blob: b13f509ac943f02062db5e8411b2f0fd8f68c175 [file] [log] [blame]
/*
* Copyright (C) 2012 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
*
* Parts of this file were imported from Jens Axboe's blktrace sources (also GPL)
*/
#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 <getopt.h>
#include <limits.h>
#include <float.h>
#include <signal.h>
#include "plot.h"
#include "blkparse.h"
#include "list.h"
#include "tracers.h"
#include "mpstat.h"
#include "fio.h"
LIST_HEAD(all_traces);
LIST_HEAD(fio_traces);
static char line[1024];
static int line_len = 1024;
static int found_mpstat = 0;
static int make_movie = 0;
static int keep_movie_svgs = 0;
static int opt_graph_width = 0;
static int opt_graph_height = 0;
static int columns = 1;
static int num_xticks = 9;
static int num_yticks = 4;
static double min_time = 0;
static double max_time = DBL_MAX;
static unsigned long long min_mb = 0;
static unsigned long long max_mb = ULLONG_MAX >> 20;
int plot_io_action = 0;
int io_per_process = 0;
unsigned int longest_proc_name = 0;
/*
* this doesn't include the IO graph,
* but it counts the other graphs as they go out
*/
static int total_graphs_written = 1;
enum {
IO_GRAPH_INDEX = 0,
TPUT_GRAPH_INDEX,
FIO_GRAPH_INDEX,
CPU_SYS_GRAPH_INDEX,
CPU_IO_GRAPH_INDEX,
CPU_IRQ_GRAPH_INDEX,
CPU_SOFT_GRAPH_INDEX,
CPU_USER_GRAPH_INDEX,
LATENCY_GRAPH_INDEX,
QUEUE_DEPTH_GRAPH_INDEX,
IOPS_GRAPH_INDEX,
TOTAL_GRAPHS
};
enum {
MPSTAT_SYS = 0,
MPSTAT_IRQ,
MPSTAT_IO,
MPSTAT_SOFT,
MPSTAT_USER,
MPSTAT_GRAPHS
};
static char *graphs_by_name[] = {
"io",
"tput",
"fio",
"cpu-sys",
"cpu-io",
"cpu-irq",
"cpu-soft",
"cpu-user",
"latency",
"queue-depth",
"iops",
};
enum {
MOVIE_SPINDLE,
MOVIE_RECT,
NUM_MOVIE_STYLES,
};
char *movie_styles[] = {
"spindle",
"rect",
NULL
};
static int movie_style = 0;
static int lookup_movie_style(char *str)
{
int i;
for (i = 0; i < NUM_MOVIE_STYLES; i++) {
if (strcmp(str, movie_styles[i]) == 0)
return i;
}
return -1;
}
static int active_graphs[TOTAL_GRAPHS];
static int last_active_graph = IOPS_GRAPH_INDEX;
static int label_index = 0;
static int num_traces = 0;
static int num_fio_traces = 0;
static int longest_label = 0;
static char *graph_title = "";
static char *output_filename = "trace.svg";
static char *blktrace_devices[MAX_DEVICES_PER_TRACE];
static int num_blktrace_devices = 0;
static char *blktrace_outfile = "trace";
static char *blktrace_dest_dir = ".";
static char **prog_argv = NULL;
static int prog_argc = 0;
static char *ffmpeg_codec = "libx264";
static void alloc_mpstat_gld(struct trace_file *tf)
{
struct graph_line_data **ptr;
if (tf->trace->mpstat_num_cpus == 0)
return;
ptr = calloc((tf->trace->mpstat_num_cpus + 1) * MPSTAT_GRAPHS,
sizeof(struct graph_line_data *));
if (!ptr) {
perror("Unable to allocate mpstat arrays\n");
exit(1);
}
tf->mpstat_gld = ptr;
}
static void enable_all_graphs(void)
{
int i;
for (i = 0; i < TOTAL_GRAPHS; i++)
active_graphs[i] = 1;
}
static void disable_all_graphs(void)
{
int i;
for (i = 0; i < TOTAL_GRAPHS; i++)
active_graphs[i] = 0;
}
static int enable_one_graph(char *name)
{
int i;
for (i = 0; i < TOTAL_GRAPHS; i++) {
if (strcmp(name, graphs_by_name[i]) == 0) {
active_graphs[i] = 1;
return 0;
}
}
return -ENOENT;
}
static int disable_one_graph(char *name)
{
int i;
for (i = 0; i < TOTAL_GRAPHS; i++) {
if (strcmp(name, graphs_by_name[i]) == 0) {
active_graphs[i] = 0;
return 0;
}
}
return -ENOENT;
}
static int last_graph(void)
{
int i;
for (i = TOTAL_GRAPHS - 1; i >= 0; i--) {
if (active_graphs[i]) {
return i;
}
}
return -ENOENT;
}
static int graphs_left(int cur)
{
int i;
int left = 0;
for (i = cur; i < TOTAL_GRAPHS; i++) {
if (active_graphs[i])
left++;
}
return left;
}
static char * join_path(char *dest_dir, char *filename)
{
/* alloc 2 extra bytes for '/' and '\0' */
char *path = malloc(strlen(dest_dir) + strlen(filename) + 2);
sprintf(path, "%s%s%s", dest_dir, "/", filename);
return path;
}
static void add_trace_file(char *filename)
{
struct trace_file *tf;
tf = calloc(1, sizeof(*tf));
if (!tf) {
fprintf(stderr, "Unable to allocate memory\n");
exit(1);
}
tf->label = "";
tf->filename = strdup(filename);
list_add_tail(&tf->list, &all_traces);
tf->line_color = "black";
num_traces++;
}
static void add_fio_trace_file(char *filename)
{
struct trace_file *tf;
tf = calloc(1, sizeof(*tf));
if (!tf) {
fprintf(stderr, "Unable to allocate memory\n");
exit(1);
}
tf->label = "";
tf->filename = strdup(filename);
list_add_tail(&tf->list, &fio_traces);
tf->line_color = pick_fio_color();
tf->fio_trace = 1;
num_fio_traces++;
}
static void setup_trace_file_graphs(void)
{
struct trace_file *tf;
int i;
int alloc_ptrs;
if (io_per_process)
alloc_ptrs = 16;
else
alloc_ptrs = 1;
list_for_each_entry(tf, &all_traces, list) {
