1 /* GLIB sliced memory - fast threaded memory chunk allocator
2 * Copyright (C) 2005 Tim Janik
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
23 #include <sys/time.h> // gettimeofday
25 #define quick_rand32() (rand_accu = 1664525 * rand_accu + 1013904223, rand_accu)
26 static guint prime_size = 1021; // 769; // 509
27 static gboolean clean_memchunks = FALSE;
28 static guint number_of_blocks = 10000; /* total number of blocks allocated */
29 static guint number_of_repetitions = 10000; /* number of alloc+free repetitions */
31 /* --- old memchunk prototypes (memchunks.c) --- */
32 void old_mem_chunks_init (void);
33 GMemChunk* old_mem_chunk_new (const gchar *name,
37 void old_mem_chunk_destroy (GMemChunk *mem_chunk);
38 gpointer old_mem_chunk_alloc (GMemChunk *mem_chunk);
39 gpointer old_mem_chunk_alloc0 (GMemChunk *mem_chunk);
40 void old_mem_chunk_free (GMemChunk *mem_chunk,
42 void old_mem_chunk_clean (GMemChunk *mem_chunk);
43 void old_mem_chunk_reset (GMemChunk *mem_chunk);
44 void old_mem_chunk_print (GMemChunk *mem_chunk);
45 void old_mem_chunk_info (void);
46 #ifndef G_ALLOC_AND_FREE
47 #define G_ALLOC_AND_FREE 2
50 /* --- functions --- */
51 static inline gpointer
52 memchunk_alloc (GMemChunk **memchunkp,
56 if (G_UNLIKELY (!*memchunkp))
57 *memchunkp = old_mem_chunk_new ("", size, 4096, G_ALLOC_AND_FREE);
58 return old_mem_chunk_alloc (*memchunkp);
62 memchunk_free (GMemChunk *memchunk,
65 old_mem_chunk_free (memchunk, chunk);
67 old_mem_chunk_clean (memchunk);
71 test_memchunk_thread (gpointer data)
73 GMemChunk **memchunks;
77 guint32 rand_accu = 2147483563;
78 /* initialize random numbers */
80 rand_accu = *(guint32*) data;
83 struct timeval rand_tv;
84 gettimeofday (&rand_tv, NULL);
85 rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
88 /* prepare for memchunk creation */
89 memchunks = g_alloca (sizeof (memchunks[0]) * prime_size);
90 memset (memchunks, 0, sizeof (memchunks[0]) * prime_size);
92 ps = g_new (guint8*, number_of_blocks);
93 ss = g_new (guint, number_of_blocks);
94 /* create number_of_blocks random sizes */
95 for (i = 0; i < number_of_blocks; i++)
96 ss[i] = quick_rand32() % prime_size;
97 /* allocate number_of_blocks blocks */
98 for (i = 0; i < number_of_blocks; i++)
99 ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
100 for (j = 0; j < number_of_repetitions; j++)
102 /* free number_of_blocks/2 blocks */
103 for (i = 0; i < number_of_blocks; i += 2)
104 memchunk_free (memchunks[ss[i]], ps[i]);
105 /* allocate number_of_blocks/2 blocks with new sizes */
106 for (i = 0; i < number_of_blocks; i += 2)
108 ss[i] = quick_rand32() % prime_size;
109 ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
112 /* free number_of_blocks blocks */
113 for (i = 0; i < number_of_blocks; i++)
114 memchunk_free (memchunks[ss[i]], ps[i]);
115 /* alloc and free many equally sized chunks in a row */
116 for (i = 0; i < number_of_repetitions; i++)
118 guint sz = quick_rand32() % prime_size;
119 guint k = number_of_blocks / 100;
120 for (j = 0; j < k; j++)
121 ps[j] = memchunk_alloc (&memchunks[sz], sz);
122 for (j = 0; j < k; j++)
123 memchunk_free (memchunks[sz], ps[j]);
125 /* cleanout memchunks */
126 for (i = 0; i < prime_size; i++)
128 old_mem_chunk_destroy (memchunks[i]);
136 test_sliced_mem_thread (gpointer data)
138 guint32 rand_accu = 2147483563;
139 /* initialize random numbers */
141 rand_accu = *(guint32*) data;
144 struct timeval rand_tv;
