1 /*
2 * Copyright (C) 2012 Fusion-io
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 *
17 * Parts of this file were imported from Jens Axboe's blktrace sources (also GPL)
18 */
19 #include <sys/types.h>
20 #include <sys/stat.h>
21 #include <fcntl.h>
22 #include <unistd.h>
23 #include <stdlib.h>
24 #include <stdio.h>
25 #include <math.h>
26 #include <inttypes.h>
27 #include <string.h>
28 #include <asm/types.h>
29 #include <errno.h>
30 #include <sys/mman.h>
31 #include <time.h>
32 #include <math.h>
33
34 #include "plot.h"
35
36 static int io_graph_scale = 8;
37 static int graph_width = 700;
38 static int graph_height = 250;
39 static int graph_circle_extra = 30;
40 static int graph_inner_x_margin = 2;
41 static int graph_inner_y_margin = 2;
42 static int graph_tick_len = 5;
43 static int graph_left_pad = 120;
44 static int tick_label_pad = 16;
45 static int tick_font_size = 15;
46 static char *font_family = "sans-serif";
47
48 /* this is the title for the whole page */
49 static int plot_title_height = 50;
50 static int plot_title_font_size = 25;
51
52 /* this is the label at the top of each plot */
53 static int plot_label_height = 60;
54 static int plot_label_font_size = 20;
55
56 /* label for each axis is slightly smaller */
57 static int axis_label_font_size = 16;
58
59 int legend_x_off = 45;
60 int legend_y_off = -10;
61 int legend_font_size = 15;
62 int legend_width = 80;
63
64 static int rolling_avg_secs = 0;
65
66 static int line_len = 1024;
67 static char line[1024];
68
69 static int final_height = 0;
70 static int final_width = 0;
71
72 static char *colors[] = {
73 "blue", "darkgreen",
74 "red",
75 "darkviolet",
76 "orange",
77 "aqua",
78 "brown", "#00FF00",
79 "yellow", "coral",
80 "black", "darkred",
81 "fuchsia", "crimson",
82 NULL };
83
84 extern unsigned int longest_proc_name;
85
pick_color(void)86 char *pick_color(void)
87 {
88 static int color_index;
89 char *ret = colors[color_index];
90
91 if (!ret) {
92 color_index = 0;
93 ret = colors[color_index];
94 }
95 color_index++;
96 return ret;
97 }
98
pick_fio_color(void)99 char *pick_fio_color(void)
100 {
101 static int fio_color_index;
102 char *ret = colors[fio_color_index];
103
104 if (!ret) {
105 fio_color_index = 0;
106 ret = colors[fio_color_index];
107 }
108 fio_color_index += 2;
109 return ret;
110 }
111
112 static int cpu_color_index;
113
pick_cpu_color(void)114 char *pick_cpu_color(void)
115 {
116 char *ret = colors[cpu_color_index];
117 if (!ret) {
118 cpu_color_index = 0;
119 ret = colors[cpu_color_index];
120 }
121 cpu_color_index++;
122 return ret;
123 }
124
reset_cpu_color(void)125 void reset_cpu_color(void)
126 {
127 cpu_color_index = 0;
128 }
129
alloc_line_data(unsigned int min_seconds,unsigned int max_seconds,unsigned int stop_seconds)130 struct graph_line_data *alloc_line_data(unsigned int min_seconds,
131 unsigned int max_seconds,
132 unsigned int stop_seconds)
133 {
134 int size = sizeof(struct graph_line_data) + (stop_seconds + 1) * sizeof(struct graph_line_pair);
135 struct graph_line_data *gld;
136
137 gld = calloc(1, size);
138 if (!gld) {
139 fprintf(stderr, "Unable to allocate memory for graph data\n");
140 exit(1);
141 }
142 gld->min_seconds = min_seconds;
143 gld->max_seconds = max_seconds;
144 gld->stop_seconds = stop_seconds;
145 return gld;
146 }
147
alloc_dot_data(unsigned int min_seconds,unsigned int max_seconds,u64 min_offset,u64 max_offset,unsigned int stop_seconds,char * color,char * label)148 struct graph_dot_data *alloc_dot_data(unsigned int min_seconds,
149 unsigned int max_seconds,
150 u64 min_offset, u64 max_offset,
151 unsigned int stop_seconds,
152 char *color, char *label)
153 {
154 int size;
155 int arr_size;
156 int rows = graph_height * io_graph_scale;
157 int cols = graph_width;
158 struct graph_dot_data *gdd;
159
160 size = sizeof(struct graph_dot_data);
161
162 /* the number of bits */
163 arr_size = (rows + 1) * cols;
164
165 /* the number of bytes */
166 arr_size = (arr_size + 7) / 8;
167
168 gdd = calloc(1, size + arr_size);
169 if (!gdd) {
170 fprintf(stderr, "Unable to allocate memory for graph data\n");
171 exit(1);
172 }
173 gdd->min_seconds = min_seconds;
174 gdd->max_seconds = max_seconds;
175 gdd->stop_seconds = stop_seconds;
176 gdd->rows = rows;
177 gdd->cols = cols;
178 gdd->min_offset = min_offset;
179 gdd->max_offset = max_offset;
180 gdd->color = color;
181 gdd->label = label;
182
183 if (strlen(label) > longest_proc_name)
184 longest_proc_name = strlen(label);
185
186 return gdd;
187 }
188
set_gdd_bit(struct graph_dot_data * gdd,u64 offset,double bytes,double time)189 void set_gdd_bit(struct graph_dot_data *gdd, u64 offset, double bytes, double time)
190 {
191 double bytes_per_row = (double)(gdd->max_offset - gdd->min_offset + 1) / gdd->rows;
