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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-10-22 12:52:39 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-10-22 12:52:47 +0200
commitfae8b22d3e3e3a3d317a7746493997af02a3f35c (patch)
tree871aa91c51d713d7842ba1eb8661bde54d102842 /include
parent32346f47dd46bed291464e194a6c47da6fdd1bc3 (diff)
[S390] Add per-cpu idle time / idle count sysfs attributes.
Add two new sysfs entries per cpu: idle_count and idle_time. idle_count contains the number of times a cpu went into idle state. idle_time contains the time a cpu spent in idle state in microseconds. This can be used e.g. by powertop to tell how often idle state is entered and left. # cat /sys/devices/system/cpu/cpu0/idle_count 504 # cat /sys/devices/system/cpu/cpu0/idle_time 469734037 us Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-s390/cpu.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/asm-s390/cpu.h b/include/asm-s390/cpu.h
new file mode 100644
index 00000000000..352dde194f3
--- /dev/null
+++ b/include/asm-s390/cpu.h
@@ -0,0 +1,25 @@
+/*
+ * include/asm-s390/cpu.h
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_CPU_H_
+#define _ASM_S390_CPU_H_
+
+#include <linux/types.h>
+#include <linux/percpu.h>
+#include <linux/spinlock.h>
+
+struct s390_idle_data {
+ spinlock_t lock;
+ unsigned int in_idle;
+ unsigned long long idle_count;
+ unsigned long long idle_enter;
+ unsigned long long idle_time;
+};
+
+DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
+
+#endif /* _ASM_S390_CPU_H_ */