mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 19:56:18 +00:00
6859a84029
On machines with very large numbers of cpus, tables that are dimensioned by NR_IRQS get very large, especially the irq_desc table. They are also very sparsely used. When the cpu count is > MAX_IO_APICS, use MAX_IO_APICS to set NR_IRQS, otherwise use NR_CPUS. Signed-off-by: Alan Mayer <ajm@sgi.com> Reviewed-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#ifndef _LINUX_KERNEL_STAT_H
|
|
#define _LINUX_KERNEL_STAT_H
|
|
|
|
#include <linux/smp.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/cpumask.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/cputime.h>
|
|
|
|
/*
|
|
* 'kernel_stat.h' contains the definitions needed for doing
|
|
* some kernel statistics (CPU usage, context switches ...),
|
|
* used by rstatd/perfmeter
|
|
*/
|
|
|
|
struct cpu_usage_stat {
|
|
cputime64_t user;
|
|
cputime64_t nice;
|
|
cputime64_t system;
|
|
cputime64_t softirq;
|
|
cputime64_t irq;
|
|
cputime64_t idle;
|
|
cputime64_t iowait;
|
|
cputime64_t steal;
|
|
cputime64_t guest;
|
|
};
|
|
|
|
struct kernel_stat {
|
|
struct cpu_usage_stat cpustat;
|
|
unsigned int irqs[NR_IRQS];
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct kernel_stat, kstat);
|
|
|
|
#define kstat_cpu(cpu) per_cpu(kstat, cpu)
|
|
/* Must have preemption disabled for this to be meaningful. */
|
|
#define kstat_this_cpu __get_cpu_var(kstat)
|
|
|
|
extern unsigned long long nr_context_switches(void);
|
|
|
|
/*
|
|
* Number of interrupts per specific IRQ source, since bootup
|
|
*/
|
|
static inline int kstat_irqs(int irq)
|
|
{
|
|
int cpu, sum = 0;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
sum += kstat_cpu(cpu).irqs[irq];
|
|
|
|
return sum;
|
|
}
|
|
|
|
extern void account_user_time(struct task_struct *, cputime_t);
|
|
extern void account_user_time_scaled(struct task_struct *, cputime_t);
|
|
extern void account_system_time(struct task_struct *, int, cputime_t);
|
|
extern void account_system_time_scaled(struct task_struct *, cputime_t);
|
|
extern void account_steal_time(struct task_struct *, cputime_t);
|
|
|
|
#endif /* _LINUX_KERNEL_STAT_H */
|