192 double secs_per_col = (double)(gdd->max_seconds - gdd->min_seconds) / gdd->cols;
193 double col;
194 double row;
195 int col_int;
196 int row_int;
197 int bit_index;
198 int arr_index;
199 int bit_mod;
200 double mod = bytes_per_row;
201
202 if (offset > gdd->max_offset || offset < gdd->min_offset)
203 return;
204 time = time / 1000000000.0;
205 if (time < gdd->min_seconds || time > gdd->max_seconds)
206 return;
207 gdd->total_ios++;
208 while (bytes > 0 && offset <= gdd->max_offset) {
209 row = (double)(offset - gdd->min_offset) / bytes_per_row;
210 col = (time - gdd->min_seconds) / secs_per_col;
211
212 col_int = floor(col);
213 row_int = floor(row);
214 bit_index = row_int * gdd->cols + col_int;
215 arr_index = bit_index / 8;
216 bit_mod = bit_index % 8;
217
218 gdd->data[arr_index] |= 1 << bit_mod;
219 offset += mod;
220 bytes -= mod;
221 }
222 }
223
rolling_avg(struct graph_line_pair * data,int index,int distance)224 static double rolling_avg(struct graph_line_pair *data, int index, int distance)
225 {
226 double sum = 0;
227 int start;
228
229 if (distance < 0)
230 distance = 1;
231 if (distance > index) {
232 start = 0;
233 } else {
234 start = index - distance;
235 }
236 distance = 0;
237 while (start <= index) {
238 double avg;
239
240 if (data[start].count)
241 avg = ((double)data[start].sum) / data[start].count;
242 else
243 avg= 0;
244
245 sum += avg;
246 distance++;
247 start++;
248 }
249 return sum / distance;
250 }
251
write_check(int fd,char * buf,size_t size)252 static void write_check(int fd, char *buf, size_t size)
253 {
254 ssize_t ret;
255
256 ret = write(fd, buf, size);
257 if (ret != (ssize_t)size) {
258 if (ret < 0)
259 perror("write failed");
260 else
261 fprintf(stderr, "error: short write\n");
262 exit(1);
263 }
264 }
265
write_svg_header(int fd)266 void write_svg_header(int fd)
267 {
268 char *spaces = " \n";
269 char *header = "<svg xmlns=\"http://www.w3.org/2000/svg\">\n";
270 char *filter1 ="<filter id=\"shadow\">\n "
271 "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"4\" dy=\"4\" />\n "
272 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n "
273 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
274 "</filter>\n";
275 char *filter2 ="<filter id=\"textshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n "
276 "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"1\" dy=\"1\" />\n "
277 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"1.5\" />\n "
278 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
279 "</filter>\n";
280 char *filter3 ="<filter id=\"labelshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n "
281 "<feOffset result=\"offOut\" in=\"SourceGraphic\" dx=\"3\" dy=\"3\" />\n "
282 "<feColorMatrix result=\"matrixOut\" in=\"offOut\" type=\"matrix\" "
283 "values=\"0.2 0 0 0 0 0 0.2 0 0 0 0 0 0.2 0 0 0 0 0 1 0\" /> "
284 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n "
285 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
286 "</filter>\n";
287 char *defs_start = "<defs>\n";
288 char *defs_close = "</defs>\n";
289 final_width = 0;
290 final_height = 0;
291
292 write_check(fd, header, strlen(header));
293 /* write a bunch of spaces so we can stuff in the width and height later */
294 write_check(fd, spaces, strlen(spaces));
295 write_check(fd, spaces, strlen(spaces));
296 write_check(fd, spaces, strlen(spaces));
297
298 write_check(fd, defs_start, strlen(defs_start));
299 write_check(fd, filter1, strlen(filter1));
300 write_check(fd, filter2, strlen(filter2));
301 write_check(fd, filter3, strlen(filter3));
302 write_check(fd, defs_close, strlen(defs_close));
303 }
304
305 /* svg y offset for the traditional 0,0 (bottom left corner) of the plot */
axis_y(void)306 static int axis_y(void)
307 {
308 return plot_label_height + graph_height + graph_inner_y_margin;
309 }
310
311 /* this gives you the correct pixel for a given offset from the bottom left y axis */
axis_y_off_double(double y)312 static double axis_y_off_double(double y)
313 {
314 return plot_label_height + graph_height - y;
315 }
316
axis_y_off(int y)317 static int axis_y_off(int y)
318 {
319 return axis_y_off_double(y);
320 }
321
322 /* svg x axis offset from 0 */
axis_x(void)323 static int axis_x(void)
324 {
325 return graph_left_pad;
326 }
327
328 /* the correct pixel for a given X offset */
axis_x_off_double(double x)329 static double axis_x_off_double(double x)
330 {
331 return graph_left_pad + graph_inner_x_margin + x;
332 }
333
axis_x_off(int x)334 static int axis_x_off(int x)
335 {
336 return (int)axis_x_off_double(x);
337 }
338
339 /*
340 * this draws a backing rectangle for the plot and it
341 * also creates a new svg element so our offsets can
342 * be relative to this one plot.
