2 * Copyright (C) 2012 Fusion-io
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 * Parts of this file were imported from Jens Axboe's blktrace sources (also GPL)
19 #include <sys/types.h>
28 #include <asm/types.h>
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";
48 /* this is the title for the whole page */
49 static int plot_title_height = 50;
50 static int plot_title_font_size = 25;
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;
56 /* label for each axis is slightly smaller */
57 static int axis_label_font_size = 16;
59 int legend_x_off = 45;
60 int legend_y_off = -10;
61 int legend_font_size = 15;
62 int legend_width = 80;
64 static int rolling_avg_secs = 0;
66 static int line_len = 1024;
67 static char line[1024];
69 static int final_height = 0;
70 static int final_width = 0;
72 static char *colors[] = {
84 extern unsigned int longest_proc_name;
86 char *pick_color(void)
88 static int color_index;
89 char *ret = colors[color_index];
93 ret = colors[color_index];
99 char *pick_fio_color(void)
101 static int fio_color_index;
102 char *ret = colors[fio_color_index];
106 ret = colors[fio_color_index];
108 fio_color_index += 2;
112 static int cpu_color_index;
114 char *pick_cpu_color(void)
116 char *ret = colors[cpu_color_index];
119 ret = colors[cpu_color_index];
125 void reset_cpu_color(void)
130 struct graph_line_data *alloc_line_data(int min_seconds, int max_seconds, int stop_seconds)
132 int size = sizeof(struct graph_line_data) + (stop_seconds + 1) * sizeof(struct graph_line_pair);
133 struct graph_line_data *gld;
135 gld = calloc(1, size);
137 fprintf(stderr, "Unable to allocate memory for graph data\n");
140 gld->min_seconds = min_seconds;
141 gld->max_seconds = max_seconds;
142 gld->stop_seconds = stop_seconds;
146 void free_line_data(struct graph_line_data *gld)
152 struct graph_dot_data *alloc_dot_data(int min_seconds, int max_seconds, u64 min_offset, u64 max_offset, int stop_seconds, char *color, char *label)
156 int rows = graph_height * io_graph_scale;
157 int cols = graph_width;
158 struct graph_dot_data *gdd;
160 size = sizeof(struct graph_dot_data);
162 /* the number of bits */
163 arr_size = (rows + 1) * cols;
165 /* the number of bytes */
166 arr_size = (arr_size + 7) / 8;
168 gdd = calloc(1, size + arr_size);
170 fprintf(stderr, "Unable to allocate memory for graph data\n");
173 gdd->min_seconds = min_seconds;
174 gdd->max_seconds = max_seconds;
175 gdd->stop_seconds = stop_seconds;
178 gdd->min_offset = min_offset;
179 gdd->max_offset = max_offset;
183 if (strlen(label) > longest_proc_name)
184 longest_proc_name = strlen(label);
189 void free_dot_data(struct graph_dot_data *gdd)
194 void set_gdd_bit(struct graph_dot_data *gdd, u64 offset, double bytes, double time)
196 double bytes_per_row = (double)(gdd->max_offset - gdd->min_offset + 1) / gdd->rows;
197 double secs_per_col = (double)(gdd->max_seconds - gdd->min_seconds) / gdd->cols;
205 double mod = bytes_per_row;
207 if (offset > gdd->max_offset || offset < gdd->min_offset)
210 time = time / 1000000000.0;
211 while (bytes > 0 && offset <= gdd->max_offset) {
212 row = (double)(offset - gdd->min_offset) / bytes_per_row;
213 col = (time - gdd->min_seconds) / secs_per_col;
215 col_int = floor(col);
216 row_int = floor(row);
217 bit_index = row_int * gdd->cols + col_int;
218 arr_index = bit_index / 8;
219 bit_mod = bit_index % 8;
221 gdd->data[arr_index] |= 1 << bit_mod;
227 void print_gdd(struct graph_dot_data *gdd)
236 for (row = gdd->rows - 1; row >= 0; row--) {
237 for (col = 0; col < gdd->cols; col++) {
238 bit_index = row * gdd->cols + col;
239 arr_index = bit_index / sizeof(unsigned long);
240 bit_mod = bit_index % sizeof(unsigned long);
242 val = gdd->data[arr_index];
