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.
24 #define quick_rand32() (rand_accu = 1664525 * rand_accu + 1013904223, rand_accu)
25 static guint prime_size = 1021; /* 769; 509 */
26 static gboolean clean_memchunks = FALSE;
27 static guint number_of_blocks = 10000; /* total number of blocks allocated */
28 static guint number_of_repetitions = 10000; /* number of alloc+free repetitions */
29 static gboolean want_corruption = FALSE;
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 --- */
54 if (G_UNLIKELY (want_corruption))
56 /* corruption per call likelyness is about 1:4000000 */
57 guint32 r = g_random_int() % 8000009;
58 return r == 277 ? +1 : r == 281 ? -1 : 0;
63 static inline gpointer
64 memchunk_alloc (GMemChunk **memchunkp,
68 if (G_UNLIKELY (!*memchunkp))
69 *memchunkp = old_mem_chunk_new ("", size, 4096, G_ALLOC_AND_FREE);
70 return old_mem_chunk_alloc (*memchunkp);
74 memchunk_free (GMemChunk *memchunk,
77 old_mem_chunk_free (memchunk, chunk);
79 old_mem_chunk_clean (memchunk);
83 test_memchunk_thread (gpointer data)
85 GMemChunk **memchunks;
89 guint32 rand_accu = 2147483563;
90 /* initialize random numbers */
92 rand_accu = *(guint32*) data;
96 g_get_current_time (&rand_tv);
97 rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
100 /* prepare for memchunk creation */
101 memchunks = g_alloca (sizeof (memchunks[0]) * prime_size);
102 memset (memchunks, 0, sizeof (memchunks[0]) * prime_size);
104 ps = g_new (guint8*, number_of_blocks);
105 ss = g_new (guint, number_of_blocks);
106 /* create number_of_blocks random sizes */
107 for (i = 0; i < number_of_blocks; i++)
108 ss[i] = quick_rand32() % prime_size;
109 /* allocate number_of_blocks blocks */
110 for (i = 0; i < number_of_blocks; i++)
111 ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
112 for (j = 0; j < number_of_repetitions; j++)
114 /* free number_of_blocks/2 blocks */
115 for (i = 0; i < number_of_blocks; i += 2)
116 memchunk_free (memchunks[ss[i]], ps[i]);
117 /* allocate number_of_blocks/2 blocks with new sizes */
118 for (i = 0; i < number_of_blocks; i += 2)
120 ss[i] = quick_rand32() % prime_size;
121 ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
124 /* free number_of_blocks blocks */
125 for (i = 0; i < number_of_blocks; i++)
126 memchunk_free (memchunks[ss[i]], ps[i]);
127 /* alloc and free many equally sized chunks in a row */
128 for (i = 0; i < number_of_repetitions; i++)
130 guint sz = quick_rand32() % prime_size;
131 guint k = number_of_blocks / 100;
132 for (j = 0; j < k; j++)
133 ps[j] = memchunk_alloc (&memchunks[sz], sz);
134 for (j = 0; j < k; j++)
135 memchunk_free (memchunks[sz], ps[j]);
137 /* cleanout memchunks */
138 for (i = 0; i < prime_size; i++)
140 old_mem_chunk_destroy (memchunks[i]);
148 test_sliced_mem_thread (gpointer data)
150 guint32 rand_accu = 2147483563;
155 /* initialize random numbers */
157 rand_accu = *(guint32*) data;
161 g_get_current_time (&rand_tv);
162 rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
165 ps = g_new (guint8*, number_of_blocks);
166 ss = g_new (guint, number_of_blocks);
167 /* create number_of_blocks random sizes */
168 for (i = 0; i < number_of_blocks; i++)
169 ss[i] = quick_rand32() % prime_size;
170 /* allocate number_of_blocks blocks */
