2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
18 Permission is hereby granted, free of charge, to any person obtaining
19 a copy of this software and associated documentation files (the
20 "Software"), to deal in the Software without restriction, including
21 without limitation the rights to use, copy, modify, merge, publish,
22 distribute, sublicense, and/or sell copies of the Software, and to
23 permit persons to whom the Software is furnished to do so, subject to
24 the following conditions:
26 The above copyright notice and this permission notice shall be
27 included in all copies or substantial portions of the Software.
29 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #ifndef included_time_h
39 #define included_time_h
41 #include <vppinfra/clib.h>
44 /* Total run time in clock cycles
45 since clib_time_init call. */
48 /* Last recorded time stamp. */
51 /* CPU clock frequency. */
52 f64 clocks_per_second;
54 /* 1 / cpu clock frequency: conversion factor
55 from clock cycles into seconds. */
56 f64 seconds_per_clock;
58 /* Time stamp of call to clib_time_init call. */
61 u64 last_verify_cpu_time;
63 /* Same but for reference time (if present). */
64 f64 last_verify_reference_time;
66 u32 log2_clocks_per_second, log2_clocks_per_frequency_verify;
69 /* Return CPU time stamp as 64bit number. */
70 #if defined(__x86_64__) || defined(i386)
71 always_inline u64 clib_cpu_time_now (void)
75 : "=a" (a), "=d" (d));
76 return (u64) a + ((u64) d << (u64) 32);
79 #elif defined (__powerpc64__)
81 always_inline u64 clib_cpu_time_now (void)
84 asm volatile ("mftb %0" : "=r" (t));
88 #elif defined (__SPU__)
90 always_inline u64 clib_cpu_time_now (void)
93 return spu_rdch (0x8);
95 return 0 /* __builtin_si_rdch (0x8) FIXME */;
99 #elif defined (__powerpc__)
101 always_inline u64 clib_cpu_time_now (void)
109 "cmpw %[hi1],%[hi2]\n"
111 : [hi1] "=r" (hi1), [hi2] "=r" (hi2), [lo] "=r" (lo));
112 return (u64) lo + ((u64) hi2 << (u64) 32);
115 #elif defined (__arm__)
116 #if defined(__ARM_ARCH_8A__)
117 always_inline u64 clib_cpu_time_now (void) /* We may run arm64 in aarch32 mode, to leverage 64bit counter */
120 asm volatile("mrrc p15, 0, %Q0, %R0, c9" : "=r" (tsc));
123 #elif defined(__ARM_ARCH_7A__)
124 always_inline u64 clib_cpu_time_now (void)
127 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (tsc));
131 always_inline u64 clib_cpu_time_now (void)
134 asm volatile ("mrc p15, 0, %[lo], c15, c12, 1"
140 #elif defined (__xtensa__)
143 always_inline u64 clib_cpu_time_now (void)
146 #elif defined (__TMS320C6X__)
148 always_inline u64 clib_cpu_time_now (void)
152 asm volatile (" dint\n"
156 : "=b" (l), "=b" (h));
158 return ((u64)h << 32) | l;
161 #elif defined (__aarch64__)
162 always_inline u64 clib_cpu_time_now (void)
166 /* Works on Cavium ThunderX. Other platforms: YMMV */
167 asm volatile("mrs %0, cntvct_el0" : "=r" (tsc));
173 #error "don't know how to read CPU time stamp"
177 void clib_time_verify_frequency (clib_time_t * c);
179 always_inline f64 clib_time_now_internal (clib_time_t * c, u64 n)
181 u64 l = c->last_cpu_time;
182 u64 t = c->total_cpu_time;
184 c->total_cpu_time = t;
185 c->last_cpu_time = n;
186 if (PREDICT_FALSE ((c->last_cpu_time - c->last_verify_cpu_time) >> c->log2_clocks_per_frequency_verify))
187 clib_time_verify_frequency (c);
188 return t * c->seconds_per_clock;
192 clib_time_now (clib_time_t * c)
194 return clib_time_now_internal (c, clib_cpu_time_now());
197 always_inline void clib_cpu_time_wait (u64 dt)
199 u64 t_end = clib_cpu_time_now () + dt;
200 while (clib_cpu_time_now () < t_end)
204 void clib_time_init (clib_time_t * c);
209 #include <sys/time.h>
210 #include <sys/resource.h>
212 #include <sys/syscall.h>
214 /* Use 64bit floating point to represent time offset from epoch. */
215 always_inline f64 unix_time_now (void)
217 /* clock_gettime without indirect syscall uses GLIBC wrappers which
218 we don't want. Just the bare metal, please. */
220 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
221 return ts.tv_sec + 1e-9*ts.tv_nsec;
224 /* As above but integer number of nano-seconds. */
225 always_inline u64 unix_time_now_nsec (void)
228 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
229 return 1e9*ts.tv_sec + ts.tv_nsec;
232 always_inline f64 unix_usage_now (void)
235 getrusage (RUSAGE_SELF, &u);
236 return u.ru_utime.tv_sec + 1e-6*u.ru_utime.tv_usec
237 + u.ru_stime.tv_sec + 1e-6*u.ru_stime.tv_usec;
240 always_inline void unix_sleep (f64 dt)
244 t.tv_nsec = 1e9 * dt;
248 #else /* ! CLIB_UNIX */
250 always_inline f64 unix_time_now (void)
253 always_inline u64 unix_time_now_nsec (void)
256 always_inline f64 unix_usage_now (void)
259 always_inline void unix_sleep (f64 dt)
264 #endif /* included_time_h */