text: /*-
   * Public Domain 2014-2017 MongoDB, Inc.
   * Public Domain 2008-2014 WiredTiger, Inc.
   *
   * This is free and unencumbered software released into the public domain.
   *
   * Anyone is free to copy, modify, publish, use, compile, sell, or
   * distribute this software, either in source code form or as a compiled
   * binary, for any purpose, commercial or non-commercial, and by any
   * means.
   *
   * In jurisdictions that recognize copyright laws, the author or authors
   * of this software dedicate any and all copyright interest in the
   * software to the public domain. We make this dedication for the benefit
   * of the public at large and to the detriment of our heirs and
   * successors. We intend this dedication to be an overt act of
   * relinquishment in perpetuity of all present and future rights to this
   * software under copyright law.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #include "thread.h"
  
  static void  print_stats(u_int);
  static WT_THREAD_RET reader(void *);
  static WT_THREAD_RET writer(void *);
  
  typedef struct {
  	char *name;				/* object name */
  	u_int nops;				/* Thread op count */
  
  	WT_RAND_STATE rnd;			/* RNG */
  
  	int remove;				/* cursor.remove */
  	int update;				/* cursor.update */
  	int reads;				/* cursor.search */
  } INFO;
  
  static INFO *run_info;
  
  void
  rw_start(u_int readers, u_int writers)
  {
  	struct timeval start, stop;
  	wt_thread_t *tids;
  	double seconds;
  	u_int i, name_index, offset, total_nops;
  
  	tids = NULL;	/* Keep GCC 4.1 happy. */
  	total_nops = 0;
  
  	/* Create per-thread structures. */
  	run_info = dcalloc((size_t)(readers + writers), sizeof(*run_info));
  	tids = dcalloc((size_t)(readers + writers), sizeof(*tids));
  
  	/* Create the files and load the initial records. */
  	for (i = 0; i < writers; ++i) {
  		if (i == 0 || multiple_files) {
  			run_info[i].name = dmalloc(64);
  			testutil_check(__wt_snprintf(
  			    run_info[i].name, 64, FNAME, i));
  
  			/* Vary by orders of magnitude */
  			if (vary_nops)
  				run_info[i].nops = WT_MAX(1000, max_nops >> i);
  			load(run_info[i].name);
  		} else
  			run_info[i].name = run_info[0].name;
  
  		/* Setup op count if not varying ops. */
  		if (run_info[i].nops == 0)
  			run_info[i].nops = max_nops;
  		total_nops += run_info[i].nops;
  	}
  
  	/* Setup the reader configurations */
  	for (i = 0; i < readers; ++i) {
  		offset = i + writers;
  		if (multiple_files) {
  			run_info[offset].name = dmalloc(64);
  			/* Have readers read from tables with writes. */
  			name_index = i % writers;
  			testutil_check(__wt_snprintf(
  			    run_info[offset].name, 64, FNAME, name_index));
  
  			/* Vary by orders of magnitude */
  			if (vary_nops)
  				run_info[offset].nops =
  				    WT_MAX(1000, max_nops >> name_index);
  		} else
  			run_info[offset].name = run_info[0].name;
  
  		/* Setup op count if not varying ops. */
  		if (run_info[offset].nops == 0)
  			run_info[offset].nops = max_nops;
  		total_nops += run_info[offset].nops;
  	}
  
  	(void)gettimeofday(&start, NULL);
  
  	/* Create threads. */
  	for (i = 0; i < readers; ++i)
  		testutil_check(__wt_thread_create(
  		    NULL, &tids[i], reader, (void *)(uintptr_t)i));
  	for (; i < readers + writers; ++i)
  		testutil_check(__wt_thread_create(
  		    NULL, &tids[i], writer, (void *)(uintptr_t)i));
  
  	/* Wait for the threads. */
  	for (i = 0; i < readers + writers; ++i)
  		testutil_check(__wt_thread_join(NULL, tids[i]));
  