243 if (val & (1 << bit_mod))
252 static double rolling_avg(struct graph_line_pair *data, int index, int distance)
259 if (distance > index) {
262 start = index - distance;
265 while (start <= index) {
268 if (data[start].count)
269 avg = ((double)data[start].sum) / data[start].count;
277 return sum / distance;
280 void write_svg_header(int fd)
282 char *spaces = " \n";
283 char *header = "<svg xmlns=\"http://www.w3.org/2000/svg\">\n";
284 char *filter1 ="<filter id=\"shadow\">\n "
285 "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"4\" dy=\"4\" />\n "
286 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n "
287 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
289 char *filter2 ="<filter id=\"textshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n "
290 "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"1\" dy=\"1\" />\n "
291 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"1.5\" />\n "
292 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
294 char *filter3 ="<filter id=\"labelshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n "
295 "<feOffset result=\"offOut\" in=\"SourceGraphic\" dx=\"3\" dy=\"3\" />\n "
296 "<feColorMatrix result=\"matrixOut\" in=\"offOut\" type=\"matrix\" "
297 "values=\"0.2 0 0 0 0 0 0.2 0 0 0 0 0 0.2 0 0 0 0 0 1 0\" /> "
298 "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n "
299 "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n "
301 char *defs_start = "<defs>\n";
302 char *defs_close = "</defs>\n";
306 write(fd, header, strlen(header));
307 /* write a bunch of spaces so we can stuff in the width and height later */
308 write(fd, spaces, strlen(spaces));
309 write(fd, spaces, strlen(spaces));
310 write(fd, spaces, strlen(spaces));
312 write(fd, defs_start, strlen(defs_start));
313 write(fd, filter1, strlen(filter1));
314 write(fd, filter2, strlen(filter2));
315 write(fd, filter3, strlen(filter3));
316 write(fd, defs_close, strlen(defs_close));
319 void write_drop_shadow(struct plot *plot)
321 snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"white\"/>\n",
322 plot->start_y_offset, plot->total_width, 45);
323 write(plot->fd, line, strlen(line));
325 snprintf(line, line_len, "<path d=\"M %d %d h %d v %d h %d t %d %d V %d H %d Z\" "
326 "fill=\"white\" filter=\"url(#shadow)\"/>",
327 0, plot->start_y_offset,
328 plot->total_width - graph_left_pad / 2,
329 -plot->total_height, 24, 1, 1,
330 plot->start_y_offset + 10, 0);
331 write(plot->fd, line, strlen(line));
333 snprintf(line, line_len, "<path d=\"M %d %d H %d V %d h %d V %d H %d Z\" "
335 0, plot->start_y_offset - 15, /* start */
336 plot->total_width - graph_left_pad / 2 - 10, /* hline over */
337 plot->start_y_offset - plot->total_height, /* vline up */
339 plot->start_y_offset, /* vline back down */
341 write(plot->fd, line, strlen(line));
343 plot->start_y_offset += 45;
346 /* svg y offset for the traditional 0,0 (bottom left corner) of the plot */
347 static int axis_y(void)
349 return plot_label_height + graph_height + graph_inner_y_margin;
352 /* this gives you the correct pixel for a given offset from the bottom left y axis */
353 static double axis_y_off_double(double y)
355 return plot_label_height + graph_height - y;
358 static int axis_y_off(int y)
360 return axis_y_off_double(y);
363 /* svg x axis offset from 0 */
364 static int axis_x(void)
366 return graph_left_pad;
369 /* the correct pixel for a given X offset */
370 static double axis_x_off_double(double x)
372 return graph_left_pad + graph_inner_x_margin + x;
375 static int axis_x_off(int x)
377 return (int)axis_x_off_double(x);
381 * this draws a backing rectangle for the plot and it
382 * also creates a new svg element so our offsets can
383 * be relative to this one plot.