171 for (i = 0; i < number_of_blocks; i++)
172 ps[i] = g_slice_alloc (ss[i] + corruption());
173 for (j = 0; j < number_of_repetitions; j++)
175 /* free number_of_blocks/2 blocks */
176 for (i = 0; i < number_of_blocks; i += 2)
177 g_slice_free1 (ss[i] + corruption(), ps[i] + corruption());
178 /* allocate number_of_blocks/2 blocks with new sizes */
179 for (i = 0; i < number_of_blocks; i += 2)
181 ss[i] = quick_rand32() % prime_size;
182 ps[i] = g_slice_alloc (ss[i] + corruption());
185 /* free number_of_blocks blocks */
186 for (i = 0; i < number_of_blocks; i++)
187 g_slice_free1 (ss[i] + corruption(), ps[i] + corruption());
188 /* alloc and free many equally sized chunks in a row */
189 for (i = 0; i < number_of_repetitions; i++)
191 guint sz = quick_rand32() % prime_size;
192 guint k = number_of_blocks / 100;
193 for (j = 0; j < k; j++)
194 ps[j] = g_slice_alloc (sz + corruption());
195 for (j = 0; j < k; j++)
196 g_slice_free1 (sz + corruption(), ps[j] + corruption());
207 g_print ("Usage: slice-test [n_threads] [G|S|M|O][f][c][~] [maxblocksize] [seed]\n");
214 guint seed32, *seedp = NULL;
215 gboolean ccounters = FALSE, use_memchunks = FALSE;
217 const gchar *mode = "slab allocator + magazine cache", *emode = " ";
219 n_threads = g_ascii_strtoull (argv[1], NULL, 10);
222 guint i, l = strlen (argv[2]);
223 for (i = 0; i < l; i++)
226 case 'G': /* GLib mode */
227 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
228 g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, FALSE);
229 mode = "slab allocator + magazine cache";
231 case 'S': /* slab mode */
232 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
233 g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, TRUE);
234 mode = "slab allocator";
236 case 'M': /* malloc mode */
237 g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, TRUE);
238 mode = "system malloc";
240 case 'O': /* old memchunks */
241 use_memchunks = TRUE;
242 mode = "old memchunks";
244 case 'f': /* eager freeing */
245 g_slice_set_config (G_SLICE_CONFIG_WORKING_SET_MSECS, 0);
246 clean_memchunks = TRUE;
247 emode = " with eager freeing";
249 case 'c': /* print contention counters */
253 want_corruption = TRUE; /* force occasional corruption */
261 prime_size = g_ascii_strtoull (argv[3], NULL, 10);
264 seed32 = g_ascii_strtoull (argv[4], NULL, 10);
268 g_thread_init (NULL);
274 gchar strseed[64] = "<random>";
279 g_snprintf (strseed, 64, "%u", *seedp);
280 g_print ("Starting %d threads allocating random blocks <= %u bytes with seed=%s using %s%s\n", n_threads, prime_size, strseed, mode, emode);
282 threads = g_alloca (sizeof(GThread*) * n_threads);
284 for (i = 0; i < n_threads; i++)
285 threads[i] = g_thread_create (test_sliced_mem_thread, seedp, TRUE, NULL);
288 old_mem_chunks_init();
289 for (i = 0; i < n_threads; i++)
290 threads[i] = g_thread_create (test_memchunk_thread, seedp, TRUE, NULL);
292 for (i = 0; i < n_threads; i++)
293 g_thread_join (threads[i]);
297 guint n, n_chunks = g_slice_get_config (G_SLICE_CONFIG_CHUNK_SIZES);
298 g_print (" ChunkSize | MagazineSize | Contention\n");
299 for (i = 0; i < n_chunks; i++)
301 gint64 *vals = g_slice_get_config_state (G_SLICE_CONFIG_CONTENTION_COUNTER, i, &n);
302 g_print (" %9llu | %9llu | %9llu\n", vals[0], vals[2], vals[1]);