  	(void)gettimeofday(&stop, NULL);
  	seconds = (stop.tv_sec - start.tv_sec) +
  	    (stop.tv_usec - start.tv_usec) * 1e-6;
  	fprintf(stderr, "timer: %.2lf seconds (%d ops/second)\n",
  	    seconds, (int)(((readers + writers) * total_nops) / seconds));
  
  	/* Verify the files. */
  	for (i = 0; i < readers + writers; ++i) {
  		verify(run_info[i].name);
  		if (!multiple_files)
  			break;
  	}
  
  	/* Output run statistics. */
  	print_stats(readers + writers);
  
  	/* Free allocated memory. */
  	for (i = 0; i < readers + writers; ++i) {
  		free(run_info[i].name);
  		if (!multiple_files)
  			break;
  	}
  
  	free(run_info);
  	free(tids);
  }
  
  /*
   * reader_op --
   *	Read operation.
   */
  static inline void
  reader_op(WT_SESSION *session, WT_CURSOR *cursor, INFO *s)
  {
  	WT_ITEM *key, _key;
  	size_t len;
  	uint64_t keyno;
  	int ret;
  	char keybuf[64];
  
  	key = &_key;
  
  	keyno = __wt_random(&s->rnd) % nkeys + 1;
  	if (ftype == ROW) {
  		testutil_check(__wt_snprintf_len_set(
  		    keybuf, sizeof(keybuf), &len, "%017" PRIu64, keyno));
  		key->data = keybuf;
  		key->size = (uint32_t)len;
  		cursor->set_key(cursor, key);
  	} else
  		cursor->set_key(cursor, keyno);
  	if ((ret = cursor->search(cursor)) != 0 && ret != WT_NOTFOUND)
  		testutil_die(ret, "cursor.search");
  	if (log_print)
  		testutil_check(session->log_printf(session,
  		    "Reader Thread %p key %017" PRIu64, pthread_self(), keyno));
  }
  
  /*
   * reader --
   *	Reader thread start function.
   */
  static WT_THREAD_RET
  reader(void *arg)
  {
  	INFO *s;
  	WT_CURSOR *cursor;
  	WT_SESSION *session;
  	u_int i;
  	int id, ret;
  	char tid[128];
  
  	id = (int)(uintptr_t)arg;
  	s = &run_info[id];
  	testutil_check(__wt_thread_id(tid, sizeof(tid)));
  	__wt_random_init(&s->rnd);
  
  	printf(" read thread %2d starting: tid: %s, file: %s\n",
  	    id, tid, s->name);
  
  	__wt_yield();		/* Get all the threads created. */
  
  	if (session_per_op) {
  		for (i = 0; i < s->nops; ++i, ++s->reads, __wt_yield()) {
  			if ((ret = conn->open_session(
  			    conn, NULL, NULL, &session)) != 0)
  				testutil_die(ret, "conn.open_session");
  			if ((ret = session->open_cursor(
  			    session, s->name, NULL, NULL, &cursor)) != 0)
  				testutil_die(ret, "session.open_cursor");
  			reader_op(session, cursor, s);
  			if ((ret = session->close(session, NULL)) != 0)
  				testutil_die(ret, "session.close");
  		}
  	} else {
  		if ((ret = conn->open_session(
  		    conn, NULL, NULL, &session)) != 0)
  			testutil_die(ret, "conn.open_session");
  		if ((ret = session->open_cursor(
  		    session, s->name, NULL, NULL, &cursor)) != 0)
  			testutil_die(ret, "session.open_cursor");
  		for (i = 0; i < s->nops; ++i, ++s->reads, __wt_yield())
  			reader_op(session, cursor, s);
  		if ((ret = session->close(session, NULL)) != 0)
  			testutil_die(ret, "session.close");
  	}
  
  	printf(" read thread %2d stopping: tid: %s, file: %s\n",
  	    id, tid, s->name);
  
