LXR linux-old/include/linux/kernel

   1#ifndef _LINUX_KERNEL_STAT_H
   2#define _LINUX_KERNEL_STAT_H
   3
   4#include <linux/config.h>
   5#include <asm/irq.h>
   6#include <linux/smp.h>
   7#include <linux/threads.h>
   8
   9/*
  10 * 'kernel_stat.h' contains the definitions needed for doing
  11 * some kernel statistics (CPU usage, context switches ...),
  12 * used by rstatd/perfmeter
  13 */
  14
  15#define DK_MAX_MAJOR 16
  16#define DK_MAX_DISK 16
  17
  18struct kernel_stat {
  19        unsigned int per_cpu_user[NR_CPUS],
  20                     per_cpu_nice[NR_CPUS],
  21                     per_cpu_system[NR_CPUS];
  22        unsigned int dk_drive[DK_MAX_MAJOR][DK_MAX_DISK];
  23        unsigned int dk_drive_rio[DK_MAX_MAJOR][DK_MAX_DISK];
  24        unsigned int dk_drive_wio[DK_MAX_MAJOR][DK_MAX_DISK];
  25        unsigned int dk_drive_rblk[DK_MAX_MAJOR][DK_MAX_DISK];
  26        unsigned int dk_drive_wblk[DK_MAX_MAJOR][DK_MAX_DISK];
  27        unsigned int pgpgin, pgpgout;
  28        unsigned int pswpin, pswpout;
  29#if defined (__hppa__) 
  30        unsigned int irqs[NR_CPUS][NR_IRQ_REGS][IRQ_PER_REGION];
  31#elif !defined(CONFIG_ARCH_S390)
  32        unsigned int irqs[NR_CPUS][NR_IRQS];
  33#endif
  34        unsigned int context_swtch;
  35};
  36
  37extern struct kernel_stat kstat;
  38
  39extern unsigned long nr_context_switches(void);
  40
  41#if defined (__hppa__) 
  42/*
  43 * Number of interrupts per specific IRQ source, since bootup
  44 */
  45static inline int kstat_irqs (int irq)
  46{
  47        int i, sum=0; 
  48
  49        for (i = 0 ; i < smp_num_cpus ; i++)
  50                sum += kstat.irqs[i][IRQ_REGION(irq)][IRQ_OFFSET(irq)];
  51 
  52        return sum;
  53}
  54#elif !defined(CONFIG_ARCH_S390)
  55/*
  56 * Number of interrupts per specific IRQ source, since bootup
  57 */
  58extern inline int kstat_irqs (int irq)
  59{
  60        int i, sum=0;
  61
  62        for (i = 0 ; i < smp_num_cpus ; i++)
  63                sum += kstat.irqs[cpu_logical_map(i)][irq];
  64
  65        return sum;
  66}
  67#endif
  68
  69#endif /* _LINUX_KERNEL_STAT_H */
  70