[fio.git] / options.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <getopt.h>
#include <assert.h>

#include "fio.h"
#include "parse.h"
#include "fls.h"

#define td_var_offset(var)	((size_t) &((struct thread_options *)0)->var)

/*
 * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
 */
static char *get_opt_postfix(const char *str)
{
	char *p = strstr(str, ":");

	if (!p)
		return NULL;

	p++;
	strip_blank_front(&p);
	strip_blank_end(p);
	return strdup(p);
}

static int bs_cmp(const void *p1, const void *p2)
{
	const struct bssplit *bsp1 = p1;
	const struct bssplit *bsp2 = p2;

	return bsp1->perc < bsp2->perc;
}

static int str_bssplit_cb(void *data, const char *input)
{
	struct thread_data *td = data;
	char *fname, *str, *p;
	unsigned int i, perc, perc_missing;
	unsigned int max_bs, min_bs;
	long long val;

	p = str = strdup(input);

	strip_blank_front(&str);
	strip_blank_end(str);

	td->o.bssplit_nr = 4;
	td->o.bssplit = malloc(4 * sizeof(struct bssplit));

	i = 0;
	max_bs = 0;
	min_bs = -1;
	while ((fname = strsep(&str, ":")) != NULL) {
		char *perc_str;

		if (!strlen(fname))
			break;

		/*
		 * grow struct buffer, if needed
		 */
		if (i == td->o.bssplit_nr) {
			td->o.bssplit_nr <<= 1;
			td->o.bssplit = realloc(td->o.bssplit, td->o.bssplit_nr * sizeof(struct bssplit));
		}

		perc_str = strstr(fname, "/");
		if (perc_str) {
			*perc_str = '\0';
			perc_str++;
			perc = atoi(perc_str);
			if (perc > 100)
				perc = 100;
			else if (!perc)
				perc = -1;
		} else
			perc = -1;

		if (str_to_decimal(fname, &val, 1)) {
			log_err("fio: bssplit conversion failed\n");
			free(td->o.bssplit);
			return 1;
		}

		if (val > max_bs)
			max_bs = val;
		if (val < min_bs)
			min_bs = val;

		td->o.bssplit[i].bs = val;
		td->o.bssplit[i].perc = perc;
		i++;
	}

	td->o.bssplit_nr = i;

	/*
	 * Now check if the percentages add up, and how much is missing
	 */
	perc = perc_missing = 0;
	for (i = 0; i < td->o.bssplit_nr; i++) {
		struct bssplit *bsp = &td->o.bssplit[i];

		if (bsp->perc == (unsigned char) -1)
			perc_missing++;
		else
			perc += bsp->perc;
	}

	if (perc > 100) {
		log_err("fio: bssplit percentages add to more than 100%%\n");
		free(td->o.bssplit);
		return 1;
	}
	/*
	 * If values didn't have a percentage set, divide the remains between
	 * them.
	 */
	if (perc_missing) {
		for (i = 0; i < td->o.bssplit_nr; i++) {
			struct bssplit *bsp = &td->o.bssplit[i];

			if (bsp->perc == (unsigned char) -1)
				bsp->perc = (100 - perc) / perc_missing;
		}
	}

	td->o.min_bs[DDIR_READ] = td->o.min_bs[DDIR_WRITE] = min_bs;
	td->o.max_bs[DDIR_READ] = td->o.max_bs[DDIR_WRITE] = max_bs;

	/*
	 * now sort based on percentages, for ease of lookup
	 */
	qsort(td->o.bssplit, td->o.bssplit_nr, sizeof(struct bssplit), bs_cmp);

	free(p);
	return 0;
}

static int str_rw_cb(void *data, const char *str)
{
	struct thread_data *td = data;
	char *nr = get_opt_postfix(str);

	td->o.ddir_nr = 1;
	if (nr)
		td->o.ddir_nr = atoi(nr);

	return 0;
}

static int str_mem_cb(void *data, const char *mem)
{
	struct thread_data *td = data;

	if (td->o.mem_type == MEM_MMAPHUGE || td->o.mem_type == MEM_MMAP) {
		td->mmapfile = get_opt_postfix(mem);
		if (td->o.mem_type == MEM_MMAPHUGE && !td->mmapfile) {
			log_err("fio: mmaphuge:/path/to/file\n");
			return 1;
		}
	}

	return 0;
}

static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
{
	mlock_size = *val;
	return 0;
}

