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/*
* Copyright (C) 2013 Fusion-io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <inttypes.h>
#include <string.h>
#include <asm/types.h>
#include <errno.h>
#include <sys/mman.h>
#include <time.h>
#include <math.h>
#include "plot.h"
#include "blkparse.h"
#include "list.h"
#include "tracers.h"
#include "fio.h"
static int past_eof(struct trace *trace, char *cur)
{
if (cur >= trace->fio_start + trace->fio_len)
return 1;
return 0;
}
static int parse_fio_line(struct trace *trace, int *time, int *rate, int *dir, int *bs)
{
char *cur = trace->fio_cur;
char *p;
int *res[] = { time, rate, dir, bs, NULL };
int val;
int i = 0;
int *t;
char *end = index(cur, '\n');
char *tmp;
if (!end)
return 1;
tmp = strndup(cur, end - cur);
if (!tmp)
return 1;
p = strtok(tmp, ",");
while (p && *res) {
val = atoi(p);
t = res[i++];
*t = val;
p = strtok(NULL, ",");
}
free(tmp);
if (i < 3)
return 1;
return 0;
}
int next_fio_line(struct trace *trace)
{
char *next;
char *cur = trace->fio_cur;
next = strchr(cur, '\n');
if (!next)
return 1;
next++;
if (past_eof(trace, next))
return 1;
trace->fio_cur = next;
return 0;
}
char *first_fio(struct trace *trace)
{
trace->fio_cur = trace->fio_start;
return trace->fio_cur;
}
static void find_last_fio_time(struct trace *trace)
{
double d;
int time, rate, dir, bs;
int ret;
int last_time = 0;
if (trace->fio_len == 0)
return;
first_fio(trace);
while (1) {
ret = parse_fio_line(trace, &time, &rate, &dir, &bs);
if (ret)
break;
if (dir <= 1 && time > last_time)
last_time = time;
ret = next_fio_line(trace);
if (ret)
break;
}
d = (double)time / 1000;
trace->fio_seconds = ceil(d);
return;
}
static int read_fio(struct trace *trace, char *trace_name)
{
int fd;
struct stat st;
int ret;
char *p;
fd = open(trace_name, O_RDONLY);
if (fd < 0)
return 1;
ret = fstat(fd, &st);
if (ret < 0) {
fprintf(stderr, "stat failed on %s err %s\n",
trace_name, strerror(errno));
goto fail_fd;
}
p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (p == MAP_FAILED) {
fprintf(stderr, "Unable to mmap trace file %s, err %s\n",
trace_name, strerror(errno));
goto fail_fd;
}
trace->fio_start = p;
trace->fio_len = st.st_size;
trace->fio_cur = p;
trace->fio_fd = fd;
find_last_fio_time(trace);
first_fio(trace);
return 0;
fail_fd:
close(fd);
return 1;
}
struct trace *open_fio_trace(char *path)
{
int ret;
struct trace *trace;
trace = calloc(1, sizeof(*trace));
if (!trace) {
fprintf(stderr, "unable to allocate memory for trace\n");
exit(1);
}
ret = read_fio(trace, path);
if (ret) {
free(trace);
return NULL;
}
return trace;
}
int read_fio_event(struct trace *trace, int *time_ret, u64 *bw_ret, int *dir_ret)
{
char *cur = trace->fio_cur;
int time, rate, dir, bs;
int ret;
if (past_eof(trace, cur))
return 1;
ret = parse_fio_line(trace, &time, &rate, &dir, &bs);
if (ret)
return 1;
time = floor((double)time / 1000);
*time_ret = time;
*bw_ret = (u64)rate * 1024;
*dir_ret = dir;
return 0;
}
int add_fio_gld(unsigned int time, u64 bw, struct graph_line_data *gld)
{
double val;
if (time > gld->max_seconds)
return 0;
gld->data[time].sum += bw;
gld->data[time].count++;
val = ((double)gld->data[time].sum) / gld->data[time].count;
if (val > gld->max)
gld->max = ceil(val);
return 0;
}
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