refactor(zram): 模块化 zram 脚本并引入通用加载机制支持远程调用

2026-03-23 11:10:15 +08:00
parent 88603904c0
commit 2978818923
3 changed files with 190 additions and 136 deletions
@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+
+format_zram_bytes() {
+  awk -v bytes="$1" 'BEGIN {
+    split("B KiB MiB GiB TiB PiB", units, " ")
+    idx = 1
+    while (bytes >= 1024 && idx < 6) {
+      bytes /= 1024
+      idx++
+    }
+    printf "%.2f %s", bytes, units[idx]
+  }'
+}
+
+show_zram_status() {
+  echo "========== zram 运行战报 =========="
+
+  if ! command -v zramctl >/dev/null 2>&1; then
+    echo "未安装 zramctl。"
+    return 1
+  fi
+
+  local table
+  table=$(zramctl --noheadings --output NAME,ALGORITHM,DISKSIZE,DATA,COMPR,TOTAL,COMP-RATIO,MOUNTPOINT 2>/dev/null || true)
+
+  if [ -z "$table" ]; then
+    echo "未发现活跃的 zram 设备。"
+    return 0
+  fi
+
+  printf '%s\n' "$table"
+
+  local stats
+  stats=$(zramctl --bytes --raw --noheadings --output DATA,COMPR,TOTAL 2>/dev/null || true)
+
+  if [ -z "$stats" ]; then
+    echo "未发现活跃的 zram 设备。"
+    return 0
+  fi
+
+  local data_size compr_size total_mem saved_bytes ratio
+  read -r data_size compr_size total_mem <<EOF
+$(printf '%s\n' "$stats" | awk '{data += $1; compr += $2; total += $3} END {print data+0, compr+0, total+0}')
+EOF
+
+  if [ "$total_mem" -le 0 ]; then
+    echo "当前 zram 尚无可统计的数据。"
+    return 0
+  fi
+
+  saved_bytes=$((data_size - total_mem))
+  if [ "$saved_bytes" -lt 0 ]; then
+    saved_bytes=0
+  fi
+
+  ratio=$(awk -v data="$data_size" -v total="$total_mem" 'BEGIN { printf "%.2f", data / total }')
+
+  echo "----------- 汇总 -----------"
+  echo "1. 原始数据量: $(format_zram_bytes "$data_size")"
+  echo "2. 压缩后大小: $(format_zram_bytes "$compr_size")"
+  echo "3. 实际占用内存: $(format_zram_bytes "$total_mem")"
+  echo "4. 压缩倍率: ${ratio}x"
+  echo "5. 为系统节省了: $(format_zram_bytes "$saved_bytes") 物理内存"
+  echo "==================================="
+}
+
+if [ "${BASH_SOURCE[0]:-}" = "$0" ] || [ -z "${BASH_SOURCE[0]:-}" ]; then
+  show_zram_status
+fi