385 void setup_axis(struct plot *plot)
390 int bump_height = tick_font_size * 3 + axis_label_font_size;
391 int local_legend_width = legend_width;
394 local_legend_width = 0;
396 plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + local_legend_width;
397 plot->total_height = axis_y() + tick_label_pad + tick_font_size;
399 if (plot->add_xlabel)
400 plot->total_height += bump_height;
403 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
404 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
405 plot->start_x_offset,
406 plot->start_y_offset, plot->total_width + 40,
407 plot->total_height + 20);
409 write(fd, line, len);
411 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
412 "filter=\"url(#shadow)\" "
413 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
414 plot->start_x_offset + 15,
415 plot->start_y_offset, plot->total_width, plot->total_height);
417 write(fd, line, len);
418 plot->total_height += 20;
419 plot->total_width += 20;
421 if (plot->total_height + plot->start_y_offset > final_height)
422 final_height = plot->total_height + plot->start_y_offset;
423 if (plot->start_x_offset + plot->total_width + 40 > final_width)
424 final_width = plot->start_x_offset + plot->total_width + 40;
426 /* create an svg object for all our coords to be relative against */
427 snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset);
428 write(fd, line, strlen(line));
430 snprintf(line, 1024, "<path d=\"M%d %d h %d V %d H %d Z\" stroke=\"black\" stroke-width=\"2\" fill=\"none\"/>\n",
432 graph_width + graph_inner_x_margin * 2, axis_y_off(graph_height) - graph_inner_y_margin,
435 ret = write(fd, line, len);
437 fprintf(stderr, "failed to write svg axis\n");
443 * this draws a backing rectangle for the plot and it
444 * also creates a new svg element so our offsets can
445 * be relative to this one plot.
447 void setup_axis_spindle(struct plot *plot)
451 int bump_height = tick_font_size * 3 + axis_label_font_size;
455 plot->total_width = axis_x_off(graph_width) + legend_width;
456 plot->total_height = axis_y() + tick_label_pad + tick_font_size;
458 if (plot->add_xlabel)
459 plot->total_height += bump_height;
462 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
463 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
464 plot->start_x_offset,
465 plot->start_y_offset, plot->total_width + 10,
466 plot->total_height + 20);
468 write(fd, line, len);
470 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" "
471 "filter=\"url(#shadow)\" "
472 "height=\"%d\" fill=\"white\" stroke=\"none\"/>",
473 plot->start_x_offset + 15,
474 plot->start_y_offset, plot->total_width - 30,
477 write(fd, line, len);
478 plot->total_height += 20;
480 if (plot->total_height + plot->start_y_offset > final_height)
481 final_height = plot->total_height + plot->start_y_offset;
482 if (plot->start_x_offset + plot->total_width + 40 > final_width)
483 final_width = plot->start_x_offset + plot->total_width + 40;
485 /* create an svg object for all our coords to be relative against */
486 snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset);
487 write(fd, line, strlen(line));
491 /* draw a plot title. This should be done only once,
492 * and it bumps the plot width/height numbers by
495 * Call this before setting up the first axis
497 void set_plot_title(struct plot *plot, char *title)
502 plot->total_height = plot_title_height;
503 plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + legend_width;
506 snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"white\" stroke=\"none\"/>",
507 plot->start_y_offset, plot->total_width + 40, plot_title_height + 20);
509 write(fd, line, len);
511 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
