aboutsummaryrefslogtreecommitdiffstats
path: root/libibex/testindex.c
blob: e531e3291aea3f14c722a8988c40de4168d39501 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
/* Test code for libibex */

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <glib.h>
#include "ibex_internal.h"

#ifdef ENABLE_THREADS
#include <pthread.h>
#endif

#define TIMEIT
/*#define DO_MCHECK*/

#ifdef TIMEIT
#include <sys/time.h>
#include <unistd.h>
#endif

#ifdef DO_MCHECK
#include <mcheck.h>
#endif

void word_index_mem_dump_info(struct _IBEXWord *idx);

/*
  The following is a routine to generate a Gaussian distribution
  of pseudo random numbers, to make the results a little more
  meaningful
*/

/* boxmuller.c           Implements the Polar form of the Box-Muller
                         Transformation

                      (c) Copyright 1994, Everett F. Carter Jr.
                          Permission is granted by the author to use
                          this software for any application provided this
                          copyright notice is preserved.

*/

#include <stdlib.h>
#include <math.h>

#define ranf() ((float)rand()/(float)RAND_MAX)

static float box_muller(float m, float s)      /* normal random variate generator */
{                                       /* mean m, standard deviation s */
        float x1, x2, w, y1;
        static float y2;
        static int use_last = 0;

        if (use_last)                   /* use value from previous call */
        {
                y1 = y2;
                use_last = 0;
        }
        else
        {
                do {
                        x1 = 2.0 * ranf() - 1.0;
                        x2 = 2.0 * ranf() - 1.0;
                        w = x1 * x1 + x2 * x2;
                } while ( w >= 1.0 );

                w = sqrt( (-2.0 * log( w ) ) / w );
                y1 = x1 * w;
                y2 = x2 * w;
                use_last = 1;
        }

        return( m + y1 * s );
}

/* gets a word from words, using m and s as distribution values */
static char *getword(GPtrArray *words, float m, float s)
{
    int index;

    do {
        index = (int)box_muller(m, s);
    } while (index<0 || index>=words->len);

    return words->pdata[index];
}

#ifdef ENABLE_THREADS
int do_read_words;

static void *
read_words(void *in)
{
    ibex *ib = in;
    GPtrArray *a;
    int lastlen = 0;
    int i;

    while (do_read_words) {
        a = ibex_find(ib, "joneses");
        if (a->len != lastlen) {
            printf("Found %d joneses!\n", a->len);
            lastlen = a->len;
        }
        for (i=0;i<a->len;i++)
            g_free(a->pdata[i]);
        g_ptr_array_free(a, TRUE);
    }
}
#endif



#ifdef DO_MCHECK
static int blowup(int status)
{
    switch(status) {
    case 1:
        printf("Double free failure\n");
        break;
    case 2:
        printf("Memory clobbered before block\n");
        break;
    case 3:
        printf("Memory clobbered after block\n");
        break;
    }
    abort();
    return status;
}
#endif

int main(int argc, char **argv)
{
    int i, j;
    GPtrArray *words;
    char line[256];
    int len;
    FILE *file;
    float m, s;
    ibex *ib;
    GString *buffer;
    int files;
    char *dict;
    int synccount;
#ifdef TIMEIT
    struct timeval start, end;
    unsigned long diff;
#endif
#ifdef ENABLE_THREADS
    pthread_t id;
#endif
    mcheck(blowup);

    words = g_ptr_array_new();
    buffer = g_string_new("");

#ifdef ENABLE_THREADS
    g_thread_init(0);
#undef ENABLE_THREADS
#endif

#ifdef TIMEIT
    gettimeofday(&start, NULL);
#endif

    srand(0xABADF00D);

    synccount = 1000;
    files = 8000;
    dict = "/usr/dict/words";

