3 * Keyword benchmark, frontend
5 * (c) 2019 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the Sensible Object Design, an object system for C.
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.
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
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.
33 #if defined(__GNUC__) && (defined(__i386__) || defined(__amd64__))
35 typedef unsigned long long timer
;
36 static void init_timing(void) { ; }
37 static timer
when(void)
41 __asm__
__volatile__ ("rdtsc" : "=a"(lo
), "=d"(hi
));
42 return (((timer
)hi
<< 32) | lo
);
44 #elif defined(__linux__)
45 #include <linux/perf_event.h>
46 #include <asm/unistd.h>
50 typedef uint64_t timer
;
51 static int perf_fd
= -1;
52 static void init_timing(void)
54 struct perf_event_attr attr
= { 0 };
56 attr
.type
= PERF_TYPE_HARDWARE
;
57 attr
.size
= sizeof(attr
);
58 attr
.config
= PERF_COUNT_HW_CPU_CYCLES
;
60 attr
.exclude_kernel
= 1;
63 if ((perf_fd
= syscall(__NR_perf_event_open
, &attr
, 0, -1, -1, 0)) < 0)
64 perror("failed to open perf event");
66 static timer
when(void)
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;
87 static void init_timing(void) { ; }
88 static timer
when(void)
91 clock_gettime(CLOCK_THREAD_CPUTIME_ID
, &tv
);
92 return (1e9
*(timer
)tv
.tv_sec
+ tv
.tv_nsec
);
96 #define NITER 100000000
108 for (i
= 0; i
< NITER
; i
++) kwbench_trivial(&obj
, 4, 0, 0);
110 t
= t1
- t0
; printf("trivial: %g "TIMEWHAT
"\n", t
/NITER
);
113 for (i
= 0; i
< NITER
; i
++)
114 kwbench_keywords(&obj
, KWARGS(K(z
, 19)));
116 t
= t1
- t0
; printf("keywords: %g "TIMEWHAT
"\n", t
/NITER
);
121 /*----- That's all, folks -------------------------------------------------*/