#ifdef FIO_HAVE_IOPRIO
static int str_prioclass_cb(void *data, unsigned int *val)
{
	struct thread_data *td = data;
	unsigned short mask;

	/*
	 * mask off old class bits, str_prio_cb() may have set a default class
	 */
	mask = (1 << IOPRIO_CLASS_SHIFT) - 1;
	td->ioprio &= mask;

	td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
	td->ioprio_set = 1;
	return 0;
}

static int str_prio_cb(void *data, unsigned int *val)
{
	struct thread_data *td = data;

	td->ioprio |= *val;

	/*
	 * If no class is set, assume BE
	 */
	if ((td->ioprio >> IOPRIO_CLASS_SHIFT) == 0)
		td->ioprio |= IOPRIO_CLASS_BE << IOPRIO_CLASS_SHIFT;

	td->ioprio_set = 1;
	return 0;
}
#endif

static int str_exitall_cb(void)
{
	exitall_on_terminate = 1;
	return 0;
}

#ifdef FIO_HAVE_CPU_AFFINITY
static int str_cpumask_cb(void *data, unsigned int *val)
{
	struct thread_data *td = data;
	unsigned int i;

	CPU_ZERO(&td->o.cpumask);

	for (i = 0; i < sizeof(int) * 8; i++)
		if ((1 << i) & *val)
			CPU_SET(*val, &td->o.cpumask);

	td->o.cpumask_set = 1;
	return 0;
}

static int str_cpus_allowed_cb(void *data, const char *input)
{
	struct thread_data *td = data;
	char *cpu, *str, *p;

	CPU_ZERO(&td->o.cpumask);

	p = str = strdup(input);

	strip_blank_front(&str);
	strip_blank_end(str);

	while ((cpu = strsep(&str, ",")) != NULL) {
		if (!strlen(cpu))
			break;
		CPU_SET(atoi(cpu), &td->o.cpumask);
	}

	free(p);
	td->o.cpumask_set = 1;
	exit(0);
	return 0;
}
#endif

static int str_fst_cb(void *data, const char *str)
{
	struct thread_data *td = data;
	char *nr = get_opt_postfix(str);

	td->file_service_nr = 1;
	if (nr)
		td->file_service_nr = atoi(nr);

	return 0;
}

static int str_filename_cb(void *data, const char *input)
{
	struct thread_data *td = data;
	char *fname, *str, *p;

	p = str = strdup(input);

	strip_blank_front(&str);
	strip_blank_end(str);

	if (!td->files_index)
		td->o.nr_files = 0;

	while ((fname = strsep(&str, ":")) != NULL) {
		if (!strlen(fname))
			break;
		add_file(td, fname);
		td->o.nr_files++;
	}

	free(p);
	return 0;
}

static int str_directory_cb(void *data, const char fio_unused *str)
{
	struct thread_data *td = data;
	struct stat sb;

	if (lstat(td->o.directory, &sb) < 0) {
		log_err("fio: %s is not a directory\n", td->o.directory);
		td_verror(td, errno, "lstat");
		return 1;
	}
	if (!S_ISDIR(sb.st_mode)) {
		log_err("fio: %s is not a directory\n", td->o.directory);
		return 1;
	}

	return 0;
}

static int str_opendir_cb(void *data, const char fio_unused *str)
{
	struct thread_data *td = data;

	if (!td->files_index)
		td->o.nr_files = 0;

	return add_dir_files(td, td->o.opendir);
}

static int str_verify_offset_cb(void *data, unsigned int *off)
{
	struct thread_data *td = data;

	if (*off && *off < sizeof(struct verify_header)) {
		log_err("fio: verify_offset too small\n");
		return 1;
	}

	td->o.verify_offset = *off;
	return 0;
}

static int str_verify_pattern_cb(void *data, unsigned int *off)
{
	struct thread_data *td = data;
	unsigned int msb;

	msb = fls(*off);
	if (msb <= 8)
		td->o.verify_pattern_bytes = 1;
	else if (msb <= 16)
		td->o.verify_pattern_bytes = 2;
	else if (msb <= 24)
		td->o.verify_pattern_bytes = 3;
	else
		td->o.verify_pattern_bytes = 4;

	td->o.verify_pattern = *off;
	return 0;
}

#define __stringify_1(x)	#x
#define __stringify(x)		__stringify_1(x)

