/*      $NetBSD: perftest.c,v 1.5 2018/04/18 10:11:44 nonaka Exp $      */

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (C) 2012-2013 Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: perftest.c,v 1.5 2018/04/18 10:11:44 nonaka Exp $");
#if 0
__FBSDID("$FreeBSD: head/sbin/nvmecontrol/perftest.c 329824 2018-02-22 13:32:31Z wma $");
#endif
#endif

#include <sys/param.h>
#include <sys/ioccom.h>

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "nvmectl.h"

#ifdef PERFTEST_USAGE
static void
print_perftest(struct nvme_io_test *io_test, bool perthread)
{
        uint64_t        io_completed = 0, iops, mbps;
        uint32_t        i;

        for (i = 0; i < io_test->num_threads; i++)
                io_completed += io_test->io_completed[i];

        iops = io_completed/io_test->time;
        mbps = iops * io_test->size / (1024*1024);

        printf("Threads: %2d Size: %6d %5s Time: %3d IO/s: %7ju MB/s: %4ju\n",
            io_test->num_threads, io_test->size,
            io_test->opc == NVME_OPC_READ ? "READ" : "WRITE",
            io_test->time, (uintmax_t)iops, (uintmax_t)mbps);

        if (perthread)
                for (i = 0; i < io_test->num_threads; i++)
                        printf("\t%3d: %8ju IO/s\n", i,
                            (uintmax_t)io_test->io_completed[i]/io_test->time);
}

static void
perftest_usage(void)
{
        fprintf(stderr, "usage:\n");
        fprintf(stderr, "\t%s" PERFTEST_USAGE, getprogname());
        exit(1);
}

void
perftest(int argc, char *argv[])
{
        struct nvme_io_test             io_test;
        int                             fd;
        int                             ch;
        char                            *p;
        u_long                          ioctl_cmd = NVME_IO_TEST;
        bool                            nflag, oflag, sflag, tflag;
        int                             perthread = 0;

        nflag = oflag = sflag = tflag = false;

        memset(&io_test, 0, sizeof(io_test));

        while ((ch = getopt(argc, argv, "f:i:n:o:ps:t:")) != -1) {
                switch (ch) {
                case 'f':
                        if (!strcmp(optarg, "refthread"))
                                io_test.flags |= NVME_TEST_FLAG_REFTHREAD;
                        break;
                case 'i':
                        if (!strcmp(optarg, "bio") ||
                            !strcmp(optarg, "wait"))
                                ioctl_cmd = NVME_BIO_TEST;
                        else if (!strcmp(optarg, "io") ||
                                 !strcmp(optarg, "intr"))
                                ioctl_cmd = NVME_IO_TEST;
                        break;
                case 'n':
                        nflag = true;
                        io_test.num_threads = strtoul(optarg, &p, 0);
                        if (p != NULL && *p != '\0') {
                                fprintf(stderr,
                                    "\"%s\" not valid number of threads.\n",
                                    optarg);
                                perftest_usage();
                        } else if (io_test.num_threads == 0 ||
                                   io_test.num_threads > 128) {
                                fprintf(stderr,
                                    "\"%s\" not valid number of threads.\n",
                                    optarg);
                                perftest_usage();
                        }
                        break;
                case 'o':
                        oflag = true;
                        if (!strcmp(optarg, "read") || !strcmp(optarg, "READ"))
                                io_test.opc = NVME_OPC_READ;
                        else if (!strcmp(optarg, "write") ||
                                 !strcmp(optarg, "WRITE"))
                                io_test.opc = NVME_OPC_WRITE;
                        else {
                                fprintf(stderr, "\"%s\" not valid opcode.\n",
                                    optarg);
                                perftest_usage();
                        }
                        break;
                case 'p':
                        perthread = 1;
                        break;
                case 's':
                        sflag = true;
                        io_test.size = strtoul(optarg, &p, 0);
                        if (p == NULL || *p == '\0' || toupper(*p) == 'B') {
                                // do nothing
                        } else if (toupper(*p) == 'K') {
                                io_test.size *= 1024;
                        } else if (toupper(*p) == 'M') {
                                io_test.size *= 1024 * 1024;
                        } else {
                                fprintf(stderr, "\"%s\" not valid size.\n",
                                    optarg);
                                perftest_usage();
                        }
                        break;
                case 't':
                        tflag = true;
                        io_test.time = strtoul(optarg, &p, 0);
                        if (p != NULL && *p != '\0') {
                                fprintf(stderr,
                                    "\"%s\" not valid time duration.\n",
                                    optarg);
                                perftest_usage();
                        }
                        break;
                }
        }

        if (!nflag || !oflag || !sflag || !tflag || optind >= argc)
                perftest_usage();

        open_dev(argv[optind], &fd, 1, 1);
        if (ioctl(fd, ioctl_cmd, &io_test) < 0)
                err(1, "ioctl NVME_IO_TEST failed");

        close(fd);
        print_perftest(&io_test, perthread);
        exit(0);
}
#endif