Commit-ID: 39613766e8826756a4bf8c74274eb971c3c1d929
Gitweb: http://git.kernel.org/tip/39613766e8826756a4bf8c74274eb971c3c1d929
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Tue, 15 Jan 2013 13:25:07 +0100
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Sun, 27 Jan 2013 19:23:16 +0100
cputime: Librarize per nsecs resolution cputime definitions
The full dynticks cputime accounting that we'll soon introduce
will rely on sched_clock(). And its clock can have a per
nanosecond granularity.
To prepare for this, we need to have a cputime_t implementation
that has this precision.
ia64 virtual cputime accounting already uses that granularity
so all we need is to librarize its implementation in the asm
generic headers.
Also librarize the default per jiffy granularity cputime_t
as well so that we can easily pick either implementation
depending on the cputime accounting config we choose.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
---
arch/ia64/include/asm/cputime.h | 88 +---------------------
include/asm-generic/cputime.h | 62 +--------------
.../asm-generic/{cputime.h => cputime_jiffies.h} | 7 +-
.../asm-generic/cputime_nsecs.h | 23 ++----
4 files changed, 12 insertions(+), 168 deletions(-)
diff --git a/arch/ia64/include/asm/cputime.h b/arch/ia64/include/asm/cputime.h
index 7fcf7f0..040b316 100644
--- a/arch/ia64/include/asm/cputime.h
+++ b/arch/ia64/include/asm/cputime.h
@@ -19,91 +19,11 @@
#define __IA64_CPUTIME_H
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
-#include <asm-generic/cputime.h>
+# include <asm-generic/cputime.h>
#else
-
-#include <linux/time.h>
-#include <linux/jiffies.h>
-#include <asm/processor.h>
-
-typedef u64 __nocast cputime_t;
-typedef u64 __nocast cputime64_t;
-
-#define cputime_one_jiffy jiffies_to_cputime(1)
-
-/*
- * Convert cputime <-> jiffies (HZ)
- */
-#define cputime_to_jiffies(__ct) \
- ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
-#define jiffies_to_cputime(__jif) \
- (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
-#define cputime64_to_jiffies64(__ct) \
- ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
-#define jiffies64_to_cputime64(__jif) \
- (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
-
-/*
- * Convert cputime <-> microseconds
- */
-#define cputime_to_usecs(__ct) \
- ((__force u64)(__ct) / NSEC_PER_USEC)
-#define usecs_to_cputime(__usecs) \
- (__force cputime_t)((__usecs) * NSEC_PER_USEC)
-#define usecs_to_cputime64(__usecs) \
- (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
-
-/*
- * Convert cputime <-> seconds
- */
-#define cputime_to_secs(__ct) \
- ((__force u64)(__ct) / NSEC_PER_SEC)
-#define secs_to_cputime(__secs) \
- (__force cputime_t)((__secs) * NSEC_PER_SEC)
-
-/*
- * Convert cputime <-> timespec (nsec)
- */
-static inline cputime_t timespec_to_cputime(const struct timespec *val)
-{
- u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
- return (__force cputime_t) ret;
-}
-static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
-{
- val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
- val->tv_nsec = (__force u64) ct % NSEC_PER_SEC;
-}
-
-/*
- * Convert cputime <-> timeval (msec)
- */
-static inline cputime_t timeval_to_cputime(struct timeval *val)
-{
- u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
- return (__force cputime_t) ret;
-}
-static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
-{
- val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
- val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC;
-}
-
-/*
- * Convert cputime <-> clock (USER_HZ)
- */
-#define cputime_to_clock_t(__ct) \
- ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ))
-#define clock_t_to_cputime(__x) \
- (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
-
-/*
- * Convert cputime64 to clock.
- */
-#define cputime64_to_clock_t(__ct) \
- cputime_to_clock_t((__force cputime_t)__ct)
-
+# include <asm/processor.h>
+# include <asm-generic/cputime_nsecs.h>
extern void arch_vtime_task_switch(struct task_struct *tsk);
-
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
+
#endif /* __IA64_CPUTIME_H */
diff --git a/include/asm-generic/cputime.h b/include/asm-generic/cputime.h
index 9a62937..c6eddf5 100644
--- a/include/asm-generic/cputime.h
+++ b/include/asm-generic/cputime.h
@@ -4,66 +4,6 @@
#include <linux/time.h>
#include <linux/jiffies.h>
-typedef unsigned long __nocast cputime_t;
-
-#define cputime_one_jiffy jiffies_to_cputime(1)
-#define cputime_to_jiffies(__ct) (__force unsigned long)(__ct)
-#define cputime_to_scaled(__ct) (__ct)
-#define jiffies_to_cputime(__hz) (__force cputime_t)(__hz)
-
-typedef u64 __nocast cputime64_t;
-
-#define cputime64_to_jiffies64(__ct) (__force u64)(__ct)
-#define jiffies64_to_cputime64(__jif) (__force cputime64_t)(__jif)
-
-#define nsecs_to_cputime64(__ct) \
- jiffies64_to_cputime64(nsecs_to_jiffies64(__ct))
-
-
-/*
- * Convert cputime to microseconds and back.
