1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <signal.h>
#include "litmus.h"
typedef struct {
char * exec_path;
char ** argv;
} startup_info_t;
int launch(void *task_info_p) {
startup_info_t *info = (startup_info_t*) task_info_p;
int ret;
ret = execvp(info->exec_path, info->argv);
perror("execv failed");
return ret;
}
void usage(char *error) {
fprintf(stderr, "%s\nUsage: \nlaunch_rt supports one of two modes:\n"
"\n\tlaunch_rt <SPORADIC OPTIONS> <wcet> <period> program arg1 arg2 ...\n"
"\nwhere:"
"\n\t <SPORADIC OPTIONS> = "
"[-c {hrt|srt|be}] [-p <cpu>]\n"
"\nExamples:"
"\n\trt_launch -p 2 10 100 cpu_job"
"\n\t => Launch cpu_job a hard real-time task with "
"\n\t period 100ms and weight 0.1 on CPU 2.\n"
"\n\n",
error);
exit(1);
}
#define OPTSTR "p:c:v"
#define NS_PER_MS 1000000
int main(int argc, char** argv)
{
int ret;
int wcet;
int period;
int cpu = 0;
int opt;
int verbose = 0;
startup_info_t info;
task_class_t class = RT_CLASS_HARD;
while ((opt = getopt(argc, argv, OPTSTR)) != -1) {
switch (opt) {
case 'v':
verbose = 1;
break;
case 'p':
cpu = atoi(optarg);
break;
case 'c':
class = str2class(optarg);
if (class == -1)
usage("Unknown task class.");
break;
case ':':
usage("Argument missing.");
break;
case '?':
default:
usage("Bad argument.");
break;
}
}
signal(SIGUSR1, SIG_IGN);
if (argc - optind < 3)
usage("Arguments missing.");
wcet = atoi(argv[optind + 0]) * NS_PER_MS;
period = atoi(argv[optind + 1]) * NS_PER_MS;
if (wcet <= 0)
usage("The worst-case execution time must be a "
"positive number.");
if (period <= 0)
usage("The period must be a positive number.");
if (wcet > period) {
usage("The worst-case execution time must not "
"exceed the period.");
}
info.exec_path = argv[optind + 2];
info.argv = argv + optind + 2;
ret = __create_rt_task(launch, &info, cpu, wcet, period, class);
if (ret < 0) {
perror("Could not create rt child process");
return 2;
} else if (verbose)
printf("%d\n", ret);
return 0;
}
|