tf->tput_reads_gld = alloc_line_data(tf->min_seconds, tf->max_seconds, tf->stop_seconds);
tf->tput_writes_gld = alloc_line_data(tf->min_seconds, tf->max_seconds, tf->stop_seconds);
tf->latency_gld = alloc_line_data(tf->min_seconds, tf->max_seconds, tf->stop_seconds);
tf->queue_depth_gld = alloc_line_data(tf->min_seconds, tf->max_seconds, tf->stop_seconds);
tf->iop_gld = alloc_line_data(tf->min_seconds, tf->max_seconds, tf->stop_seconds);
tf->gdd_writes = calloc(alloc_ptrs, sizeof(struct graph_dot_data *));
tf->gdd_reads = calloc(alloc_ptrs, sizeof(struct graph_dot_data *));
tf->io_plots_allocated = alloc_ptrs;
if (tf->trace->mpstat_num_cpus == 0)
continue;
alloc_mpstat_gld(tf);
for (i = 0; i < (tf->trace->mpstat_num_cpus + 1) * MPSTAT_GRAPHS; i++) {
tf->mpstat_gld[i] =
alloc_line_data(tf->mpstat_min_seconds,
tf->mpstat_max_seconds,
tf->mpstat_max_seconds);
tf->mpstat_gld[i]->max = 100;
}
}
list_for_each_entry(tf, &fio_traces, list) {
if (tf->trace->fio_seconds > 0) {
tf->fio_gld = alloc_line_data(tf->min_seconds,
tf->max_seconds,
tf->stop_seconds);
}
}
}
static void read_traces(void)
{
struct trace_file *tf;
struct trace *trace;
u64 last_time;
u64 ymin;
u64 ymax;
u64 max_bank;
u64 max_bank_offset;
char *path = NULL;
list_for_each_entry(tf, &all_traces, list) {
path = join_path(blktrace_dest_dir, tf->filename);
trace = open_trace(path);
if (!trace)
exit(1);
last_time = find_last_time(trace);
tf->trace = trace;
tf->max_seconds = SECONDS(last_time) + 1;
tf->stop_seconds = SECONDS(last_time) + 1;
find_extreme_offsets(trace, &tf->min_offset, &tf->max_offset,
&max_bank, &max_bank_offset);
filter_outliers(trace, tf->min_offset, tf->max_offset, &ymin, &ymax);
tf->min_offset = ymin;
tf->max_offset = ymax;
read_mpstat(trace, path);
tf->mpstat_stop_seconds = trace->mpstat_seconds;
tf->mpstat_max_seconds = trace->mpstat_seconds;
if (tf->mpstat_max_seconds)
found_mpstat = 1;
free(path);
}
list_for_each_entry(tf, &fio_traces, list) {
trace = open_fio_trace(tf->filename);
if (!trace)
exit(1);
tf->trace = trace;
tf->max_seconds = tf->trace->fio_seconds;
tf->stop_seconds = tf->trace->fio_seconds;
}
}
static void pick_line_graph_color(void)
{
struct trace_file *tf;
int i;
list_for_each_entry(tf, &all_traces, list) {
for (i = 0; i < tf->io_plots; i++) {
if (tf->gdd_reads[i]) {
tf->line_color = tf->gdd_reads[i]->color;
tf->reads_color = tf->gdd_reads[i]->color;
}
if (tf->gdd_writes[i]) {
tf->line_color = tf->gdd_writes[i]->color;
tf->writes_color = tf->gdd_writes[i]->color;
}
if (tf->writes_color && tf->reads_color)
break;
}
if (!tf->reads_color)
tf->reads_color = tf->line_color;
if (!tf->writes_color)
tf->writes_color = tf->line_color;
}
}
static void read_fio_events(struct trace_file *tf)
{
u64 bw = 0;
int time = 0;
int dir = 0;
int ret;
first_fio(tf->trace);
while (1) {
ret = read_fio_event(tf->trace, &time, &bw, &dir);
if (ret)
break;
if (dir <= 1)
add_fio_gld(time, bw, tf->fio_gld);
if (next_fio_line(tf->trace))
break;
}
}
static void read_trace_events(void)
{
struct trace_file *tf;
struct trace *trace;
int ret;
int i;
unsigned int time;
double user, sys, iowait, irq, soft;
double max_user = 0, max_sys = 0, max_iowait = 0,
max_irq = 0, max_soft = 0;
list_for_each_entry(tf, &fio_traces, list)
read_fio_events(tf);
list_for_each_entry(tf, &all_traces, list) {
trace = tf->trace;
first_record(trace);
do {
if (SECONDS(get_record_time(trace)) > tf->max_seconds)
continue;
check_record(trace);
add_tput(trace, tf->tput_writes_gld, tf->tput_reads_gld);
add_iop(trace, tf->iop_gld);
add_io(trace, tf);
add_pending_io(trace, tf->queue_depth_gld);
add_completed_io(trace, tf->latency_gld);
} while (!(ret = next_record(trace)));
}
list_for_each_entry(tf, &all_traces, list) {
trace = tf->trace;
if (trace->mpstat_num_cpus == 0)
continue;
first_mpstat(trace);
for (time = 0; time < tf->mpstat_stop_seconds; time++) {
for (i = 0; i < (trace->mpstat_num_cpus + 1) * MPSTAT_GRAPHS; i += MPSTAT_GRAPHS) {
ret = read_mpstat_event(trace, &user, &sys,
&iowait, &irq, &soft);
if (ret)
goto mpstat_done;
if (next_mpstat_line(trace))
goto mpstat_done;
if (sys > max_sys)
max_sys = sys;
if (user > max_user)
max_user = user;
if (irq > max_irq)
max_irq = irq;
if (iowait > max_iowait)
max_iowait = iowait;
add_mpstat_gld(time, sys, tf->mpstat_gld[i + MPSTAT_SYS]);
add_mpstat_gld(time, irq, tf->mpstat_gld[i + MPSTAT_IRQ]);
add_mpstat_gld(time, soft, tf->mpstat_gld[i + MPSTAT_SOFT]);
add_mpstat_gld(time, user, tf->mpstat_gld[i + MPSTAT_USER]);
add_mpstat_gld(time, iowait, tf->mpstat_gld[i + MPSTAT_IO]);
}
if (next_mpstat(trace) == NULL)
break;
}
}
mpstat_done:
list_for_each_entry(tf, &all_traces, list) {
trace = tf->trace;
if (trace->mpstat_num_cpus == 0)
continue;
tf->mpstat_gld[MPSTAT_SYS]->max = max_sys;
tf->mpstat_gld[MPSTAT_IRQ]->max = max_irq;
tf->mpstat_gld[MPSTAT_SOFT]->max = max_soft;
