2 * Definitions for measuring cputime in nsecs resolution.
4 * Based on <arch/ia64/include/asm/cputime.h>
6 * Copyright (C) 2007 FUJITSU LIMITED
7 * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
16 #ifndef _ASM_GENERIC_CPUTIME_NSECS_H
17 #define _ASM_GENERIC_CPUTIME_NSECS_H
19 #include <linux/math64.h>
21 typedef u64 __nocast cputime_t
;
22 typedef u64 __nocast cputime64_t
;
24 #define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
26 #define cputime_one_jiffy jiffies_to_cputime(1)
28 #define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor)
29 #define cputime_div_rem(__ct, divisor, remainder) \
30 div_u64_rem((__force u64)__ct, divisor, remainder);
33 * Convert cputime <-> jiffies (HZ)
35 #define cputime_to_jiffies(__ct) \
36 cputime_div(__ct, NSEC_PER_SEC / HZ)
37 #define cputime_to_scaled(__ct) (__ct)
38 #define jiffies_to_cputime(__jif) \
39 (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
40 #define cputime64_to_jiffies64(__ct) \
41 cputime_div(__ct, NSEC_PER_SEC / HZ)
42 #define jiffies64_to_cputime64(__jif) \
43 (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
47 * Convert cputime <-> nanoseconds
49 #define cputime_to_nsecs(__ct) \
51 #define nsecs_to_cputime(__nsecs) \
52 (__force cputime_t)(__nsecs)
56 * Convert cputime <-> microseconds
58 #define cputime_to_usecs(__ct) \
59 cputime_div(__ct, NSEC_PER_USEC)
60 #define usecs_to_cputime(__usecs) \
61 (__force cputime_t)((__usecs) * NSEC_PER_USEC)
62 #define usecs_to_cputime64(__usecs) \
63 (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
66 * Convert cputime <-> seconds
68 #define cputime_to_secs(__ct) \
69 cputime_div(__ct, NSEC_PER_SEC)
70 #define secs_to_cputime(__secs) \
71 (__force cputime_t)((__secs) * NSEC_PER_SEC)
74 * Convert cputime <-> timespec (nsec)
76 static inline cputime_t
timespec_to_cputime(const struct timespec
*val
)
78 u64 ret
= val
->tv_sec
* NSEC_PER_SEC
+ val
->tv_nsec
;
79 return (__force cputime_t
) ret
;
81 static inline void cputime_to_timespec(const cputime_t ct
, struct timespec
*val
)
85 val
->tv_sec
= cputime_div_rem(ct
, NSEC_PER_SEC
, &rem
);
90 * Convert cputime <-> timeval (msec)
92 static inline cputime_t
timeval_to_cputime(const struct timeval
*val
)
94 u64 ret
= val
->tv_sec
* NSEC_PER_SEC
+ val
->tv_usec
* NSEC_PER_USEC
;
95 return (__force cputime_t
) ret
;
97 static inline void cputime_to_timeval(const cputime_t ct
, struct timeval
*val
)
101 val
->tv_sec
= cputime_div_rem(ct
, NSEC_PER_SEC
, &rem
);
102 val
->tv_usec
= rem
/ NSEC_PER_USEC
;
106 * Convert cputime <-> clock (USER_HZ)
108 #define cputime_to_clock_t(__ct) \
109 cputime_div(__ct, (NSEC_PER_SEC / USER_HZ))
110 #define clock_t_to_cputime(__x) \
111 (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
114 * Convert cputime64 to clock.
116 #define cputime64_to_clock_t(__ct) \
117 cputime_to_clock_t((__force cputime_t)__ct)
This page took 0.03471 seconds and 5 git commands to generate.