#56 benchmark that demos lock escalation stalls

locktree/tests/locktree_escalation_stalls.cc

+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*
+COPYING CONDITIONS NOTICE:
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation, and provided that the
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+      * Redistributions of source code must retain this COPYING
+        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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+      * Redistributions in binary form must reproduce this COPYING
+        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
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+  You should have received a copy of the GNU General Public License
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+COPYRIGHT NOTICE:
+
+  TokuDB, Tokutek Fractal Tree Indexing Library.
+  Copyright (C) 2007-2013 Tokutek, Inc.
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+DISCLAIMER:
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+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+UNIVERSITY PATENT NOTICE:
+
+  The technology is licensed by the Massachusetts Institute of
+  Technology, Rutgers State University of New Jersey, and the Research
+  Foundation of State University of New York at Stony Brook under
+  United States of America Serial No. 11/760379 and to the patents
+  and/or patent applications resulting from it.
+
+PATENT MARKING NOTICE:
+
+  This software is covered by US Patent No. 8,185,551.
+
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+  licensable by Tokutek, both currently or in the future; and that in
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+*/
+
+#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."
+#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
+
+#include <stdio.h>
+#include "locktree.h"
+#include "test.h"
+
+using namespace toku;
+
+static int verbose = 0;
+
+static void locktree_release_lock(locktree *lt, TXNID txn_id, int64_t left_k, int64_t right_k) {
+    range_buffer buffer;
+    buffer.create();
+    DBT left; toku_fill_dbt(&left, &left_k, sizeof left_k);
+    DBT right; toku_fill_dbt(&right, &right_k, sizeof right_k);
+    buffer.append(&left, &right);
+    lt->release_locks(txn_id, &buffer);
+    buffer.destroy();
+}
+
+// grab a write range lock on int64 keys bounded by left_k and right_k
+static int locktree_write_lock(locktree *lt, TXNID txn_id, int64_t left_k, int64_t right_k) {
+    DBT left; toku_fill_dbt(&left, &left_k, sizeof left_k);
+    DBT right; toku_fill_dbt(&right, &right_k, sizeof right_k);
+    return lt->acquire_write_lock(txn_id, &left, &right, nullptr);
+}
+
+static void run_big_txn(locktree::manager *mgr, locktree *lt, TXNID txn_id) {
+    mgr = mgr;
+    for (int64_t i = 0; 1; i++) {
+        uint64_t t_start = toku_current_time_microsec();
+        int r = locktree_write_lock(lt, txn_id, i, i);
+        assert(r == 0);
+        uint64_t t_end = toku_current_time_microsec();
+        uint64_t t_duration = t_end - t_start;
+        if (t_duration > 100000) {
+            printf("%u %s %" PRId64 " %" PRIu64 "\n", toku_os_gettid(), __FUNCTION__, i, t_duration);
+        }
+    }
+}
+
+static void run_small_txn(locktree::manager *mgr, locktree *lt, TXNID txn_id, int64_t k) {
+    mgr = mgr;
+    for (int64_t i = 0; 1; i++) {
+        uint64_t t_start = toku_current_time_microsec();
+        int r = locktree_write_lock(lt, txn_id, k, k);
+        assert(r == 0);
+        uint64_t t_end = toku_current_time_microsec();
+        uint64_t t_duration = t_end - t_start;
+        if (t_duration > 100000) {
+            printf("%u %s %" PRId64 " %" PRIu64 "\n", toku_os_gettid(), __FUNCTION__, i, t_duration);
+        }
+        locktree_release_lock(lt, txn_id, i, i);
+    }
+}
+
+struct arg {
+    locktree::manager *mgr;
+    locktree *lt;
+    TXNID txn_id;
+    int64_t k;
+};
+
+static void *big_f(void *_arg) {
+    struct arg *arg = (struct arg *) _arg;
+    run_big_txn(arg->mgr, arg->lt, arg->txn_id);
+    return arg;
+}
+
+static void *small_f(void *_arg) {
+    struct arg *arg = (struct arg *) _arg;
+    run_small_txn(arg->mgr, arg->lt, arg->txn_id, arg->k);
+    return arg;
+}
+
+static void e_callback(TXNID txnid, const locktree *lt, const range_buffer &buffer, void *extra) {
+    if (verbose)
+        printf("%u %s %" PRIu64 " %p %d %p\n", toku_os_gettid(), __FUNCTION__, txnid, lt, buffer.get_num_ranges(), extra);
+}
+
+int main(int argc, const char *argv[]) {
+    if (argc == 1 || argv == nullptr)
+        return 0;
+    int r;
+
+    // create a manager
+    locktree::manager mgr;
+    mgr.create(nullptr, nullptr, e_callback, nullptr);
+    mgr.set_max_lock_memory(1000000000);
+
+    // create lock trees
+    DESCRIPTOR desc_0 = nullptr;
+    DICTIONARY_ID dict_id_0 = { 1 };
+    locktree *lt_0 = mgr.get_lt(dict_id_0, desc_0, compare_dbts, nullptr);
+
+    DESCRIPTOR desc_1 = nullptr;
+    DICTIONARY_ID dict_id_1 = { 2 };
+    locktree *lt_1 = mgr.get_lt(dict_id_1, desc_1, compare_dbts, nullptr);
+
+    struct arg big_arg = { &mgr, lt_0, 1000 };
+    pthread_t big_id;
+    r = toku_pthread_create(&big_id, nullptr, big_f, &big_arg);
+    assert(r == 0);
+
+    const int n_small = 7;
+    pthread_t small_ids[n_small];
+    struct arg small_args[n_small];
+
+    for (int i = 0; i < n_small; i++) {
+        small_args[i] = { &mgr, lt_1, (TXNID)(2000+i), i };
+        r = toku_pthread_create(&small_ids[i], nullptr, small_f, &small_args[i]);
+        assert(r == 0);
+    }
+
+    void *ret;
+    r = toku_pthread_join(big_id, &ret);
+    assert(r == 0);
+
+    for (int i = 0; i < n_small; i++) {
+        r = toku_pthread_join(small_ids[i], &ret);
+        assert(r == 0);
+    }
+
+    // cleanup
+    mgr.release_lt(lt_0);
+    mgr.release_lt(lt_1);
+    mgr.destroy();
+
+    return 0;
+}