tf->mpstat_gld[MPSTAT_USER]->max = max_user;
tf->mpstat_gld[MPSTAT_IO]->max = max_iowait;;
}
return;
}
static void set_trace_label(char *label)
{
int cur = 0;
struct trace_file *tf;
int len = strlen(label);
if (len > longest_label)
longest_label = len;
list_for_each_entry(tf, &all_traces, list) {
if (cur == label_index) {
tf->label = strdup(label);
label_index++;
return;
break;
}
cur++;
}
list_for_each_entry(tf, &fio_traces, list) {
if (cur == label_index) {
tf->label = strdup(label);
label_index++;
break;
}
cur++;
}
}
static void set_blktrace_outfile(char *arg)
{
char *s = strdup(arg);
char *last_dot = strrchr(s, '.');
if (last_dot) {
if (strcmp(last_dot, ".dump") == 0)
*last_dot = '\0';
}
blktrace_outfile = s;
}
static void compare_minmax_tf(struct trace_file *tf, unsigned int *max_seconds,
u64 *min_offset, u64 *max_offset)
{
if (tf->max_seconds > *max_seconds)
*max_seconds = tf->max_seconds;
if (tf->max_offset > *max_offset)
*max_offset = tf->max_offset;
if (tf->min_offset < *min_offset)
*min_offset = tf->min_offset;
}
static void set_all_minmax_tf(unsigned int min_seconds,
unsigned int max_seconds,
u64 min_offset, u64 max_offset)
{
struct trace_file *tf;
struct list_head *traces = &all_traces;
again:
list_for_each_entry(tf, traces, list) {
tf->min_seconds = min_seconds;
tf->max_seconds = max_seconds;
if (tf->stop_seconds > max_seconds)
tf->stop_seconds = max_seconds;
if (tf->mpstat_max_seconds) {
tf->mpstat_min_seconds = min_seconds;
tf->mpstat_max_seconds = max_seconds;
if (tf->mpstat_stop_seconds > max_seconds)
tf->mpstat_stop_seconds = max_seconds;
}
tf->min_offset = min_offset;
tf->max_offset = max_offset;
}
if (traces == &all_traces) {
traces = &fio_traces;
goto again;
}
}
static struct pid_plot_history *alloc_pid_plot_history(char *color)
{
struct pid_plot_history *pph;
pph = calloc(1, sizeof(struct pid_plot_history));
if (!pph) {
perror("memory allocation failed");
exit(1);
}
pph->history = malloc(sizeof(double) * 4096);
if (!pph->history) {
perror("memory allocation failed");
exit(1);
}
pph->history_len = 4096;
pph->color = color;
return pph;
}
static struct plot_history *alloc_plot_history(struct trace_file *tf)
{
struct plot_history *ph = calloc(1, sizeof(struct plot_history));
int i;
if (!ph) {
perror("memory allocation failed");
exit(1);
}
ph->read_pid_history = calloc(tf->io_plots, sizeof(struct pid_plot_history *));
if (!ph->read_pid_history) {
perror("memory allocation failed");
exit(1);
}
ph->write_pid_history = calloc(tf->io_plots, sizeof(struct pid_plot_history *));
if (!ph->write_pid_history) {
perror("memory allocation failed");
exit(1);
}
ph->pid_history_count = tf->io_plots;
for (i = 0; i < tf->io_plots; i++) {
if (tf->gdd_reads[i])
ph->read_pid_history[i] = alloc_pid_plot_history(tf->gdd_reads[i]->color);
if (tf->gdd_writes[i])
ph->write_pid_history[i] = alloc_pid_plot_history(tf->gdd_writes[i]->color);
}
return ph;
}
LIST_HEAD(movie_history);
int num_histories = 0;
static void free_plot_history(struct plot_history *ph)
{
int pid;
for (pid = 0; pid < ph->pid_history_count; pid++) {
if (ph->read_pid_history[pid])
free(ph->read_pid_history[pid]);
if (ph->write_pid_history[pid])
free(ph->write_pid_history[pid]);
}
free(ph->read_pid_history);
free(ph->write_pid_history);
free(ph);
}
static void add_history(struct plot_history *ph, struct list_head *list)
{
struct plot_history *entry;
list_add_tail(&ph->list, list);
num_histories++;
if (num_histories > 12) {
num_histories--;
entry = list_entry(list->next, struct plot_history, list);
list_del(&entry->list);
free_plot_history(entry);
}
}
static void plot_movie_history(struct plot *plot, struct list_head *list)
{
struct plot_history *ph;
int pid;
if (num_histories > 2)
rewind_spindle_steps(num_histories - 1);
list_for_each_entry(ph, list, list) {
for (pid = 0; pid < ph->pid_history_count; pid++) {
if (ph->read_pid_history[pid]) {
if (movie_style == MOVIE_SPINDLE) {
svg_io_graph_movie_array_spindle(plot,
ph->read_pid_history[pid]);
} else {
svg_io_graph_movie_array(plot,
ph->read_pid_history[pid]);
}
}
if (ph->write_pid_history[pid]) {
if (movie_style == MOVIE_SPINDLE) {
svg_io_graph_movie_array_spindle(plot,
ph->write_pid_history[pid]);
} else {
svg_io_graph_movie_array(plot,
ph->write_pid_history[pid]);
}
}
}
}
}
static void free_all_plot_history(struct list_head *head)
{
struct plot_history *entry;
while (!list_empty(head)) {
entry = list_entry(head->next, struct plot_history, list);
list_del(&entry->list);
free_plot_history(entry);
}
}
static int count_io_plot_types(void)
{
struct trace_file *tf;
int i;
int total_io_types = 0;
list_for_each_entry(tf, &all_traces, list) {
for (i = 0; i < tf->io_plots; i++) {
if (tf->gdd_reads[i])
total_io_types++;
if (tf->gdd_writes[i])
