![调用并跟踪一个进程的内存使用情况](https://linux22.com/image/1370706/%E8%B0%83%E7%94%A8%E5%B9%B6%E8%B7%9F%E8%B8%AA%E4%B8%80%E4%B8%AA%E8%BF%9B%E7%A8%8B%E7%9A%84%E5%86%85%E5%AD%98%E4%BD%BF%E7%94%A8%E6%83%85%E5%86%B5.png)
答案1
这应该可以满足您的需要。它从中获取信息/proc/$PID/statm
并打印(来自man procfs
):
size total program size
(same as VmSize in /proc/[pid]/status)
resident resident set size
(same as VmRSS in /proc/[pid]/status)
share shared pages (from shared mappings)
data data + stack
剧本:
#!/usr/bin/env bash
## Print header
echo -e "Size\tResid.\tShared\tData\t%"
while [ 1 ]; do
## Get the PID of the process name given as argument 1
pidno=`pgrep $1`
## If the process is running, print the memory usage
if [ -e /proc/$pidno/statm ]; then
## Get the memory info
m=`awk '{OFS="\t";print $1,$2,$3,$6}' /proc/$pidno/statm`
## Get the memory percentage
perc=`top -bd .10 -p $pidno -n 1 | grep $pidno | gawk '{print \$10}'`
## print the results
echo -e "$m\t$perc";
## If the process is not running
else
echo "$1 is not running";
fi
done
然后,您可以调用该脚本,并为其指定一个进程名称作为输入。例如:
$ memusage.sh firefox
Size Resid. Shared Data %
517193 261902 9546 400715 12.8
517193 261902 9546 400715 12.8
517193 261902 9546 400715 12.8
517193 262100 9546 400715 12.8
517193 262100 9546 400715 12.8
517193 262100 9546 400715 12.8
517209 261899 9546 400731 12.8
517209 261899 9546 400731 12.8
笔记:
- 这假设只有一个单身的正在运行具有指定名称的进程。
答案2
多年后,我发现 valgrind 也有一个用于此的工具:
# record memory usage
$ valgrind --tool=massif bash -c "sleep 5; echo hey";
==5281== Massif, a heap profiler
==5281== Copyright (C) 2003-2015, and GNU GPL'd, by Nicholas Nethercote
==5281== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==5281== Command: bash -c sleep\ 5;\ echo\ hey
==5281==
hey
==5281==
# print the usage (5281 was the pid of bash, your filename will be different)
$ ms_print massif.out.4682
注意:valgrind 的作用不只是观察:它需要注入一些代码并拍摄内存快照。这可能会损害统计的准确性。