从

here开始：

[a] /proc/meminfo – This file reports statistics about memory usage on

the system. It is used by free to report the amount of free and used

memory (both physical and swap) on the system as well as the shared

memory and buffers used by the kernel. You can also use free,vmstat

and other tools to find out the same information.

[b]

/proc/${PID}/smaps,/proc/${PID}/status,and /proc/${PID}/stat : Use

these files to find information about memory,pages and swap used by

each process using its PID.

[c] smem – This command (python script) reports memory usage with

shared memory divided proportionally.

#!/bin/bash

# Get current swap usage for all running processes

# Erik Ljungstrom 27/05/2011

SUM=0

OVERALL=0

for DIR in `find /proc/ -maxdepth 1 -type d | egrep "^/proc/[0-9]"` ; do

PID=`echo $DIR | cut -d / -f 3`

PROGNAME=`ps -p $PID -o comm --no-headers`

for SWAP in `grep Swap $DIR/smaps 2>/dev/null| awk '{ print $2 }'`

do

let SUM=$SUM+$SWAP

done

echo "PID=$PID - Swap used: $SUM - ($PROGNAME )"

let OVERALL=$OVERALL+$SUM

SUM=0

done

echo "Overall swap used: $OVERALL"