/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
// measure the performance of insertions into multiple dictionaries using ENV->put_multiple
// the table schema is t(a bigint, b bigint, c bigint, d bigint, primary key(a), key(b), key(c,d), clustering key(d))
// the primary key(a) is represented with key=a and value=b,c,d
// the key(b) index is represented with key=b,a and no value
// the key(c,d) index is represented with key=c,d,a and no value
// the clustering key(d) is represented with key=d,a and value=b,c
// a is auto increment
// b, c and d are random

#include "../include/config.h"
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#if defined(HAVE_BYTESWAP_H)
# include <byteswap.h>
#elif defined(HAVE_LIBKERN_OSBYTEORDER_H)
# include <libkern/OSByteOrder.h>
# define bswap_64 OSSwapInt64
#endif
#include <arpa/inet.h>
#include "db.h"

static int force_multiple = 1;

struct table {
    int ndbs;
    DB **dbs;
#if defined(TOKUDB)
    DBT *mult_keys;
    DBT *mult_vals;
    uint32_t *mult_flags;
#endif
};

#if defined(TOKUDB)
static void table_init_dbt(DBT *dbt, size_t length) {
    dbt->flags = DB_DBT_USERMEM;
    dbt->data = malloc(length);
    dbt->ulen = length;
    dbt->size = 0;
}

static void table_destroy_dbt(DBT *dbt) {
    free(dbt->data);
}
#endif

static void table_init(struct table *t, int ndbs, DB **dbs, size_t key_length, size_t val_length) {
    t->ndbs = ndbs;
    t->dbs = dbs;
#if defined(TOKUDB)
    t->mult_keys = calloc(ndbs, sizeof (DBT));
    int i;
    for (i = 0; i < ndbs; i++) 
        table_init_dbt(&t->mult_keys[i], key_length);
    t->mult_vals = calloc(ndbs, sizeof (DBT));
    for (i = 0; i < ndbs; i++) 
        table_init_dbt(&t->mult_vals[i], val_length);
    t->mult_flags = calloc(ndbs, sizeof (uint32_t));
    for (i = 0; i < ndbs; i++) 
        t->mult_flags[i] = 0;
#endif
}

static void table_destroy(struct table *t) {
#if defined(TOKUDB)
    int i;
    for (i = 0; i < t->ndbs; i++)
        table_destroy_dbt(&t->mult_keys[i]);
    free(t->mult_keys);
    for (i = 0; i < t->ndbs; i++)
        table_destroy_dbt(&t->mult_vals[i]);
    free(t->mult_vals);
    free(t->mult_flags);
#endif
}

static int verbose = 0;

static long random64(void) {
    return ((long)random() << 32LL) + (long)random();
}

static long htonl64(long x) {
#if BYTE_ORDER == LITTLE_ENDIAN
    return bswap_64(x);
#else
#error
#endif
}

#if defined(TOKUDB)
static int my_generate_row_for_put(DB *dest_db, DB *src_db, DBT *dest_key, DBT *dest_val, const DBT *src_key, const DBT *src_val) {
    assert(dest_key->flags == DB_DBT_USERMEM && dest_key->ulen >= 4 * 8);
    assert(dest_val->flags == DB_DBT_USERMEM && dest_val->ulen >= 4 * 8);
    int index_num; 
    assert(dest_db->descriptor->dbt.size == sizeof index_num);
    memcpy(&index_num, dest_db->descriptor->dbt.data, sizeof index_num);
    switch (htonl(index_num) % 4) {
    case 0:
        // dest_key = src_key
        dest_key->size = src_key->size;
        memcpy(dest_key->data, src_key->data, src_key->size);
        // dest_val = src_val
        dest_val->size = src_val->size;
        memcpy(dest_val->data, src_val->data, src_val->size);
        break;
    case 1:
        // dest_key = b,a
        dest_key->size = 2 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 0, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_key->data + 0, 8);
        // dest_val = null
        dest_val->size = 0;
        break;
    case 2:
        // dest_key = c,d,a
        dest_key->size = 3 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 8, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_val->data + 16, 8);
        memcpy((char *)dest_key->data + 16, (char *)src_key->data + 0, 8);
        // dest_val = null
        dest_val->size = 0;
        break;
    case 3:
        // dest_key = d,a
        dest_key->size = 2 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 16, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_key->data + 0, 8);
        // dest_val = b,c
        dest_val->size = 2 * 8;
        memcpy((char *)dest_val->data + 0, (char *)src_val->data + 0, 8);
        memcpy((char *)dest_val->data + 8, (char *)src_val->data + 8, 8);
        break;
    default:
        assert(0);
    }
    return 0;
}

