#!/bin/bash

echo " PID     SWAP(MB)  NAME"
for pid in /proc/[0-9]*; do
  [ -r "$pid/status" ] || continue
  awk -v pid="${pid##*/}" '
    BEGIN { swap=0; name=""; }
    /^Name:/   { name=$2 }
    /^VmSwap:/  { swap=$2 }
    END { printf "%6s %9.2f   %s\n", pid, swap/1024, name }
  ' "$pid/status"
done | sort -k2 -nr | head -n 20