1 /* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 // vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
3 #ident "$Id$"
4 /*======
5 This file is part of PerconaFT.
6
7
8 Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
9
10 PerconaFT is free software: you can redistribute it and/or modify
11 it under the terms of the GNU General Public License, version 2,
12 as published by the Free Software Foundation.
13
14 PerconaFT is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
21
22 ----------------------------------------
23
24 PerconaFT is free software: you can redistribute it and/or modify
25 it under the terms of the GNU Affero General Public License, version 3,
26 as published by the Free Software Foundation.
27
28 PerconaFT is distributed in the hope that it will be useful,
29 but WITHOUT ANY WARRANTY; without even the implied warranty of
30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 GNU Affero General Public License for more details.
32
33 You should have received a copy of the GNU Affero General Public License
34 along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
35 ======= */
36
37 #ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
38
39 // this test verifies that the toku thread pool is resilient when hitting the nproc limit.
40
41 #include <util/threadpool.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <assert.h>
45 #include <string.h>
46 #include <unistd.h>
47 #include <errno.h>
48 #include <sys/resource.h>
49
50 int verbose = 0;
51
usage(void)52 static int usage(void) {
53 fprintf(stderr, "[-q] [-v] [--verbose] (%d)\n", verbose);
54 return 1;
55 }
56
f(void * arg)57 static void *f(void *arg) {
58 return arg;
59 }
60
dotest(int the_limit)61 static int dotest(int the_limit) {
62 if (verbose)
63 fprintf(stderr, "%s:%u %d\n", __FILE__, __LINE__, the_limit);
64 int r;
65 struct toku_thread_pool *pool = nullptr;
66 r = toku_thread_pool_create(&pool, 10);
67 assert(r == 0 && pool != nullptr);
68
69 struct rlimit current_nproc_limit;
70 r = getrlimit(RLIMIT_NPROC, ¤t_nproc_limit);
71 assert(r == 0);
72
73 struct rlimit new_nproc_limit = current_nproc_limit;
74 new_nproc_limit.rlim_cur = the_limit;
75 r = setrlimit(RLIMIT_NPROC, &new_nproc_limit);
76 assert(r == 0);
77
78 int want_n = 20;
79 int got_n = want_n;
80 r = toku_thread_pool_run(pool, 0, &got_n, f, nullptr);
81 if (r == 0)
82 assert(want_n == got_n);
83 else {
84 assert(r == EWOULDBLOCK);
85 assert(got_n <= want_n);
86 }
87
88 r = setrlimit(RLIMIT_NPROC, ¤t_nproc_limit);
89 assert(r == 0);
90
91 if (verbose)
92 toku_thread_pool_print(pool, stderr);
93 toku_thread_pool_destroy(&pool);
94 return got_n > 0;
95 }
96
main(int argc,char * argv[])97 int main(int argc, char *argv[]) {
98 // parse args
99 for (int i = 1; i < argc; i++) {
100 char *arg = argv[i];
101 if (arg[0] != '-')
102 break;
103 if (strcmp(arg, "-v") == 0 || strcmp(arg, "--verbose") == 0) {
104 verbose = verbose+1;
105 continue;
106 }
107 if (strcmp(arg, "-q") == 0) {
108 verbose = verbose > 0 ? verbose-1 : 0;
109 continue;
110 }
111 return usage();
112 }
113 // set increasing nproc limits until the test succeeds in hitting the limit after > 0 threads are created
114 for (int i = 0; 1; i++) {
115 if (dotest(i))
116 break;
117 }
118 return 0;
119 }
120