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15#include <stdio.h>
16#include <string.h>
17#include <unistd.h>
18#include <sys/syscall.h>
19#include <sys/time.h>
20#include <sys/types.h>
21#include <sys/wait.h>
22#include <stdlib.h>
23#include <pthread.h>
24
25#include "utils.h"
26
27
28#define PREEMPT_TIME 20
29
30
31
32
33#define THREAD_FACTOR 8
34
35
36
37
38
39
40__thread vector int varray[24] = {
41 {1, 2, 3, 4 }, {5, 6, 7, 8 }, {9, 10,11,12},
42 {13,14,15,16}, {17,18,19,20}, {21,22,23,24},
43 {25,26,27,28}, {29,30,31,32}, {33,34,35,36},
44 {37,38,39,40}, {41,42,43,44}, {45,46,47,48}
45};
46
47int threads_starting;
48int running;
49
50extern long preempt_vsx(vector int *varray, int *threads_starting, int *running);
51
52long vsx_memcmp(vector int *a) {
53 vector int zero = {0, 0, 0, 0};
54 int i;
55
56 FAIL_IF(a != varray);
57
58 for(i = 0; i < 12; i++) {
59 if (memcmp(&a[i + 12], &zero, sizeof(vector int)) == 0) {
60 fprintf(stderr, "Detected zero from the VSX reg %d\n", i + 12);
61 return 2;
62 }
63 }
64
65 if (memcmp(a, &a[12], 12 * sizeof(vector int))) {
66 long *p = (long *)a;
67 fprintf(stderr, "VSX mismatch\n");
68 for (i = 0; i < 24; i=i+2)
69 fprintf(stderr, "%d: 0x%08lx%08lx | 0x%08lx%08lx\n",
70 i/2 + i%2 + 20, p[i], p[i + 1], p[i + 24], p[i + 25]);
71 return 1;
72 }
73 return 0;
74}
75
76void *preempt_vsx_c(void *p)
77{
78 int i, j;
79 long rc;
80 srand(pthread_self());
81 for (i = 0; i < 12; i++)
82 for (j = 0; j < 4; j++) {
83 varray[i][j] = rand();
84
85 if (varray[i][j] == 0)
86 j--;
87 }
88 rc = preempt_vsx(varray, &threads_starting, &running);
89 if (rc == 2)
90 fprintf(stderr, "Caught zeros in VSX compares\n");
91 return (void *)rc;
92}
93
94int test_preempt_vsx(void)
95{
96 int i, rc, threads;
97 pthread_t *tids;
98
99 threads = sysconf(_SC_NPROCESSORS_ONLN) * THREAD_FACTOR;
100 tids = malloc(threads * sizeof(pthread_t));
101 FAIL_IF(!tids);
102
103 running = true;
104 threads_starting = threads;
105 for (i = 0; i < threads; i++) {
106 rc = pthread_create(&tids[i], NULL, preempt_vsx_c, NULL);
107 FAIL_IF(rc);
108 }
109
110 setbuf(stdout, NULL);
111
112 printf("\tWaiting for %d workers to start...", threads_starting);
113 while(threads_starting)
114 asm volatile("": : :"memory");
115 printf("done\n");
116
117 printf("\tWaiting for %d seconds to let some workers get preempted...", PREEMPT_TIME);
118 sleep(PREEMPT_TIME);
119 printf("done\n");
120
121 printf("\tStopping workers...");
122
123
124
125
126 running = 0;
127 for (i = 0; i < threads; i++) {
128 void *rc_p;
129 pthread_join(tids[i], &rc_p);
130
131
132
133
134
135 if ((long) rc_p)
136 printf("oops\n");
137 FAIL_IF((long) rc_p);
138 }
139 printf("done\n");
140
141 return 0;
142}
143
144int main(int argc, char *argv[])
145{
146 return test_harness(test_preempt_vsx, "vsx_preempt");
147}
148