怎么查看linux的哪个进程占用磁盘io较多？[200分]

[太乙]

http://topic.csdn.net/u/20091208/11/e68fa1aa-1914-4959-bd6d-0ae32a705642.html?34060

[do_fork]

/porc/$PID/io

[太乙]

[Quote=引用 1 楼 do_fork 的回复:]
/porc/$PID/io
[/Quote]

没有这个文件……

[do_fork]

[Quote=引用 2 楼 hqin6 的回复:]
引用 1 楼 do_fork 的回复:
/porc/$PID/io


没有这个文件……
[/Quote]

你的内核版本是?

root@sid:~# uname -a
Linux sid 2.6.31-1-686 #1 SMP Sun Nov 15 20:39:33 UTC 2009 i686 GNU/Linux

root@sid:~# cat /proc/1/io
rchar: 16428807
wchar: 8202326
syscr: 27617
syscw: 5263
read_bytes: 32885248
write_bytes: 3801088
cancelled_write_bytes: 3670016

[太乙]

[Quote=引用 3 楼 do_fork 的回复:]
引用 2 楼 hqin6 的回复:
引用 1 楼 do_fork 的回复:
/porc/$PID/io


没有这个文件……


你的内核版本是?

PHP code
root@sid:~# uname -aLinux sid2.6.31-1-686#1 SMP Sun Nov 15 20:39:33 UTC 2009 i686 GNU/Linux
root@sid:~# cat /proc/1/iorchar:16428807
wchar:8202326
syscr:27617
syscw:5263
read_bytes:32885248
write_bytes:3801088
cancelled_write_bytes:3670016
[/Quote]

嗯，我忘了贴我的机器配置了：

2.6.9-42.ELsmp

[do_fork]

跟内核配置有关，CONFIG_TASK_IO_ACCOUNTING，


看内核源码 fs/proc/base.c 有没有下面这个函数了，
如果内核有，把TASK_IO_ACCOUNTING编译上就可以了，
如果内核没有，只能自己写个内核模块。

#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
{
        struct task_io_accounting acct = task->ioac;
        unsigned long flags;

        if (whole && lock_task_sighand(task, &flags)) {
                struct task_struct *t = task;

                task_io_accounting_add(&acct, &task->signal->ioac);
                while_each_thread(task, t)
                        task_io_accounting_add(&acct, &t->ioac);

                unlock_task_sighand(task, &flags);
        }    
        return sprintf(buffer,
                        "rchar: %llu\n"
                        "wchar: %llu\n"
                        "syscr: %llu\n"
                        "syscw: %llu\n"
                        "read_bytes: %llu\n"
                        "write_bytes: %llu\n"
                        "cancelled_write_bytes: %llu\n",
                        (unsigned long long)acct.rchar,
                        (unsigned long long)acct.wchar,
                        (unsigned long long)acct.syscr,
                        (unsigned long long)acct.syscw,
                        (unsigned long long)acct.read_bytes,
                        (unsigned long long)acct.write_bytes,
                        (unsigned long long)acct.cancelled_write_bytes);
}
...............

[太乙]

[Quote=引用 5 楼 do_fork 的回复:]
跟内核配置有关，CONFIG_TASK_IO_ACCOUNTING，


看内核源码 fs/proc/base.c 有没有下面这个函数了，
如果内核有，把TASK_IO_ACCOUNTING编译上就可以了，
如果内核没有，只能自己写个内核模块。

C/C++ code#ifdef CONFIG_TASK_IO_ACCOUNTINGstaticint do_io_accounting(struct task_struct*task,char*buffer,int whole)
{struct task_io_accounting acct= task->ioac;
unsignedlong flags;if (whole&& lock_task_sighand(task,&flags)) {struct task_struct*t= task;

task_io_accounting_add(&acct,&task->signal->ioac);
while_each_thread(task, t)
task_io_accounting_add(&acct,&t->ioac);

unlock_task_sighand(task,&flags);
}return sprintf(buffer,"rchar: %llu\n""wchar: %llu\n""syscr: %llu\n""syscw: %llu\n""read_bytes: %llu\n""write_bytes: %llu\n""cancelled_write_bytes: %llu\n",
(unsignedlonglong)acct.rchar,
(unsignedlonglong)acct.wchar,
(unsignedlonglong)acct.syscr,
(unsignedlonglong)acct.syscw,
(unsignedlonglong)acct.read_bytes,
(unsignedlonglong)acct.write_bytes,
(unsignedlonglong)acct.cancelled_write_bytes);
}
...............
[/Quote]有简单的方法么？？编译内核是不可行的！

[do_fork]

似乎IO ACCOUNTING必须 >= 2.6.20 内核才支持