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>
45 /* Total run time in clock cycles
46 since clib_time_init call. */
49 /* Last recorded time stamp. */
52 /* CPU clock frequency. */
53 f64 clocks_per_second;
55 /* 1 / cpu clock frequency: conversion factor
56 from clock cycles into seconds. */
57 f64 seconds_per_clock;
59 /* Time stamp of call to clib_time_init call. */
62 u64 last_verify_cpu_time;
64 /* Same but for reference time (if present). */
65 f64 last_verify_reference_time;
67 u32 log2_clocks_per_second, log2_clocks_per_frequency_verify;
70 /* Return CPU time stamp as 64bit number. */
71 #if defined(__x86_64__) || defined(i386)
73 clib_cpu_time_now (void)
76 asm volatile ("rdtsc":"=a" (a), "=d" (d));
77 return (u64) a + ((u64) d << (u64) 32);
80 #elif defined (__powerpc64__)
83 clib_cpu_time_now (void)
86 asm volatile ("mftb %0":"=r" (t));
90 #elif defined (__SPU__)
93 clib_cpu_time_now (void)
96 return spu_rdch (0x8);
98 return 0 /* __builtin_si_rdch (0x8) FIXME */ ;
102 #elif defined (__powerpc__)
105 clib_cpu_time_now (void)
112 "cmpw %[hi1],%[hi2]\n"
113 "bne 1b\n":[hi1] "=r" (hi1),[hi2] "=r" (hi2),[lo] "=r" (lo));
114 return (u64) lo + ((u64) hi2 << (u64) 32);
117 #elif defined (__aarch64__)
119 clib_cpu_time_now (void)
122 /* User access to cntvct_el0 is enabled in Linux kernel since 3.12. */
123 asm volatile ("mrs %0, cntvct_el0":"=r" (vct));
127 #elif defined (__arm__)
128 #if defined(__ARM_ARCH_8A__)
130 clib_cpu_time_now (void) /* We may run arm64 in aarch32 mode, to leverage 64bit counter */
133 asm volatile ("mrrc p15, 0, %Q0, %R0, c9":"=r" (tsc));
136 #elif defined(__ARM_ARCH_7A__)
138 clib_cpu_time_now (void)
141 asm volatile ("mrc p15, 0, %0, c9, c13, 0":"=r" (tsc));
146 clib_cpu_time_now (void)
149 asm volatile ("mrc p15, 0, %[lo], c15, c12, 1":[lo] "=r" (lo));
154 #elif defined (__xtensa__)
158 clib_cpu_time_now (void)
163 #elif defined (__TMS320C6X__)
166 clib_cpu_time_now (void)
170 asm volatile (" dint\n"
172 " mvc .s2 TSCH,%1\n" " rint\n":"=b" (l), "=b" (h));
174 return ((u64) h << 32) | l;
178 #error "don't know how to read CPU time stamp"
182 void clib_time_verify_frequency (clib_time_t * c);
185 clib_time_now_internal (clib_time_t * c, u64 n)
187 u64 l = c->last_cpu_time;
188 u64 t = c->total_cpu_time;
190 c->total_cpu_time = t;
191 c->last_cpu_time = n;
194 c->last_verify_cpu_time) >> c->log2_clocks_per_frequency_verify))
195 clib_time_verify_frequency (c);
196 return t * c->seconds_per_clock;
200 clib_time_now (clib_time_t * c)
202 return clib_time_now_internal (c, clib_cpu_time_now ());
206 clib_cpu_time_wait (u64 dt)
208 u64 t_end = clib_cpu_time_now () + dt;
209 while (clib_cpu_time_now () < t_end)
213 void clib_time_init (clib_time_t * c);
218 #include <sys/time.h>
219 #include <sys/resource.h>
221 #include <sys/syscall.h>
223 /* Use 64bit floating point to represent time offset from epoch. */
227 /* clock_gettime without indirect syscall uses GLIBC wrappers which
228 we don't want. Just the bare metal, please. */
230 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
231 return ts.tv_sec + 1e-9 * ts.tv_nsec;
234 /* As above but integer number of nano-seconds. */
236 unix_time_now_nsec (void)
239 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
240 return 1e9 * ts.tv_sec + ts.tv_nsec;
244 unix_time_now_nsec_fraction (u32 * sec, u32 * nsec)
247 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
253 unix_usage_now (void)
256 getrusage (RUSAGE_SELF, &u);
257 return u.ru_utime.tv_sec + 1e-6 * u.ru_utime.tv_usec
258 + u.ru_stime.tv_sec + 1e-6 * u.ru_stime.tv_usec;
264 struct timespec ts, tsrem;
266 ts.tv_nsec = 1e9 * (dt - (f64) ts.tv_sec);
268 while (nanosleep (&ts, &tsrem) < 0)
272 #else /* ! CLIB_UNIX */
281 unix_time_now_nsec (void)
287 unix_time_now_nsec_fraction (u32 * sec, u32 * nsec)
292 unix_usage_now (void)
304 #endif /* included_time_h */
307 * fd.io coding-style-patch-verification: ON
310 * eval: (c-set-style "gnu")