include/linux/kernel_stat.h

   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
  18 struct 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(CONFIG_ARCH_S390)
  30         unsigned int irqs[NR_CPUS][NR_IRQS];
  31 #endif
  32         unsigned int ipackets, opackets;
  33         unsigned int ierrors, oerrors;
  34         unsigned int collisions;
  35         unsigned int context_swtch;
  36 };
  37
  38 extern struct kernel_stat kstat;
  39
  40 #if !defined(CONFIG_ARCH_S390)
  41 /*
  42  * Number of interrupts per specific IRQ source, since bootup
  43  */
  44 extern inline int kstat_irqs (int irq)
  45 {
  46         int i, sum=0;
  47
  48         for (i = 0 ; i < smp_num_cpus ; i++)
  49                 sum += kstat.irqs[cpu_logical_map(i)][irq];
  50
  51         return sum;
  52 }
  53 #endif
  54
  55 #endif /* _LINUX_KERNEL_STAT_H */