steps
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```sh
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G7=/root/repo22-g7
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FIX=$G7/fixtures
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SRC=$FIX/sources/workloads/sequential/sequential.bin
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IMAGE=$FIX/images/workloads.erofs
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MNT=/mnt/repo22-g7-tc128
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E=$G7/evidence/TC128
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mkdir -p "$MNT" "$E"
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test "$(stat -f %z "$SRC")" -eq 268435456
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unit=$(mdconfig -a -t vnode -f "$IMAGE")
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mount -t erofs -o ro "/dev/$unit" "$MNT"
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TARGET=$MNT/sequential/sequential.bin
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source_hash=$(sha256 -q "$SRC")
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target_hash=$(sha256 -q "$TARGET")
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printf 'bytes=268435456\nsource=%s\ntarget=%s\n' \
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"$source_hash" "$target_hash" | tee "$E/hashes.txt"
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test "$source_hash" = "$target_hash"
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cmp "$SRC" "$TARGET"
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: > "$E/runs.tsv"
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run=1
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while [ "$run" -le 3 ]; do
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/usr/bin/time -p dd if="$TARGET" of=/dev/null bs=1m \
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> "$E/run-$run.log" 2>&1
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rc=$?
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printf '%s\t%s\n' "$run" "$rc" >> "$E/runs.tsv"
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cat "$E/run-$run.log"
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test "$rc" -eq 0 || exit 1
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run=$((run + 1))
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done
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cat "$E/runs.tsv"
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test "$(awk '$2 != 0 { bad++ } END { print bad + 0 }' "$E/runs.tsv")" -eq 0
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umount "$MNT"
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mdconfig -d -u "${unit#md}"
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test -z "$(mount -p | awk -v m="$MNT" '$2 == m { print }')"
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test -z "$(mdconfig -l | tr ' ' '\n' | grep -x "$unit")"
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```
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## PASS Gate
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- Mounted size is exactly 268435456; SHA256 and full `cmp` match the source.
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- All three `dd` reads transfer the full file and exit 0.
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- Bytes/second and real/user/sys times are reported as TCG metrics only.
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- No fixed speed gate, panic, hang, or cleanup leak occurs.
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