/*
 * Map of job/command line options
 */
static struct fio_option options[] = {
	{
		.name	= "description",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(description),
		.help	= "Text job description",
	},
	{
		.name	= "name",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(name),
		.help	= "Name of this job",
	},
	{
		.name	= "directory",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(directory),
		.cb	= str_directory_cb,
		.help	= "Directory to store files in",
	},
	{
		.name	= "filename",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(filename),
		.cb	= str_filename_cb,
		.help	= "File(s) to use for the workload",
	},
	{
		.name	= "opendir",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(opendir),
		.cb	= str_opendir_cb,
		.help	= "Recursively add files from this directory and down",
	},
	{
		.name	= "rw",
		.alias	= "readwrite",
		.type	= FIO_OPT_STR,
		.cb	= str_rw_cb,
		.off1	= td_var_offset(td_ddir),
		.help	= "IO direction",
		.def	= "read",
		.posval = {
			  { .ival = "read",
			    .oval = TD_DDIR_READ,
			    .help = "Sequential read",
			  },
			  { .ival = "write",
			    .oval = TD_DDIR_WRITE,
			    .help = "Sequential write",
			  },
			  { .ival = "randread",
			    .oval = TD_DDIR_RANDREAD,
			    .help = "Random read",
			  },
			  { .ival = "randwrite",
			    .oval = TD_DDIR_RANDWRITE,
			    .help = "Random write",
			  },
			  { .ival = "rw",
			    .oval = TD_DDIR_RW,
			    .help = "Sequential read and write mix",
			  },
			  { .ival = "randrw",
			    .oval = TD_DDIR_RANDRW,
			    .help = "Random read and write mix"
			  },
		},
	},
	{
		.name	= "ioengine",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(ioengine),
		.help	= "IO engine to use",
		.def	= "sync",
		.posval	= {
			  { .ival = "sync",
			    .help = "Use read/write",
			  },
			  { .ival = "psync",
			    .help = "Use pread/pwrite",
			  },
			  { .ival = "vsync",
			     .help = "Use readv/writev",
			  },
#ifdef FIO_HAVE_LIBAIO
			  { .ival = "libaio",
			    .help = "Linux native asynchronous IO",
			  },
#endif
#ifdef FIO_HAVE_POSIXAIO
			  { .ival = "posixaio",
			    .help = "POSIX asynchronous IO",
			  },
#endif
			  { .ival = "mmap",
			    .help = "Memory mapped IO",
			  },
#ifdef FIO_HAVE_SPLICE
			  { .ival = "splice",
			    .help = "splice/vmsplice based IO",
			  },
			  { .ival = "netsplice",
			    .help = "splice/vmsplice to/from the network",
			  },
#endif
#ifdef FIO_HAVE_SGIO
			  { .ival = "sg",
			    .help = "SCSI generic v3 IO",
			  },
#endif
			  { .ival = "null",
			    .help = "Testing engine (no data transfer)",
			  },
			  { .ival = "net",
			    .help = "Network IO",
			  },
#ifdef FIO_HAVE_SYSLET
			  { .ival = "syslet-rw",
			    .help = "syslet enabled async pread/pwrite IO",
			  },
#endif
			  { .ival = "cpuio",
			    .help = "CPU cycler burner engine",
			  },
#ifdef FIO_HAVE_GUASI
			  { .ival = "guasi",
			    .help = "GUASI IO engine",
			  },
#endif
			  { .ival = "external",
			    .help = "Load external engine (append name)",
			  },
		},
	},
	{
		.name	= "iodepth",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(iodepth),
		.help	= "Amount of IO buffers to keep in flight",
		.minval = 1,
		.def	= "1",
	},
	{
		.name	= "iodepth_batch",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(iodepth_batch),
		.help	= "Number of IO to submit in one go",
		.parent	= "iodepth",
		.minval	= 1,
		.def	= "1",
	},
	{
		.name	= "iodepth_low",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(iodepth_low),
		.help	= "Low water mark for queuing depth",
		.parent	= "iodepth",
	},
	{
		.name	= "size",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(size),
		.minval = 1,
		.help	= "Total size of device or files",
	},
	{
		.name	= "fill_device",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(fill_device),
		.help	= "Write until an ENOSPC error occurs",
		.def	= "0",
	},
	{
		.name	= "filesize",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(file_size_low),
		.off2	= td_var_offset(file_size_high),
		.minval = 1,
		.help	= "Size of individual files",
	},
	{
		.name	= "offset",
		.alias	= "fileoffset",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(start_offset),
		.help	= "Start IO from this offset",
		.def	= "0",
	},
	{
		.name	= "bs",
		.alias	= "blocksize",
		.type	= FIO_OPT_STR_VAL_INT,
		.off1	= td_var_offset(bs[DDIR_READ]),
		.off2	= td_var_offset(bs[DDIR_WRITE]),
		.minval = 1,
		.help	= "Block size unit",
		.def	= "4k",
		.parent = "rw",
	},
	{
		.name	= "bsrange",
		.alias	= "blocksize_range",
