e3942ba040
On ia64 and powerpc, vtime context switch only consists in flushing system and user pending time, plus a few arch housekeeping. Consolidate that into a generic implementation. s390 is a special case because pending user and system time accounting there is hard to dissociate. So it's keeping its own implementation. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
109 lines
3 KiB
C
109 lines
3 KiB
C
/*
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* Definitions for measuring cputime on ia64 machines.
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*
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* Based on <asm-powerpc/cputime.h>.
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*
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* Copyright (C) 2007 FUJITSU LIMITED
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* Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in nsec.
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* Otherwise we measure cpu time in jiffies using the generic definitions.
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*/
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#ifndef __IA64_CPUTIME_H
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#define __IA64_CPUTIME_H
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING
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#include <asm-generic/cputime.h>
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#else
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#include <linux/time.h>
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#include <linux/jiffies.h>
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#include <asm/processor.h>
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typedef u64 __nocast cputime_t;
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typedef u64 __nocast cputime64_t;
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#define cputime_one_jiffy jiffies_to_cputime(1)
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/*
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* Convert cputime <-> jiffies (HZ)
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*/
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#define cputime_to_jiffies(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
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#define jiffies_to_cputime(__jif) \
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(__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
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#define cputime64_to_jiffies64(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
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#define jiffies64_to_cputime64(__jif) \
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(__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
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/*
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* Convert cputime <-> microseconds
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*/
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#define cputime_to_usecs(__ct) \
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((__force u64)(__ct) / NSEC_PER_USEC)
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#define usecs_to_cputime(__usecs) \
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(__force cputime_t)((__usecs) * NSEC_PER_USEC)
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#define usecs_to_cputime64(__usecs) \
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(__force cputime64_t)((__usecs) * NSEC_PER_USEC)
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/*
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* Convert cputime <-> seconds
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*/
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#define cputime_to_secs(__ct) \
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((__force u64)(__ct) / NSEC_PER_SEC)
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#define secs_to_cputime(__secs) \
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(__force cputime_t)((__secs) * NSEC_PER_SEC)
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/*
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* Convert cputime <-> timespec (nsec)
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*/
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static inline cputime_t timespec_to_cputime(const struct timespec *val)
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{
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u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
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return (__force cputime_t) ret;
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}
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static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
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{
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val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
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val->tv_nsec = (__force u64) ct % NSEC_PER_SEC;
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}
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/*
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* Convert cputime <-> timeval (msec)
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*/
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static inline cputime_t timeval_to_cputime(struct timeval *val)
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{
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u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
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return (__force cputime_t) ret;
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}
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static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
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{
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val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
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val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC;
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}
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/*
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* Convert cputime <-> clock (USER_HZ)
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*/
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#define cputime_to_clock_t(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ))
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#define clock_t_to_cputime(__x) \
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(__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
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/*
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* Convert cputime64 to clock.
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*/
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#define cputime64_to_clock_t(__ct) \
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cputime_to_clock_t((__force cputime_t)__ct)
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extern void arch_vtime_task_switch(struct task_struct *tsk);
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#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
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#endif /* __IA64_CPUTIME_H */
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