t/genzipf.c - platform/external/fio - Git at Google

 /*
  * Generate/analyze pareto/zipf distributions to better understand
  * 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
  * 20 buckets:
  *
  *	t/genzipf zipf 1.2 100000 20
  *
  * Only the distribution type (zipf or pareto) and spread input need
  * to be given, if not given defaults are used.
  *
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>

 #include "../lib/zipf.h"
 #include "../flist.h"
 #include "../hash.h"

 #define DEF_NR		1000000
 #define DEF_NR_OUTPUT	23

 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,
 };
 static const char *dist_types[] = { "None", "Zipf", "Pareto" };

 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_csv = 0;

 #define DEF_ZIPF_VAL	1.2
 #define DEF_PARETO_VAL	0.3

 static struct node *hash_lookup(unsigned long long val)
 {
 	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 NULL;
 }

 static struct node *hash_insert(struct node *n, unsigned long long val)
 {
 	struct flist_head *l = &hash[hash_long(val, hash_bits)];

 	n->val = val;
 	n->hits = 1;
 	flist_add_tail(&n->list, l);
 	return n;
 }

 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 or pareto)\n");
 	printf("\t-i\tDistribution algorithm input (zipf theta or pareto power)\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 columns\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 {
 				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_csv = 1;
 			break;
 		default:
 			printf("bad option %c\n", c);
 			return 1;
 		}
 	}

 	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;
 	}

 	return 0;
 }

 struct output_sum {
 	double output;
 	unsigned int nranges;
 };

 static int node_cmp(const void *p1, const void *p2)
 {
 	const struct node *n1 = p1;
 	const struct node *n2 = p2;

 	return n2->hits - n1->hits;
 }

 int main(int argc, char *argv[])
 {
 	unsigned long offset;
 	unsigned long i, j, k, nr_vals, cur_vals, interval, total_vals, nnodes;
 	unsigned long long nranges;
 	struct output_sum *output_sums;
 	struct node *nodes;
 	double perc, perc_i;
 	struct zipf_state zs;

 	if (parse_options(argc, argv))
 		return 1;

 	if( !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
 		pareto_init(&zs, 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 (nr_vals = i = j = 0; i < nranges; i++) {
 		struct node *n;

 		if (dist_type == TYPE_ZIPF)
 			offset = zipf_next(&zs);
 		else
 			offset = pareto_next(&zs);

 		n = hash_lookup(offset);
 		if (n)
 			n->hits++;
 		else {
 			hash_insert(&nodes[j], offset);
 			j++;
 		}

 		nr_vals++;
 	}

 	qsort(nodes, j, sizeof(struct node), node_cmp);
 	nnodes = j;
 	nr_vals = nnodes;

 	if (output_csv) {
 		printf("rank, count\n");
 		for (k = 0; k < nnodes; k++)
 			printf("%lu, %lu\n", k, nodes[k].hits);
 	} else {
 		interval = (nr_vals + output_nranges - 1) / output_nranges;

 		output_sums = malloc(output_nranges * sizeof(struct output_sum));
 		for (i = 0; i < output_nranges; i++) {
 			output_sums[i].output = 0.0;
 			output_sums[i].nranges = 1;
 		}

 		total_vals = i = j = cur_vals = 0;

 		for (k = 0; k < nnodes; k++) {
 			struct output_sum *os = &output_sums[j];
 			struct node *node = &nodes[k];

 			if (i >= interval) {
 				os->output =
 				    (double)(cur_vals + 1) / (double)nranges;
 				os->output *= 100.0;
 				j++;
 				cur_vals = node->hits;
 				interval +=
 				    (nr_vals + output_nranges -
 				     1) / output_nranges;
 			} else {
 				cur_vals += node->hits;
 				os->nranges += node->hits;
 			}

 			i++;
 			total_vals += node->hits;

 			if (percentage) {
 				unsigned long blocks =
 				    percentage * nranges / 100;