		.type	= FIO_OPT_RANGE,
		.off1	= td_var_offset(min_bs[DDIR_READ]),
		.off2	= td_var_offset(max_bs[DDIR_READ]),
		.off3	= td_var_offset(min_bs[DDIR_WRITE]),
		.off4	= td_var_offset(max_bs[DDIR_WRITE]),
		.minval = 1,
		.help	= "Set block size range (in more detail than bs)",
		.parent = "rw",
	},
	{
		.name	= "bssplit",
		.type	= FIO_OPT_STR,
		.cb	= str_bssplit_cb,
		.help	= "Set a specific mix of block sizes",
		.parent	= "rw",
	},
	{
		.name	= "bs_unaligned",
		.alias	= "blocksize_unaligned",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(bs_unaligned),
		.help	= "Don't sector align IO buffer sizes",
		.parent = "rw",
	},
	{
		.name	= "randrepeat",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(rand_repeatable),
		.help	= "Use repeatable random IO pattern",
		.def	= "1",
		.parent = "rw",
	},
	{
		.name	= "norandommap",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(norandommap),
		.help	= "Accept potential duplicate random blocks",
		.parent = "rw",
	},
	{
		.name	= "nrfiles",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(nr_files),
		.help	= "Split job workload between this number of files",
		.def	= "1",
	},
	{
		.name	= "openfiles",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(open_files),
		.help	= "Number of files to keep open at the same time",
	},
	{
		.name	= "file_service_type",
		.type	= FIO_OPT_STR,
		.cb	= str_fst_cb,
		.off1	= td_var_offset(file_service_type),
		.help	= "How to select which file to service next",
		.def	= "roundrobin",
		.posval	= {
			  { .ival = "random",
			    .oval = FIO_FSERVICE_RANDOM,
			    .help = "Choose a file at random",
			  },
			  { .ival = "roundrobin",
			    .oval = FIO_FSERVICE_RR,
			    .help = "Round robin select files",
			  },
		},
		.parent = "nrfiles",
	},
	{
		.name	= "fadvise_hint",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(fadvise_hint),
		.help	= "Use fadvise() to advise the kernel on IO pattern",
		.def	= "1",
	},
	{
		.name	= "fsync",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(fsync_blocks),
		.help	= "Issue fsync for writes every given number of blocks",
		.def	= "0",
	},
	{
		.name	= "direct",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(odirect),
		.help	= "Use O_DIRECT IO (negates buffered)",
		.def	= "0",
	},
	{
		.name	= "buffered",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(odirect),
		.neg	= 1,
		.help	= "Use buffered IO (negates direct)",
		.def	= "1",
	},
	{
		.name	= "overwrite",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(overwrite),
		.help	= "When writing, set whether to overwrite current data",
		.def	= "0",
	},
	{
		.name	= "loops",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(loops),
		.help	= "Number of times to run the job",
		.def	= "1",
	},
	{
		.name	= "numjobs",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(numjobs),
		.help	= "Duplicate this job this many times",
		.def	= "1",
	},
	{
		.name	= "startdelay",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(start_delay),
		.help	= "Only start job when this period has passed",
		.def	= "0",
	},
	{
		.name	= "runtime",
		.alias	= "timeout",
		.type	= FIO_OPT_STR_VAL_TIME,
		.off1	= td_var_offset(timeout),
		.help	= "Stop workload when this amount of time has passed",
		.def	= "0",
	},
	{
		.name	= "time_based",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(time_based),
		.help	= "Keep running until runtime/timeout is met",
	},
	{
		.name	= "mem",
		.alias	= "iomem",
		.type	= FIO_OPT_STR,
		.cb	= str_mem_cb,
		.off1	= td_var_offset(mem_type),
		.help	= "Backing type for IO buffers",
		.def	= "malloc",
		.posval	= {
			  { .ival = "malloc",
			    .oval = MEM_MALLOC,
			    .help = "Use malloc(3) for IO buffers",
			  },
			  { .ival = "shm",
			    .oval = MEM_SHM,
			    .help = "Use shared memory segments for IO buffers",
			  },
#ifdef FIO_HAVE_HUGETLB
			  { .ival = "shmhuge",
			    .oval = MEM_SHMHUGE,
			    .help = "Like shm, but use huge pages",
			  },
#endif
			  { .ival = "mmap",
			    .oval = MEM_MMAP,
			    .help = "Use mmap(2) (file or anon) for IO buffers",
			  },
#ifdef FIO_HAVE_HUGETLB
			  { .ival = "mmaphuge",
			    .oval = MEM_MMAPHUGE,
			    .help = "Like mmap, but use huge pages",
			  },
#endif
		  },
	},
	{
		.name	= "verify",
		.type	= FIO_OPT_STR,
		.off1	= td_var_offset(verify),
		.help	= "Verify data written",
		.def	= "0",
		.posval = {
			  { .ival = "0",
			    .oval = VERIFY_NONE,
			    .help = "Don't do IO verification",
			  },
			  { .ival = "md5",
			    .oval = VERIFY_MD5,
			    .help = "Use md5 checksums for verification",