total_io_types++;
}
}
return total_io_types;
}
static void plot_io_legend(struct plot *plot, struct graph_dot_data *gdd, char *prefix, char *rw)
{
int ret = 0;
char *label = NULL;
if (io_per_process)
ret = asprintf(&label, "%s %s", prefix, gdd->label);
else
ret = asprintf(&label, "%s", prefix);
if (ret < 0) {
perror("Failed to process labels");
exit(1);
}
svg_add_legend(plot, label, rw, gdd->color);
free(label);
}
static void plot_io(struct plot *plot, unsigned int min_seconds,
unsigned int max_seconds, u64 min_offset, u64 max_offset)
{
struct trace_file *tf;
int i;
if (active_graphs[IO_GRAPH_INDEX] == 0)
return;
setup_axis(plot);
svg_alloc_legend(plot, count_io_plot_types() * 2);
set_plot_label(plot, "Device IO");
set_ylabel(plot, "Offset (MB)");
set_yticks(plot, num_yticks, min_offset / (1024 * 1024),
max_offset / (1024 * 1024), "");
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &all_traces, list) {
char *prefix = tf->label ? tf->label : "";
for (i = 0; i < tf->io_plots; i++) {
if (tf->gdd_writes[i]) {
svg_io_graph(plot, tf->gdd_writes[i]);
plot_io_legend(plot, tf->gdd_writes[i], prefix, " Writes");
}
if (tf->gdd_reads[i]) {
svg_io_graph(plot, tf->gdd_reads[i]);
plot_io_legend(plot, tf->gdd_reads[i], prefix, " Reads");
}
}
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
svg_write_legend(plot);
close_plot(plot);
}
static void plot_tput(struct plot *plot, unsigned int min_seconds,
unsigned int max_seconds, int with_legend)
{
struct trace_file *tf;
char *units;
char line[128];
u64 max = 0, val;
if (active_graphs[TPUT_GRAPH_INDEX] == 0)
return;
if (with_legend)
svg_alloc_legend(plot, num_traces * 2);
list_for_each_entry(tf, &all_traces, list) {
val = line_graph_roll_avg_max(tf->tput_writes_gld);
if (val > max)
max = val;
val = line_graph_roll_avg_max(tf->tput_reads_gld);
if (val > max)
max = val;
}
list_for_each_entry(tf, &all_traces, list) {
if (tf->tput_writes_gld->max > 0)
tf->tput_writes_gld->max = max;
if (tf->tput_reads_gld->max > 0)
tf->tput_reads_gld->max = max;
}
setup_axis(plot);
set_plot_label(plot, "Throughput");
tf = list_entry(all_traces.next, struct trace_file, list);
scale_line_graph_bytes(&max, &units, 1024);
sprintf(line, "%sB/s", units);
set_ylabel(plot, line);
set_yticks(plot, num_yticks, 0, max, "");
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &all_traces, list) {
if (tf->tput_writes_gld->max > 0) {
svg_line_graph(plot, tf->tput_writes_gld, tf->writes_color, 0, 0);
if (with_legend)
svg_add_legend(plot, tf->label, "Writes", tf->writes_color);
}
if (tf->tput_reads_gld->max > 0) {
svg_line_graph(plot, tf->tput_reads_gld, tf->reads_color, 0, 0);
if (with_legend)
svg_add_legend(plot, tf->label, "Reads", tf->reads_color);
}
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (with_legend)
svg_write_legend(plot);
close_plot(plot);
total_graphs_written++;
}
static void plot_fio_tput(struct plot *plot,
unsigned int min_seconds, unsigned int max_seconds)
{
struct trace_file *tf;
char *units;
char line[128];
u64 max = 0, val;
if (num_fio_traces == 0 || active_graphs[FIO_GRAPH_INDEX] == 0)
return;
if (num_fio_traces > 1)
svg_alloc_legend(plot, num_fio_traces);
list_for_each_entry(tf, &fio_traces, list) {
val = line_graph_roll_avg_max(tf->fio_gld);
if (val > max)
max = val;
}
list_for_each_entry(tf, &fio_traces, list) {
if (tf->fio_gld->max > 0)
tf->fio_gld->max = max;
}
setup_axis(plot);
set_plot_label(plot, "Fio Throughput");
tf = list_entry(all_traces.next, struct trace_file, list);
scale_line_graph_bytes(&max, &units, 1024);
sprintf(line, "%sB/s", units);
set_ylabel(plot, line);
set_yticks(plot, num_yticks, 0, max, "");
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &fio_traces, list) {
if (tf->fio_gld->max > 0) {
svg_line_graph(plot, tf->fio_gld, tf->line_color, 0, 0);
if (num_fio_traces > 1)
svg_add_legend(plot, tf->label, "", tf->line_color);
}
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (num_fio_traces > 1)
svg_write_legend(plot);
close_plot(plot);
total_graphs_written++;
}
static void plot_cpu(struct plot *plot, unsigned int max_seconds, char *label,
int active_index, int gld_index)
{
struct trace_file *tf;
int max = 0;
int i;
unsigned int gld_i;
char *color;
double avg = 0;
int ymax;
int plotted = 0;
if (active_graphs[active_index] == 0)
return;
list_for_each_entry(tf, &all_traces, list) {
if (tf->trace->mpstat_num_cpus > max)
max = tf->trace->mpstat_num_cpus;
}
if (max == 0)
return;
tf = list_entry(all_traces.next, struct trace_file, list);
ymax = tf->mpstat_gld[gld_index]->max;
if (ymax == 0)
return;
svg_alloc_legend(plot, num_traces * max);
setup_axis(plot);
set_plot_label(plot, label);
max_seconds = tf->mpstat_max_seconds;
set_yticks(plot, num_yticks, 0, tf->mpstat_gld[gld_index]->max, "");
set_ylabel(plot, "Percent");