512 "font-weight=\"bold\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
513 axis_x_off(graph_width / 2),
514 plot->start_y_offset + plot_title_height / 2,
515 font_family, plot_title_font_size, "middle", title);
516 plot->start_y_offset += plot_title_height;
518 write(fd, line, len);
521 #define TICK_MINI_STEPS 3
523 static double find_step(double first, double last, int num_ticks)
525 int mini_step[TICK_MINI_STEPS] = { 1, 2, 5 };
526 int cur_mini_step = 0;
527 double step = (last - first) / num_ticks;
528 double log10 = log(10);
530 /* Round to power of 10 */
531 step = exp(floor(log(step) / log10) * log10);
532 /* Scale down step to provide enough ticks */
533 while ((last - first) / (step * mini_step[cur_mini_step]) > num_ticks
534 && cur_mini_step < TICK_MINI_STEPS)
536 step *= mini_step[cur_mini_step - 1];
542 * create evenly spread out ticks along the xaxis. if tick only is set
543 * this just makes the ticks, otherwise it labels each tick as it goes
545 void set_xticks(struct plot *plot, int num_ticks, int first, int last)
550 int tick_y = axis_y_off(graph_tick_len) + graph_inner_y_margin;
551 int tick_x = axis_x();
552 int tick_only = plot->add_xlabel == 0;
554 int text_y = axis_y() + tick_label_pad;
556 char *middle = "middle";
557 char *start = "start";
559 step = find_step(first, last, num_ticks);
561 * We don't want last two ticks to be too close together so subtract
562 * 20% of the step from the interval
564 num_ticks = (double)(last - first - step / 5) / step + 1;
565 pixels_per_tick = graph_width * step / (double)(last - first);
567 for (i = 0; i < num_ticks; i++) {
570 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"2\" height=\"%d\" style=\"stroke:none;fill:black;\"/>\n",
571 tick_x, tick_y, graph_tick_len);
572 write(plot->fd, line, strlen(line));
580 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
581 "fill=\"black\" style=\"text-anchor: %s\">%d</text>\n",
582 tick_x, text_y, font_family, tick_font_size, anchor,
583 (int)(first + step * i));
585 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
586 "fill=\"black\" style=\"text-anchor: %s\">%.2f</text>\n",
587 tick_x, text_y, font_family, tick_font_size, anchor,
589 write(plot->fd, line, strlen(line));
591 tick_x += pixels_per_tick;
596 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
597 "fill=\"black\" style=\"text-anchor: middle\">%d</text>\n",
598 axis_x_off(graph_width - 2),
599 text_y, font_family, tick_font_size, last);
601 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
602 "fill=\"black\" style=\"text-anchor: middle\">%.2f</text>\n",
603 axis_x_off(graph_width - 2),
604 text_y, font_family, tick_font_size, (double)last);
605 write(plot->fd, line, strlen(line));
609 void set_ylabel(struct plot *plot, char *label)
614 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
615 "transform=\"rotate(-90 %d %d)\" font-weight=\"bold\" "
616 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
617 graph_left_pad / 2 - axis_label_font_size,
618 axis_y_off(graph_height / 2),
620 graph_left_pad / 2 - axis_label_font_size,
621 (int)axis_y_off(graph_height / 2),
622 axis_label_font_size, "middle", label);
624 write(fd, line, len);
627 void set_xlabel(struct plot *plot, char *label)
631 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
632 "font-weight=\"bold\" "
633 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
634 axis_x_off(graph_width / 2),
635 axis_y() + tick_font_size * 3 + axis_label_font_size / 2,
637 axis_label_font_size, "middle", label);
639 write(fd, line, len);
644 * create evenly spread out ticks along the y axis.
645 * The ticks are labeled as it goes
647 void set_yticks(struct plot *plot, int num_ticks, int first, int last, char *units)
649 int pixels_per_tick = graph_height / num_ticks;