 				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 = 0.0;

 		printf("\n   Rows           Hits           No Hits         Size\n");
 		printf("--------------------------------------------------------\n");
 		for (i = 0; i < j; 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;
 			printf("%s %6.2f%%\t%6.2f%%\t\t%8u\t%6.2f%c\n",
 			       i ? "|->" : "Top", perc, os->output, os->nranges,
 			       gb, p);
 		}

 		free(output_sums);
 	}

 	free(hash);
 	free(nodes);
 	return 0;
 }
	/*
	* Generate/analyze pareto/zipf distributions to better understand
	* 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
	* 20 buckets:
	*
	* t/genzipf zipf 1.2 100000 20
	*
	* Only the distribution type (zipf or pareto) and spread input need
	* to be given, if not given defaults are used.
	*
	*/
	#include <stdio.h>
	#include <stdlib.h>
	#include <fcntl.h>
	#include <string.h>
	#include <unistd.h>

	#include "../lib/zipf.h"
	#include "../flist.h"
	#include "../hash.h"

	#define DEF_NR 1000000
	#define DEF_NR_OUTPUT 23

	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,
	};
	static const char *dist_types[] = { "None", "Zipf", "Pareto" };

	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_csv = 0;

	#define DEF_ZIPF_VAL 1.2
	#define DEF_PARETO_VAL 0.3

	static struct node *hash_lookup(unsigned long long val)
	{
	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 NULL;
	}

	static struct node hash_insert(struct node n, unsigned long long val)
	{
	struct flist_head *l = &hash[hash_long(val, hash_bits)];

	n->val = val;
	n->hits = 1;
	flist_add_tail(&n->list, l);
	return n;
	}

	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 or pareto)\n");
	printf("\t-i\tDistribution algorithm input (zipf theta or pareto power)\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 columns\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 {
	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_csv = 1;
	break;
	default:
	printf("bad option %c\n", c);
	return 1;
	}
	}

	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;
	}

	return 0;
	}

	struct output_sum {
	double output;
	unsigned int nranges;
	};

	static int node_cmp(const void p1, const void p2)
	{
	const struct node *n1 = p1;
	const struct node *n2 = p2;

	return n2->hits - n1->hits;
	}

	int main(int argc, char *argv[])
	{
	unsigned long offset;
	unsigned long i, j, k, nr_vals, cur_vals, interval, total_vals, nnodes;
	unsigned long long nranges;
	struct output_sum *output_sums;
	struct node *nodes;
	double perc, perc_i;
	struct zipf_state zs;

	if (parse_options(argc, argv))
	return 1;

	if( !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
	pareto_init(&zs, 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 (nr_vals = i = j = 0; i < nranges; i++) {
	struct node *n;

	if (dist_type == TYPE_ZIPF)
	offset = zipf_next(&zs);
	else
	offset = pareto_next(&zs);

	n = hash_lookup(offset);
	if (n)
	n->hits++;
	else {
	hash_insert(&nodes[j], offset);
	j++;
	}

	nr_vals++;
	}

	qsort(nodes, j, sizeof(struct node), node_cmp);
	nnodes = j;
	nr_vals = nnodes;

	if (output_csv) {
	printf("rank, count\n");
	for (k = 0; k < nnodes; k++)
	printf("%lu, %lu\n", k, nodes[k].hits);
	} else {
	interval = (nr_vals + output_nranges - 1) / output_nranges;

	output_sums = malloc(output_nranges * sizeof(struct output_sum));
	for (i = 0; i < output_nranges; i++) {
	output_sums[i].output = 0.0;
	output_sums[i].nranges = 1;
	}

	total_vals = i = j = cur_vals = 0;

	for (k = 0; k < nnodes; k++) {
	struct output_sum *os = &output_sums[j];
	struct node *node = &nodes[k];

	if (i >= interval) {
	os->output =
	(double)(cur_vals + 1) / (double)nranges;
	os->output *= 100.0;
	j++;
	cur_vals = node->hits;
	interval +=
	(nr_vals + output_nranges -
	1) / output_nranges;
	} else {
	cur_vals += node->hits;
	os->nranges += node->hits;
	}

	i++;
	total_vals += node->hits;

	if (percentage) {
	unsigned long blocks =
	percentage * nranges / 100;

	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 = 0.0;

	printf("\n Rows Hits No Hits Size\n");
	printf("--------------------------------------------------------\n");
	for (i = 0; i < j; 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;
	printf("%s %6.2f%%\t%6.2f%%\t\t%8u\t%6.2f%c\n",
	i ? "\|->" : "Top", perc, os->output, os->nranges,
	gb, p);
	}

	free(output_sums);
	}

	free(hash);
	free(nodes);
	return 0;
	}