set_xticks(plot, num_xticks, tf->mpstat_min_seconds, max_seconds);
reset_cpu_color();
list_for_each_entry(tf, &all_traces, list) {
if (tf->mpstat_gld == 0)
break;
for (gld_i = tf->mpstat_gld[0]->min_seconds;
gld_i < tf->mpstat_gld[0]->stop_seconds; gld_i++) {
if (tf->mpstat_gld[gld_index]->data[gld_i].count) {
avg += (tf->mpstat_gld[gld_index]->data[gld_i].sum /
tf->mpstat_gld[gld_index]->data[gld_i].count);
}
}
avg /= tf->mpstat_gld[gld_index]->stop_seconds -
tf->mpstat_gld[gld_index]->min_seconds;
color = pick_cpu_color();
svg_line_graph(plot, tf->mpstat_gld[0], color, 0, 0);
svg_add_legend(plot, tf->label, " avg", color);
for (i = 1; i < tf->trace->mpstat_num_cpus + 1; i++) {
struct graph_line_data *gld = tf->mpstat_gld[i * MPSTAT_GRAPHS + gld_index];
double this_avg = 0;
for (gld_i = gld->min_seconds;
gld_i < gld->stop_seconds; gld_i++) {
if (gld->data[i].count) {
this_avg += gld->data[i].sum /
gld->data[i].count;
}
}
this_avg /= gld->stop_seconds - gld->min_seconds;
for (gld_i = gld->min_seconds;
gld_i < gld->stop_seconds; gld_i++) {
double val;
if (gld->data[gld_i].count == 0)
continue;
val = (double)gld->data[gld_i].sum /
gld->data[gld_i].count;
if (this_avg > avg + 30 || val > 95) {
color = pick_cpu_color();
svg_line_graph(plot, gld, color, avg + 30, 95);
snprintf(line, line_len, " CPU %d\n", i - 1);
svg_add_legend(plot, tf->label, line, color);
plotted++;
break;
}
}
}
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (!plot->no_legend) {
svg_write_legend(plot);
svg_free_legend(plot);
}
close_plot(plot);
total_graphs_written++;
}
static void plot_queue_depth(struct plot *plot, unsigned int min_seconds,
unsigned int max_seconds)
{
struct trace_file *tf;
u64 max = 0, val;
if (active_graphs[QUEUE_DEPTH_GRAPH_INDEX] == 0)
return;
setup_axis(plot);
set_plot_label(plot, "Queue Depth");
if (num_traces > 1)
svg_alloc_legend(plot, num_traces);
list_for_each_entry(tf, &all_traces, list) {
val = line_graph_roll_avg_max(tf->queue_depth_gld);
if (val > max)
max = val;
}
list_for_each_entry(tf, &all_traces, list)
tf->queue_depth_gld->max = max;
set_ylabel(plot, "Pending IO");
set_yticks(plot, num_yticks, 0, max, "");
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &all_traces, list) {
svg_line_graph(plot, tf->queue_depth_gld, tf->line_color, 0, 0);
if (num_traces > 1)
svg_add_legend(plot, tf->label, "", tf->line_color);
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (num_traces > 1)
svg_write_legend(plot);
close_plot(plot);
total_graphs_written++;
}
static void system_check(const char *cmd)
{
if (system(cmd) < 0) {
int err = errno;
fprintf(stderr, "system exec failed (%d): %s\n", err, cmd);
exit(1);
}
}
static void convert_movie_files(char *movie_dir)
{
fprintf(stderr, "Converting svg files in %s\n", movie_dir);
snprintf(line, line_len, "find %s -name \\*.svg | xargs -I{} -n 1 -P 8 rsvg-convert -o {}.png {}",
movie_dir);
system_check(line);
}
static void mencode_movie(char *movie_dir)
{
fprintf(stderr, "Creating movie %s with ffmpeg\n", movie_dir);
snprintf(line, line_len, "ffmpeg -r 20 -y -i %s/%%10d-%s.svg.png -b:v 250k "
"-vcodec %s %s", movie_dir, output_filename, ffmpeg_codec,
output_filename);
system_check(line);
}
static void tencode_movie(char *movie_dir)
{
fprintf(stderr, "Creating movie %s with png2theora\n", movie_dir);
snprintf(line, line_len, "png2theora -o %s %s/%%010d-%s.svg.png",
output_filename, movie_dir, output_filename);
system_check(line);
}
static void encode_movie(char *movie_dir)
{
char *last_dot = strrchr(output_filename, '.');
if (last_dot &&
(!strncmp(last_dot, ".ogg", 4) || !strncmp(last_dot, ".ogv", 4))) {
tencode_movie(movie_dir);
} else
mencode_movie(movie_dir);
}
static void cleanup_movie(char *movie_dir)
{
if (keep_movie_svgs) {
fprintf(stderr, "Keeping movie dir %s\n", movie_dir);
return;
}
fprintf(stderr, "Removing movie dir %s\n", movie_dir);
snprintf(line, line_len, "rm %s/*", movie_dir);
system_check(line);
snprintf(line, line_len, "rmdir %s", movie_dir);
system_check(line);
}
static void plot_io_movie(struct plot *plot)
{
struct trace_file *tf;
int i, pid;
struct plot_history *history;
int batch_i;
int movie_len = 30;
int movie_frames_per_sec = 20;
int total_frames = movie_len * movie_frames_per_sec;
int rows, cols;
int batch_count;
int graph_width_factor = 5;
int orig_y_offset;
char movie_dir[] = "io-movie-XXXXXX";
if (mkdtemp(movie_dir) == NULL) {
perror("Unable to create temp directory for movie files");
exit(1);
}
get_graph_size(&cols, &rows);
batch_count = cols / total_frames;
if (batch_count == 0)
batch_count = 1;
list_for_each_entry(tf, &all_traces, list) {
char *prefix = tf->label ? tf->label : "";
i = 0;
while (i < cols) {
snprintf(line, line_len, "%s/%010d-%s.svg", movie_dir, i, output_filename);
set_plot_output(plot, line);