343 */
setup_axis(struct plot * plot)344 void setup_axis(struct plot *plot)
345 {
346 int len;
347 int fd = plot->fd;
348 int bump_height = tick_font_size * 3 + axis_label_font_size;
349 int local_legend_width = legend_width;
350
351 if (plot->no_legend)
352 local_legend_width = 0;
353
354 plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + local_legend_width;
355 plot->total_height = axis_y() + tick_label_pad + tick_font_size;
356
357 if (plot->add_xlabel)
358 plot->total_height += bump_height;
359
360 /* backing rect */
361 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
362 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
363 plot->start_x_offset,
364 plot->start_y_offset, plot->total_width + 40,
365 plot->total_height + 20);
366 len = strlen(line);
367 write_check(fd, line, len);
368
369 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
370 "filter=\"url(#shadow)\" "
371 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
372 plot->start_x_offset + 15,
373 plot->start_y_offset, plot->total_width, plot->total_height);
374 len = strlen(line);
375 write_check(fd, line, len);
376 plot->total_height += 20;
377 plot->total_width += 20;
378
379 if (plot->total_height + plot->start_y_offset > final_height)
380 final_height = plot->total_height + plot->start_y_offset;
381 if (plot->start_x_offset + plot->total_width + 40 > final_width)
382 final_width = plot->start_x_offset + plot->total_width + 40;
383
384 /* create an svg object for all our coords to be relative against */
385 snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset);
386 write_check(fd, line, strlen(line));
387
388 snprintf(line, 1024, "<path d=\"M%d %d h %d V %d H %d Z\" stroke=\"black\" stroke-width=\"2\" fill=\"none\"/>\n",
389 axis_x(), axis_y(),
390 graph_width + graph_inner_x_margin * 2, axis_y_off(graph_height) - graph_inner_y_margin,
391 axis_x());
392 len = strlen(line);
393 write_check(fd, line, len);
394 }
395
396 /*
397 * this draws a backing rectangle for the plot and it
398 * also creates a new svg element so our offsets can
399 * be relative to this one plot.
400 */
setup_axis_spindle(struct plot * plot)401 void setup_axis_spindle(struct plot *plot)
402 {
403 int len;
404 int fd = plot->fd;
405 int bump_height = tick_font_size * 3 + axis_label_font_size;
406
407 legend_x_off = -60;
408
409 plot->total_width = axis_x_off(graph_width) + legend_width;
410 plot->total_height = axis_y() + tick_label_pad + tick_font_size;
411
412 if (plot->add_xlabel)
413 plot->total_height += bump_height;
414
415 /* backing rect */
416 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
417 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
418 plot->start_x_offset,
419 plot->start_y_offset, plot->total_width + 10,
420 plot->total_height + 20);
421 len = strlen(line);
422 write_check(fd, line, len);
423
424 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
425 "filter=\"url(#shadow)\" "
426 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
427 plot->start_x_offset + 15,
428 plot->start_y_offset, plot->total_width - 30,
429 plot->total_height);
430 len = strlen(line);
431 write_check(fd, line, len);
432 plot->total_height += 20;
433
434 if (plot->total_height + plot->start_y_offset > final_height)
435 final_height = plot->total_height + plot->start_y_offset;
436 if (plot->start_x_offset + plot->total_width + 40 > final_width)
437 final_width = plot->start_x_offset + plot->total_width + 40;
438
439 /* create an svg object for all our coords to be relative against */
440 snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset);
441 write_check(fd, line, strlen(line));
442
443 }
444
445 /* draw a plot title. This should be done only once,
446 * and it bumps the plot width/height numbers by
447 * what it draws.
