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/*
 * 'kernel_stat.h' contains the definitions needed for doing
 * some kernel statistics (CPU usage, context switches ...),
 * used by rstatd/perfmeter
 */

#define DK_MAX_MAJOR 64
#define DK_MAX_DISK 16

struct kernel_stat {
 unsigned int per_cpu_user[NR_CPUS],
              per_cpu_nice[NR_CPUS],
              per_cpu_system[NR_CPUS];
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}

struct kernel_stat kstat;

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�� �� hushui110.bbs@smth.org (�������) �Ĵ������ᵽ: ��
: ��  ��: ʱ�ӵװ봦��,���½��ʱ�������???
: ����վ: BBS ˮľ�廪վ (Wed Mar 13 21:18:38 2002)
: ת��վ: APUE!news.tiaozhan.com!thunews.dhs.org!SMTH
: 
: update_process_times��
:           if (p->counter < 0) {
:    p->counter = 0;
:    p->need_resched = 1;
:   }
:           if (p->priority < DEF_PRIORITY)
:    kstat.cpu_nice += user;
:   else
:    kstat.cpu_user += user;
:   kstat.cpu_system += system;
: ���� kstat�ṹ����ʲô�õ�
: �����������Ѿ��ж��Ƿ�ʱ���Ƭ�Ѿ�������Ҫ���µ��ȣ������Ժ��update_one_pro
: cess����
: ���õ�do_process_times��ʲô���� ,����Ҳ���ж���ʱ����SIGXCPU��ʱ�ź�
: static inline void do_process_times(struct task_struct *p,
:  unsigned long user, unsigned long system)
: {
:  long psecs;
:  psecs = (p->times.tms_utime += user);
:  psecs += (p->times.tms_stime += system);
:  if (psecs / HZ > p->rlim[RLIMIT_CPU].rlim_cur) { //����ж������õ�??
:   /* Send SIGXCPU every second.. */
:   if (!(psecs % HZ))
:    send_sig(SIGXCPU, p, 1);
:   /* and SIGKILL when we go over max.. */
:   if (psecs / HZ > p->rlim[RLIMIT_CPU].rlim_max)
:    send_sig(SIGKILL, p, 1);
:  }
: }
: --
: 
: ����һ�ɳ徢�´�, �׿�����ʵû�й���.
: 
: 
: �� ��Դ:��BBS ˮľ�廪վ smth.org��[FROM: 202.119.71.142]
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