set_plot_title(plot, graph_title);
orig_y_offset = plot->start_y_offset;
plot->no_legend = 1;
set_graph_size(cols / graph_width_factor, rows / 8);
plot->timeline = i / graph_width_factor;
plot_tput(plot, tf->min_seconds, tf->max_seconds, 0);
plot_cpu(plot, tf->max_seconds,
"CPU System Time", CPU_SYS_GRAPH_INDEX, MPSTAT_SYS);
plot->direction = PLOT_ACROSS;
plot_queue_depth(plot, tf->min_seconds, tf->max_seconds);
/* movie graph starts here */
plot->start_y_offset = orig_y_offset;
set_graph_size(cols - cols / graph_width_factor, rows);
plot->no_legend = 0;
plot->timeline = 0;
plot->direction = PLOT_DOWN;;
if (movie_style == MOVIE_SPINDLE)
setup_axis_spindle(plot);
else
setup_axis(plot);
svg_alloc_legend(plot, count_io_plot_types() * 2);
history = alloc_plot_history(tf);
history->col = i;
for (pid = 0; pid < tf->io_plots; pid++) {
if (tf->gdd_reads[pid])
plot_io_legend(plot, tf->gdd_reads[pid], prefix, " Reads");
if (tf->gdd_writes[pid])
plot_io_legend(plot, tf->gdd_writes[pid], prefix, " Writes");
}
batch_i = 0;
while (i < cols && batch_i < batch_count) {
for (pid = 0; pid < tf->io_plots; pid++) {
if (tf->gdd_reads[pid]) {
svg_io_graph_movie(tf->gdd_reads[pid],
history->read_pid_history[pid],
i);
}
if (tf->gdd_writes[pid]) {
svg_io_graph_movie(tf->gdd_writes[pid],
history->write_pid_history[pid],
i);
}
}
i++;
batch_i++;
}
add_history(history, &movie_history);
plot_movie_history(plot, &movie_history);
svg_write_legend(plot);
close_plot(plot);
close_plot(plot);
close_plot_file(plot);
}
free_all_plot_history(&movie_history);
}
convert_movie_files(movie_dir);
encode_movie(movie_dir);
cleanup_movie(movie_dir);
}
static void plot_latency(struct plot *plot, unsigned int min_seconds,
unsigned int max_seconds)
{
struct trace_file *tf;
char *units;
char line[128];
u64 max = 0, val;
if (active_graphs[LATENCY_GRAPH_INDEX] == 0)
return;
if (num_traces > 1)
svg_alloc_legend(plot, num_traces);
list_for_each_entry(tf, &all_traces, list) {
val = line_graph_roll_avg_max(tf->latency_gld);
if (val > max)
max = val;
}
list_for_each_entry(tf, &all_traces, list)
tf->latency_gld->max = max;
setup_axis(plot);
set_plot_label(plot, "IO Latency");
tf = list_entry(all_traces.next, struct trace_file, list);
scale_line_graph_time(&max, &units);
sprintf(line, "latency (%ss)", units);
set_ylabel(plot, line);
set_yticks(plot, num_yticks, 0, max, "");
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &all_traces, list) {
svg_line_graph(plot, tf->latency_gld, tf->line_color, 0, 0);
if (num_traces > 1)
svg_add_legend(plot, tf->label, "", tf->line_color);
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (num_traces > 1)
svg_write_legend(plot);
close_plot(plot);
total_graphs_written++;
}
static void plot_iops(struct plot *plot, unsigned int min_seconds,
unsigned int max_seconds)
{
struct trace_file *tf;
char *units;
u64 max = 0, val;
if (active_graphs[IOPS_GRAPH_INDEX] == 0)
return;
list_for_each_entry(tf, &all_traces, list) {
val = line_graph_roll_avg_max(tf->iop_gld);
if (val > max)
max = val;
}
list_for_each_entry(tf, &all_traces, list)
tf->iop_gld->max = max;
setup_axis(plot);
set_plot_label(plot, "IOPs");
if (num_traces > 1)
svg_alloc_legend(plot, num_traces);
tf = list_entry(all_traces.next, struct trace_file, list);
scale_line_graph_bytes(&max, &units, 1000);
set_ylabel(plot, "IO/s");
set_yticks(plot, num_yticks, 0, max, units);
set_xticks(plot, num_xticks, min_seconds, max_seconds);
list_for_each_entry(tf, &all_traces, list) {
svg_line_graph(plot, tf->iop_gld, tf->line_color, 0, 0);
if (num_traces > 1)
svg_add_legend(plot, tf->label, "", tf->line_color);
}
if (plot->add_xlabel)
set_xlabel(plot, "Time (seconds)");
if (num_traces > 1)
svg_write_legend(plot);
close_plot(plot);
total_graphs_written++;
}
static void check_plot_columns(struct plot *plot, int index)
{
int count;
if (columns > 1 && (total_graphs_written == 0 ||
total_graphs_written % columns != 0)) {
count = graphs_left(index);
if (plot->direction == PLOT_DOWN) {
plot->start_x_offset = 0;
if (count <= columns)
plot->add_xlabel = 1;
}
plot->direction = PLOT_ACROSS;
} else {
plot->direction = PLOT_DOWN;
if (index == last_active_graph)
plot->add_xlabel = 1;
}
}
enum {
HELP_LONG_OPT = 1,
};
char *option_string = "+F:T:t:o:l:r:O:N:d:D:pm::h:w:c:x:y:a:C:PK";
static struct option long_options[] = {
{"columns", required_argument, 0, 'c'},
{"fio-trace", required_argument, 0, 'F'},
{"title", required_argument, 0, 'T'},
{"trace", required_argument, 0, 't'},
{"output", required_argument, 0, 'o'},
{"label", required_argument, 0, 'l'},
{"rolling", required_argument, 0, 'r'},
{"no-graph", required_argument, 0, 'N'},
{"only-graph", required_argument, 0, 'O'},
{"device", required_argument, 0, 'd'},
{"blktrace-destination", required_argument, 0, 'D'},