448 *
449 * Call this before setting up the first axis
450 */
set_plot_title(struct plot * plot,char * title)451 void set_plot_title(struct plot *plot, char *title)
452 {
453 int len;
454 int fd = plot->fd;
455
456 plot->total_height = plot_title_height;
457 plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + legend_width;
458
459 /* backing rect */
460 snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"white\" stroke=\"none\"/>",
461 plot->start_y_offset, plot->total_width + 40, plot_title_height + 20);
462 len = strlen(line);
463 write_check(fd, line, len);
464
465 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
466 "font-weight=\"bold\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
467 axis_x_off(graph_width / 2),
468 plot->start_y_offset + plot_title_height / 2,
469 font_family, plot_title_font_size, "middle", title);
470 plot->start_y_offset += plot_title_height;
471 len = strlen(line);
472 write_check(fd, line, len);
473 }
474
475 #define TICK_MINI_STEPS 3
476
find_step(double first,double last,int num_ticks)477 static double find_step(double first, double last, int num_ticks)
478 {
479 int mini_step[TICK_MINI_STEPS] = { 1, 2, 5 };
480 int cur_mini_step = 0;
481 double step = (last - first) / num_ticks;
482 double log10 = log(10);
483
484 /* Round to power of 10 */
485 step = exp(floor(log(step) / log10) * log10);
486 /* Scale down step to provide enough ticks */
487 while (cur_mini_step < TICK_MINI_STEPS
488 && (last - first) / (step * mini_step[cur_mini_step]) > num_ticks)
489 cur_mini_step++;
490
491 if (cur_mini_step > 0)
492 step *= mini_step[cur_mini_step - 1];
493
494 return step;
495 }
496
497 /*
498 * create evenly spread out ticks along the xaxis. if tick only is set
499 * this just makes the ticks, otherwise it labels each tick as it goes
500 */
set_xticks(struct plot * plot,int num_ticks,int first,int last)501 void set_xticks(struct plot *plot, int num_ticks, int first, int last)
502 {
503 int pixels_per_tick;
504 double step;
505 int i;
506 int tick_y = axis_y_off(graph_tick_len) + graph_inner_y_margin;
507 int tick_x = axis_x();
508 int tick_only = plot->add_xlabel == 0;
509
510 int text_y = axis_y() + tick_label_pad;
511
512 char *middle = "middle";
513 char *start = "start";
514
515 step = find_step(first, last, num_ticks);
516 /*
517 * We don't want last two ticks to be too close together so subtract
518 * 20% of the step from the interval
519 */
520 num_ticks = (double)(last - first - step) / step + 1;
521 pixels_per_tick = graph_width * step / (double)(last - first);
522
523 for (i = 0; i < num_ticks; i++) {
524 char *anchor;
525 if (i != 0) {
526 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"2\" height=\"%d\" style=\"stroke:none;fill:black;\"/>\n",
527 tick_x, tick_y, graph_tick_len);
528 write_check(plot->fd, line, strlen(line));
529 anchor = middle;
530 } else {
531 anchor = start;
532 }
533
534 if (!tick_only) {
535 if (step >= 1)
536 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
537 "fill=\"black\" style=\"text-anchor: %s\">%d</text>\n",
538 tick_x, text_y, font_family, tick_font_size, anchor,
539 (int)(first + step * i));
540 else
541 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
542 "fill=\"black\" style=\"text-anchor: %s\">%.2f</text>\n",
543 tick_x, text_y, font_family, tick_font_size, anchor,
544 first + step * i);
545 write_check(plot->fd, line, strlen(line));
546 }
547 tick_x += pixels_per_tick;
548 }
549
550 if (!tick_only) {
551 if (step >= 1)
552 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
553 "fill=\"black\" style=\"text-anchor: middle\">%d</text>\n",
554 axis_x_off(graph_width - 2),
555 text_y, font_family, tick_font_size, last);
556 else
557 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
558 "fill=\"black\" style=\"text-anchor: middle\">%.2f</text>\n",
559 axis_x_off(graph_width - 2),
560 text_y, font_family, tick_font_size, (double)last);
561 write_check(plot->fd, line, strlen(line));
562 }
563 }
564
set_ylabel(struct plot * plot,char * label)565 void set_ylabel(struct plot *plot, char *label)
566 {
567 int len;
568 int fd = plot->fd;
569
570 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
571 "transform=\"rotate(-90 %d %d)\" font-weight=\"bold\" "
572 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
573 graph_left_pad / 2 - axis_label_font_size,
574 axis_y_off(graph_height / 2),
575 font_family,
576 graph_left_pad / 2 - axis_label_font_size,
577 (int)axis_y_off(graph_height / 2),
578 axis_label_font_size, "middle", label);
579 len = strlen(line);
580 write_check(fd, line, len);
581 }
582
set_xlabel(struct plot * plot,char * label)583 void set_xlabel(struct plot *plot, char *label)
584 {
585 int len;
586 int fd = plot->fd;
587 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
588 "font-weight=\"bold\" "
589 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
590 axis_x_off(graph_width / 2),
591 axis_y() + tick_font_size * 3 + axis_label_font_size / 2,
592 font_family,
593 axis_label_font_size, "middle", label);
594 len = strlen(line);
595 write_check(fd, line, len);
596
597 }
598
599 /*
600 * create evenly spread out ticks along the y axis.
