include/linux/kernel_stat.h

   1 #ifndef _LINUX_KERNEL_STAT_H
   2 #define _LINUX_KERNEL_STAT_H
   3
   4 #include <asm/irq.h>
   5 #include <linux/smp.h>
   6 #include <linux/threads.h>
   7
   8 /*
   9  * 'kernel_stat.h' contains the definitions needed for doing
  10  * some kernel statistics (CPU usage, context switches ...),
  11  * used by rstatd/perfmeter
  12  */
  13
  14 #define DK_NDRIVE 4
  15
  16 struct kernel_stat {
  17         unsigned int cpu_user, cpu_nice, cpu_system;
  18         unsigned int per_cpu_user[NR_CPUS],
  19                      per_cpu_nice[NR_CPUS],
  20                      per_cpu_system[NR_CPUS];
  21         unsigned int dk_drive[DK_NDRIVE];
  22         unsigned int dk_drive_rio[DK_NDRIVE];
  23         unsigned int dk_drive_wio[DK_NDRIVE];
  24         unsigned int dk_drive_rblk[DK_NDRIVE];
  25         unsigned int dk_drive_wblk[DK_NDRIVE];
  26         unsigned int pgpgin, pgpgout;
  27         unsigned int pswpin, pswpout;
  28         unsigned int irqs[NR_CPUS][NR_IRQS];
  29         unsigned int ipackets, opackets;
  30         unsigned int ierrors, oerrors;
  31         unsigned int collisions;
  32         unsigned int context_swtch;
  33 };
  34
  35 extern struct kernel_stat kstat;
  36
  37 /*
  38  * Number of interrupts per specific IRQ source, since bootup
  39  */
  40 extern inline int kstat_irqs (int irq)
  41 {
  42         int i, sum=0;
  43
  44         for (i = 0 ; i < smp_num_cpus ; i++)
  45                 sum += kstat.irqs[cpu_logical_map(i)][irq];
  46
  47         return sum;
  48 }
  49
  50 #endif /* _LINUX_KERNEL_STAT_H */