650 int step = (last - first) / num_ticks;
653 int text_x = axis_x() - 6;
654 int tick_x = axis_x();
655 char *anchor = "end";
657 for (i = 0; i < num_ticks; i++) {
659 snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
660 "style=\"stroke:lightgray;stroke-width:2;stroke-dasharray:9,12;\"/>\n",
661 tick_x, axis_y_off(tick_y),
662 axis_x_off(graph_width), axis_y_off(tick_y));
663 write(plot->fd, line, strlen(line));
666 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
667 "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n",
669 axis_y_off(tick_y - tick_font_size / 2),
670 font_family, tick_font_size, anchor, first + step * i, units);
671 write(plot->fd, line, strlen(line));
672 tick_y += pixels_per_tick;
674 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
675 "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n",
676 text_x, axis_y_off(graph_height), font_family, tick_font_size, anchor, last, units);
677 write(plot->fd, line, strlen(line));
680 void set_plot_label(struct plot *plot, char *label)
685 snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" "
686 "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n",
687 axis_x() + graph_width / 2,
688 plot_label_height / 2,
689 font_family, plot_label_font_size, "middle", label);
691 write(fd, line, len);
694 static void close_svg(int fd)
696 char *close_line = "</svg>\n";
698 write(fd, close_line, strlen(close_line));
701 int close_plot(struct plot *plot)
704 if (plot->direction == PLOT_DOWN)
705 plot->start_y_offset += plot->total_height;
706 else if (plot->direction == PLOT_ACROSS)
707 plot->start_x_offset += plot->total_width;
711 struct plot *alloc_plot(void)
714 plot = calloc(1, sizeof(*plot));
716 fprintf(stderr, "Unable to allocate memory %s\n", strerror(errno));
723 int close_plot_file(struct plot *plot)
726 ret = lseek(plot->fd, 0, SEEK_SET);
727 if (ret == (off_t)-1) {
731 final_width = ((final_width + 1) / 2) * 2;
732 final_height = ((final_height + 1) / 2) * 2;
733 snprintf(line, line_len, "<svg xmlns=\"http://www.w3.org/2000/svg\" "
734 "width=\"%d\" height=\"%d\">\n",
735 final_width, final_height);
736 write(plot->fd, line, strlen(line));
737 snprintf(line, line_len, "<rect x=\"0\" y=\"0\" width=\"%d\" "
738 "height=\"%d\" fill=\"white\"/>\n", final_width, final_height);
739 write(plot->fd, line, strlen(line));
745 void set_plot_output(struct plot *plot, char *filename)
750 close_plot_file(plot);
751 fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
753 fprintf(stderr, "Unable to open output file %s err %s\n", filename, strerror(errno));
757 plot->start_y_offset = plot->start_x_offset = 0;
758 write_svg_header(fd);
761 char *byte_unit_names[] = { "", "K", "M", "G", "T", "P", "E", "Z", "Y", "unobtainium" };
762 int MAX_BYTE_UNIT_SCALE = 9;
764 char *time_unit_names[] = { "n", "u", "m", "s" };
765 int MAX_TIME_UNIT_SCALE = 3;
767 void scale_line_graph_bytes(u64 *max, char **units, u64 factor)
772 while (val > factor * 64) {
777 *units = byte_unit_names[scale];
781 if (scale > MAX_BYTE_UNIT_SCALE)
782 scale = MAX_BYTE_UNIT_SCALE;
787 void scale_line_graph_time(u64 *max, char **units)
792 while (val > 1000 * 10) {
796 if (scale == MAX_TIME_UNIT_SCALE)
799 *units = time_unit_names[scale];
806 int svg_line_graph(struct plot *plot, struct graph_line_data *gld, char *color, int thresh1, int thresh2)
813 char *start = "<path d=\"";
814 double yscale = ((double)gld->max) / graph_height;
815 double xscale = (double)(gld->max_seconds - gld->min_seconds - 1) / graph_width;
818 int printed_header = 0;
819 int printed_lines = 0;
821 if (thresh1 && thresh2)
823 else if (rolling_avg_secs)
824 rolling = rolling_avg_secs;
826 rolling = (gld->stop_seconds - gld->min_seconds) / 25;
