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/*-
* Public Domain 2014-present 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 "format.h"
/*
* lrt --
* Start a long-running transaction.
*/
WT_THREAD_RET
lrt(void *arg)
{
WT_CONNECTION *conn;
WT_CURSOR *cursor;
WT_ITEM key, value;
WT_SESSION *session;
size_t buf_len, buf_size;
uint64_t keyno, saved_keyno;
uint8_t bitfield;
u_int period;
int pinned, ret;
void *buf;
(void)(arg); /* Unused parameter */
saved_keyno = 0; /* [-Werror=maybe-uninitialized] */
key_gen_init(&key);
val_gen_init(&value);
buf = NULL;
buf_len = buf_size = 0;
/* Open a session and cursor. */
conn = g.wts_conn;
testutil_check(conn->open_session(conn, NULL, NULL, &session));
/*
* open_cursor can return EBUSY if concurrent with a metadata operation, retry in that case.
*/
while ((ret = session->open_cursor(session, g.uri, NULL, NULL, &cursor)) == EBUSY)
__wt_yield();
testutil_check(ret);
for (pinned = 0;;) {
if (pinned) {
/* Re-read the record at the end of the table. */
while ((ret = read_row_worker(cursor, saved_keyno, &key, &value, false)) == WT_ROLLBACK)
;
if (ret != 0)
testutil_die(ret, "read_row_worker %" PRIu64, saved_keyno);
/* Compare the previous value with the current one. */
if (g.type == FIX) {
ret = cursor->get_value(cursor, &bitfield);
value.data = &bitfield;
value.size = 1;
} else
ret = cursor->get_value(cursor, &value);
if (ret != 0)
testutil_die(ret, "cursor.get_value: %" PRIu64, saved_keyno);
if (buf_size != value.size || memcmp(buf, value.data, value.size) != 0)
testutil_die(0, "mismatched start/stop values");
/* End the transaction. */
testutil_check(session->commit_transaction(session, NULL));
/* Reset the cursor, releasing our pin. */
testutil_check(cursor->reset(cursor));
pinned = 0;
} else {
/*
* Test named snapshots: create a snapshot, wait to give the transaction state time to
* move forward, then start a transaction with the named snapshot, drop it, then commit
* the transaction. This exercises most of the named snapshot logic under load.
*/
testutil_check(session->snapshot(session, "name=test"));
__wt_sleep(1, 0);
wiredtiger_begin_transaction(session, "snapshot=test");
testutil_check(session->snapshot(session, "drop=(all)"));
testutil_check(session->commit_transaction(session, NULL));
/*
* Begin transaction: without an explicit transaction, the snapshot is only kept around
* while a cursor is positioned. As soon as the cursor loses its position a new snapshot
* will be allocated.
*/
while (
(ret = session->begin_transaction(session, "snapshot=snapshot")) == WT_CACHE_FULL)
;
testutil_check(ret);
/* Read a record at the end of the table. */
do {
saved_keyno = mmrand(NULL, (u_int)(g.key_cnt - g.key_cnt / 10), (u_int)g.key_cnt);
while (
(ret = read_row_worker(cursor, saved_keyno, &key, &value, false)) == WT_ROLLBACK)
;
} while (ret == WT_NOTFOUND);
if (ret != 0)
testutil_die(ret, "read_row_worker %" PRIu64, saved_keyno);
/* Copy the cursor's value. */
if (g.type == FIX) {
ret = cursor->get_value(cursor, &bitfield);
value.data = &bitfield;
value.size = 1;
} else
ret = cursor->get_value(cursor, &value);
if (ret != 0)
testutil_die(ret, "cursor.get_value: %" PRIu64, saved_keyno);
if (buf_len < value.size)
buf = drealloc(buf, buf_len = value.size);
memcpy(buf, value.data, buf_size = value.size);
/*
* Move the cursor to an early record in the table, hopefully allowing the page with the
* record just retrieved to be evicted from memory.
*/
do {
keyno = mmrand(NULL, 1, (u_int)g.key_cnt / 5);
while ((ret = read_row_worker(cursor, keyno, &key, &value, false)) == WT_ROLLBACK)
;
} while (ret == WT_NOTFOUND);
if (ret != 0)
testutil_die(ret, "read_row_worker %" PRIu64, keyno);
pinned = 1;
}
/* Sleep for some number of seconds. */
period = mmrand(NULL, 1, 10);
/* Sleep for short periods so we don't make the run wait. */
while (period > 0 && !g.workers_finished) {
--period;
__wt_sleep(1, 0);
}
if (g.workers_finished)
break;
}
testutil_check(session->close(session, NULL));
key_gen_teardown(&key);
val_gen_teardown(&value);
free(buf);
return (WT_THREAD_RET_VALUE);
}
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