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

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

#include <stasis/util/ringbuffer.h>

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

#define LOG_NAME   "check_concurrentRingbuffer.log"

/**
   @test

*/

#define NUM_ENTRIES 10000

START_TEST(ringBufferSmokeTest) {
  stasis_ringbuffer_t * ring = stasis_ringbuffer_init(12, 0);
  assert((void*)RING_VOLATILE == stasis_ringbuffer_nb_get_rd_buf(ring, 0, 1));
  lsn_t off = stasis_ringbuffer_nb_reserve_space(ring, 4*900);
  assert(off != RING_FULL && off != RING_TORN && off != RING_VOLATILE);
  void * buf = stasis_ringbuffer_get_wr_buf(ring, off, 4*900);

  lsn_t off2 = stasis_ringbuffer_nb_reserve_space(ring, 4*400);
  assert(off2 == RING_FULL);

  stasis_ringbuffer_advance_write_tail(ring, 4*300);
  const void * buf3 = stasis_ringbuffer_nb_get_rd_buf(ring, 0,4*300);
  assert(buf3 == buf);

  stasis_ringbuffer_advance_read_tail(ring, 4*300);

  lsn_t off4 = stasis_ringbuffer_nb_reserve_space(ring, 4*400);
  assert(off4 != RING_FULL && off4 != RING_TORN && off4 != RING_VOLATILE);

  // XXX stasis_ringbuffer_deinit(ring);
} END_TEST

#define PROD_CONS_SIZE (100L * 1024L * 1024L)
static void * consumerWorker(void * arg) {
  stasis_ringbuffer_t * ring = arg;
  lsn_t cursor = 0;
  while(cursor < PROD_CONS_SIZE) {
    lsn_t rnd_size = myrandom(2048);
    if(rnd_size + cursor > PROD_CONS_SIZE) { rnd_size = PROD_CONS_SIZE - cursor; }
    byte const * rd_buf = stasis_ringbuffer_get_rd_buf(ring, RING_NEXT, rnd_size);
    for(lsn_t i = 0; i < rnd_size; i++) {
  //    printf("R[%lld] (addr=%lld) val = %d (%d)\n", cursor+i, (long long)(rd_buf)+i, rd_buf[i], (cursor+i)%250);
      assert(rd_buf[i] == ((cursor + i)%250));
    }
    cursor += rnd_size;
    stasis_ringbuffer_advance_read_tail(ring, cursor);
  }
  return 0;
}
static void * producerWorker(void * arg) {
  stasis_ringbuffer_t * ring = arg;
  lsn_t cursor = 0;
  while(cursor < PROD_CONS_SIZE) {
    int rnd_size = myrandom(2048);
    if(rnd_size + cursor > PROD_CONS_SIZE) { rnd_size = PROD_CONS_SIZE - cursor; }
    lsn_t wr_off = stasis_ringbuffer_reserve_space(ring, rnd_size, 0);
    assert(wr_off == cursor);
    byte * wr_buf = stasis_ringbuffer_get_wr_buf(ring, wr_off, rnd_size);
    for(lsn_t i = 0; i < rnd_size; i++) {
      wr_buf[i] = (cursor + i)%250;
//      printf("W[%d] (addr=%lld) val = %d\n", cursor+i, (long long)(wr_buf)+i, wr_buf[i]);
    }
    cursor += rnd_size;
    stasis_ringbuffer_advance_write_tail(ring, cursor);
  }
  return 0;
}

START_TEST(ringBufferProducerConsumerTest) {
  stasis_ringbuffer_t * ring = stasis_ringbuffer_init(12, 0);
  pthread_t reader, writer;
  pthread_create(&reader, 0, consumerWorker, ring);
  pthread_create(&writer, 0, producerWorker, ring);
  pthread_join(reader, 0);
  pthread_join(writer, 0);
  // XXX stasis_ringbuffer_deinit(ring);
} END_TEST

