78 lines
2.2 KiB
Markdown
78 lines
2.2 KiB
Markdown
# Test Case: Concurrent Reads
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**Test ID**: TC126-concurrent-reads
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**Category**: Boundary & Stress
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**Priority**: High
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**Regression**: None
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## Objective
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Verify 16 simultaneous full-file reads, with every PID, exit code, expected
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source hash, and mounted-file hash recorded and checkable.
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## Preconditions
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- Complete `G7-MANUAL-SETUP.md` and verify the workload source inventory.
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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/concurrent
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IMAGE=$FIX/images/workloads.erofs
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MNT=/mnt/repo22-g7-tc126
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E=$G7/evidence/TC126
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mkdir -p "$MNT" "$E"
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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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: > "$E/pids.tsv"
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index=0
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while [ "$index" -lt 16 ]; do
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file=$(printf 'reader-%02d.bin' "$index")
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expected=$(sha256 -q "$SRC/$file")
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(
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actual=$(sha256 -q "$MNT/concurrent/$file")
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printf 'worker=%02d file=%s expected=%s actual=%s\n' \
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"$index" "$file" "$expected" "$actual"
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test "$actual" = "$expected"
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) > "$E/worker-$(printf '%02d' "$index").log" 2>&1 &
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pid=$!
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printf '%02d\t%s\n' "$index" "$pid" >> "$E/pids.tsv"
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index=$((index + 1))
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done
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failed=0
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: > "$E/waits.tsv"
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while IFS="$(printf '\t')" read -r worker pid; do
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wait "$pid"
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rc=$?
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printf '%s\t%s\t%s\n' "$worker" "$pid" "$rc" >> "$E/waits.tsv"
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test "$rc" -eq 0 || failed=$((failed + 1))
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done < "$E/pids.tsv"
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cat "$E/pids.tsv" "$E/waits.tsv" "$E"/worker-*.log
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test "$failed" -eq 0
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test "$(wc -l < "$E/pids.tsv" | tr -d ' ')" -eq 16
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test "$(wc -l < "$E/waits.tsv" | tr -d ' ')" -eq 16
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alive=0
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while IFS="$(printf '\t')" read -r worker pid; do
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if kill -0 "$pid" 2>/dev/null; then
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printf 'still-alive worker=%s pid=%s\n' "$worker" "$pid"
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alive=$((alive + 1))
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fi
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done < "$E/pids.tsv"
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test "$alive" -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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- Exactly 16 PIDs and 16 waits are recorded; every wait exit code is 0.
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- Every worker log contains identical expected/source and actual/mounted
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SHA256 values.
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- None of the recorded PIDs remains alive; no `killall` or unrelated-process
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cleanup is used.
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- No deadlock, panic, hang, dmesg error, mount leak, or provider leak occurs.
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