    /* read words into an array */
    file = fopen(dict, "r");
    if (file == NULL) {
        fprintf(stderr, "Cannot open word file: %s: %s\n", dict, strerror(errno));
        return 1;
    }
    while (fgets(line, sizeof(line), file) != NULL) {
        len = strlen(line);
        if (len>0 && line[len-1]=='\n') {
            line[len-1]=0;
        }
        g_ptr_array_add(words, g_strdup(line));
    }
    fclose(file);
    
    fprintf(stderr, "Read %d words\n", words->len);

    /* *shrug* arbitrary values really */
    m = words->len/2;
    /* well, the average vocabulary of a mailbox is about 10K words */
    s = 1000.0;

    printf("mean is %f, s is %f\n", m, s);

    /* open ibex file */
    ib = ibex_open("test.ibex", O_RDWR|O_CREAT, 0600);
    if (ib == NULL) {
        perror("Creating ibex file\n");
        return 1;
    }

#ifdef ENABLE_THREADS
    do_read_words = 1;
    pthread_create(&id, 0, read_words, ib);
#endif
    printf("Adding %d files\n", files);

    
    /* simulate adding new words to a bunch of files */
    for (j=0;j<200000;j++) {
        /* always new name */
        char *name;
        /* something like 60 words in a typical message, say */
        int count = (int)box_muller(60.0, 20.0);
        int word = (int)box_muller(m, 4000);
        GPtrArray *a;
        static int lastlen = 0;

        /* random name */
        name = words->pdata[word % words->len];

        if (j%1000 == 0) {
            IBEX_LOCK(ib);
            word_index_mem_dump_info(ib->words);
            IBEX_UNLOCK(ib);
        }

        /* lookup word just to test lookup */
        a = ibex_find(ib, name);
        if (a) {
            for (i=0;i<a->len;i++)
                g_free(a->pdata[i]);
            g_ptr_array_free(a, TRUE);
        }

        /* half the time, remove items from the index */
        if (rand() < RAND_MAX/2) {
            ibex_unindex(ib, name);
        } else {
            /* cache the name info */
            ibex_contains_name(ib, name);

            /*printf("Adding %d words to '%s'\n", count, name);*/

            g_string_truncate(buffer, 0);

            /* build up the word buffer */
            for (i=0;i<count;i++) {
                if (i>0)
                    g_string_append_c(buffer, ' ');
                g_string_append(buffer, getword(words, m, 2000));
            }

            /* and index it */
            ibex_index_buffer(ib, name, buffer->str, buffer->len, NULL);
        }


        a = ibex_find(ib, "joneses");
        if (a) {
            if (a->len != lastlen) {
                printf("Found %d joneses!\n", a->len);
                lastlen = a->len;
            }
            for (i=0;i<a->len;i++)
                g_free(a->pdata[i]);
            g_ptr_array_free(a, TRUE);
        }

        if (j%synccount == 0) {
            printf("Reloading index\n");
            IBEX_LOCK(ib);
            word_index_mem_dump_info(ib->words);
            IBEX_UNLOCK(ib);
#ifdef ENABLE_THREADS
            do_read_words = 0;
            pthread_join(id, 0);
#endif
            ibex_save(ib);
            ibex_close(ib);

            ib = ibex_open("test.ibex", O_RDWR|O_CREAT, 0600);
            IBEX_LOCK(ib);
            word_index_mem_dump_info(ib->words);
            IBEX_UNLOCK(ib);
#ifdef ENABLE_THREADS
            do_read_words = 1;
            pthread_create(&id, 0, read_words, ib);
#endif
        }

    }


    IBEX_LOCK(ib);
    word_index_mem_dump_info(ib->words);
    IBEX_UNLOCK(ib);

#ifdef ENABLE_THREADS
    do_read_words = 0;
    pthread_join(id, 0);
#endif

    ibex_close(ib);

#ifdef TIMEIT
    gettimeofday(&end, NULL);
    diff = end.tv_sec * 1000 + end.tv_usec/1000;
    diff -= start.tv_sec * 1000 + start.tv_usec/1000;
    printf("Total time taken %ld.%03ld seconds\n", diff / 1000, diff % 1000);
#endif

    return 0;
}