stasis-aries-wal/test/stasis/check_allocationPolicy.c

/*---
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---*/

#include "../check_includes.h"

#include <stasis/allocationPolicy.h>
#include <stasis/common.h>

#include <sys/time.h>
#include <time.h>
#include <assert.h>

#define LOG_NAME   "check_lhtable.log"

long myrandom(long x) {
  double xx = x;
  double r = random();
  double max = ((int64_t)RAND_MAX)+1;
  max /= xx;
  return (long)((r/max));
}

/**
   @test
*/

START_TEST(allocationPolicy_smokeTest)
{

  availablePage ** pages = malloc(5 * sizeof(availablePage*));

  for(int i = 0; i < 4; i++) {
    pages[i] = malloc(sizeof(availablePage));
  }

  availablePage p;

  p.pageid = 0;
  p.freespace = 100;
  p.lockCount = 0;
  (*pages[0]) = p;

  p.pageid = 1;
  p.freespace = 100;
  (*pages[1]) = p;

  p.pageid = 2;
  p.freespace = 50;
  (*pages[2]) = p;

  p.pageid = 3;
  p.freespace = 25;
  (*pages[3]) = p;

  pages[4] = 0;

  stasis_allocation_policy_t * ap = stasis_allocation_policy_init();
  stasis_allocation_policy_register_new_pages(ap, pages);

  availablePage * p1 = stasis_allocation_policy_pick_suitable_page(ap, 1, 51);
  stasis_allocation_policy_alloced_from_page(ap, 1, p1->pageid);

  assert(p1);
  assert(p1->pageid == 0 || p1->pageid == 1);
  stasis_allocation_policy_update_freespace_locked_page(ap, 1, p1, 0);

  availablePage * p2 = stasis_allocation_policy_pick_suitable_page(ap, 1, 21);
  stasis_allocation_policy_alloced_from_page(ap, 1, p2->pageid);

  assert(p2->pageid == 3);
  stasis_allocation_policy_update_freespace_locked_page(ap, 1, p2, 0);

  availablePage * p3 = stasis_allocation_policy_pick_suitable_page(ap, 2, 51);
  stasis_allocation_policy_alloced_from_page(ap, 2, p3->pageid);
  assert(p1->pageid != p3->pageid);
  stasis_allocation_policy_update_freespace_locked_page(ap, 2, p3, 0);

  availablePage * p4 = stasis_allocation_policy_pick_suitable_page(ap, 2, 51);
  assert(!p4);

  availablePage * p5 = stasis_allocation_policy_pick_suitable_page(ap, 2, 50);
  stasis_allocation_policy_alloced_from_page(ap, 2, p5->pageid);
  assert(p5 && p5->pageid == 2);
  stasis_allocation_policy_update_freespace_locked_page(ap, 2, p5, 0);

  stasis_allocation_policy_update_freespace_locked_page(ap, 1, p1, 100);
  stasis_allocation_policy_transaction_completed(ap, 1);
  stasis_allocation_policy_update_freespace_unlocked_page(ap, p2, 25);

  availablePage * p6 = stasis_allocation_policy_pick_suitable_page(ap, 2, 50);
  stasis_allocation_policy_alloced_from_page(ap, 2, p6->pageid);
  assert(p6->pageid == 1 || p6->pageid == 0);
  stasis_allocation_policy_update_freespace_locked_page(ap, 2, p6, 0);

  availablePage * p7 = stasis_allocation_policy_pick_suitable_page(ap, 2, 50);
  assert(!p7);

  stasis_allocation_policy_update_freespace_unlocked_page(ap, pages[3], 51);

  availablePage * p8 =stasis_allocation_policy_pick_suitable_page(ap, 2, 51);
  assert(p8->pageid == 3);
  stasis_allocation_policy_alloced_from_page(ap, 2, p8->pageid);

  stasis_allocation_policy_update_freespace_locked_page(ap, 2, p8, 0);

  stasis_allocation_policy_transaction_completed(ap, 2);

  stasis_allocation_policy_deinit(ap);

  free(pages);


} END_TEST

#define AVAILABLE_PAGE_COUNT_A 1000
#define AVAILABLE_PAGE_COUNT_B 10
#define FREE_MUL 100
#define XACT_COUNT 1000
static const int MAX_DESIRED_FREESPACE =
  (AVAILABLE_PAGE_COUNT_A + AVAILABLE_PAGE_COUNT_B) * FREE_MUL;