			  },
			  { .ival = "crc64",
			    .oval = VERIFY_CRC64,
			    .help = "Use crc64 checksums for verification",
			  },
			  { .ival = "crc32",
			    .oval = VERIFY_CRC32,
			    .help = "Use crc32 checksums for verification",
			  },
			  { .ival = "crc16",
			    .oval = VERIFY_CRC16,
			    .help = "Use crc16 checksums for verification",
			  },
			  { .ival = "crc7",
			    .oval = VERIFY_CRC7,
			    .help = "Use crc7 checksums for verification",
			  },
			  { .ival = "sha256",
			    .oval = VERIFY_SHA256,
			    .help = "Use sha256 checksums for verification",
			  },
			  { .ival = "sha512",
			    .oval = VERIFY_SHA512,
			    .help = "Use sha512 checksums for verification",
			  },
			  { .ival = "meta",
			    .oval = VERIFY_META,
			    .help = "Use io information",
			  },
			  {
			    .ival = "null",
			    .oval = VERIFY_NULL,
			    .help = "Pretend to verify",
			  },
		},
	},
	{
		.name	= "do_verify",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(do_verify),
		.help	= "Run verification stage after write",
		.def	= "1",
		.parent = "verify",
	},
	{
		.name	= "verifysort",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(verifysort),
		.help	= "Sort written verify blocks for read back",
		.def	= "1",
		.parent = "verify",
	},
	{
		.name   = "verify_interval",
		.type   = FIO_OPT_STR_VAL_INT,
		.off1   = td_var_offset(verify_interval),
		.minval	= 2 * sizeof(struct verify_header),
		.help   = "Store verify buffer header every N bytes",
		.parent	= "verify",
	},
	{
		.name	= "verify_offset",
		.type	= FIO_OPT_STR_VAL_INT,
		.help	= "Offset verify header location by N bytes",
		.def	= "0",
		.cb	= str_verify_offset_cb,	
		.parent	= "verify",
	},
	{
		.name	= "verify_pattern",
		.type	= FIO_OPT_INT,
		.cb	= str_verify_pattern_cb,
		.help	= "Fill pattern for IO buffers",
		.parent	= "verify",
	},
	{
		.name	= "verify_fatal",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(verify_fatal),
		.def	= "0",
		.help	= "Exit on a single verify failure, don't continue",
		.parent = "verify",
	},
	{
		.name	= "write_iolog",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(write_iolog_file),
		.help	= "Store IO pattern to file",
	},
	{
		.name	= "read_iolog",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(read_iolog_file),
		.help	= "Playback IO pattern from file",
	},
	{
		.name	= "exec_prerun",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(exec_prerun),
		.help	= "Execute this file prior to running job",
	},
	{
		.name	= "exec_postrun",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(exec_postrun),
		.help	= "Execute this file after running job",
	},
#ifdef FIO_HAVE_IOSCHED_SWITCH
	{
		.name	= "ioscheduler",
		.type	= FIO_OPT_STR_STORE,
		.off1	= td_var_offset(ioscheduler),
		.help	= "Use this IO scheduler on the backing device",
	},
#endif
	{
		.name	= "zonesize",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(zone_size),
		.help	= "Give size of an IO zone",
		.def	= "0",
	},
	{
		.name	= "zoneskip",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(zone_skip),
		.help	= "Space between IO zones",
		.def	= "0",
	},
	{
		.name	= "lockmem",
		.type	= FIO_OPT_STR_VAL,
		.cb	= str_lockmem_cb,
		.help	= "Lock down this amount of memory",
		.def	= "0",
	},
	{
		.name	= "rwmixread",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rwmix[DDIR_READ]),
		.maxval	= 100,
		.help	= "Percentage of mixed workload that is reads",
		.def	= "50",
	},
	{
		.name	= "rwmixwrite",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rwmix[DDIR_WRITE]),
		.maxval	= 100,
		.help	= "Percentage of mixed workload that is writes",
		.def	= "50",
	},
	{
		.name	= "rwmixcycle",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rwmixcycle),
		.help	= "Cycle period for mixed read/write workloads (msec)",
		.def	= "500",
		.parent	= "rwmixread",
	},
	{
		.name	= "nice",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(nice),
		.help	= "Set job CPU nice value",
		.minval	= -19,
		.maxval	= 20,
		.def	= "0",
	},
#ifdef FIO_HAVE_IOPRIO
	{
		.name	= "prio",
		.type	= FIO_OPT_INT,
		.cb	= str_prio_cb,
		.help	= "Set job IO priority value",
		.minval	= 0,
		.maxval	= 7,
	},
	{
		.name	= "prioclass",
		.type	= FIO_OPT_INT,
		.cb	= str_prioclass_cb,
		.help	= "Set job IO priority class",
		.minval	= 0,
		.maxval	= 3,
	},
#endif
	{
		.name	= "thinktime",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(thinktime),
		.help	= "Idle time between IO buffers (usec)",
		.def	= "0",
	},
	{
		.name	= "thinktime_spin",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(thinktime_spin),