601 * The ticks are labeled as it goes
602 */
set_yticks(struct plot * plot,int num_ticks,int first,int last,char * units)603 void set_yticks(struct plot *plot, int num_ticks, int first, int last, char *units)
604 {
605 int pixels_per_tick = graph_height / num_ticks;
606 int step = (last - first) / num_ticks;
607 int i;
608 int tick_y = 0;
609 int text_x = axis_x() - 6;
610 int tick_x = axis_x();
611 char *anchor = "end";
612
613 for (i = 0; i < num_ticks; i++) {
614 if (i != 0) {
615 snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
616 "style=\"stroke:lightgray;stroke-width:2;stroke-dasharray:9,12;\"/>\n",
617 tick_x, axis_y_off(tick_y),
618 axis_x_off(graph_width), axis_y_off(tick_y));
619 write_check(plot->fd, line, strlen(line));
620 }
621
622 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
623 "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n",
624 text_x,
625 axis_y_off(tick_y - tick_font_size / 2),
626 font_family, tick_font_size, anchor, first + step * i, units);
627 write_check(plot->fd, line, strlen(line));
628 tick_y += pixels_per_tick;
629 }
630 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
631 "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n",
632 text_x, axis_y_off(graph_height), font_family, tick_font_size, anchor, last, units);
633 write_check(plot->fd, line, strlen(line));
634 }
635
set_plot_label(struct plot * plot,char * label)636 void set_plot_label(struct plot *plot, char *label)
637 {
638 int len;
639 int fd = plot->fd;
640
641 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
642 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
643 axis_x() + graph_width / 2,
644 plot_label_height / 2,
645 font_family, plot_label_font_size, "middle", label);
646 len = strlen(line);
647 write_check(fd, line, len);
648 }
649
close_svg(int fd)650 static void close_svg(int fd)
651 {
652 char *close_line = "</svg>\n";
653
654 write_check(fd, close_line, strlen(close_line));
655 }
656
close_plot(struct plot * plot)657 int close_plot(struct plot *plot)
658 {
659 close_svg(plot->fd);
660 if (plot->direction == PLOT_DOWN)
661 plot->start_y_offset += plot->total_height;
662 else if (plot->direction == PLOT_ACROSS)
663 plot->start_x_offset += plot->total_width;
664 return 0;
665 }
666
alloc_plot(void)667 struct plot *alloc_plot(void)
668 {
669 struct plot *plot;
670 plot = calloc(1, sizeof(*plot));
671 if (!plot) {
672 fprintf(stderr, "Unable to allocate memory %s\n", strerror(errno));
673 exit(1);
674 }
675 plot->fd = 0;
676 return plot;
677 }
678
close_plot_file(struct plot * plot)679 int close_plot_file(struct plot *plot)
680 {
681 int ret;
682 ret = lseek(plot->fd, 0, SEEK_SET);
683 if (ret == (off_t)-1) {
684 perror("seek");
685 exit(1);
686 }
687 final_width = ((final_width + 1) / 2) * 2;
688 final_height = ((final_height + 1) / 2) * 2;
689 snprintf(line, line_len, "<svg xmlns=\"http://www.w3.org/2000/svg\" "
690 "width=\"%d\" height=\"%d\">\n",
691 final_width, final_height);
692 write_check(plot->fd, line, strlen(line));
693 snprintf(line, line_len, "<rect x=\"0\" y=\"0\" width=\"%d\" "
694 "height=\"%d\" fill=\"white\"/>\n", final_width, final_height);
695 write_check(plot->fd, line, strlen(line));
696 close(plot->fd);
697 plot->fd = 0;
698 return 0;
699 }
700
set_plot_output(struct plot * plot,char * filename)701 void set_plot_output(struct plot *plot, char *filename)
702 {
703 int fd;
704
705 if (plot->fd)
706 close_plot_file(plot);
707 fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
708 if (fd < 0) {
709 fprintf(stderr, "Unable to open output file %s err %s\n", filename, strerror(errno));
710 exit(1);
711 }
712 plot->fd = fd;
713 plot->start_y_offset = plot->start_x_offset = 0;
714 write_svg_header(fd);
715 }
716
717 char *byte_unit_names[] = { "", "K", "M", "G", "T", "P", "E", "Z", "Y", "unobtainium" };
718 int MAX_BYTE_UNIT_SCALE = 9;
719
720 char *time_unit_names[] = { "n", "u", "m", "s" };
721 int MAX_TIME_UNIT_SCALE = 3;
722
scale_line_graph_bytes(u64 * max,char ** units,u64 factor)723 void scale_line_graph_bytes(u64 *max, char **units, u64 factor)
724 {
725 int scale = 0;
726 u64 val = *max;
727 u64 div = 1;
728 while (val > factor * 64) {
729 val /= factor;
730 scale++;
731 div *= factor;
732 }
733 *units = byte_unit_names[scale];
734 if (scale == 0)
735 return;
