严浩
73 lines
1.9 KiB
Bash
73 lines
1.9 KiB
Bash
#!/usr/bin/env bash
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#
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# ...
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#
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# 使用方法:
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# URL="https://git.1-h.cc/Scripts/Linux/raw/branch/2026/show_zram_status.sh"; curl -fsSL "$URL" | bash
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show_zram_status() {
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echo "========== zram 运行战报 =========="
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if ! command -v zramctl >/dev/null 2>&1; then
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echo "未安装 zramctl。"
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return 1
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fi
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local table
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table=$(zramctl --noheadings --output NAME,ALGORITHM,DISKSIZE,DATA,COMPR,TOTAL,COMP-RATIO,MOUNTPOINT 2>/dev/null || true)
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if [ -z "$table" ]; then
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echo "未发现活跃的 zram 设备。"
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return 0
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fi
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printf '%s\n' "$table"
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local stats
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stats=$(zramctl --bytes --raw --noheadings --output DATA,COMPR,TOTAL 2>/dev/null || true)
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if [ -z "$stats" ]; then
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echo "未发现活跃的 zram 设备。"
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return 0
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fi
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local data_size compr_size total_mem saved_bytes ratio
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read -r data_size compr_size total_mem <<EOF
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$(printf '%s\n' "$stats" | awk '{data += $1; compr += $2; total += $3} END {print data+0, compr+0, total+0}')
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EOF
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if [ "$total_mem" -le 0 ]; then
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echo "当前 zram 尚无可统计的数据。"
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return 0
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fi
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saved_bytes=$((data_size - total_mem))
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if [ "$saved_bytes" -lt 0 ]; then
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saved_bytes=0
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fi
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ratio=$(awk -v data="$data_size" -v total="$total_mem" 'BEGIN { printf "%.2f", data / total }')
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format_bytes() {
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awk -v bytes="$1" 'BEGIN {
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split("B KiB MiB GiB TiB PiB", units, " ")
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idx = 1
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while (bytes >= 1024 && idx < 6) {
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bytes /= 1024
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idx++
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}
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printf "%.2f %s", bytes, units[idx]
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}'
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}
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echo "----------- 汇总 -----------"
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echo "1. 原始数据量: $(format_bytes "$data_size")"
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echo "2. 压缩后大小: $(format_bytes "$compr_size")"
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echo "3. 实际占用内存: $(format_bytes "$total_mem")"
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echo "4. 压缩倍率: ${ratio}x"
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echo "5. 为系统节省了: $(format_bytes "$saved_bytes") 物理内存"
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echo "==================================="
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}
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show_zram_status
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