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|
#!/usr/bin/env bash
set -euo pipefail
usage() {
echo "Usage: $0 <tag> <dpu-pci-bdf> <chunk-directory> <chunk-size> [run-label]"
echo
echo "Examples:"
echo " $0 VANILLA_1G 03:00.0 bins/1G 1M VANILLA_1G_run_1"
echo " $0 TRACE_5G 03:00.0 bins/5G 1M TRACE_5G_run_1"
}
if [[ $# -lt 4 || $# -gt 5 ]]; then
usage
exit 1
fi
TAG="$1"
DPU_PCI="$2"
CHUNK_DIR="$3"
CHUNK_SIZE="$4"
RUN_LABEL="${5:-${TAG}}"
DECOMPRESS_BIN="./decompress"
LOG_DIR="logs"
OUT_CSV="${LOG_DIR}/cpu_${TAG}.csv"
mkdir -p "$LOG_DIR"
TMP_DIR="$(mktemp -d)"
DECOMPRESS_LOG="${TMP_DIR}/decompress.log"
TIME_LOG="${TMP_DIR}/time.log"
cleanup() {
rm -rf "$TMP_DIR"
}
trap cleanup EXIT INT TERM
die() {
echo "ERROR: $*" >&2
exit 1
}
read_proc_stat() {
# Outputs: idle total softirq
awk '
/^cpu / {
user_v=$2
nice_v=$3
system_v=$4
idle_v=$5
iowait_v=$6
irq_v=$7
softirq_v=$8
steal_v=$9
idle_all = idle_v + iowait_v
non_idle = user_v + nice_v + system_v + irq_v + softirq_v + steal_v
total = idle_all + non_idle
printf "%.0f %.0f %.0f\n", idle_all, total, softirq_v
exit
}
' /proc/stat
}
calc_system_cpu_pct() {
local before_idle="$1"
local before_total="$2"
local after_idle="$3"
local after_total="$4"
awk \
-v bi="$before_idle" \
-v bt="$before_total" \
-v ai="$after_idle" \
-v at="$after_total" \
'BEGIN {
total_delta = at - bt
idle_delta = ai - bi
if (total_delta <= 0) {
printf ""
} else {
cpu = 100.0 * (total_delta - idle_delta) / total_delta
printf "%.6f", cpu
}
}'
}
calc_softirq_cpu_pct() {
local before_total="$1"
local before_softirq="$2"
local after_total="$3"
local after_softirq="$4"
awk \
-v bt="$before_total" \
-v bs="$before_softirq" \
-v at="$after_total" \
-v as="$after_softirq" \
'BEGIN {
total_delta = at - bt
softirq_delta = as - bs
if (total_delta <= 0) {
printf ""
} else {
pct = 100.0 * softirq_delta / total_delta
printf "%.6f", pct
}
}'
}
parse_time_cpu_pct() {
local file="$1"
awk -F: '
/Percent of CPU this job got/ {
val = $2
gsub(/^[ \t]+|[ \t%]+$/, "", val)
print val
found = 1
}
END {
if (!found)
print ""
}
' "$file" 2>/dev/null | tail -n1
}
write_header_if_needed() {
if [[ ! -f "$OUT_CSV" ]]; then
echo "system_cpu_pct,process_cpu_pct,softirq_cpu_pct" > "$OUT_CSV"
fi
}
[[ -x "$DECOMPRESS_BIN" ]] || die "$DECOMPRESS_BIN not found or not executable"
[[ -d "$CHUNK_DIR" ]] || die "chunk directory not found: $CHUNK_DIR"
echo "[dpu] tag: $TAG"
echo "[dpu] run label: $RUN_LABEL"
echo "[dpu] chunk dir: $CHUNK_DIR"
echo "[dpu] chunk size: $CHUNK_SIZE"
echo "[dpu] pci: $DPU_PCI"
echo "[dpu] csv: $OUT_CSV"
echo "[dpu] dropping filesystem caches..."
sudo -n sh -c 'sync; echo 3 > /proc/sys/vm/drop_caches'
read before_idle before_total before_softirq < <(read_proc_stat)
set +e
(
/usr/bin/time -v sudo -n "$DECOMPRESS_BIN" \
-p "$DPU_PCI" \
-d "$CHUNK_DIR" \
-S "$CHUNK_SIZE"
) > "$DECOMPRESS_LOG" 2> "$TIME_LOG"
DECOMPRESS_STATUS=$?
set -e
read after_idle after_total after_softirq < <(read_proc_stat)
system_cpu_pct="$(
calc_system_cpu_pct "$before_idle" "$before_total" "$after_idle" "$after_total"
)"
softirq_cpu_pct="$(
calc_softirq_cpu_pct "$before_total" "$before_softirq" "$after_total" "$after_softirq"
)"
process_cpu_pct="$(parse_time_cpu_pct "$TIME_LOG")"
write_header_if_needed
printf "%s,%s,%s\n" \
"${system_cpu_pct:-}" \
"${process_cpu_pct:-}" \
"${softirq_cpu_pct:-}" \
>> "$OUT_CSV"
# Keep these prints so the host script can parse chunks/compressed_bytes/bytes/time/BW.
cat "$DECOMPRESS_LOG"
cat "$TIME_LOG"
if [[ "$DECOMPRESS_STATUS" -ne 0 ]]; then
echo "[dpu] decompressor failed with status $DECOMPRESS_STATUS"
echo "[dpu] appended CSV: $OUT_CSV"
exit "$DECOMPRESS_STATUS"
fi
echo "[dpu] decompressor completed successfully"
echo "[dpu] appended CSV: $OUT_CSV"
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