* what an access pattern would look like.
*
* For instance, the following would generate a zipf distribution
- * with theta 1.2, using 100,000 values and split the reporting into
+ * with theta 1.2, using 262144 (1 GB / 4096) values and split the reporting into
* 20 buckets:
*
- * t/genzipf zipf 1.2 100000 20
+ * ./t/fio-genzipf -t zipf -i 1.2 -g 1 -b 4096 -o 20
*
* Only the distribution type (zipf or pareto) and spread input need
* to be given, if not given defaults are used.
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
+#include <unistd.h>
#include "../lib/zipf.h"
+#include "../lib/gauss.h"
+#include "../flist.h"
+#include "../hash.h"
-#define DEF_NR 1000000
-#define DEF_NR_OUTPUT 23
+#define DEF_NR_OUTPUT 20
-static int val_cmp(const void *p1, const void *p2)
+struct node {
+ struct flist_head list;
+ unsigned long long val;
+ unsigned long hits;
+};
+
+static struct flist_head *hash;
+static unsigned long hash_bits = 24;
+static unsigned long hash_size = 1 << 24;
+
+enum {
+ TYPE_NONE = 0,
+ TYPE_ZIPF,
+ TYPE_PARETO,
+ TYPE_NORMAL,
+};
+static const char *dist_types[] = { "None", "Zipf", "Pareto", "Normal" };
+
+enum {
+ OUTPUT_NORMAL,
+ OUTPUT_CSV,
+};
+
+static int dist_type = TYPE_ZIPF;
+static unsigned long gb_size = 500;
+static unsigned long block_size = 4096;
+static unsigned long output_nranges = DEF_NR_OUTPUT;
+static double percentage;
+static double dist_val;
+static int output_type = OUTPUT_NORMAL;
+
+#define DEF_ZIPF_VAL 1.2
+#define DEF_PARETO_VAL 0.3
+
+static struct node *hash_lookup(unsigned long long val)
{
- const unsigned long *v1 = p1;
- const unsigned long *v2 = p2;
+ struct flist_head *l = &hash[hash_long(val, hash_bits)];
+ struct flist_head *entry;
+ struct node *n;
+
+ flist_for_each(entry, l) {
+ n = flist_entry(entry, struct node, list);
+ if (n->val == val)
+ return n;
+ }
- return *v1 - *v2;
+ return NULL;
}
-int main(int argc, char *argv[])
+static struct node *hash_insert(struct node *n, unsigned long long val)
{
- unsigned long nranges, output_nranges;
- unsigned long *vals;
- unsigned long i, j, nr_vals, cur_vals, max_val, interval;
- double *output, perc, perc_i;
- struct zipf_state zs;
- int use_zipf;
- double val;
+ struct flist_head *l = &hash[hash_long(val, hash_bits)];
- if (argc < 3) {
- printf("%s: {zipf,pareto} val values [output ranges]\n", argv[0]);
- return 1;
- }
+ n->val = val;
+ n->hits = 1;
+ flist_add_tail(&n->list, l);
+ return n;
+}
- if (!strcmp(argv[1], "zipf"))
- use_zipf = 1;
- else if (!strcmp(argv[1], "pareto"))
- use_zipf = 0;
- else {
- printf("Bad distribution type <%s>\n", argv[1]);
- return 1;
+static void usage(void)
+{
+ printf("genzipf: test zipf/pareto values for fio input\n");
+ printf("\t-h\tThis help screen\n");
+ printf("\t-p\tGenerate size of data set that are hit by this percentage\n");
+ printf("\t-t\tDistribution type (zipf, pareto, or normal)\n");
+ printf("\t-i\tDistribution algorithm input (zipf theta, pareto power,\n"
+ "\t\tor normal %% deviation)\n");
+ printf("\t-b\tBlock size of a given range (in bytes)\n");
+ printf("\t-g\tSize of data set (in gigabytes)\n");
+ printf("\t-o\tNumber of output rows\n");
+ printf("\t-c\tOutput ranges in CSV format\n");
+}
+
+static int parse_options(int argc, char *argv[])
+{
+ const char *optstring = "t:g:i:o:b:p:ch";
+ int c, dist_val_set = 0;
+
+ while ((c = getopt(argc, argv, optstring)) != -1) {
