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Code Issues Releases Wiki Activity

Slab allocator is exercised much more

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This commit is contained in:
obarthel
2016-12-04 11:11:28 +01:00
parent 4fc1b13945
commit 5cb27db203
1 changed files with 67 additions and 3 deletions
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70
test_programs/slab-test.c
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@ -13,14 +13,78 @@ static int print_json(void * ignore,const char * buffer,size_t len)
int int
main(int argc,char ** argv) main(int argc,char ** argv)
{ {
int num_allocations = 1000;
int max_allocation_size = 8192;
int random_free_percentage = 33;
char ** allocation_table;
char * allocation;
int i; int i;
allocation_table = malloc(sizeof(*allocation_table) * num_allocations);
if(allocation_table == NULL)
exit(EXIT_FAILURE);
srand(1); srand(1);
for(i = 0 ; i < 1000 ; i++) printf("/* Allocating %d random length fragments of memory (maximum size = %ld bytes). */\n", num_allocations, max_allocation_size);
malloc(1 + (rand() % 8192));
for(i = 0 ; i < num_allocations ; i++)
{
allocation = malloc(1 + (rand() % max_allocation_size));
if(allocation == NULL)
exit(EXIT_FAILURE);
allocation_table[i] = allocation;
}
__get_slab_stats(NULL, print_json); __get_slab_stats(NULL, print_json);
return(0); printf("\n/* Changing all allocations to different random lengths. */\n");
for(i = 0 ; i < num_allocations ; i++)
{
allocation = realloc(allocation_table[i], 1 + (rand() % max_allocation_size));
if(allocation == NULL)
exit(EXIT_FAILURE);
allocation_table[i] = allocation;
}
__get_slab_stats(NULL, print_json);
printf("\n/* Freeing %d%% of all allocations. */\n", random_free_percentage);
for(i = 0 ; i < num_allocations ; i++)
{
if((rand() % 100) < 33)
{
free(allocation_table[i]);
allocation_table[i] = NULL;
}
}
__get_slab_stats(NULL, print_json);
printf("\n/* Marking unused slabs for reuse; reallocating memory/changing allocation lengths. */\n");
__decay_unused_slabs();
for(i = 0 ; i < num_allocations ; i++)
{
allocation = realloc(allocation_table[i], 1 + (rand() % max_allocation_size));
if(allocation == NULL)
exit(EXIT_FAILURE);
allocation_table[i] = allocation;
}
__get_slab_stats(NULL, print_json);
printf("\n/* Freeing all unused slabs. */\n");
__free_unused_slabs();
__get_slab_stats(NULL, print_json);
return(EXIT_SUCCESS);
} }