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 (__arm__)
118 #if defined(__ARM_ARCH_8A__)
120 clib_cpu_time_now (void) /* We may run arm64 in aarch32 mode, to leverage 64bit counter */
123 asm volatile ("mrrc p15, 0, %Q0, %R0, c9":"=r" (tsc));
126 #elif defined(__ARM_ARCH_7A__)
128 clib_cpu_time_now (void)
131 asm volatile ("mrc p15, 0, %0, c9, c13, 0":"=r" (tsc));
136 clib_cpu_time_now (void)
139 asm volatile ("mrc p15, 0, %[lo], c15, c12, 1":[lo] "=r" (lo));
144 #elif defined (__xtensa__)
148 clib_cpu_time_now (void)
153 #elif defined (__TMS320C6X__)
156 clib_cpu_time_now (void)
160 asm volatile (" dint\n"
162 " mvc .s2 TSCH,%1\n" " rint\n":"=b" (l), "=b" (h));
164 return ((u64) h << 32) | l;
167 #elif defined (__aarch64__)
169 clib_cpu_time_now (void)
173 /* Works on Cavium ThunderX. Other platforms: YMMV */
174 asm volatile ("mrs %0, cntvct_el0":"=r" (tsc));
180 #error "don't know how to read CPU time stamp"
184 void clib_time_verify_frequency (clib_time_t * c);
187 clib_time_now_internal (clib_time_t * c, u64 n)
189 u64 l = c->last_cpu_time;
190 u64 t = c->total_cpu_time;
192 c->total_cpu_time = t;
193 c->last_cpu_time = n;
196 c->last_verify_cpu_time) >> c->log2_clocks_per_frequency_verify))
197 clib_time_verify_frequency (c);
198 return t * c->seconds_per_clock;
202 clib_time_now (clib_time_t * c)
204 return clib_time_now_internal (c, clib_cpu_time_now ());
208 clib_cpu_time_wait (u64 dt)
210 u64 t_end = clib_cpu_time_now () + dt;
211 while (clib_cpu_time_now () < t_end)
215 void clib_time_init (clib_time_t * c);
220 #include <sys/time.h>
221 #include <sys/resource.h>
223 #include <sys/syscall.h>
225 /* Use 64bit floating point to represent time offset from epoch. */
229 /* clock_gettime without indirect syscall uses GLIBC wrappers which
230 we don't want. Just the bare metal, please. */
232 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
233 return ts.tv_sec + 1e-9 * ts.tv_nsec;
236 /* As above but integer number of nano-seconds. */
238 unix_time_now_nsec (void)
241 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
242 return 1e9 * ts.tv_sec + ts.tv_nsec;
246 unix_time_now_nsec_fraction (u32 * sec, u32 * nsec)
249 syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
255 unix_usage_now (void)
258 getrusage (RUSAGE_SELF, &u);
259 return u.ru_utime.tv_sec + 1e-6 * u.ru_utime.tv_usec
260 + u.ru_stime.tv_sec + 1e-6 * u.ru_stime.tv_usec;
266 struct timespec ts, tsrem;
268 ts.tv_nsec = 1e9 * (dt - (f64) ts.tv_sec);
270 while (nanosleep (&ts, &tsrem) < 0)
274 #else /* ! CLIB_UNIX */
283 unix_time_now_nsec (void)
289 unix_time_now_nsec_fraction (u32 * sec, u32 * nsec)
294 unix_usage_now (void)
306 #endif /* included_time_h */
309 * fd.io coding-style-patch-verification: ON
312 * eval: (c-set-style "gnu")