{"prog", no_argument, 0, 'p'},
{"movie", optional_argument, 0, 'm'},
{"codec", optional_argument, 0, 'C'},
{"keep-movie-svgs", no_argument, 0, 'K'},
{"width", required_argument, 0, 'w'},
{"height", required_argument, 0, 'h'},
{"xzoom", required_argument, 0, 'x'},
{"yzoom", required_argument, 0, 'y'},
{"io-plot-action", required_argument, 0, 'a'},
{"per-process-io", no_argument, 0, 'P'},
{"help", no_argument, 0, HELP_LONG_OPT},
{0, 0, 0, 0}
};
static void print_usage(void)
{
fprintf(stderr, "iowatcher usage:\n"
"\t-d (--device): device for blktrace to trace\n"
"\t-D (--blktrace-destination): destination for blktrace\n"
"\t-t (--trace): trace file name (more than one allowed)\n"
"\t-F (--fio-trace): fio bandwidth trace (more than one allowed)\n"
"\t-l (--label): trace label in the graph\n"
"\t-o (--output): output file name for the SVG image or video\n"
"\t-p (--prog): run a program while blktrace is run\n"
"\t-K (--keep-movie-svgs keep svgs generated for movie mode\n"
"\t-m (--movie [=spindle|rect]): create IO animations\n"
"\t-C (--codec): ffmpeg codec. Use ffmpeg -codecs to list\n"
"\t-r (--rolling): number of seconds in the rolling averge\n"
"\t-T (--title): graph title\n"
"\t-N (--no-graph): skip a single graph (io, tput, latency, queue_depth, \n"
"\t\t\tiops, cpu-sys, cpu-io, cpu-irq cpu-soft cpu-user)\n"
"\t-O (--only-graph): add a single graph to the output\n"
"\t-h (--height): set the height of each graph\n"
"\t-w (--width): set the width of each graph\n"
"\t-c (--columns): numbers of columns in graph output\n"
"\t-x (--xzoom): limit processed time to min:max\n"
"\t-y (--yzoom): limit processed sectors to min:max\n"
"\t-a (--io-plot-action): plot given action (one of Q,D,C) in IO graph\n"
"\t-P (--per-process-io): distinguish between processes in IO graph\n"
);
exit(1);
}
static int parse_double_range(char *str, double *min, double *max)
{
char *end;
/* Empty lower bound - leave original value */
if (str[0] != ':') {
*min = strtod(str, &end);
if (*min == HUGE_VAL || *min == -HUGE_VAL)
return -ERANGE;
if (*end != ':')
return -EINVAL;
} else
end = str;
/* Empty upper bound - leave original value */
if (end[1]) {
*max = strtod(end+1, &end);
if (*max == HUGE_VAL || *max == -HUGE_VAL)
return -ERANGE;
if (*end != 0)
return -EINVAL;
}
if (*min > *max)
return -EINVAL;
return 0;
}
static int parse_ull_range(char *str, unsigned long long *min,
unsigned long long *max)
{
char *end;
/* Empty lower bound - leave original value */
if (str[0] != ':') {
*min = strtoull(str, &end, 10);
if (*min == ULLONG_MAX && errno == ERANGE)
return -ERANGE;
if (*end != ':')
return -EINVAL;
} else
end = str;
/* Empty upper bound - leave original value */
if (end[1]) {
*max = strtoull(end+1, &end, 10);
if (*max == ULLONG_MAX && errno == ERANGE)
return -ERANGE;
if (*end != 0)
return -EINVAL;
}
if (*min > *max)
return -EINVAL;
return 0;
}
static int parse_options(int ac, char **av)
{
int c;
int disabled = 0;
int p_flagged = 0;
while (1) {
int option_index = 0;
c = getopt_long(ac, av, option_string,
long_options, &option_index);
if (c == -1)
break;
switch(c) {
case 'T':
graph_title = strdup(optarg);
break;
case 't':
add_trace_file(optarg);
set_blktrace_outfile(optarg);
break;
case 'F':
add_fio_trace_file(optarg);
break;
case 'o':
output_filename = strdup(optarg);
break;
case 'l':
set_trace_label(optarg);
break;
case 'r':
set_rolling_avg(atoi(optarg));
break;
case 'O':
if (!disabled) {
disable_all_graphs();
disabled = 1;
}
enable_one_graph(optarg);
break;
case 'N':
disable_one_graph(optarg);
break;
case 'd':
if (num_blktrace_devices == MAX_DEVICES_PER_TRACE - 1) {
fprintf(stderr, "Too many blktrace devices provided\n");
exit(1);
}
blktrace_devices[num_blktrace_devices++] = strdup(optarg);
break;
case 'D':
blktrace_dest_dir = strdup(optarg);
if (!strcmp(blktrace_dest_dir, "")) {
fprintf(stderr, "Need a directory\n");
print_usage();
}
break;
case 'p':
p_flagged = 1;
break;
case 'K':
keep_movie_svgs = 1;
break;
case 'm':
make_movie = 1;
if (optarg) {
movie_style = lookup_movie_style(optarg);
if (movie_style < 0) {
fprintf(stderr, "Unknown movie style %s\n", optarg);
print_usage();
}
}
fprintf(stderr, "Using movie style: %s\n",
movie_styles[movie_style]);
break;
case 'C':
ffmpeg_codec = strdup(optarg);
break;
case 'h':
opt_graph_height = atoi(optarg);
break;
case 'w':
opt_graph_width = atoi(optarg);
break;
case 'c':
columns = atoi(optarg);
break;
case 'x':
if (parse_double_range(optarg, &min_time, &max_time)
< 0) {
fprintf(stderr, "Cannot parse time range %s\n",
optarg);
exit(1);
}
break;
case 'y':
if (parse_ull_range(optarg, &min_mb, &max_mb)
< 0) {
fprintf(stderr,
"Cannot parse offset range %s\n",
optarg);
exit(1);
}
if (max_mb > ULLONG_MAX >> 20) {
fprintf(stderr,
"Upper range limit too big."
