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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 "test_util.h"
/*
* JIRA ticket reference: WT-2535 Test case description: This is a test case that looks for lost
* updates to a single record. That is multiple threads each do the same number of read modify write
* operations on a single record. At the end verify that the data contains the expected value.
* Failure mode: Check that the data is correct at the end of the run.
*/
void *thread_insert_race(void *);
static uint64_t ready_counter;
/*
* set_key --
* Wrapper providing the correct typing for the WT_CURSOR::set_key variadic argument.
*/
static void
set_key(WT_CURSOR *c, uint64_t value)
{
c->set_key(c, value);
}
/*
* set_value --
* Wrapper providing the correct typing for the WT_CURSOR::set_value variadic argument.
*/
static void
set_value(TEST_OPTS *opts, WT_CURSOR *c, uint64_t value)
{
if (opts->table_type == TABLE_FIX)
c->set_value(c, (uint8_t)value);
else
c->set_value(c, value);
}
/*
* get_value --
* Wrapper providing the correct typing for the WT_CURSOR::get_value variadic argument.
*/
static uint64_t
get_value(TEST_OPTS *opts, WT_CURSOR *c)
{
uint64_t value64;
uint8_t value8;
if (opts->table_type == TABLE_FIX) {
testutil_check(c->get_value(c, &value8));
return (value8);
} else {
testutil_check(c->get_value(c, &value64));
return (value64);
}
}
/*
* main --
* TODO: Add a comment describing this function.
*/
int
main(int argc, char *argv[])
{
TEST_OPTS *opts, _opts;
WT_CURSOR *c;
WT_SESSION *session;
clock_t ce, cs;
pthread_t id[100];
uint64_t current_value, expected_value;
int i;
char tableconf[128];
opts = &_opts;
memset(opts, 0, sizeof(*opts));
opts->nthreads = 20;
opts->nrecords = 100000;
opts->table_type = TABLE_ROW;
testutil_check(testutil_parse_opts(argc, argv, opts));
testutil_make_work_dir(opts->home);
testutil_check(wiredtiger_open(opts->home, NULL,
"create,cache_size=2G,eviction=(threads_max=5),statistics=(all),statistics_log=(json,on_"
"close,wait=1)",
&opts->conn));
testutil_check(opts->conn->open_session(opts->conn, NULL, NULL, &session));
testutil_check(__wt_snprintf(tableconf, sizeof(tableconf),
"key_format=%s,value_format=%s,leaf_page_max=32k,", opts->table_type == TABLE_ROW ? "Q" : "r",
opts->table_type == TABLE_FIX ? "8t" : "Q"));
testutil_check(session->create(session, opts->uri, tableconf));
/* Create the single record. */
testutil_check(session->open_cursor(session, opts->uri, NULL, NULL, &c));
set_key(c, 1);
set_value(opts, c, 0);
testutil_check(c->insert(c));
testutil_check(c->close(c));
cs = clock();
for (i = 0; i < (int)opts->nthreads; ++i) {
testutil_check(pthread_create(&id[i], NULL, thread_insert_race, opts));
}
while (--i >= 0)
testutil_check(pthread_join(id[i], NULL));
testutil_check(session->open_cursor(session, opts->uri, NULL, NULL, &c));
set_key(c, 1);
testutil_check(c->search(c));
current_value = get_value(opts, c);
expected_value = opts->nthreads * opts->nrecords;
if (opts->table_type == TABLE_FIX)
expected_value %= 256;
if (current_value != expected_value) {
fprintf(stderr, "ERROR: didn't get expected number of changes\n");
fprintf(stderr, "got: %" PRIu64 ", expected: %" PRIu64 "\n", current_value,
opts->nthreads * opts->nrecords);
return (EXIT_FAILURE);
}
testutil_check(session->close(session, NULL));
ce = clock();
printf("%" PRIu64 ": %.2lf\n", opts->nrecords, (ce - cs) / (double)CLOCKS_PER_SEC);
testutil_cleanup(opts);
return (EXIT_SUCCESS);
}
/*
* thread_insert_race --
* Append to a table in a "racy" fashion - that is attempt to insert the same record another
* thread is likely to also be inserting.
*/
void *
thread_insert_race(void *arg)
{
TEST_OPTS *opts;
WT_CONNECTION *conn;
WT_CURSOR *cursor;
WT_DECL_RET;
WT_SESSION *session;
uint64_t i, value, ready_counter_local;
opts = (TEST_OPTS *)arg;
conn = opts->conn;
printf("Running insert thread\n");
testutil_check(conn->open_session(conn, NULL, NULL, &session));
testutil_check(session->open_cursor(session, opts->uri, NULL, NULL, &cursor));
/* Wait until all the threads are ready to go. */
(void)__wt_atomic_add64(&ready_counter, 1);
for (;; __wt_yield()) {
WT_ORDERED_READ(ready_counter_local, ready_counter);
if (ready_counter_local >= opts->nthreads)
break;
}
for (i = 0; i < opts->nrecords; ++i) {
testutil_check(session->begin_transaction(session, "isolation=snapshot"));
set_key(cursor, 1);
testutil_check(cursor->search(cursor));
value = get_value(opts, cursor);
set_key(cursor, 1);
set_value(opts, cursor, value + 1);
if ((ret = cursor->update(cursor)) != 0) {
if (ret == WT_ROLLBACK) {
testutil_check(session->rollback_transaction(session, NULL));
i--;
continue;
}
printf("Error in update: %d\n", ret);
}
testutil_check(session->commit_transaction(session, NULL));
if (i % 10000 == 0) {
printf("insert: %" PRIu64 "\r", i);
fflush(stdout);
}
}
if (i > 10000)
printf("\n");
opts->running = false;
return (NULL);
}
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