736
737 if (scale > MAX_BYTE_UNIT_SCALE)
738 scale = MAX_BYTE_UNIT_SCALE;
739
740 *max /= div;
741 }
742
scale_line_graph_time(u64 * max,char ** units)743 void scale_line_graph_time(u64 *max, char **units)
744 {
745 int scale = 0;
746 u64 val = *max;
747 u64 div = 1;
748 while (val > 1000 * 10) {
749 val /= 1000;
750 scale++;
751 div *= 1000;
752 if (scale == MAX_TIME_UNIT_SCALE)
753 break;
754 }
755 *units = time_unit_names[scale];
756 if (scale == 0)
757 return;
758
759 *max /= div;
760 }
761
rolling_span(struct graph_line_data * gld)762 static int rolling_span(struct graph_line_data *gld)
763 {
764 if (rolling_avg_secs)
765 return rolling_avg_secs;
766 return (gld->stop_seconds - gld->min_seconds) / 25;
767 }
768
769
line_graph_roll_avg_max(struct graph_line_data * gld)770 double line_graph_roll_avg_max(struct graph_line_data *gld)
771 {
772 unsigned int i;
773 int rolling;
774 double avg, max = 0;
775
776 rolling = rolling_span(gld);
777 for (i = gld->min_seconds; i < gld->stop_seconds; i++) {
778 avg = rolling_avg(gld->data, i, rolling);
779 if (avg > max)
780 max = avg;
781 }
782 return max;
783 }
784
svg_line_graph(struct plot * plot,struct graph_line_data * gld,char * color,int thresh1,int thresh2)785 int svg_line_graph(struct plot *plot, struct graph_line_data *gld, char *color, int thresh1, int thresh2)
786 {
787 unsigned int i;
788 double val;
789 double avg;
790 int rolling;
791 int fd = plot->fd;
792 char *start = "<path d=\"";
793 double yscale = ((double)gld->max) / graph_height;
794 double xscale = (double)(gld->max_seconds - gld->min_seconds - 1) / graph_width;
795 char c = 'M';
796 double x;
797 int printed_header = 0;
798 int printed_lines = 0;
799
800 if (thresh1 && thresh2)
801 rolling = 0;
802 else
803 rolling = rolling_span(gld);
804
805 for (i = gld->min_seconds; i < gld->stop_seconds; i++) {
806 avg = rolling_avg(gld->data, i, rolling);
807 if (yscale == 0)
808 val = 0;
809 else
810 val = avg / yscale;
811
812 if (val > graph_height)
813 val = graph_height;
814 if (val < 0)
815 val = 0;
816
817 x = (double)(i - gld->min_seconds) / xscale;
818 if (!thresh1 && !thresh2) {
819 if (!printed_header) {
820 write_check(fd, start, strlen(start));
821 printed_header = 1;
822 }
823
824 /* in full line mode, everything in the graph is connected */
825 snprintf(line, line_len, "%c %d %d ", c, axis_x_off(x), axis_y_off(val));
826 c = 'L';
827 write_check(fd, line, strlen(line));
828 printed_lines = 1;
829 } else if (avg > thresh1 || avg > thresh2) {
830 int len = 10;
831 if (!printed_header) {
832 write_check(fd, start, strlen(start));
833 printed_header = 1;
834 }
835
836 /* otherwise, we just print a bar up there to show this one data point */
837 if (i >= gld->stop_seconds - 2)
838 len = -10;
839
840 /*
841 * we don't use the rolling averages here to show high
842 * points in the data
843 */
844 snprintf(line, line_len, "M %d %d h %d ", axis_x_off(x),
845 axis_y_off(val), len);
846 write_check(fd, line, strlen(line));
847 printed_lines = 1;
848 }
849
850 }
851 if (printed_lines) {
852 snprintf(line, line_len, "\" fill=\"none\" stroke=\"%s\" stroke-width=\"2\"/>\n", color);
853 write_check(fd, line, strlen(line));
854 }
855 if (plot->timeline)
856 svg_write_time_line(plot, plot->timeline);
857
858 return 0;
859 }
860
svg_write_time_line(struct plot * plot,int col)861 void svg_write_time_line(struct plot *plot, int col)
862 {
863 snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
864 "style=\"stroke:black;stroke-width:2;\"/>\n",
865 axis_x_off(col), axis_y_off(0),
866 axis_x_off(col), axis_y_off(graph_height));
867 write_check(plot->fd, line, strlen(line));
868 }
869
svg_add_io(int fd,double row,double col,double width,double height,char * color)870 static void svg_add_io(int fd, double row, double col, double width, double height, char *color)
871 {
872 float rx = 0;
873
874 snprintf(line, line_len, "<rect x=\"%.2f\" y=\"%.2f\" width=\"%.1f\" height=\"%.1f\" "
875 "rx=\"%.2f\" style=\"stroke:none;fill:%s;stroke-width:0\"/>\n",
876 axis_x_off_double(col), axis_y_off_double(row), width, height, rx, color);
877 write_check(fd, line, strlen(line));
878 }
879
svg_io_graph_movie_array(struct plot * plot,struct pid_plot_history * pph)880 int svg_io_graph_movie_array(struct plot *plot, struct pid_plot_history *pph)
