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

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---*/
#include "../check_includes.h"

#include <stasis/latches.h>
#include <stasis/transactional.h>

#include <assert.h>

#define LOG_NAME   "check_regions.log"


/**
   @test
*/
START_TEST(regions_smokeTest) {
  Tinit();
  int xid = Tbegin();

  pageid_t max_page = 0;
  pageid_t page = TregionAlloc(xid, 100, 0);
  assert(TregionSize(xid, page) == 100);
  pageid_t new_page = page;
  if(new_page + 1 + 100 > max_page) {
    max_page = new_page + 1 + 100;
  }

  new_page = TregionAlloc(xid, 1, 0);
  if(new_page + 2 > max_page) {
    max_page = new_page + 2;
  }
  assert(TregionSize(xid, new_page) == 1);
  TregionDealloc(xid, page);

  pageid_t pages[50];

  for(int i = 0; i < 50; i++) {
    new_page = TregionAlloc(xid, 1, 0);
    assert(TregionSize(xid, new_page) == 1);
    pages[i] = new_page;
    if(new_page + 2 > max_page) {
      max_page = new_page + 2;
    }
  }

  for(int i = 0; i < 50; i+=2) {
    assert(TregionSize(xid, pages[i]) == 1);
    TregionDealloc(xid, pages[i]);
  }

  Tcommit(xid);

  xid = Tbegin();
  for(int i = 0; i < 50; i+=2) {
    new_page = TregionAlloc(xid, 1, 0);
    if(new_page + 2 > max_page) {
      max_page = new_page + 2;
    }
  }
  Tabort(xid);
  xid = Tbegin();
  for(int i = 0; i < 50; i+=2) {
    new_page = TregionAlloc(xid, 1, 0);
    if(new_page + 2 > max_page) {
      max_page = new_page + 2;
    }
  }

  fsckRegions(xid);

  Tcommit(xid);

  printf("\nMaximum space usage = %lld, best possible = %d\n", max_page, 104); // peak storage usage = 100 pages + 1 page + 3 boundary pages.

  Tdeinit();
}
END_TEST

START_TEST(regions_randomizedTest) {
  Tinit();
  time_t seed = time(0);
  printf("Seed = %ld: ", seed);
  srandom(seed);
  int xid = Tbegin();
  pageid_t pagesAlloced = 0;
  pageid_t regionsAlloced = 0;
  double max_blowup = 0;
  pageid_t max_region_count = 0;
  pageid_t max_waste = 0;
  pageid_t max_size = 0;
  pageid_t max_ideal_size = 0;
  for(int i = 0; i < 10000; i++) {
    if(!(i % 100)) {
      Tcommit(xid);
      xid = Tbegin();
    }
    if(!(i % 100)) {
      fsckRegions(xid);
    }

    if(myrandom(2)) {
      unsigned int size = myrandom(100);
      TregionAlloc(xid, size, 0);
      pagesAlloced += size;
      regionsAlloced ++;
    } else {
      if(regionsAlloced) {
	pageid_t victim = myrandom(regionsAlloced);
	pageid_t victimSize;
	pageid_t victimPage;
	TregionFindNthActive(xid, victim, &victimPage, &victimSize);
	TregionDealloc(xid, victimPage);
	pagesAlloced -= victimSize;
	regionsAlloced --;
      } else {
	i--;
      }
    }

    if(regionsAlloced) {
      pageid_t lastRegionStart;
      pageid_t lastRegionSize;

      TregionFindNthActive(xid, regionsAlloced-1, &lastRegionStart, &lastRegionSize);
      pageid_t length = lastRegionStart + lastRegionSize+1;
      pageid_t ideal  = pagesAlloced + regionsAlloced + 1;
      double blowup = (double)length/(double)ideal;
      unsigned long long bytes_wasted = length - ideal;
      // printf("Region count = %d, blowup = %d / %d = %5.2f\n", regionsAlloced, length, ideal, blowup);
      if(max_blowup < blowup) {
	max_blowup = blowup;
      }
      if(max_waste < bytes_wasted) {
	max_waste = bytes_wasted;
      }
      if(max_size < length) {
	max_size = length;
      }
      if(max_ideal_size < ideal) {
	max_ideal_size = ideal;
      }
      if(max_region_count < regionsAlloced) {
	max_region_count = regionsAlloced;
      }
    }
  }
  fsckRegions(xid);
  Tcommit(xid);

  Tdeinit();
  if((double)max_size/(double)max_ideal_size > 5) {
    // max_blowup isn't what we want here; it measures the peak
    // percentage of the file that is unused.  Instead, we want to
    // measure the actual and ideal page file sizes for this run.
    printf("WARNING: Excessive blowup ");
  }
  printf("Max # of regions = %lld, page file size = %5.2fM, ideal page file size = %5.2fM, (blowup = %5.2f)\n",
	 //peak bytes wasted = %5.2fM, blowup = %3.2f\n",
	 max_region_count,
	 ((double)max_size * PAGE_SIZE)/(1024.0*1024.0),
	 ((double)max_ideal_size * PAGE_SIZE)/(1024.0*1024.0),
	 (double)max_size/(double)max_ideal_size);
  //	 ((double)max_waste * PAGE_SIZE)/(1024.0*1024.0),
  //	 max_blowup);