#define PHASE_ONE_COUNT 100000
#define PHASE_TWO_COUNT 500000
static int nextxid = 0;
int activexidcount = 0;
static void takeRandomAction(stasis_allocation_policy_t * ap, int * xids,
			     availablePage ** pages1, availablePage ** pages2) {
  switch(myrandom(6)) {
  case 0 : {   // find page
    int thexid = myrandom(XACT_COUNT);
    if(xids[thexid] == -1) {
      xids[thexid] = nextxid;
      nextxid++;
      activexidcount++;
      DEBUG("xid begins\n");
    }
    int thefreespace = myrandom(MAX_DESIRED_FREESPACE);
    availablePage * p =
      stasis_allocation_policy_pick_suitable_page(ap, xids[thexid], thefreespace);
    if(p) {
      DEBUG("alloc succeeds\n");
      // xxx validate returned value...
    } else {
      DEBUG("alloc fails\n");
    }
  } break;
  case 1 : {   // xact completed
    if(!activexidcount) { break; }
    int thexid;
    while(xids[thexid = myrandom(XACT_COUNT)] == -1) { }
    stasis_allocation_policy_transaction_completed(ap, xids[thexid]);
    xids[thexid] = -1;
    activexidcount--;
    DEBUG("complete");
  } break;
  case 2 : {   // update freespace unlocked
    int thespacediff = myrandom(MAX_DESIRED_FREESPACE/2) - (MAX_DESIRED_FREESPACE/2);
    int thexid;
    if(!activexidcount) { break; }
    while(xids[thexid = myrandom(XACT_COUNT)] == -1) { }
    int minfreespace;
    if(thespacediff < 0) {
      minfreespace = 0-thespacediff;
    } else {
      minfreespace = 0;
    }
    availablePage * p = stasis_allocation_policy_pick_suitable_page(ap, xids[thexid],
                                                 minfreespace);
    if(p && p->lockCount == 0) {
      int thenewfreespace = p->freespace+thespacediff;
      stasis_allocation_policy_update_freespace_unlocked_page(ap, p, thenewfreespace);
      //      printf("updated freespace unlocked");
    }
  } break;
  case 3 : {   // update freespace locked
  } break;
  case 4 : {   // lock page
  } break;
  case 5 : {   // alloced from page

    // xxx this case is nonsense.  we pick a random page, alloc from it, and allocation policy correctly sees that we're violating protocol, and cores...
    // xxx write better one..
    /*        int thexid;
    if(!activexidcount) { break; }
    while(xids[thexid = myrandom(XACT_COUNT)] == -1) { }
    pageid_t thepage=myrandom(AVAILABLE_PAGE_COUNT_A + pages2?AVAILABLE_PAGE_COUNT_B:0);
    stasis_allocation_policy_alloced_from_page(ap,thexid,thepage); */

  } break;

  }


}

START_TEST(allocationPolicy_randomTest) {

  struct timeval time;
  gettimeofday(&time,0);
  long seed =  time.tv_usec + time.tv_sec * 1000000;
  printf("\nSeed = %ld\n", seed);
  srandom(seed);

  availablePage ** pages1 =
    malloc((1+AVAILABLE_PAGE_COUNT_A) * sizeof(availablePage *));
  availablePage ** pages2 =
    malloc((1+AVAILABLE_PAGE_COUNT_B) * sizeof(availablePage *));

  int * xids = malloc(sizeof(int) * XACT_COUNT);

  for(int i = 0; i < XACT_COUNT; i++) {
    xids[i] = -1;
  }

  for(int i = 0; i < AVAILABLE_PAGE_COUNT_A; i++) {
    pages1[i] = malloc(sizeof(availablePage));
    pages1[i]->pageid = i;
    pages1[i]->freespace = i * FREE_MUL;
    pages1[i]->lockCount = 0;
  }
  pages1[AVAILABLE_PAGE_COUNT_A] = 0;
  for(int i = 0 ; i < AVAILABLE_PAGE_COUNT_B; i++) {
    pages2[i] = malloc(sizeof(availablePage));
    pages2[i]->pageid = AVAILABLE_PAGE_COUNT_A + i;
    pages2[i]->freespace = (AVAILABLE_PAGE_COUNT_A + i) * FREE_MUL;
    pages2[i]->lockCount = 0;
  }
  pages2[AVAILABLE_PAGE_COUNT_B] = 0;

  stasis_allocation_policy_t * ap = stasis_allocation_policy_init();

  stasis_allocation_policy_register_new_pages(ap, pages1);

  for(int k = 0; k < PHASE_ONE_COUNT; k++) {
    // Don't pass in pages2; ap doesn't know about them yet!
    takeRandomAction(ap, xids, pages1, 0);
  }

  stasis_allocation_policy_register_new_pages(ap, pages2);

  for(int k = 0; k < PHASE_TWO_COUNT; k++) {
    takeRandomAction(ap, xids, pages1, pages2);
  }

  stasis_allocation_policy_deinit(ap);

  free(pages1);
  free(pages2);

} END_TEST

Suite * check_suite(void) {
  Suite *s = suite_create("allocationPolicy");
  /* Begin a new test */
  TCase *tc = tcase_create("allocationPolicy");
  tcase_set_timeout(tc, 0); // disable timeouts

  /* Sub tests are added, one per line, here */
  // XXX this test might be flawed.
  tcase_add_test(tc, allocationPolicy_smokeTest);
  tcase_add_test(tc, allocationPolicy_randomTest);

  /* --------------------------------------------- */

  tcase_add_checked_fixture(tc, setup, teardown);


  suite_add_tcase(s, tc);
  return s;
}

#include "../check_setup.h"