compare_cgroups.sh

#!/bin/bash

# Check if two arguments (cgroup paths) are provided
if [ "$#" -ne 2 ]; then
  echo "Usage: $0 <cgroup1_path> <cgroup2_path>"
  exit 1
fi

cgroup1_path="$1"
cgroup2_path="$2"

# Check if the cgroup paths are valid directories
if [ ! -d "$cgroup1_path" ]; then
  echo "Error: Cgroup path '$cgroup1_path' is not a valid directory."
  exit 1
fi

if [ ! -d "$cgroup2_path" ]; then
  echo "Error: Cgroup path '$cgroup2_path' is not a valid directory."
  exit 1
fi

# Array of files to compare (excluding specified files)
files=(
  cgroup.controllers
  cgroup.events
  cgroup.freeze
  cgroup.max.depth
  cgroup.max.descendants
  cgroup.pressure
  cgroup.procs
  cgroup.subtree_control
  cgroup.threads
  cgroup.type
  cpu.idle
  cpu.max
  cpu.max.burst
  cpu.pressure
  cpu.uclamp.max
  cpu.uclamp.min
  cpu.weight
  cpu.weight.nice
  io.pressure
  irq.pressure
  memory.current
  memory.events
  memory.events.local
  memory.high
  memory.low
  memory.max
  memory.min
  memory.oom.group
  memory.peak
  memory.pressure
  memory.swap.current
  memory.swap.events
  memory.swap.high
  memory.swap.max
  memory.swap.peak
  memory.zswap.current
  memory.zswap.max
  memory.zswap.writeback
  pids.current
  pids.events
  pids.events.local
  pids.max
  pids.peak
)

# Function to read a file and return its contents, or "N/A" if not found/readable
read_file() {
  local file_path="$1"
  if [ -r "$file_path" ]; then
    # cat the file, replacing new lines with spaces
    cat "$file_path" | tr '\n' ' '
  else
    echo "N/A"
  fi
}

echo "-------------------------------------------------------------"
echo "Comparing cgroups:"
echo "  Cgroup 1: $cgroup1_path"
echo "  Cgroup 2: $cgroup2_path"
echo "-------------------------------------------------------------"

found_diff=false
for file in "${files[@]}"; do
  file1_path="$cgroup1_path/$file"
  file2_path="$cgroup2_path/$file"

  file1_content=$(read_file "$file1_path")
  file2_content=$(read_file "$file2_path")

  if [ "$file1_content" != "$file2_content" ]; then
    found_diff=true
    echo "  File: $file"
    echo "    Cgroup 1: $file1_content"
    echo "    Cgroup 2: $file2_content"
    echo "    -----------------"
  fi
done
if [ "$found_diff" = false ]; then
  echo "  No Differences Found"
fi
echo "-------------------------------------------------------------"