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For powerpc with CONFIG_VIRT_CPU_ACCOUNTING jiffies_to_cputime(1) is not compile time constant and run time calculations are quite expensive. To optimize we use precomputed value. For all other architectures is is preprocessor definition. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> LKML-Reference: <1248862529-6063-5-git-send-email-sgruszka@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
70 lines
2 KiB
C
70 lines
2 KiB
C
#ifndef _ASM_GENERIC_CPUTIME_H
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#define _ASM_GENERIC_CPUTIME_H
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#include <linux/time.h>
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#include <linux/jiffies.h>
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typedef unsigned long cputime_t;
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#define cputime_zero (0UL)
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#define cputime_one_jiffy jiffies_to_cputime(1)
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#define cputime_max ((~0UL >> 1) - 1)
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#define cputime_add(__a, __b) ((__a) + (__b))
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#define cputime_sub(__a, __b) ((__a) - (__b))
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#define cputime_div(__a, __n) ((__a) / (__n))
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#define cputime_halve(__a) ((__a) >> 1)
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#define cputime_eq(__a, __b) ((__a) == (__b))
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#define cputime_gt(__a, __b) ((__a) > (__b))
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#define cputime_ge(__a, __b) ((__a) >= (__b))
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#define cputime_lt(__a, __b) ((__a) < (__b))
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#define cputime_le(__a, __b) ((__a) <= (__b))
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#define cputime_to_jiffies(__ct) (__ct)
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#define cputime_to_scaled(__ct) (__ct)
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#define jiffies_to_cputime(__hz) (__hz)
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typedef u64 cputime64_t;
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#define cputime64_zero (0ULL)
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#define cputime64_add(__a, __b) ((__a) + (__b))
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#define cputime64_sub(__a, __b) ((__a) - (__b))
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#define cputime64_to_jiffies64(__ct) (__ct)
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#define jiffies64_to_cputime64(__jif) (__jif)
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#define cputime_to_cputime64(__ct) ((u64) __ct)
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/*
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* Convert cputime to milliseconds and back.
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*/
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#define cputime_to_msecs(__ct) jiffies_to_msecs(__ct)
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#define msecs_to_cputime(__msecs) msecs_to_jiffies(__msecs)
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/*
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* Convert cputime to seconds and back.
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*/
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#define cputime_to_secs(jif) ((jif) / HZ)
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#define secs_to_cputime(sec) ((sec) * HZ)
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/*
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* Convert cputime to timespec and back.
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*/
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#define timespec_to_cputime(__val) timespec_to_jiffies(__val)
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#define cputime_to_timespec(__ct,__val) jiffies_to_timespec(__ct,__val)
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/*
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* Convert cputime to timeval and back.
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*/
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#define timeval_to_cputime(__val) timeval_to_jiffies(__val)
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#define cputime_to_timeval(__ct,__val) jiffies_to_timeval(__ct,__val)
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/*
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* Convert cputime to clock and back.
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*/
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#define cputime_to_clock_t(__ct) jiffies_to_clock_t(__ct)
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#define clock_t_to_cputime(__x) clock_t_to_jiffies(__x)
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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) jiffies_64_to_clock_t(__ct)
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#endif
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