881 {
882 double cell_index;
883 double movie_row;
884 double movie_col;
885 int i;
886
887 for (i = 0; i < pph->num_used; i++) {
888 cell_index = pph->history[i];
889 movie_row = floor(cell_index / graph_width);
890 movie_col = cell_index - movie_row * graph_width;
891 svg_add_io(plot->fd, movie_row, movie_col, 4, 4, pph->color);
892 }
893 return 0;
894 }
895
896 static float spindle_steps = 0;
897
rewind_spindle_steps(int num)898 void rewind_spindle_steps(int num)
899 {
900 spindle_steps -= num * 0.01;
901 }
902
svg_io_graph_movie_array_spindle(struct plot * plot,struct pid_plot_history * pph)903 int svg_io_graph_movie_array_spindle(struct plot *plot, struct pid_plot_history *pph)
904 {
905 double cell_index;
906 int i;
907 int num_circles = 0;
908 double cells_per_circle;
909 double circle_num;
910 double degrees_per_cell;
911 double rot;
912 double center_x;
913 double center_y;
914 double graph_width_extra = graph_width + graph_circle_extra;
915 double graph_height_extra = graph_height + graph_circle_extra;
916 double radius;;
917
918 if (graph_width_extra > graph_height_extra)
919 graph_width_extra = graph_height_extra;
920
921 if (graph_width_extra < graph_height_extra)
922 graph_height_extra = graph_width_extra;
923
924 radius = graph_width_extra;
925
926 center_x = axis_x_off_double(graph_width_extra / 2);
927 center_y = axis_y_off_double(graph_height_extra / 2);
928
929 snprintf(line, line_len, "<g transform=\"rotate(%.4f, %.2f, %.2f)\"> "
930 "<circle cx=\"%.2f\" cy=\"%.2f\" "
931 "stroke=\"black\" stroke-width=\"6\" "
932 "r=\"%.2f\" fill=\"none\"/>\n",
933 spindle_steps * 1.2, center_x, center_y, center_x, center_y, graph_width_extra / 2);
934 write_check(plot->fd, line, strlen(line));
935 snprintf(line, line_len, "<circle cx=\"%.2f\" cy=\"%.2f\" "
936 "stroke=\"none\" fill=\"red\" r=\"%.2f\"/>\n</g>\n",
937 axis_x_off_double(graph_width_extra), center_y, 4.5);
938 write_check(plot->fd, line, strlen(line));
939 spindle_steps += 0.01;
940
941 radius = floor(radius / 2);
942 num_circles = radius / 4 - 3;
943 cells_per_circle = pph->history_max / num_circles;
944 degrees_per_cell = 360 / cells_per_circle;
945
946 for (i = 0; i < pph->num_used; i++) {
947 cell_index = pph->history[i];
948 circle_num = floor(cell_index / cells_per_circle);
949 rot = cell_index - circle_num * cells_per_circle;
950 circle_num = num_circles - circle_num;
951 radius = circle_num * 4;
952
953 rot = rot * degrees_per_cell;
954 rot -= spindle_steps;
955 snprintf(line, line_len, "<path transform=\"rotate(%.4f, %.2f, %.2f)\" "
956 "d=\"M %.2f %.2f a %.2f %.2f 0 0 1 0 5\" "
957 "stroke=\"%s\" stroke-width=\"4\"/>\n",
958 -rot, center_x, center_y,
959 axis_x_off_double(graph_width_extra / 2 + radius) + 8, center_y,
960 radius, radius, pph->color);
961
962 write_check(plot->fd, line, strlen(line));
963 }
964 return 0;
965 }
966
add_plot_history(struct pid_plot_history * pph,double val)967 static int add_plot_history(struct pid_plot_history *pph, double val)
968 {
969 if (pph->num_used == pph->history_len) {
970 pph->history_len += 4096;
971 pph->history = realloc(pph->history,
972 pph->history_len * sizeof(double));
973 if (!pph->history) {
974 perror("Unable to allocate memory");
975 exit(1);
976 }
977 }
978 pph->history[pph->num_used++] = val;
979 return 0;
980 }
981
svg_io_graph_movie(struct graph_dot_data * gdd,struct pid_plot_history * pph,int col)982 int svg_io_graph_movie(struct graph_dot_data *gdd, struct pid_plot_history *pph, int col)
983 {
984 int row = 0;
985 int arr_index;
986 unsigned char val;
987 int bit_index;
988 int bit_mod;
989 double blocks_per_row = (gdd->max_offset - gdd->min_offset + 1) / gdd->rows;
990 double movie_blocks_per_cell = (gdd->max_offset - gdd->min_offset + 1) / (graph_width * graph_height);
991 double cell_index;
992 int margin_orig = graph_inner_y_margin;
993
994 graph_inner_y_margin += 5;
995 pph->history_max = (gdd->max_offset - gdd->min_offset + 1) / movie_blocks_per_cell;
996
997 for (row = gdd->rows - 1; row >= 0; row--) {
998 bit_index = row * gdd->cols + col;
999 arr_index = bit_index / 8;
1000 bit_mod = bit_index % 8;
1001
1002 if (arr_index < 0)
1003 continue;
1004 val = gdd->data[arr_index];
1005 if (val & (1 << bit_mod)) {
1006 /* in bytes, linear offset from the start of the drive */