- */
-#define cputime_to_usecs(__ct) \
- jiffies_to_usecs(cputime_to_jiffies(__ct))
-#define usecs_to_cputime(__usec) \
- jiffies_to_cputime(usecs_to_jiffies(__usec))
-#define usecs_to_cputime64(__usec) \
- jiffies64_to_cputime64(nsecs_to_jiffies64((__usec) * 1000))
-
-/*
- * Convert cputime to seconds and back.
- */
-#define cputime_to_secs(jif) (cputime_to_jiffies(jif) / HZ)
-#define secs_to_cputime(sec) jiffies_to_cputime((sec) * HZ)
-
-/*
- * Convert cputime to timespec and back.
- */
-#define timespec_to_cputime(__val) \
- jiffies_to_cputime(timespec_to_jiffies(__val))
-#define cputime_to_timespec(__ct,__val) \
- jiffies_to_timespec(cputime_to_jiffies(__ct),__val)
-
-/*
- * Convert cputime to timeval and back.
- */
-#define timeval_to_cputime(__val) \
- jiffies_to_cputime(timeval_to_jiffies(__val))
-#define cputime_to_timeval(__ct,__val) \
- jiffies_to_timeval(cputime_to_jiffies(__ct),__val)
-
-/*
- * Convert cputime to clock and back.
- */
-#define cputime_to_clock_t(__ct) \
- jiffies_to_clock_t(cputime_to_jiffies(__ct))
-#define clock_t_to_cputime(__x) \
- jiffies_to_cputime(clock_t_to_jiffies(__x))
-
-/*
- * Convert cputime64 to clock.
- */
-#define cputime64_to_clock_t(__ct) \
- jiffies_64_to_clock_t(cputime64_to_jiffies64(__ct))
+#include <asm-generic/cputime_jiffies.h>
#endif
diff --git a/include/asm-generic/cputime.h b/include/asm-generic/cputime_jiffies.h
similarity index 93%
copy from include/asm-generic/cputime.h
copy to include/asm-generic/cputime_jiffies.h
index 9a62937..b747f1f 100644
--- a/include/asm-generic/cputime.h
+++ b/include/asm-generic/cputime_jiffies.h
@@ -1,8 +1,5 @@
-#ifndef _ASM_GENERIC_CPUTIME_H
-#define _ASM_GENERIC_CPUTIME_H
-
-#include <linux/time.h>
-#include <linux/jiffies.h>
+#ifndef _ASM_GENERIC_CPUTIME_JIFFIES_H
+#define _ASM_GENERIC_CPUTIME_JIFFIES_H
typedef unsigned long __nocast cputime_t;
diff --git a/arch/ia64/include/asm/cputime.h b/include/asm-generic/cputime_nsecs.h
similarity index 81%
copy from arch/ia64/include/asm/cputime.h
copy to include/asm-generic/cputime_nsecs.h
index 7fcf7f0..c73d182 100644
--- a/arch/ia64/include/asm/cputime.h
+++ b/include/asm-generic/cputime_nsecs.h
@@ -1,7 +1,7 @@
/*
- * Definitions for measuring cputime on ia64 machines.
+ * Definitions for measuring cputime in nsecs resolution.
*
- * Based on <asm-powerpc/cputime.h>.
+ * Based on <arch/ia64/include/asm/cputime.h>
*
* Copyright (C) 2007 FUJITSU LIMITED
* Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
@@ -11,20 +11,10 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
- * If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in nsec.
- * Otherwise we measure cpu time in jiffies using the generic definitions.
*/
-#ifndef __IA64_CPUTIME_H
-#define __IA64_CPUTIME_H
-
-#ifndef CONFIG_VIRT_CPU_ACCOUNTING
-#include <asm-generic/cputime.h>
-#else
-
-#include <linux/time.h>
-#include <linux/jiffies.h>
-#include <asm/processor.h>
+#ifndef _ASM_GENERIC_CPUTIME_NSECS_H
+#define _ASM_GENERIC_CPUTIME_NSECS_H
typedef u64 __nocast cputime_t;
typedef u64 __nocast cputime64_t;
@@ -103,7 +93,4 @@ static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
#define cputime64_to_clock_t(__ct) \
cputime_to_clock_t((__force cputime_t)__ct)
-extern void arch_vtime_task_switch(struct task_struct *tsk);
-
-#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
-#endif /* __IA64_CPUTIME_H */
+#endif
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|