+ switch (c) {
+ case 'h':
+ usage();
+ return 1;
+ case 'p':
+ percentage = atof(optarg);
+ break;
+ case 'b':
+ block_size = strtoul(optarg, NULL, 10);
+ break;
+ case 't':
+ if (!strncmp(optarg, "zipf", 4))
+ dist_type = TYPE_ZIPF;
+ else if (!strncmp(optarg, "pareto", 6))
+ dist_type = TYPE_PARETO;
+ else if (!strncmp(optarg, "normal", 6))
+ dist_type = TYPE_NORMAL;
+ else {
+ printf("wrong dist type: %s\n", optarg);
+ return 1;
+ }
+ break;
+ case 'g':
+ gb_size = strtoul(optarg, NULL, 10);
+ break;
+ case 'i':
+ dist_val = atof(optarg);
+ dist_val_set = 1;
+ break;
+ case 'o':
+ output_nranges = strtoul(optarg, NULL, 10);
+ break;
+ case 'c':
+ output_type = OUTPUT_CSV;
+ break;
+ default:
+ printf("bad option %c\n", c);
+ return 1;
+ }
}
- val = atof(argv[2]);
+ if (dist_type == TYPE_PARETO) {
+ if ((dist_val >= 1.00 || dist_val < 0.00)) {
+ printf("pareto input must be > 0.00 and < 1.00\n");
+ return 1;
+ }
+ if (!dist_val_set)
+ dist_val = DEF_PARETO_VAL;
+ } else if (dist_type == TYPE_ZIPF) {
+ if (dist_val == 1.0) {
+ printf("zipf input must be different than 1.0\n");
+ return 1;
+ }
+ if (!dist_val_set)
+ dist_val = DEF_ZIPF_VAL;
+ }
- nranges = DEF_NR;
- output_nranges = DEF_NR_OUTPUT;
+ return 0;
+}
- if (argc >= 4)
- nranges = strtoul(argv[3], NULL, 10);
- if (argc >= 5)
- output_nranges = strtoul(argv[4], NULL, 10);
+struct output_sum {
+ double output;
+ unsigned int nranges;
+};
- printf("Generating %s distribution with %f input and %lu ranges.\n", use_zipf ? "zipf" : "pareto", val, nranges);
+static int node_cmp(const void *p1, const void *p2)
+{
+ const struct node *n1 = p1;
+ const struct node *n2 = p2;
- if (use_zipf)
- zipf_init(&zs, nranges, val);
- else
- pareto_init(&zs, nranges, val);
+ return n2->hits - n1->hits;
+}
- vals = malloc(nranges * sizeof(unsigned long));
+static void output_csv(struct node *nodes, unsigned long nnodes)
+{
+ unsigned long i;
- max_val = nr_vals = 0;
- for (i = 0; i < nranges; i++) {
- if (use_zipf)
- vals[nr_vals] = zipf_next(&zs);
- else
- vals[nr_vals] = pareto_next(&zs);
+ printf("rank, count\n");
+ for (i = 0; i < nnodes; i++)
+ printf("%lu, %lu\n", i, nodes[i].hits);
+}
- if (vals[nr_vals] > max_val)
- max_val = vals[nr_vals];
- nr_vals++;
- }
+static void output_normal(struct node *nodes, unsigned long nnodes,
+ unsigned long nranges)
+{
+ unsigned long i, j, cur_vals, interval_step, next_interval, total_vals;
+ unsigned long blocks = percentage * nnodes / 100;
+ double hit_percent_sum = 0;
+ unsigned long long hit_sum = 0;
+ double perc, perc_i;
+ struct output_sum *output_sums;
- qsort(vals, nr_vals, sizeof(unsigned long), val_cmp);
+ interval_step = (nnodes - 1) / output_nranges + 1;
+ next_interval = interval_step;
+ output_sums = malloc(output_nranges * sizeof(struct output_sum));
- interval = (max_val + output_nranges - 1) / output_nranges;
+ for (i = 0; i < output_nranges; i++) {
+ output_sums[i].output = 0.0;
+ output_sums[i].nranges = 0;
+ }
- output = malloc(output_nranges * sizeof(double));
+ j = total_vals = cur_vals = 0;
- for (i = j = 0, cur_vals = 0; i < nr_vals; i++) {
- if (vals[i] > interval) {
- output[j] = (double) (cur_vals + 1) / (double) nr_vals;
- output[j] *= 100.0;
- j++;
+ for (i = 0; i < nnodes; i++) {
+ struct output_sum *os = &output_sums[j];
+ struct node *node = &nodes[i];
+ cur_vals += node->hits;