		.help	= "Start think time by spinning this amount (usec)",
		.def	= "0",
		.parent	= "thinktime",
	},
	{
		.name	= "thinktime_blocks",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(thinktime_blocks),
		.help	= "IO buffer period between 'thinktime'",
		.def	= "1",
		.parent	= "thinktime",
	},
	{
		.name	= "rate",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rate),
		.help	= "Set bandwidth rate",
	},
	{
		.name	= "ratemin",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(ratemin),
		.help	= "Job must meet this rate or it will be shutdown",
		.parent	= "rate",
	},
	{
		.name	= "rate_iops",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rate_iops),
		.help	= "Limit IO used to this number of IO operations/sec",
	},
	{
		.name	= "rate_iops_min",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(rate_iops_min),
		.help	= "Job must meet this rate or it will be shutdown",
		.parent	= "rate_iops",
	},
	{
		.name	= "ratecycle",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(ratecycle),
		.help	= "Window average for rate limits (msec)",
		.def	= "1000",
		.parent = "rate",
	},
	{
		.name	= "invalidate",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(invalidate_cache),
		.help	= "Invalidate buffer/page cache prior to running job",
		.def	= "1",
	},
	{
		.name	= "sync",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(sync_io),
		.help	= "Use O_SYNC for buffered writes",
		.def	= "0",
		.parent = "buffered",
	},
	{
		.name	= "bwavgtime",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(bw_avg_time),
		.help	= "Time window over which to calculate bandwidth (msec)",
		.def	= "500",
	},
	{
		.name	= "create_serialize",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(create_serialize),
		.help	= "Serialize creating of job files",
		.def	= "1",
	},
	{
		.name	= "create_fsync",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(create_fsync),
		.help	= "Fsync file after creation",
		.def	= "1",
	},
	{
		.name	= "cpuload",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(cpuload),
		.help	= "Use this percentage of CPU",
	},
	{
		.name	= "cpuchunks",
		.type	= FIO_OPT_INT,
		.off1	= td_var_offset(cpucycle),
		.help	= "Length of the CPU burn cycles (usecs)",
		.def	= "50000",
		.parent = "cpuload",
	},
#ifdef FIO_HAVE_CPU_AFFINITY
	{
		.name	= "cpumask",
		.type	= FIO_OPT_INT,
		.cb	= str_cpumask_cb,
		.help	= "CPU affinity mask",
	},
	{
		.name	= "cpus_allowed",
		.type	= FIO_OPT_STR,
		.cb	= str_cpus_allowed_cb,
		.help	= "Set CPUs allowed",
	},
#endif
	{
		.name	= "end_fsync",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(end_fsync),
		.help	= "Include fsync at the end of job",
		.def	= "0",
	},
	{
		.name	= "fsync_on_close",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(fsync_on_close),
		.help	= "fsync files on close",
		.def	= "0",
	},
	{
		.name	= "unlink",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(unlink),
		.help	= "Unlink created files after job has completed",
		.def	= "0",
	},
	{
		.name	= "exitall",
		.type	= FIO_OPT_STR_SET,
		.cb	= str_exitall_cb,
		.help	= "Terminate all jobs when one exits",
	},
	{
		.name	= "stonewall",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(stonewall),
		.help	= "Insert a hard barrier between this job and previous",
	},
	{
		.name	= "new_group",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(new_group),
		.help	= "Mark the start of a new group (for reporting)",
	},
	{
		.name	= "thread",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(use_thread),
		.help	= "Use threads instead of forks",
	},
	{
		.name	= "write_bw_log",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(write_bw_log),
		.help	= "Write log of bandwidth during run",
	},
	{
		.name	= "write_lat_log",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(write_lat_log),
		.help	= "Write log of latency during run",
	},
	{
		.name	= "hugepage-size",
		.type	= FIO_OPT_STR_VAL,
		.off1	= td_var_offset(hugepage_size),
		.help	= "When using hugepages, specify size of each page",
		.def	= __stringify(FIO_HUGE_PAGE),
	},
	{
		.name	= "group_reporting",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(group_reporting),
		.help	= "Do reporting on a per-group basis",
	},
	{
		.name	= "zero_buffers",
		.type	= FIO_OPT_STR_SET,
		.off1	= td_var_offset(zero_buffers),
		.help	= "Init IO buffers to all zeroes",
	},
#ifdef FIO_HAVE_DISK_UTIL
	{
		.name	= "disk_util",
		.type	= FIO_OPT_BOOL,
		.off1	= td_var_offset(do_disk_util),
		.help	= "Log disk utilization stats",
		.def	= "1",
	},
#endif
	{
		.name = NULL,
	},
};

