void memtest_test(size_t megabytes, int passes) {
size_t bytes = megabytes*1024*1024;
unsigned long *m = malloc(bytes);
int pass = 0;
if (m == NULL) {
fprintf(stderr,"Unable to allocate %zu megabytes: %s",
megabytes, strerror(errno));
exit(1);
}
while (pass != passes) {
pass++;
memtest_progress_start("Addressing test",pass);
memtest_addressing(m,bytes);
memtest_progress_end();
memtest_progress_start("Random fill",pass);
memtest_fill_random(m,bytes);
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
memtest_progress_start("Solid fill",pass);
memtest_fill_value(m,bytes,0,(unsigned long)-1,'S');
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
memtest_progress_start("Checkerboard fill",pass);
memtest_fill_value(m,bytes,ULONG_ONEZERO,ULONG_ZEROONE,'C');
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
}
free(m);
}
/* Test the specified memory. The number of bytes must be multiple of 4096.
* If interactive is true the program exists with an error and prints
* ASCII arts to show progresses. Instead when interactive is 0, it can
* be used as an API call, and returns 1 if memory errors were found or
* 0 if there were no errors detected. */
int memtest_test(unsigned long *m, size_t bytes, int passes, int interactive) {
int pass = 0;
int errors = 0;
while (pass != passes) {
pass++;
if (interactive) memtest_progress_start("Addressing test",pass);
errors += memtest_addressing(m,bytes,interactive);
if (interactive) memtest_progress_end();
if (interactive) memtest_progress_start("Random fill",pass);
memtest_fill_random(m,bytes,interactive);
if (interactive) memtest_progress_end();
errors += memtest_compare_times(m,bytes,pass,4,interactive);
if (interactive) memtest_progress_start("Solid fill",pass);
memtest_fill_value(m,bytes,0,(unsigned long)-1,'S',interactive);
if (interactive) memtest_progress_end();
errors += memtest_compare_times(m,bytes,pass,4,interactive);
if (interactive) memtest_progress_start("Checkerboard fill",pass);
memtest_fill_value(m,bytes,ULONG_ONEZERO,ULONG_ZEROONE,'C',interactive);
if (interactive) memtest_progress_end();
errors += memtest_compare_times(m,bytes,pass,4,interactive);
}
return errors;
}
void memtest_test(void *buffer, size_t megabytes, int passes) {
size_t bytes = megabytes*1024*1024;
unsigned long *m = buffer;
int pass = 0;
while (pass != passes) {
pass++;
memtest_progress_start("Addressing test",pass);
memtest_addressing(m,bytes);
memtest_progress_end();
memtest_progress_start("Random fill",pass);
memtest_fill_random(m,bytes);
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
memtest_progress_start("Solid fill",pass);
memtest_fill_value(m,bytes,0,(unsigned long)-1,'S');
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
memtest_progress_start("Checkerboard fill",pass);
memtest_fill_value(m,bytes,ULONG_ONEZERO,ULONG_ZEROONE,'C');
memtest_progress_end();
memtest_compare_times(m,bytes,pass,4);
}
}
int memtest_preserving_test(unsigned long *m, size_t bytes, int passes) {
unsigned long backup[MEMTEST_BACKUP_WORDS];
unsigned long *p = m;
unsigned long *end = (unsigned long*) (((unsigned char*)m)+(bytes-MEMTEST_DECACHE_SIZE));
size_t left = bytes;
int errors = 0;
if (bytes & 4095) return 0; /* Can't test across 4k page boundaries. */
if (bytes < 4096*2) return 0; /* Can't test a single page. */
while(left) {
/* If we have to test a single final page, go back a single page
* so that we can test two pages, since the code can't test a single
* page but at least two. */
if (left == 4096) {
left += 4096;
p -= 4096/sizeof(unsigned long);
}
int pass = 0;
size_t len = (left > sizeof(backup)) ? sizeof(backup) : left;
/* Always test an even number of pages. */
if (len/4096 % 2) len -= 4096;
memcpy(backup,p,len); /* Backup. */
while(pass != passes) {
pass++;
errors += memtest_addressing(p,len,0);
memtest_fill_random(p,len,0);
if (bytes >= MEMTEST_DECACHE_SIZE) {
memtest_compare_times(m,MEMTEST_DECACHE_SIZE,pass,1,0);
memtest_compare_times(end,MEMTEST_DECACHE_SIZE,pass,1,0);
}
errors += memtest_compare_times(p,len,pass,4,0);
memtest_fill_value(p,len,0,(unsigned long)-1,'S',0);
if (bytes >= MEMTEST_DECACHE_SIZE) {
memtest_compare_times(m,MEMTEST_DECACHE_SIZE,pass,1,0);
memtest_compare_times(end,MEMTEST_DECACHE_SIZE,pass,1,0);
}
errors += memtest_compare_times(p,len,pass,4,0);
memtest_fill_value(p,len,ULONG_ONEZERO,ULONG_ZEROONE,'C',0);
if (bytes >= MEMTEST_DECACHE_SIZE) {
memtest_compare_times(m,MEMTEST_DECACHE_SIZE,pass,1,0);
memtest_compare_times(end,MEMTEST_DECACHE_SIZE,pass,1,0);
}
errors += memtest_compare_times(p,len,pass,4,0);
}
memcpy(p,backup,len); /* Restore. */
left -= len;
p += len/sizeof(unsigned long);
}
return errors;
}