+ total_vals += node->hits;
+ os->nranges += node->hits;
+ if (i == (next_interval) -1 || i == nnodes - 1) {
+ os->output = (double) cur_vals / (double) nranges;
+ os->output *= 100.0;
cur_vals = 0;
- interval += (max_val + output_nranges - 1) / output_nranges;
- continue;
+ next_interval += interval_step;
+ j++;
}
- cur_vals++;
- }
- if (cur_vals) {
- output[j] = (double) (cur_vals + 1) / (double) nr_vals;
- output[j] *= 100.0;
- j++;
+ if (percentage) {
+ if (total_vals >= blocks) {
+ double cs = i * block_size / (1024 * 1024);
+ char p = 'M';
+
+ if (cs > 1024.0) {
+ cs /= 1024.0;
+ p = 'G';
+ }
+ if (cs > 1024.0) {
+ cs /= 1024.0;
+ p = 'T';
+ }
+
+ printf("%.2f%% of hits satisfied in %.3f%cB of cache\n", percentage, cs, p);
+ percentage = 0.0;
+ }
+ }
}
- perc_i = 100.0 / (double) output_nranges;
+ perc_i = 100.0 / (double)output_nranges;
perc = 0.0;
- for (i = 0; i < j; i++) {
- printf("%6.2f%% -> %6.2f%%:\t%6.2f%%\n", perc, perc + perc_i, output[i]);
+
+ printf("\n Rows Hits %% Sum %% # Hits Size\n");
+ printf("-----------------------------------------------------------------------\n");
+ for (i = 0; i < output_nranges; i++) {
+ struct output_sum *os = &output_sums[i];
+ double gb = (double)os->nranges * block_size / 1024.0;
+ char p = 'K';
+
+ if (gb > 1024.0) {
+ p = 'M';
+ gb /= 1024.0;
+ }
+ if (gb > 1024.0) {
+ p = 'G';
+ gb /= 1024.0;
+ }
+
perc += perc_i;
+ hit_percent_sum += os->output;
+ hit_sum += os->nranges;
+ printf("%s %6.2f%%\t%6.2f%%\t\t%6.2f%%\t\t%8u\t%6.2f%c\n",
+ i ? "|->" : "Top", perc, os->output, hit_percent_sum,
+ os->nranges, gb, p);
+ }
+
+ printf("-----------------------------------------------------------------------\n");
+ printf("Total\t\t\t\t\t\t%8llu\n", hit_sum);
+ free(output_sums);
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned long offset;
+ unsigned long long nranges;
+ unsigned long nnodes;
+ struct node *nodes;
+ struct zipf_state zs;
+ struct gauss_state gs;
+ int i, j;
+
+ if (parse_options(argc, argv))
+ return 1;
+
+ if (output_type != OUTPUT_CSV)
+ printf("Generating %s distribution with %f input and %lu GB size and %lu block_size.\n", dist_types[dist_type], dist_val, gb_size, block_size);
+
+ nranges = gb_size * 1024 * 1024 * 1024ULL;
+ nranges /= block_size;
+
+ if (dist_type == TYPE_ZIPF)
+ zipf_init(&zs, nranges, dist_val, 1);
+ else if (dist_type == TYPE_PARETO)
+ pareto_init(&zs, nranges, dist_val, 1);
+ else
+ gauss_init(&gs, nranges, dist_val, 1);
+
+ hash_bits = 0;
+ hash_size = nranges;
+ while ((hash_size >>= 1) != 0)
+ hash_bits++;
+
+ hash_size = 1 << hash_bits;
+
+ hash = malloc(hash_size * sizeof(struct flist_head));
+ for (i = 0; i < hash_size; i++)
+ INIT_FLIST_HEAD(&hash[i]);
+
+ nodes = malloc(nranges * sizeof(struct node));
+
+ for (i = j = 0; i < nranges; i++) {
+ struct node *n;
+
+ if (dist_type == TYPE_ZIPF)
+ offset = zipf_next(&zs);
+ else if (dist_type == TYPE_PARETO)
+ offset = pareto_next(&zs);
+ else
+ offset = gauss_next(&gs);
+
+ n = hash_lookup(offset);
+ if (n)
+ n->hits++;
+ else {
+ hash_insert(&nodes[j], offset);
+ j++;
+ }
+
}
- free(output);
- free(vals);
+ qsort(nodes, j, sizeof(struct node), node_cmp);
+ nnodes = j;
+
+ if (output_type == OUTPUT_CSV)
+ output_csv(nodes, nnodes);
+ else
+ output_normal(nodes, nnodes, nranges);
+
+ free(hash);
+ free(nodes);
return 0;
}
projects / fio.git / blobdiff