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210b1f8b42
After this patch, there is but one remaining use of g_thread_init(), which is in tests/slice-threadinit.c, a testcase dedicated to testing the functionality of gslice across a g_thread_init() boundary. This testcase is pretty meaningless these days... probably we should delete it.
307 lines
9.7 KiB
C
307 lines
9.7 KiB
C
/* GLIB sliced memory - fast threaded memory chunk allocator
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* Copyright (C) 2005 Tim Janik
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include <stdio.h>
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#include <string.h>
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#define quick_rand32() (rand_accu = 1664525 * rand_accu + 1013904223, rand_accu)
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static guint prime_size = 1021; /* 769; 509 */
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static gboolean clean_memchunks = FALSE;
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static guint number_of_blocks = 10000; /* total number of blocks allocated */
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static guint number_of_repetitions = 10000; /* number of alloc+free repetitions */
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static gboolean want_corruption = FALSE;
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/* --- old memchunk prototypes (memchunks.c) --- */
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GMemChunk* old_mem_chunk_new (const gchar *name,
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gint atom_size,
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gulong area_size,
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gint type);
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void old_mem_chunk_destroy (GMemChunk *mem_chunk);
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gpointer old_mem_chunk_alloc (GMemChunk *mem_chunk);
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gpointer old_mem_chunk_alloc0 (GMemChunk *mem_chunk);
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void old_mem_chunk_free (GMemChunk *mem_chunk,
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gpointer mem);
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void old_mem_chunk_clean (GMemChunk *mem_chunk);
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void old_mem_chunk_reset (GMemChunk *mem_chunk);
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void old_mem_chunk_print (GMemChunk *mem_chunk);
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void old_mem_chunk_info (void);
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#ifndef G_ALLOC_AND_FREE
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#define G_ALLOC_AND_FREE 2
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#endif
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/* --- functions --- */
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static inline int
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corruption (void)
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{
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if (G_UNLIKELY (want_corruption))
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{
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/* corruption per call likelyness is about 1:4000000 */
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guint32 r = g_random_int() % 8000009;
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return r == 277 ? +1 : r == 281 ? -1 : 0;
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}
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return 0;
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}
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static inline gpointer
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memchunk_alloc (GMemChunk **memchunkp,
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guint size)
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{
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size = MAX (size, 1);
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if (G_UNLIKELY (!*memchunkp))
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*memchunkp = old_mem_chunk_new ("", size, 4096, G_ALLOC_AND_FREE);
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return old_mem_chunk_alloc (*memchunkp);
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}
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static inline void
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memchunk_free (GMemChunk *memchunk,
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gpointer chunk)
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{
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old_mem_chunk_free (memchunk, chunk);
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if (clean_memchunks)
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old_mem_chunk_clean (memchunk);
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}
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static gpointer
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test_memchunk_thread (gpointer data)
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{
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GMemChunk **memchunks;
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guint i, j;
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guint8 **ps;
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guint *ss;
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guint32 rand_accu = 2147483563;
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/* initialize random numbers */
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if (data)
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rand_accu = *(guint32*) data;
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else
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{
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GTimeVal rand_tv;
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g_get_current_time (&rand_tv);
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rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
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}
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/* prepare for memchunk creation */
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memchunks = g_alloca (sizeof (memchunks[0]) * prime_size);
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memset (memchunks, 0, sizeof (memchunks[0]) * prime_size);
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ps = g_new (guint8*, number_of_blocks);
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ss = g_new (guint, number_of_blocks);
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/* create number_of_blocks random sizes */
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for (i = 0; i < number_of_blocks; i++)
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ss[i] = quick_rand32() % prime_size;
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/* allocate number_of_blocks blocks */
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for (i = 0; i < number_of_blocks; i++)
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ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
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for (j = 0; j < number_of_repetitions; j++)
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{
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/* free number_of_blocks/2 blocks */
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for (i = 0; i < number_of_blocks; i += 2)
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memchunk_free (memchunks[ss[i]], ps[i]);
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/* allocate number_of_blocks/2 blocks with new sizes */
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for (i = 0; i < number_of_blocks; i += 2)
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{
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ss[i] = quick_rand32() % prime_size;
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ps[i] = memchunk_alloc (&memchunks[ss[i]], ss[i]);
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}
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}
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/* free number_of_blocks blocks */
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for (i = 0; i < number_of_blocks; i++)
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memchunk_free (memchunks[ss[i]], ps[i]);
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/* alloc and free many equally sized chunks in a row */
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for (i = 0; i < number_of_repetitions; i++)
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{
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guint sz = quick_rand32() % prime_size;
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guint k = number_of_blocks / 100;
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for (j = 0; j < k; j++)
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ps[j] = memchunk_alloc (&memchunks[sz], sz);
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for (j = 0; j < k; j++)
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memchunk_free (memchunks[sz], ps[j]);
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}
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/* cleanout memchunks */
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for (i = 0; i < prime_size; i++)
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if (memchunks[i])
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old_mem_chunk_destroy (memchunks[i]);
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g_free (ps);
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g_free (ss);
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return NULL;
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}
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static gpointer
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test_sliced_mem_thread (gpointer data)
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{
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guint32 rand_accu = 2147483563;
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guint i, j;
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guint8 **ps;
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guint *ss;
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/* initialize random numbers */
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if (data)
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rand_accu = *(guint32*) data;
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else
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{
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GTimeVal rand_tv;
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g_get_current_time (&rand_tv);