  	return (WT_THREAD_RET_VALUE);
  }
  
  /*
   * writer_op --
   *	Write operation.
   */
  static inline void
  writer_op(WT_SESSION *session, WT_CURSOR *cursor, INFO *s)
  {
  	WT_ITEM *key, _key, *value, _value;
  	uint64_t keyno;
  	size_t len;
  	int ret;
  	char keybuf[64], valuebuf[64];
  
  	key = &_key;
  	value = &_value;
  
  	keyno = __wt_random(&s->rnd) % nkeys + 1;
  	if (ftype == ROW) {
  		testutil_check(__wt_snprintf_len_set(
  		    keybuf, sizeof(keybuf), &len, "%017" PRIu64, keyno));
  		key->data = keybuf;
  		key->size = (uint32_t)len;
  		cursor->set_key(cursor, key);
  	} else
  		cursor->set_key(cursor, keyno);
  	if (keyno % 5 == 0) {
  		++s->remove;
  		if ((ret =
  		    cursor->remove(cursor)) != 0 && ret != WT_NOTFOUND)
  			testutil_die(ret, "cursor.remove");
  	} else {
  		++s->update;
  		value->data = valuebuf;
  		if (ftype == FIX)
  			cursor->set_value(cursor, 0x10);
  		else {
  			testutil_check(__wt_snprintf_len_set(
  			    valuebuf, sizeof(valuebuf),
  			    &len, "XXX %37" PRIu64, keyno));
  			value->size = (uint32_t)len;
  			cursor->set_value(cursor, value);
  		}
  		if ((ret = cursor->update(cursor)) != 0)
  			testutil_die(ret, "cursor.update");
  	}
  	if (log_print)
  		testutil_check(session->log_printf(session,
  		    "Writer Thread %p key %017" PRIu64, pthread_self(), keyno));
  }
  
  /*
   * writer --
   *	Writer thread start function.
   */
  static WT_THREAD_RET
  writer(void *arg)
  {
  	INFO *s;
  	WT_CURSOR *cursor;
  	WT_SESSION *session;
  	u_int i;
  	int id, ret;
  	char tid[128];
  
  	id = (int)(uintptr_t)arg;
  	s = &run_info[id];
  	testutil_check(__wt_thread_id(tid, sizeof(tid)));
  	__wt_random_init(&s->rnd);
  
  	printf("write thread %2d starting: tid: %s, file: %s\n",
  	    id, tid, s->name);
  
  	__wt_yield();		/* Get all the threads created. */
  
  	if (session_per_op) {
  		for (i = 0; i < s->nops; ++i, __wt_yield()) {
  			if ((ret = conn->open_session(
  			    conn, NULL, NULL, &session)) != 0)
  				testutil_die(ret, "conn.open_session");
  			if ((ret = session->open_cursor(
  			    session, s->name, NULL, NULL, &cursor)) != 0)
  				testutil_die(ret, "session.open_cursor");
  			writer_op(session, cursor, s);
  			if ((ret = session->close(session, NULL)) != 0)
  				testutil_die(ret, "session.close");
  		}
  	} else {
  		if ((ret = conn->open_session(
  		    conn, NULL, NULL, &session)) != 0)
  			testutil_die(ret, "conn.open_session");
  		if ((ret = session->open_cursor(
  		    session, s->name, NULL, NULL, &cursor)) != 0)
  			testutil_die(ret, "session.open_cursor");
  		for (i = 0; i < s->nops; ++i, __wt_yield())
  			writer_op(session, cursor, s);
  		if ((ret = session->close(session, NULL)) != 0)
  			testutil_die(ret, "session.close");
  	}
  
  	printf("write thread %2d stopping: tid: %s, file: %s\n",
  	    id, tid, s->name);
  
  	return (WT_THREAD_RET_VALUE);
  }
  
  /*
   * print_stats --
   *	Display reader/writer thread stats.
   */
  static void
  print_stats(u_int nthreads)
  {
  	INFO *s;
  	u_int id;
  
  	s = run_info;
  	for (id = 0; id < nthreads; ++id, ++s)
  		printf("%3u: read %6d, remove %6d, update %6d\n",
  		    id, s->reads, s->remove, s->update);
  }
  