828 for (i = gld->min_seconds; i < gld->stop_seconds; i++) {
829 avg = rolling_avg(gld->data, i, rolling);
835 if (val > graph_height)
840 x = (double)(i - gld->min_seconds) / xscale;
841 if (!thresh1 && !thresh2) {
843 if (!printed_header) {
844 write(fd, start, strlen(start));
848 /* in full line mode, everything in the graph is connected */
849 snprintf(line, line_len, "%c %d %d ", c, axis_x_off(x), axis_y_off(val));
851 write(fd, line, strlen(line));
853 } else if (avg > thresh1 || avg > thresh2) {
855 if (!printed_header) {
856 write(fd, start, strlen(start));
860 /* otherwise, we just print a bar up there to show this one data point */
861 if (i >= gld->stop_seconds - 2)
865 * we don't use the rolling averages here to show high
868 snprintf(line, line_len, "M %d %d h %d ", axis_x_off(x),
869 axis_y_off(val), len);
870 write(fd, line, strlen(line));
876 snprintf(line, line_len, "\" fill=\"none\" stroke=\"%s\" stroke-width=\"2\"/>\n", color);
877 write(fd, line, strlen(line));
880 svg_write_time_line(plot, plot->timeline);
885 void svg_write_time_line(struct plot *plot, int col)
887 snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
888 "style=\"stroke:black;stroke-width:2;\"/>\n",
889 axis_x_off(col), axis_y_off(0),
890 axis_x_off(col), axis_y_off(graph_height));
891 write(plot->fd, line, strlen(line));
894 static int svg_add_io(int fd, double row, double col, double width, double height, char *color)
898 snprintf(line, line_len, "<rect x=\"%.2f\" y=\"%.2f\" width=\"%.1f\" height=\"%.1f\" "
899 "rx=\"%.2f\" style=\"stroke:none;fill:%s;stroke-width:0\"/>\n",
900 axis_x_off_double(col), axis_y_off_double(row), width, height, rx, color);
901 return write(fd, line, strlen(line));
904 int svg_io_graph_movie_array(struct plot *plot, struct pid_plot_history *pph)
911 for (i = 0; i < pph->num_used; i++) {
912 cell_index = pph->history[i];
913 movie_row = floor(cell_index / graph_width);
914 movie_col = cell_index - movie_row * graph_width;
915 svg_add_io(plot->fd, movie_row, movie_col, 4, 4, pph->color);
920 static float spindle_steps = 0;
922 void rewind_spindle_steps(int num)
924 spindle_steps -= num * 0.01;
927 int svg_io_graph_movie_array_spindle(struct plot *plot, struct pid_plot_history *pph)
932 double cells_per_circle;
934 double degrees_per_cell;
938 double graph_width_extra = graph_width + graph_circle_extra;
939 double graph_height_extra = graph_height + graph_circle_extra;
942 if (graph_width_extra > graph_height_extra)
943 graph_width_extra = graph_height_extra;
945 if (graph_width_extra < graph_height_extra)
946 graph_height_extra = graph_width_extra;
948 radius = graph_width_extra;
950 center_x = axis_x_off_double(graph_width_extra / 2);
951 center_y = axis_y_off_double(graph_height_extra / 2);
953 snprintf(line, line_len, "<g transform=\"rotate(%.4f, %.2f, %.2f)\"> "
954 "<circle cx=\"%.2f\" cy=\"%.2f\" "
955 "stroke=\"black\" stroke-width=\"6\" "
956 "r=\"%.2f\" fill=\"none\"/>\n",
957 spindle_steps * 1.2, center_x, center_y, center_x, center_y, graph_width_extra / 2);
958 write(plot->fd, line, strlen(line));
959 snprintf(line, line_len, "<circle cx=\"%.2f\" cy=\"%.2f\" "
960 "stroke=\"none\" fill=\"red\" r=\"%.2f\"/>\n</g>\n",
961 axis_x_off_double(graph_width_extra), center_y, 4.5);
962 write(plot->fd, line, strlen(line));
963 spindle_steps += 0.01;
965 radius = floor(radius / 2);
966 num_circles = radius / 4 - 3;
967 cells_per_circle = pph->history_max / num_circles;
968 degrees_per_cell = 360 / cells_per_circle;
970 for (i = 0; i < pph->num_used; i++) {
971 cell_index = pph->history[i];
972 circle_num = floor(cell_index / cells_per_circle);
973 rot = cell_index - circle_num * cells_per_circle;
974 circle_num = num_circles - circle_num;
975 radius = circle_num * 4;
