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118ae0a7 MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Keyword benchmark, frontend | |
4 | * | |
5 | * (c) 2019 Straylight/Edgeware | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of the Sensible Object Design, an object system for C. | |
11 | * | |
12 | * SOD is free software: you can redistribute it and/or modify it under | |
13 | * the terms of the GNU General Public License as published by the Free | |
14 | * Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | * | |
17 | * SOD is distributed in the hope that it will be useful, but WITHOUT ANY | |
18 | * WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with SOD. If not, write to the Free Software Foundation, Inc., | |
24 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
26 | ||
27 | #include <stdint.h> | |
28 | #include <stdio.h> | |
29 | ||
30 | #include "keyword.h" | |
31 | #include "kwbench.h" | |
32 | ||
33 | #if defined(__GNUC__) && (defined(__i386__) || defined(__amd64__)) | |
34 | #define TIMEWHAT "cy" | |
35 | typedef unsigned long long timer; | |
36 | static void init_timing(void) { ; } | |
37 | static timer when(void) | |
38 | { | |
39 | uint32_t lo, hi; | |
40 | ||
41 | __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi)); | |
42 | return (((timer)hi << 32) | lo); | |
43 | } | |
44 | #elif defined(__linux__) | |
45 | #include <linux/perf_event.h> | |
46 | #include <asm/unistd.h> | |
47 | #include <unistd.h> | |
48 | ||
49 | #define TIMEWHAT "cy" | |
50 | typedef uint64_t timer; | |
51 | static int perf_fd = -1; | |
52 | static void init_timing(void) | |
53 | { | |
54 | struct perf_event_attr attr = { 0 }; | |
55 | ||
56 | attr.type = PERF_TYPE_HARDWARE; | |
57 | attr.size = sizeof(attr); | |
58 | attr.config = PERF_COUNT_HW_CPU_CYCLES; | |
59 | attr.disabled = 0; | |
60 | attr.exclude_kernel = 1; | |
61 | attr.exclude_hv = 1; | |
62 | ||
63 | if ((perf_fd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0)) < 0) | |
64 | perror("failed to open perf event"); | |
65 | } | |
66 | static timer when(void) | |
67 | { | |
68 | timer cy; | |
69 | ssize_t n; | |
70 | ||
71 | if (perf_fd == -1) goto fail; | |
72 | n = read(perf_fd, &cy, sizeof(cy)); | |
73 | if (n != sizeof(cy)) { | |
74 | if (n < 0) perror("failed to read perf event"); | |
75 | else fprintf(stderr, "unexpected short read from perf event\n"); | |
76 | close(perf_fd); perf_fd = -1; | |
77 | goto fail; | |
78 | } | |
79 | return (cy); | |
80 | fail: | |
81 | return (0); | |
82 | } | |
83 | #else | |
84 | #include <time.h> | |
85 | #define TIMEWHAT "ns" | |
86 | typedef double timer; | |
87 | static void init_timing(void) { ; } | |
88 | static timer when(void) | |
89 | { | |
90 | struct timespec tv; | |
91 | clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tv); | |
92 | return (1e9*(timer)tv.tv_sec + tv.tv_nsec); | |
93 | } | |
94 | #endif | |
95 | ||
96 | #define NITER 100000000 | |
97 | ||
98 | int main(void) | |
99 | { | |
100 | timer t0, t1; | |
101 | double t; | |
102 | int i; | |
103 | struct myobject obj; | |
104 | ||
105 | init_timing(); | |
106 | ||
107 | t0 = when(); | |
108 | for (i = 0; i < NITER; i++) kwbench_trivial(&obj, 4, 0, 0); | |
109 | t1 = when(); | |
110 | t = t1 - t0; printf("trivial: %g "TIMEWHAT"\n", t/NITER); | |
111 | ||
112 | t0 = when(); | |
113 | for (i = 0; i < NITER; i++) | |
114 | kwbench_keywords(&obj, KWARGS(K(z, 19))); | |
115 | t1 = when(); | |
116 | t = t1 - t0; printf("keywords: %g "TIMEWHAT"\n", t/NITER); | |
117 | ||
118 | return (0); | |
119 | } | |
120 | ||
121 | /*----- That's all, folks -------------------------------------------------*/ |