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authorGlauber Costa <glommer@parallels.com>2011-11-28 14:45:17 -0200
committerIngo Molnar <mingo@elte.hu>2011-12-06 09:06:38 +0100
commit3292beb340c76884427faa1f5d6085719477d889 (patch)
treecb7e431b2a15fa66ef5278d485131bac7a125fbd /include
parent786d6dc7aeb2bfbfe417507b7beb83919f319db3 (diff)
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sched/accounting: Change cpustat fields to an array
This patch changes fields in cpustat from a structure, to an u64 array. Math gets easier, and the code is more flexible. Signed-off-by: Glauber Costa <glommer@parallels.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul Tuner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1322498719-2255-2-git-send-email-glommer@parallels.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kernel_stat.h36
1 files changed, 22 insertions, 14 deletions
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 0cce2db580c3..2fbd9053c2df 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -6,6 +6,7 @@
#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
+#include <linux/sched.h>
#include <asm/irq.h>
#include <asm/cputime.h>
@@ -15,21 +16,25 @@
* 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;
- cputime64_t guest_nice;
+enum cpu_usage_stat {
+ CPUTIME_USER,
+ CPUTIME_NICE,
+ CPUTIME_SYSTEM,
+ CPUTIME_SOFTIRQ,
+ CPUTIME_IRQ,
+ CPUTIME_IDLE,
+ CPUTIME_IOWAIT,
+ CPUTIME_STEAL,
+ CPUTIME_GUEST,
+ CPUTIME_GUEST_NICE,
+ NR_STATS,
+};
+
+struct kernel_cpustat {
+ u64 cpustat[NR_STATS];
};
struct kernel_stat {
- struct cpu_usage_stat cpustat;
#ifndef CONFIG_GENERIC_HARDIRQS
unsigned int irqs[NR_IRQS];
#endif
@@ -38,10 +43,13 @@ struct kernel_stat {
};
DECLARE_PER_CPU(struct kernel_stat, kstat);
+DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
-#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)
+#define kstat_this_cpu (&__get_cpu_var(kstat))
+#define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
+#define kstat_cpu(cpu) per_cpu(kstat, cpu)
+#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
extern unsigned long long nr_context_switches(void);