#else

static int my_secondary_key(DB *db, const DBT *src_key, const DBT *src_val, DBT *dest_key) {
    assert(dest_key->flags == 0 && dest_key->data == NULL);
    dest_key->flags = DB_DBT_APPMALLOC;
    dest_key->data = malloc(4 * 8); assert(dest_key->data);
    switch ((intptr_t)db->app_private % 4) {
    case 0:
        // dest_key = src_key
        dest_key->size = src_key->size;
        memcpy(dest_key->data, src_key->data, src_key->size);
        break;
    case 1:
        // dest_key = b,a
        dest_key->size = 2 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 0, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_key->data + 0, 8);
        break;
    case 2:
        // dest_key = c,d,a
        dest_key->size = 3 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 8, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_val->data + 16, 8);
        memcpy((char *)dest_key->data + 16, (char *)src_key->data + 0, 8);
        break;
    case 3:
        // dest_key = d,a,b,c
        dest_key->size = 4 * 8;
        memcpy((char *)dest_key->data + 0, (char *)src_val->data + 16, 8);
        memcpy((char *)dest_key->data + 8, (char *)src_key->data + 0, 8);
        memcpy((char *)dest_key->data + 16, (char *)src_val->data + 0, 8);
        memcpy((char *)dest_key->data + 24, (char *)src_val->data + 8, 8);
        break;
    default:
        assert(0);
    }
    return 0;
}
#endif

static void insert_row(DB_ENV *db_env, struct table *t, DB_TXN *txn, long a, long b, long c, long d) {
    int r;

    // generate the primary key
    char key_buffer[8];
    a = htonl64(a);
    memcpy(key_buffer, &a, sizeof a);

    // generate the primary value
    char val_buffer[3*8];
    b = htonl64(b);
    memcpy(val_buffer+0, &b, sizeof b);
    c = htonl64(c);
    memcpy(val_buffer+8, &c, sizeof c);
    d = htonl64(d);
    memcpy(val_buffer+16, &d, sizeof d);

    DBT key = { .data = key_buffer, .size = sizeof key_buffer };
    DBT value = { .data = val_buffer, .size = sizeof val_buffer };
#if defined(TOKUDB)
    if (!force_multiple && t->ndbs == 1) {
        r = t->dbs[0]->put(t->dbs[0], txn, &key, &value, t->mult_flags[0]); assert(r == 0);
    } else {
        r = db_env->put_multiple(db_env, t->dbs[0], txn, &key, &value, t->ndbs, &t->dbs[0], t->mult_keys, t->mult_vals, t->mult_flags); assert(r == 0);
    }
#else
    r = t->dbs[0]->put(t->dbs[0], txn, &key, &value, 0); assert(r == 0);
#endif
}

static inline float tdiff (struct timeval *a, struct timeval *b) {
    return (a->tv_sec - b->tv_sec) +1e-6*(a->tv_usec - b->tv_usec);
}

static void insert_all(DB_ENV *db_env, struct table *t, long nrows, long max_rows_per_txn, long key_range, long rows_per_report, bool do_txn) {
    int r;

    struct timeval tstart;
    r = gettimeofday(&tstart, NULL); assert(r == 0);
    struct timeval tlast = tstart;
    DB_TXN *txn = NULL;
    if (do_txn) {
        r = db_env->txn_begin(db_env, NULL, &txn, 0); assert(r == 0);
    }
    long n_rows_per_txn = 0;
    long rowi;
    for (rowi = 0; rowi < nrows; rowi++) {
        long a = rowi;
        long b = random64() % key_range;
        long c = random64() % key_range;
        long d = random64() % key_range;
        insert_row(db_env, t, txn, a, b, c, d);
        n_rows_per_txn++;
        
        // maybe commit
        if (do_txn && n_rows_per_txn == max_rows_per_txn) {
            r = txn->commit(txn, 0); assert(r == 0);
            r = db_env->txn_begin(db_env, NULL, &txn, 0); assert(r == 0);
            n_rows_per_txn = 0;
        }

        // maybe report performance
        if (((rowi + 1) % rows_per_report) == 0) {
            struct timeval tnow;
            r = gettimeofday(&tnow, NULL); assert(r == 0);
            float last_time = tdiff(&tnow, &tlast);
            float total_time = tdiff(&tnow, &tstart);
            printf("%ld %.3f %.0f/s %.0f/s\n", rowi + 1, last_time, rows_per_report/last_time, rowi/total_time); fflush(stdout);
            tlast = tnow;
        }
    }

    if (do_txn) {
        r = txn->commit(txn, 0); assert(r == 0);
    }
    struct timeval tnow;
    r = gettimeofday(&tnow, NULL); assert(r == 0);
    printf("total %ld %.3f %.0f/s\n", nrows, tdiff(&tnow, &tstart), nrows/tdiff(&tnow, &tstart)); fflush(stdout);
}