145 gettimeofday (&rand_tv, NULL);
146 rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
150 guint8 **ps = g_new (guint8*, number_of_blocks);
151 guint *ss = g_new (guint, number_of_blocks);
152 /* create number_of_blocks random sizes */
153 for (i = 0; i < number_of_blocks; i++)
154 ss[i] = quick_rand32() % prime_size;
155 /* allocate number_of_blocks blocks */
156 for (i = 0; i < number_of_blocks; i++)
157 ps[i] = g_slice_alloc (ss[i]);
158 for (j = 0; j < number_of_repetitions; j++)
160 /* free number_of_blocks/2 blocks */
161 for (i = 0; i < number_of_blocks; i += 2)
162 g_slice_free1 (ss[i], ps[i]);
163 /* allocate number_of_blocks/2 blocks with new sizes */
164 for (i = 0; i < number_of_blocks; i += 2)
166 ss[i] = quick_rand32() % prime_size;
167 ps[i] = g_slice_alloc (ss[i]);
170 /* free number_of_blocks blocks */
171 for (i = 0; i < number_of_blocks; i++)
172 g_slice_free1 (ss[i], ps[i]);
173 /* alloc and free many equally sized chunks in a row */
174 for (i = 0; i < number_of_repetitions; i++)
176 guint sz = quick_rand32() % prime_size;
177 guint k = number_of_blocks / 100;
178 for (j = 0; j < k; j++)
179 ps[j] = g_slice_alloc (sz);
180 for (j = 0; j < k; j++)
181 g_slice_free1 (sz, ps[j]);
192 g_print ("Usage: slice-test [n_threads] [G|S|M|O][f][c] [maxblocksize] [seed]\n");
199 guint seed32, *seedp = NULL;
200 gboolean ccounters = FALSE, use_memchunks = FALSE;
202 const gchar *mode = "slab allocator + magazine cache", *emode = " ";
204 n_threads = g_ascii_strtoull (argv[1], NULL, 10);
207 guint i, l = strlen (argv[2]);
208 for (i = 0; i < l; i++)
211 case 'G': /* GLib mode */
212 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
213 g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, FALSE);
214 mode = "slab allocator + magazine cache";
216 case 'S': /* slab mode */
217 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
218 g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, TRUE);
219 mode = "slab allocator";
221 case 'M': /* malloc mode */
222 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, TRUE);
223 mode = "system malloc";
225 case 'O': /* old memchunks */
226 use_memchunks = TRUE;
227 mode = "old memchunks";
229 case 'f': /* eager freeing */
230 g_slice_set_config (G_SLICE_CONFIG_WORKING_SET_MSECS, 0);
231 clean_memchunks = TRUE;
232 emode = " with eager freeing";
234 case 'c': /* print contention counters */
243 prime_size = g_ascii_strtoull (argv[3], NULL, 10);
246 seed32 = g_ascii_strtoull (argv[4], NULL, 10);
250 g_thread_init (NULL);
255 gchar strseed[64] = "<random>";
257 g_snprintf (strseed, 64, "%u", *seedp);
258 g_print ("Starting %d threads allocating random blocks <= %u bytes with seed=%s using %s%s\n", n_threads, prime_size, strseed, mode, emode);
260 GThread *threads[n_threads];
263 for (i = 0; i < n_threads; i++)
264 threads[i] = g_thread_create_full (test_sliced_mem_thread, seedp, 0, TRUE, FALSE, 0, NULL);
267 old_mem_chunks_init();
268 for (i = 0; i < n_threads; i++)
269 threads[i] = g_thread_create_full (test_memchunk_thread, seedp, 0, TRUE, FALSE, 0, NULL);
271 for (i = 0; i < n_threads; i++)
272 g_thread_join (threads[i]);
276 guint n, n_chunks = g_slice_get_config (G_SLICE_CONFIG_CHUNK_SIZES);
277 g_print (" ChunkSize | MagazineSize | Contention\n");
278 for (i = 0; i < n_chunks; i++)
280 gint64 *vals = g_slice_get_config_state (G_SLICE_CONFIG_CONTENTION_COUNTER, i, &n);
281 g_print (" %9llu | %9llu | %9llu\n", vals[0], vals[2], vals[1]);