minix/tests/test71.c

   1 /* Test 71 - full hierachy storage test.
   2  *
   3  * Black box test of storage: test consistent file contents
   4  * under various working sets and access patterns.
   5  *
   6  * Using varying working set sizes, exercise various cache
   7  * layers separately.
   8  *
   9  * There is a 'smoke test' mode, suitable for running interactively,
  10  * and a 'regression test' (big) mode, meant for batch invocation only
  11  * as it takes very long.
  12  */
  13
  14 #include <sys/types.h>
  15 #include <sys/ioc_memory.h>
  16 #include <stdio.h>
  17 #include <assert.h>
  18 #include <string.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22
  23 #include "common.h"
  24 #include "testcache.h"
  25
  26 int
  27 dowriteblock(int b, int blocksize, u32_t seed, char *data)
  28 {
  29         u64_t offset;
  30         int fd;
  31
  32         get_fd_offset(b, blocksize, &offset, &fd);
  33
  34         if(pwrite(fd, data, blocksize, offset) < blocksize) {
  35                 perror("pwrite");
  36                 return -1;
  37         }
  38
  39         return blocksize;
  40 }
  41
  42 int
  43 readblock(int b, int blocksize, u32_t seed, char *data)
  44 {
  45         u64_t offset;
  46         int fd;
  47
  48         get_fd_offset(b, blocksize, &offset, &fd);
  49
  50         if(pread(fd, data, blocksize, offset) < blocksize) {
  51                 perror("pread");
  52                 return -1;
  53         }
  54
  55         return blocksize;
  56 }
  57
  58 void testend(void) { }
  59
  60 int
  61 main(int argc, char *argv[])
  62 {
  63         int iter = 2;
  64
  65         start(71);
  66
  67         cachequiet(!bigflag);
  68         if(bigflag) iter = 3;
  69
  70         makefiles(MAXFILES);
  71
  72         /* Try various combinations working set sizes
  73          * and block sizes in order to specifically
  74          * target the primary cache, then primary+secondary
  75          * cache, then primary+secondary cache+secondary
  76          * cache eviction.
  77          */
  78
  79         if(dotest(PAGE_SIZE,    100, iter)) e(5);
  80         if(dotest(PAGE_SIZE*2,  100, iter)) e(2);
  81         if(dotest(PAGE_SIZE*3,  100, iter)) e(3);
  82         if(dotest(PAGE_SIZE,  20000, iter)) e(5);
  83
  84         if(bigflag) {
  85                 u32_t totalmem, freemem, cachedmem;
  86                 if(dotest(PAGE_SIZE,  150000, iter)) e(5);
  87                 getmem(&totalmem, &freemem, &cachedmem);
  88                 if(dotest(PAGE_SIZE,  totalmem*1.5, iter)) e(6);
  89         }
  90
  91         quit();
  92
  93         return 0;
  94 }
  95