void fio_options_dup_and_init(struct option *long_options)
{
	struct fio_option *o;
	unsigned int i;

	options_init(options);

	i = 0;
	while (long_options[i].name)
		i++;

	o = &options[0];
	while (o->name) {
		long_options[i].name = o->name;
		long_options[i].val = FIO_GETOPT_JOB;
		if (o->type == FIO_OPT_STR_SET)
			long_options[i].has_arg = no_argument;
		else
			long_options[i].has_arg = required_argument;

		i++;
		o++;
		assert(i < FIO_NR_OPTIONS);
	}
}

int fio_option_parse(struct thread_data *td, const char *opt)
{
	return parse_option(opt, options, td);
}

int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
{
	return parse_cmd_option(opt, val, options, td);
}

void fio_fill_default_options(struct thread_data *td)
{
	fill_default_options(td, options);
}

int fio_show_option_help(const char *opt)
{
	return show_cmd_help(options, opt);
}

static void __options_mem(struct thread_data *td, int alloc)
{
	struct thread_options *o = &td->o;
	struct fio_option *opt;
	char **ptr;
	int i;

	for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
		if (opt->type != FIO_OPT_STR_STORE)
			continue;

		ptr = (void *) o + opt->off1;
		if (*ptr) {
			if (alloc)
				*ptr = strdup(*ptr);
			else {
				free(*ptr);
				*ptr = NULL;
			}
		}
	}
}

/*
 * dupe FIO_OPT_STR_STORE options
 */
void options_mem_dupe(struct thread_data *td)
{
	__options_mem(td, 1);
}

void options_mem_free(struct thread_data fio_unused *td)
{
#if 0
	__options_mem(td, 0);
#endif
}