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rand_accu = rand_tv.tv_usec + (rand_tv.tv_sec << 16);
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}
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ps = g_new (guint8*, number_of_blocks);
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ss = g_new (guint, number_of_blocks);
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/* create number_of_blocks random sizes */
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for (i = 0; i < number_of_blocks; i++)
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ss[i] = quick_rand32() % prime_size;
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/* allocate number_of_blocks blocks */
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for (i = 0; i < number_of_blocks; i++)
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ps[i] = g_slice_alloc (ss[i] + corruption());
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for (j = 0; j < number_of_repetitions; j++)
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{
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/* free number_of_blocks/2 blocks */
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for (i = 0; i < number_of_blocks; i += 2)
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g_slice_free1 (ss[i] + corruption(), ps[i] + corruption());
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/* allocate number_of_blocks/2 blocks with new sizes */
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for (i = 0; i < number_of_blocks; i += 2)
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{
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ss[i] = quick_rand32() % prime_size;
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ps[i] = g_slice_alloc (ss[i] + corruption());
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}
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}
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/* free number_of_blocks blocks */
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for (i = 0; i < number_of_blocks; i++)
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g_slice_free1 (ss[i] + corruption(), ps[i] + corruption());
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/* alloc and free many equally sized chunks in a row */
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for (i = 0; i < number_of_repetitions; i++)
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{
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guint sz = quick_rand32() % prime_size;
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guint k = number_of_blocks / 100;
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for (j = 0; j < k; j++)
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ps[j] = g_slice_alloc (sz + corruption());
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for (j = 0; j < k; j++)
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g_slice_free1 (sz + corruption(), ps[j] + corruption());
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}
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g_free (ps);
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g_free (ss);
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return NULL;
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}
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static void
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usage (void)
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{
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g_print ("Usage: slice-test [n_threads] [G|S|M|O][f][c][~] [maxblocksize] [seed]\n");
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}
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int
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main (int argc,
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char *argv[])
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{
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guint seed32, *seedp = NULL;
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gboolean ccounters = FALSE, use_memchunks = FALSE;
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guint n_threads = 1;
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const gchar *mode = "slab allocator + magazine cache", *emode = " ";
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if (argc > 1)
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n_threads = g_ascii_strtoull (argv[1], NULL, 10);
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if (argc > 2)
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{
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guint i, l = strlen (argv[2]);
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for (i = 0; i < l; i++)
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switch (argv[2][i])
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{
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case 'G': /* GLib mode */
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g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
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g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, FALSE);
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mode = "slab allocator + magazine cache";
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break;
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case 'S': /* slab mode */
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g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, FALSE);
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g_slice_set_config (G_SLICE_CONFIG_BYPASS_MAGAZINES, TRUE);
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mode = "slab allocator";
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break;
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case 'M': /* malloc mode */
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g_slice_set_config (G_SLICE_CONFIG_ALWAYS_MALLOC, TRUE);
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mode = "system malloc";
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break;
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case 'O': /* old memchunks */
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use_memchunks = TRUE;
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mode = "old memchunks";
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break;
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case 'f': /* eager freeing */
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g_slice_set_config (G_SLICE_CONFIG_WORKING_SET_MSECS, 0);
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clean_memchunks = TRUE;
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emode = " with eager freeing";
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break;
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case 'c': /* print contention counters */
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ccounters = TRUE;
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break;
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case '~':
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want_corruption = TRUE; /* force occasional corruption */
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break;
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default:
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usage();
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return 1;
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}
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}
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if (argc > 3)
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prime_size = g_ascii_strtoull (argv[3], NULL, 10);
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if (argc > 4)
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{
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seed32 = g_ascii_strtoull (argv[4], NULL, 10);
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seedp = &seed32;
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}
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if (argc <= 1)
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usage();
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{
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gchar strseed[64] = "<random>";
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GThread **threads;
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guint i;
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if (seedp)
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g_snprintf (strseed, 64, "%u", *seedp);
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g_print ("Starting %d threads allocating random blocks <= %u bytes with seed=%s using %s%s\n", n_threads, prime_size, strseed, mode, emode);
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threads = g_alloca (sizeof(GThread*) * n_threads);
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if (!use_memchunks)
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for (i = 0; i < n_threads; i++)
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threads[i] = g_thread_create (test_sliced_mem_thread, seedp, TRUE, NULL);
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else
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{
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for (i = 0; i < n_threads; i++)
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threads[i] = g_thread_create (test_memchunk_thread, seedp, TRUE, NULL);
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}
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for (i = 0; i < n_threads; i++)
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g_thread_join (threads[i]);
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if (ccounters)
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{
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guint n, n_chunks = g_slice_get_config (G_SLICE_CONFIG_CHUNK_SIZES);
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g_print (" ChunkSize | MagazineSize | Contention\n");
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for (i = 0; i < n_chunks; i++)
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{
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gint64 *vals = g_slice_get_config_state (G_SLICE_CONFIG_CONTENTION_COUNTER, i, &n);
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g_print (" %9" G_GINT64_FORMAT " | %9" G_GINT64_FORMAT " | %9" G_GINT64_FORMAT "\n", vals[0], vals[2], vals[1]);
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g_free (vals);
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}
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}
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else
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g_print ("Done.\n");
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return 0;
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}
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}
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