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#include <stdio.h>
#include <stdlib.h>
#include "list.h"
#include "fio.h"
void write_iolog_put(struct thread_data *td, struct io_u *io_u)
{
fprintf(td->iolog_f, "%u,%llu,%u\n", io_u->ddir, io_u->offset, io_u->buflen);
}
int read_iolog_get(struct thread_data *td, struct io_u *io_u)
{
struct io_piece *ipo;
if (!list_empty(&td->io_log_list)) {
ipo = list_entry(td->io_log_list.next, struct io_piece, list);
list_del(&ipo->list);
io_u->offset = ipo->offset;
io_u->buflen = ipo->len;
io_u->ddir = ipo->ddir;
io_u->file = ipo->file;
free(ipo);
return 0;
}
return 1;
}
void prune_io_piece_log(struct thread_data *td)
{
struct io_piece *ipo;
while (!list_empty(&td->io_hist_list)) {
ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
list_del(&ipo->list);
free(ipo);
}
}
/*
* log a succesful write, so we can unwind the log for verify
*/
void log_io_piece(struct thread_data *td, struct io_u *io_u)
{
struct io_piece *ipo = malloc(sizeof(struct io_piece));
struct list_head *entry;
INIT_LIST_HEAD(&ipo->list);
ipo->file = io_u->file;
ipo->offset = io_u->offset;
ipo->len = io_u->buflen;
/*
* for random io where the writes extend the file, it will typically
* be laid out with the block scattered as written. it's faster to
* read them in in that order again, so don't sort
*/
if (td->sequential || !td->overwrite) {
list_add_tail(&ipo->list, &td->io_hist_list);
return;
}
/*
* for random io, sort the list so verify will run faster
*/
entry = &td->io_hist_list;
while ((entry = entry->prev) != &td->io_hist_list) {
struct io_piece *__ipo = list_entry(entry, struct io_piece, list);
if (__ipo->offset < ipo->offset)
break;
}
list_add(&ipo->list, entry);
}
void write_iolog_close(struct thread_data *td)
{
fflush(td->iolog_f);
fclose(td->iolog_f);
free(td->iolog_buf);
}
/*
* Open a stored log and read in the entries.
*/
static int init_iolog_read(struct thread_data *td)
{
unsigned long long offset;
unsigned int bytes;
char *str, *p;
FILE *f;
int rw, reads, writes;
f = fopen(td->read_iolog_file, "r");
if (!f) {
perror("fopen read iolog");
return 1;
}
/*
* Read in the read iolog and store it, reuse the infrastructure
* for doing verifications.
*/
str = malloc(4096);
reads = writes = 0;
while ((p = fgets(str, 4096, f)) != NULL) {
struct io_piece *ipo;
if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) {
log_err("bad iolog: %s\n", p);
continue;
}
if (rw == DDIR_READ)
reads++;
else if (rw == DDIR_WRITE)
writes++;
else {
log_err("bad ddir: %d\n", rw);
continue;
}
ipo = malloc(sizeof(*ipo));
INIT_LIST_HEAD(&ipo->list);
ipo->offset = offset;
ipo->len = bytes;
ipo->ddir = (enum fio_ddir) rw;
if (bytes > td->max_bs[rw])
td->max_bs[rw] = bytes;
list_add_tail(&ipo->list, &td->io_log_list);
}
free(str);
fclose(f);
if (!reads && !writes)
return 1;
else if (reads && !writes)
td->ddir = DDIR_READ;
else if (!reads && writes)
td->ddir = DDIR_READ;
else
td->iomix = 1;
return 0;
}
/*
* Setup a log for storing io patterns.
*/
static int init_iolog_write(struct thread_data *td)
{
FILE *f;
f = fopen(td->write_iolog_file, "w+");
if (!f) {
perror("fopen write iolog");
return 1;
}
/*
* That's it for writing, setup a log buffer and we're done.
*/
td->iolog_f = f;
td->iolog_buf = malloc(8192);
setvbuf(f, td->iolog_buf, _IOFBF, 8192);
return 0;
}
int init_iolog(struct thread_data *td)
{
int ret = 0;
if (td->io_ops->flags & FIO_CPUIO)
return 0;
if (td->read_iolog_file)
ret = init_iolog_read(td);
else if (td->write_iolog_file)
ret = init_iolog_write(td);
return ret;
}
int setup_rate(struct thread_data *td)
{
int nr_reads_per_sec;
if (!td->rate)
return 0;
if (td->rate < td->ratemin) {
log_err("min rate larger than nominal rate\n");
return -1;
}
nr_reads_per_sec = (td->rate * 1024) / td->min_bs[DDIR_READ];
td->rate_usec_cycle = 1000000 / nr_reads_per_sec;
td->rate_pending_usleep = 0;
return 0;
}
void setup_log(struct io_log **log)
{
struct io_log *l = malloc(sizeof(*l));
l->nr_samples = 0;
l->max_samples = 1024;
l->log = malloc(l->max_samples * sizeof(struct io_sample));
*log = l;
}
void finish_log(struct thread_data *td, struct io_log *log, const char *name)
{
char file_name[256];
FILE *f;
unsigned int i;
snprintf(file_name, 200, "client%d_%s.log", td->thread_number, name);
f = fopen(file_name, "w");
if (!f) {
perror("fopen log");
return;
}
for (i = 0; i < log->nr_samples; i++)
fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, log->log[i].ddir);
fclose(f);
free(log->log);
free(log);
}
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