} END_TEST

START_TEST(regions_lockSmokeTest) {
  Tinit();
  int xid = Tbegin();
  pageid_t pageid = TregionAlloc(xid, 100,0);
  fsckRegions(xid);
  Tcommit(xid);


  xid = Tbegin();
  int xid2 = Tbegin();

  TregionDealloc(xid, pageid);

  for(int i = 0; i < 50; i++) {
    TregionAlloc(xid2, 1, 0);
  }

  fsckRegions(xid);
  Tabort(xid);
  fsckRegions(xid2);
  Tcommit(xid2);
  Tdeinit();
} END_TEST

START_TEST(regions_lockRandomizedTest) {
  Tinit();

  const int NUM_XACTS = 100;
  const int NUM_OPS   = 10000;
  const int FUDGE = 10;
  int xids[NUM_XACTS];

  pageid_t * xidRegions[NUM_XACTS + FUDGE];
  int xidRegionCounts[NUM_XACTS + FUDGE];

  int longXid = Tbegin();

  time_t seed = time(0);
  printf("\nSeed = %ld\n", seed);
  srandom(seed);

  for(int i = 0; i < NUM_XACTS; i++) {
    xids[i] = Tbegin();
    assert(xids[i] < NUM_XACTS + FUDGE);
    xidRegions[xids[i]] = malloc(sizeof(pageid_t) * NUM_OPS);
    xidRegionCounts[xids[i]] = 0;
  }
  int activeXacts = NUM_XACTS;

  for(int i = 0; i < NUM_OPS; i++) {
    pageid_t j;
    if(!(i % (NUM_OPS/NUM_XACTS))) {
      // abort or commit one transaction randomly.
      activeXacts --;
      j = myrandom(activeXacts);

      if(myrandom(2)) {
	Tcommit(xids[j]);
      } else {
	Tabort(xids[j]);
      }

      if(activeXacts == 0) {
	break;
      }
      for(; j < activeXacts; j++) {
	xids[j] = xids[j+1];
      }
      fsckRegions(longXid);
    }

    j = myrandom(activeXacts);

    if(myrandom(2)) {
      // alloc
      xidRegions[xids[j]][xidRegionCounts[xids[j]]] = TregionAlloc(xids[j], myrandom(100), 0);
	xidRegionCounts[xids[j]]++;
    } else {
      // free
      if(xidRegionCounts[xids[j]]) {
	pageid_t k = myrandom(xidRegionCounts[xids[j]]);

	TregionDealloc(xids[j], xidRegions[xids[j]][k]);

	xidRegionCounts[xids[j]]--;

	for(; k < xidRegionCounts[xids[j]]; k++) {
	  xidRegions[xids[j]][k] = xidRegions[xids[j]][k+1];
	}
      }
    }
  }

  for(int i = 0; i < activeXacts; i++) {
    Tabort(i);
    fsckRegions(longXid);
  }

  Tcommit(longXid);

  Tdeinit();
} END_TEST

START_TEST(regions_recoveryTest) {

  Tinit();

  pageid_t pages[50];
  int xid1 = Tbegin();
  int xid2 = Tbegin();
  for(int i = 0; i < 50; i+=2) {
    pages[i] = TregionAlloc(xid1, myrandom(4)+1, 0);
    pages[i+1] = TregionAlloc(xid2, myrandom(2)+1, 0);
  }

  fsckRegions(xid1);

  Tcommit(xid1);

  Tdeinit();

  if(TdurabilityLevel() == VOLATILE) { return; }

  Tinit();

  int xid = Tbegin();
  fsckRegions(xid);

  for(int i = 0; i < 50; i+=2) {
    TregionDealloc(xid, pages[i]);
  }

  fsckRegions(xid);
  Tabort(xid);
  fsckRegions(Tbegin());
  Tdeinit();

  Tinit();
  fsckRegions(Tbegin());
  Tdeinit();

} END_TEST

/**
  Add suite declarations here
*/
Suite * check_suite(void) {
  Suite *s = suite_create("regions");
  /* Begin a new test */
  TCase *tc = tcase_create("regions_test");
  tcase_set_timeout(tc, 0); // disable timeouts

  stasis_log_softcommit = 1; // disable forcing log at commit

  /* Sub tests are added, one per line, here */
  tcase_add_test(tc, regions_smokeTest);
  tcase_add_test(tc, regions_randomizedTest);
  tcase_add_test(tc, regions_lockSmokeTest);
  tcase_add_test(tc, regions_lockRandomizedTest);
  tcase_add_test(tc, regions_recoveryTest);
  /* --------------------------------------------- */
  tcase_add_checked_fixture(tc, setup, teardown);
  suite_add_tcase(s, tc);


  return s;
}

#include "../check_setup.h"