1007 cell_index = (double)row * blocks_per_row;
1008
1009 /* a cell number in the graph */
1010 cell_index /= movie_blocks_per_cell;
1011
1012 add_plot_history(pph, cell_index);
1013 }
1014 }
1015 graph_inner_y_margin = margin_orig;
1016 return 0;
1017 }
1018
svg_io_graph(struct plot * plot,struct graph_dot_data * gdd)1019 int svg_io_graph(struct plot *plot, struct graph_dot_data *gdd)
1020 {
1021 int fd = plot->fd;;
1022 int col = 0;
1023 int row = 0;
1024 int arr_index;
1025 unsigned char val;
1026 int bit_index;
1027 int bit_mod;
1028
1029 for (row = gdd->rows - 1; row >= 0; row--) {
1030 for (col = 0; col < gdd->cols; col++) {
1031 bit_index = row * gdd->cols + col;
1032 arr_index = bit_index / 8;
1033 bit_mod = bit_index % 8;
1034
1035 if (arr_index < 0)
1036 continue;
1037 val = gdd->data[arr_index];
1038 if (val & (1 << bit_mod))
1039 svg_add_io(fd, floor(row / io_graph_scale), col, 1.5, 1.5, gdd->color);
1040 }
1041 }
1042 return 0;
1043 }
1044
svg_alloc_legend(struct plot * plot,int num_lines)1045 void svg_alloc_legend(struct plot *plot, int num_lines)
1046 {
1047 char **lines = calloc(num_lines, sizeof(char *));
1048 plot->legend_index = 0;
1049 plot->legend_lines = lines;
1050 plot->num_legend_lines = num_lines;
1051 }
1052
svg_free_legend(struct plot * plot)1053 void svg_free_legend(struct plot *plot)
1054 {
1055 int i;
1056 for (i = 0; i < plot->legend_index; i++)
1057 free(plot->legend_lines[i]);
1058 free(plot->legend_lines);
1059 plot->legend_lines = NULL;
1060 plot->legend_index = 0;
1061 }
1062
svg_write_legend(struct plot * plot)1063 void svg_write_legend(struct plot *plot)
1064 {
1065 int legend_line_x = axis_x_off(graph_width) + legend_x_off;
1066 int legend_line_y = axis_y_off(graph_height) + legend_y_off;
1067 int i;
1068
1069 if (plot->legend_index == 0)
1070 return;
1071
1072 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
1073 "fill=\"white\" filter=\"url(#shadow)\"/>\n",
1074 legend_line_x - 15,
1075 legend_line_y - 12,
1076 legend_width,
1077 plot->legend_index * legend_font_size + legend_font_size / 2 + 12);
1078
1079 write_check(plot->fd, line, strlen(line));
1080 for (i = 0; i < plot->legend_index; i++) {
1081 write_check(plot->fd, plot->legend_lines[i],
1082 strlen(plot->legend_lines[i]));
1083 free(plot->legend_lines[i]);
1084 }
1085 free(plot->legend_lines);
1086 plot->legend_lines = NULL;
1087 plot->legend_index = 0;
1088 }
1089
svg_add_legend(struct plot * plot,char * text,char * extra,char * color)1090 void svg_add_legend(struct plot *plot, char *text, char *extra, char *color)
1091 {
1092 int legend_line_x = axis_x_off(graph_width) + legend_x_off;
1093 int legend_line_y = axis_y_off(graph_height) + legend_y_off;
1094
1095 if (!text && (!extra || strlen(extra) == 0))
1096 return;
1097
1098 legend_line_y += plot->legend_index * legend_font_size + legend_font_size / 2;
1099 snprintf(line, line_len, "<path d=\"M %d %d h 8\" stroke=\"%s\" stroke-width=\"8\" "
1100 "filter=\"url(#labelshadow)\"/> "
1101 "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
1102 "fill=\"black\" style=\"text-anchor: left\">%s%s</text>\n",
1103 legend_line_x, legend_line_y,
1104 color, legend_line_x + 13,
1105 legend_line_y + 4, font_family, legend_font_size,
1106 text, extra);
1107
1108 plot->legend_lines[plot->legend_index++] = strdup(line);
1109 }
1110
set_legend_width(int longest_str)1111 void set_legend_width(int longest_str)
1112 {
1113 if (longest_str)
1114 legend_width = longest_str * (legend_font_size * 3 / 4) + 25;
1115 else
1116 legend_width = 0;
1117 }
1118
set_rolling_avg(int rolling)1119 void set_rolling_avg(int rolling)
1120 {
1121 rolling_avg_secs = rolling;
1122 }
1123
set_io_graph_scale(int scale)1124 void set_io_graph_scale(int scale)
1125 {
1126 io_graph_scale = scale;
1127 }
1128
set_graph_size(int width,int height)1129 void set_graph_size(int width, int height)
1130 {
1131 graph_width = width;
1132 graph_height = height;
1133 }
1134
get_graph_size(int * width,int * height)1135 void get_graph_size(int *width, int *height)
1136 {
1137 *width = graph_width;
1138 *height = graph_height;
1139 }
1140
set_graph_height(int h)1141 void set_graph_height(int h)
1142 {
1143 graph_height = h;
1144 }
set_graph_width(int w)1145 void set_graph_width(int w)
1146 {
1147 graph_width = w;
1148 }
1149