int main(int argc, char *argv[]) {
#if defined(TOKDUB)
    char *db_env_dir = "insertm.env.tokudb";
#else
    char *db_env_dir = "insertm.env.bdb";
#endif
    int db_env_open_flags = DB_CREATE | DB_PRIVATE | DB_INIT_MPOOL | DB_INIT_TXN | DB_INIT_LOCK | DB_INIT_LOG;
    long rows = 100000000;
    long rows_per_txn = 1000;
    long rows_per_report = 100000;
    long key_range = 100000;
    bool do_txn = true;
    u_int32_t pagesize = 0;
    u_int64_t cachesize = 0;
    int ndbs = 4;

    int i;
    for (i = 1; i < argc; i++) {
        char *arg = argv[i];
        if (strcmp(arg, "--verbose") == 0) {
            verbose++;
            continue;
        }
        if (strcmp(arg, "--ndbs") == 0 && i+1 < argc) {
            ndbs = atoi(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--rows") == 0 && i+1 < argc) {
            rows = atol(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--rows_per_txn") == 0 && i+1 < argc) {
            rows_per_txn = atol(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--rows_per_report") == 0 && i+1 < argc) {
            rows_per_report = atol(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--key_range") == 0 && i+1 < argc) {
            key_range = atol(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--txn") == 0 && i+1 < argc) {
            do_txn = atoi(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--pagesize") == 0 && i+1 < argc) {
            pagesize = atoi(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--cachesize") == 0 && i+1 < argc) {
            cachesize = atol(argv[++i]);
            continue;
        }
        if (strcmp(arg, "--force_multiple") == 0 && i+1 < argc) {
            force_multiple = atoi(argv[++i]);
            continue;
        }

        assert(0);
    }

    int r;
    char rm_cmd[strlen(db_env_dir) + strlen("rm -rf ") + 1];
    snprintf(rm_cmd, sizeof(rm_cmd), "rm -rf %s", db_env_dir);
    r = system(rm_cmd); assert(r == 0);

    r = mkdir(db_env_dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); assert(r == 0);

    // create and open the env
    DB_ENV *db_env = NULL;
    r = db_env_create(&db_env, 0); assert(r == 0);
    if (!do_txn)
        db_env_open_flags &= ~(DB_INIT_TXN | DB_INIT_LOG);
    if (cachesize) {
        const u_int64_t gig = 1 << 30;
        r = db_env->set_cachesize(db_env, cachesize / gig, cachesize % gig, 1); assert(r == 0);
    }
#if defined(TOKUDB)
    r = db_env->set_generate_row_callback_for_put(db_env, my_generate_row_for_put); assert(r == 0);
#endif
    r = db_env->open(db_env, db_env_dir, db_env_open_flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);

    // create the db
    DB *dbs[ndbs];
    for (i = 0; i < ndbs; i++) {
        DB *db = NULL;
        r = db_create(&db, db_env, 0); assert(r == 0);
        DB_TXN *create_txn = NULL;
        if (do_txn) {
            r = db_env->txn_begin(db_env, NULL, &create_txn, 0); assert(r == 0);
        }
        if (pagesize) {
            r = db->set_pagesize(db, pagesize); assert(r == 0);
        }
        char db_filename[32]; sprintf(db_filename, "test%d", i);
        r = db->open(db, create_txn, db_filename, NULL, DB_BTREE, DB_CREATE, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);

#if defined(TOKUDB)
        DESCRIPTOR_S new_descriptor;
        int index_num = htonl(i);
        new_descriptor.dbt.data = &index_num;
        new_descriptor.dbt.size = sizeof i;
        r = db->change_descriptor(db, create_txn, &new_descriptor.dbt, 0); assert(r == 0);
#else
        db->app_private = (void *) (intptr_t) i;
        if (i > 0) {
            r = dbs[0]->associate(dbs[0], create_txn, db, my_secondary_key, 0); assert(r == 0);
        }
#endif
        if (do_txn) {
            r = create_txn->commit(create_txn, 0); assert(r == 0);
        }
        dbs[i] = db;
    }

    // insert all rows
    struct table table;
    table_init(&table, ndbs, dbs, 4 * 8, 4 * 8);

    insert_all(db_env, &table, rows, rows_per_txn, key_range, rows_per_report, do_txn);

    table_destroy(&table);

    // shutdown
    for (i = 0; i < ndbs; i++) {
        DB *db = dbs[i];
        r = db->close(db, 0); assert(r == 0); db = NULL;
    }
    r = db_env->close(db_env, 0); assert(r == 0); db_env = NULL;

    return 0;
}