" Maximum is %llu.\n", ULLONG_MAX >> 20);
exit(1);
}
break;
case 'a':
if (strlen(optarg) != 1) {
action_err:
fprintf(stderr, "Action must be one of Q, D, C.");
exit(1);
}
plot_io_action = action_char_to_num(optarg[0]);
if (plot_io_action < 0)
goto action_err;
break;
case 'P':
io_per_process = 1;
break;
case '?':
case HELP_LONG_OPT:
print_usage();
break;
default:
break;
}
}
if (optind < ac && p_flagged) {
prog_argv = &av[optind];
prog_argc = ac - optind;
} else if (p_flagged) {
fprintf(stderr, "--prog or -p given but no program specified\n");
exit(1);
} else if (optind < ac) {
fprintf(stderr, "Extra arguments '%s'... (and --prog not specified)\n", av[optind]);
exit(1);
}
return 0;
}
static void dest_mkdir(char *dir)
{
int ret;
ret = mkdir(dir, 0777);
if (ret && errno != EEXIST) {
fprintf(stderr, "failed to mkdir error %s\n", strerror(errno));
exit(errno);
}
}
int main(int ac, char **av)
{
struct plot *plot;
unsigned int min_seconds = 0;
unsigned int max_seconds = 0;
u64 max_offset = 0;
u64 min_offset = ~(u64)0;
struct trace_file *tf;
int ret;
int rows, cols;
init_io_hash_table();
init_process_hash_table();
enable_all_graphs();
parse_options(ac, av);
last_active_graph = last_graph();
if (make_movie) {
set_io_graph_scale(256);
if (movie_style == MOVIE_SPINDLE)
set_graph_size(750, 550);
else
set_graph_size(700, 400);
/*
* the plots in the movie don't have a seconds
* line yet, this makes us skip it
*/
last_active_graph = TOTAL_GRAPHS + 1;
}
if (opt_graph_height)
set_graph_height(opt_graph_height);
if (opt_graph_width)
set_graph_width(opt_graph_width);
if (list_empty(&all_traces) && list_empty(&fio_traces)) {
fprintf(stderr, "No traces found, exiting\n");
exit(1);
}
if (num_blktrace_devices) {
char *path = join_path(blktrace_dest_dir, blktrace_outfile);
dest_mkdir(blktrace_dest_dir);
dest_mkdir(path);
snprintf(line, line_len, "%s.dump", path);
unlink(line);
ret = start_blktrace(blktrace_devices, num_blktrace_devices,
blktrace_outfile, blktrace_dest_dir);
if (ret) {
perror("Exiting due to blktrace failure");
exit(ret);
}
snprintf(line, line_len, "%s.mpstat", path);
ret = start_mpstat(line);
if (ret) {
perror("Exiting due to mpstat failure");
exit(ret);
}
if (prog_argv && prog_argc) {
run_program(prog_argc, prog_argv, 1, NULL, NULL);
wait_for_tracers(SIGINT);
} else {
printf("Tracing until interrupted...\n");
wait_for_tracers(0);
}
free(path);
}
/* step one, read all the traces */
read_traces();
/* step two, find the maxes for time and offset */
list_for_each_entry(tf, &all_traces, list)
compare_minmax_tf(tf, &max_seconds, &min_offset, &max_offset);
list_for_each_entry(tf, &fio_traces, list)
compare_minmax_tf(tf, &max_seconds, &min_offset, &max_offset);
min_seconds = min_time;
if (max_seconds > max_time)
max_seconds = ceil(max_time);
if (min_offset < min_mb << 20)
min_offset = min_mb << 20;
if (max_offset > max_mb << 20)
max_offset = max_mb << 20;
/* push the max we found into all the tfs */
set_all_minmax_tf(min_seconds, max_seconds, min_offset, max_offset);
/* alloc graphing structs for all the traces */
setup_trace_file_graphs();
/* run through all the traces and read their events */
read_trace_events();
pick_line_graph_color();
plot = alloc_plot();
if (make_movie) {
set_legend_width(longest_label + longest_proc_name + 1 + strlen("writes"));
plot_io_movie(plot);
exit(0);
}
set_plot_output(plot, output_filename);
if (active_graphs[IO_GRAPH_INDEX] || found_mpstat)
set_legend_width(longest_label + longest_proc_name + 1 + strlen("writes"));
else if (num_traces >= 1 || num_fio_traces >= 1)
set_legend_width(longest_label);
else
set_legend_width(0);
get_graph_size(&cols, &rows);
if (columns > 1)
plot->add_xlabel = 1;
set_plot_title(plot, graph_title);
check_plot_columns(plot, IO_GRAPH_INDEX);
plot_io(plot, min_seconds, max_seconds, min_offset, max_offset);
plot->add_xlabel = 0;
if (columns > 1) {
set_graph_size(cols / columns, rows);
num_xticks /= columns;
if (num_xticks < 2)
num_xticks = 2;
}
if (rows <= 50)
num_yticks--;
check_plot_columns(plot, TPUT_GRAPH_INDEX);
plot_tput(plot, min_seconds, max_seconds, 1);
check_plot_columns(plot, FIO_GRAPH_INDEX);
plot_fio_tput(plot, min_seconds, max_seconds);
check_plot_columns(plot, CPU_IO_GRAPH_INDEX);
plot_cpu(plot, max_seconds, "CPU IO Wait Time",
CPU_IO_GRAPH_INDEX, MPSTAT_IO);
check_plot_columns(plot, CPU_SYS_GRAPH_INDEX);
plot_cpu(plot, max_seconds, "CPU System Time",
CPU_SYS_GRAPH_INDEX, MPSTAT_SYS);
check_plot_columns(plot, CPU_IRQ_GRAPH_INDEX);
plot_cpu(plot, max_seconds, "CPU IRQ Time",
CPU_IRQ_GRAPH_INDEX, MPSTAT_IRQ);
check_plot_columns(plot, CPU_SOFT_GRAPH_INDEX);
plot_cpu(plot, max_seconds, "CPU SoftIRQ Time",
CPU_SOFT_GRAPH_INDEX, MPSTAT_SOFT);
check_plot_columns(plot, CPU_USER_GRAPH_INDEX);
plot_cpu(plot, max_seconds, "CPU User Time",
CPU_USER_GRAPH_INDEX, MPSTAT_USER);
check_plot_columns(plot, LATENCY_GRAPH_INDEX);
plot_latency(plot, min_seconds, max_seconds);
check_plot_columns(plot, QUEUE_DEPTH_GRAPH_INDEX);
plot_queue_depth(plot, min_seconds, max_seconds);
check_plot_columns(plot, IOPS_GRAPH_INDEX);
plot_iops(plot, min_seconds, max_seconds);
/* once for all */
close_plot(plot);
close_plot_file(plot);
return 0;
}