#define NUM_READERS 20
#define NUM_WRITERS NUM_READERS
#define BYTES_PER_THREAD (10L * 1000L * 1000L)

typedef struct {
  pthread_mutex_t wr_mut;
  stasis_ringbuffer_t * ring;
} arg;
static void * concurrentReader(void * argp) {
  arg * a = argp;
  stasis_ringbuffer_t * ring = a->ring;
  lsn_t cursor = 0;
  lsn_t rd_handle;
  while(cursor < BYTES_PER_THREAD) {
    lsn_t rnd_size = 1+myrandom(2047/NUM_READERS);
    if(rnd_size + cursor > BYTES_PER_THREAD) { rnd_size = BYTES_PER_THREAD - cursor; }
    stasis_ringbuffer_consume_bytes(ring, &rnd_size, &rd_handle);

    byte const * rd_buf = stasis_ringbuffer_get_rd_buf(ring, rd_handle, rnd_size);

    for(lsn_t i = 0; i < rnd_size; i++) {
  //    printf("R[%lld] (addr=%lld) val = %d (%d)\n", cursor+i, (long long)(rd_buf)+i, rd_buf[i], (cursor+i)%250);
      assert(rd_buf[i] == ((rd_handle + i)%250));
    }
    cursor += rnd_size;
    stasis_ringbuffer_read_done(ring, &rd_handle);
  }
  return 0;
}
static void * concurrentWriter(void * argp) {
  arg * a = argp;
  stasis_ringbuffer_t * ring = a->ring;
  lsn_t cursor = 0;
  lsn_t wr_handle;
  while(cursor < BYTES_PER_THREAD) {
    int rnd_size = 1+myrandom(2047/NUM_WRITERS);
    if(rnd_size + cursor > BYTES_PER_THREAD) { rnd_size = BYTES_PER_THREAD- cursor; }
    stasis_ringbuffer_reserve_space(ring, rnd_size, &wr_handle);
    byte * wr_buf = stasis_ringbuffer_get_wr_buf(ring, wr_handle, rnd_size);
    for(lsn_t i = 0; i < rnd_size; i++) {
      wr_buf[i] = (wr_handle + i)%250;
//      printf("W[%d] (addr=%lld) val = %d\n", cursor+i, (long long)(wr_buf)+i, wr_buf[i]);
    }
    cursor += rnd_size;
    stasis_ringbuffer_write_done(ring, &wr_handle);
    stasis_ringbuffer_reading_writer_done(ring, &wr_handle);
  }
  return 0;
}
START_TEST(ringBufferConcurrentProducerConsumerTest) {
  arg a = {
      PTHREAD_MUTEX_INITIALIZER,
      stasis_ringbuffer_init(12, 0),
  };
  pthread_t readers[NUM_READERS];
  pthread_t writers[NUM_WRITERS];
  for(int i = 0; i < NUM_READERS; i++) {
    pthread_create(&readers[i], 0, concurrentReader, &a);
  }
  for(int i = 0; i < NUM_WRITERS; i++) {
    pthread_create(&writers[i], 0, concurrentWriter, &a);
  }
  for(int i = 0; i < NUM_READERS; i++) {
    pthread_join(readers[i], 0);
  }
  for(int i = 0; i < NUM_WRITERS; i++) {
    pthread_join(writers[i], 0);
  }

} END_TEST

Suite * check_suite(void) {
  Suite *s = suite_create("ringBuffer");
  /* Begin a new test */
  TCase *tc = tcase_create("ringBuffer");

  /* Sub tests are added, one per line, here */

  tcase_add_test(tc, ringBufferSmokeTest);
  tcase_add_test(tc, ringBufferProducerConsumerTest);
  tcase_add_test(tc, ringBufferConcurrentProducerConsumerTest);

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

  tcase_add_checked_fixture(tc, setup, teardown);


  suite_add_tcase(s, tc);
  return s;
}

#include "../check_setup.h"