test/testvm.c

   1 /* testvm - service-started code that goes with test73.o
   2  */
   3
   4 #include <minix/drivers.h>
   5 #include <minix/chardriver.h>
   6 #include <minix/ds.h>
   7 #include <sys/stat.h>
   8 #include <sys/mman.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <fcntl.h>
  12
  13 #include "testvm.h"
  14 #include "common.h"
  15 #include "testcache.h"
  16
  17 #define MYMAJOR 40      /* doesn't really matter, shouldn't be NO_DEV though */
  18 #define MYDEV   makedev(MYMAJOR, 1)
  19
  20 static char *pipefilename = NULL, *progname;
  21 int pipefd = -1;
  22
  23 int memfd;
  24
  25 static char *bdata = NULL;
  26
  27 int dowriteblock(int b, int blocksize, u32_t seed, char *block)
  28 {
  29         int r;
  30         char *bdata;
  31         int mustset = 0;
  32         u64_t dev_off = (u64_t) b * blocksize;
  33
  34         if((bdata = vm_map_cacheblock(MYDEV, dev_off,
  35                 VMC_NO_INODE, 0, NULL, blocksize)) == MAP_FAILED) {
  36                 if((bdata = mmap(0, blocksize,
  37                        PROT_READ|PROT_WRITE, MAP_ANON, -1, 0)) == MAP_FAILED) {
  38                         printf("mmap failed\n");
  39                         exit(1);
  40                 }
  41                 mustset = 1;
  42         }
  43
  44         memcpy(bdata, block, blocksize);
  45
  46         if(mustset && (r=vm_set_cacheblock(bdata, MYDEV, dev_off,
  47                 VMC_NO_INODE, 0, NULL, blocksize)) != OK) {
  48                 printf("dowriteblock: vm_set_cacheblock failed %d\n", r);
  49                 exit(1);
  50         }
  51
  52         if(munmap(bdata, blocksize) < 0) {
  53                 printf("dowriteblock: munmap failed %d\n", r);
  54                 exit(1);
  55         }
  56
  57         return blocksize;
  58 }
  59
  60 int readblock(int b, int blocksize, u32_t seed, char *block)
  61 {
  62         char *bdata;
  63         u64_t dev_off = (u64_t) b * blocksize;
  64
  65         if((bdata = vm_map_cacheblock(MYDEV, dev_off,
  66                 VMC_NO_INODE, 0, NULL, blocksize)) == MAP_FAILED) {
  67                 return OK_BLOCK_GONE;
  68         }
  69
  70         memcpy(block, bdata, blocksize);
  71
  72         if(munmap(bdata, blocksize) < 0) {
  73                 printf("dowriteblock: munmap failed\n");
  74                 exit(1);
  75         }
  76
  77         return blocksize;
  78 }
  79
  80 void testend(void) { }
  81
  82 static void
  83 writepipe(struct info *i)
  84 {
  85         if(write(pipefd, i, sizeof(*i)) != sizeof(*i)) {
  86                 printf("%s: pipe write failed\n", progname);
  87                 exit(1);
  88         }
  89 }
  90
  91 static int
  92 testinit(void)
  93 {
  94         struct stat st;
  95         int attempts = 0;
  96
  97         for(attempts = 0; attempts < 5 && pipefd < 0; attempts++) {
  98                 if(attempts > 0) sleep(1);
  99                 pipefd = open(pipefilename, O_WRONLY | O_NONBLOCK);
 100         }
 101
 102         if(pipefd < 0) {
 103                 printf("%s: could not open pipe %s, errno %d\n",
 104                         progname, pipefilename, errno);
 105                 exit(1);
 106         }
 107
 108         if(fstat(pipefd, &st) < 0) {
 109                 printf("%s: could not fstat pipe %s\n", progname, pipefilename);
 110                 exit(1);
 111         }
 112
 113         if(!(st.st_mode & I_NAMED_PIPE)) {
 114                 printf("%s: file %s is not a pipe\n", progname, pipefilename);
 115                 exit(1);
 116         }
 117
 118         return OK;
 119 }
 120
 121 static int
 122 sef_cb_init(int type, sef_init_info_t *UNUSED(info))
 123 {
 124         return OK;
 125 }
 126
 127 static void
 128 init(void)
 129 {
 130         /* SEF init */
 131         sef_setcb_init_fresh(sef_cb_init);
 132         sef_setcb_init_lu(sef_cb_init);
 133         sef_setcb_init_restart(sef_cb_init);
 134
 135         sef_startup();
 136 }
 137
 138
 139
 140 int
 141 main(int argc, char *argv[])
 142 {
 143         struct info info;
 144         int big;
 145         u32_t totalmem, freemem, cachedmem;
 146
 147         progname = argv[0];
 148
 149         if(argc < 2) { printf("no args\n"); return 1; }
 150
 151         pipefilename=argv[1];
 152
 153         big = !!strstr(pipefilename, "big");
 154
 155         init();
 156
 157         info.result = time(NULL);
 158
 159         if(testinit() != OK) { printf("%s: testinit failed\n", progname); return 1; }
 160
 161         cachequiet(!big);
 162
 163         if(!(bdata = alloc_contig(PAGE_SIZE, 0, NULL))) {
 164                 printf("could not allocate block\n");
 165                 exit(1);
 166         }
 167
 168         if(dotest(PAGE_SIZE,       10, 3)) { e(11); exit(1); }
 169         if(dotest(PAGE_SIZE,     1000, 3)) { e(11); exit(1); }
 170         if(dotest(PAGE_SIZE,    50000, 3)) { e(11); exit(1); }
 171         if(big) {
 172                 getmem(&totalmem, &freemem, &cachedmem);
 173                 if(dotest(PAGE_SIZE, totalmem*1.5, 3)) { e(11); exit(1); }
 174         }
 175
 176         info.result = 0;
 177
 178         writepipe(&info);
 179
 180         vm_clear_cache(MYDEV);
 181
 182         return 0;
 183 }
 184