977 rot = rot * degrees_per_cell;
978 rot -= spindle_steps;
979 snprintf(line, line_len, "<path transform=\"rotate(%.4f, %.2f, %.2f)\" "
980 "d=\"M %.2f %.2f a %.2f %.2f 0 0 1 0 5\" "
981 "stroke=\"%s\" stroke-width=\"4\"/>\n",
982 -rot, center_x, center_y,
983 axis_x_off_double(graph_width_extra / 2 + radius) + 8, center_y,
984 radius, radius, pph->color);
986 write(plot->fd, line, strlen(line));
991 static int add_plot_history(struct pid_plot_history *pph, double val)
993 if (pph->num_used == pph->history_len) {
994 pph->history_len += 4096;
995 pph->history = realloc(pph->history,
996 pph->history_len * sizeof(double));
998 perror("Unable to allocate memory");
1002 pph->history[pph->num_used++] = val;
1006 int svg_io_graph_movie(struct graph_dot_data *gdd, struct pid_plot_history *pph, int col)
1013 double blocks_per_row = (gdd->max_offset - gdd->min_offset + 1) / gdd->rows;
1014 double movie_blocks_per_cell = (gdd->max_offset - gdd->min_offset + 1) / (graph_width * graph_height);
1016 int margin_orig = graph_inner_y_margin;
1018 graph_inner_y_margin += 5;
1019 pph->history_max = (gdd->max_offset - gdd->min_offset + 1) / movie_blocks_per_cell;
1021 for (row = gdd->rows - 1; row >= 0; row--) {
1022 bit_index = row * gdd->cols + col;
1023 arr_index = bit_index / 8;
1024 bit_mod = bit_index % 8;
1028 val = gdd->data[arr_index];
1029 if (val & (1 << bit_mod)) {
1030 /* in bytes, linear offset from the start of the drive */
1031 cell_index = (double)row * blocks_per_row;
1033 /* a cell number in the graph */
1034 cell_index /= movie_blocks_per_cell;
1036 add_plot_history(pph, cell_index);
1039 graph_inner_y_margin = margin_orig;
1043 int svg_io_graph(struct plot *plot, struct graph_dot_data *gdd)
1053 for (row = gdd->rows - 1; row >= 0; row--) {
1054 for (col = 0; col < gdd->cols; col++) {
1055 bit_index = row * gdd->cols + col;
1056 arr_index = bit_index / 8;
1057 bit_mod = bit_index % 8;
1061 val = gdd->data[arr_index];
1062 if (val & (1 << bit_mod))
1063 svg_add_io(fd, floor(row / io_graph_scale), col, 1.5, 1.5, gdd->color);
1069 void svg_alloc_legend(struct plot *plot, int num_lines)
1071 char **lines = calloc(num_lines, sizeof(char *));
1072 plot->legend_index = 0;
1073 plot->legend_lines = lines;
1074 plot->num_legend_lines = num_lines;
1077 void svg_free_legend(struct plot *plot)
1080 for (i = 0; i < plot->legend_index; i++)
1081 free(plot->legend_lines[i]);
1082 free(plot->legend_lines);
1083 plot->legend_lines = NULL;
1084 plot->legend_index = 0;
1087 void svg_write_legend(struct plot *plot)
1089 int legend_line_x = axis_x_off(graph_width) + legend_x_off;
1090 int legend_line_y = axis_y_off(graph_height) + legend_y_off;
1093 if (plot->legend_index == 0)
1096 snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
1097 "fill=\"white\" filter=\"url(#shadow)\"/>\n",
1101 plot->legend_index * legend_font_size + legend_font_size / 2 + 12);
1103 write(plot->fd, line, strlen(line));
1104 for (i = 0; i < plot->legend_index; i++) {
1105 write(plot->fd, plot->legend_lines[i],
1106 strlen(plot->legend_lines[i]));
1107 free(plot->legend_lines[i]);
1109 free(plot->legend_lines);
1110 plot->legend_lines = NULL;
1111 plot->legend_index = 0;
1114 void svg_add_legend(struct plot *plot, char *text, char *extra, char *color)
1116 int legend_line_x = axis_x_off(graph_width) + legend_x_off;
1117 int legend_line_y = axis_y_off(graph_height) + legend_y_off;
1119 if (!text && (!extra || strlen(extra) == 0))
1122 legend_line_y += plot->legend_index * legend_font_size + legend_font_size / 2;
1123 snprintf(line, line_len, "<path d=\"M %d %d h 8\" stroke=\"%s\" stroke-width=\"8\" "
1124 "filter=\"url(#labelshadow)\"/> "
1125 "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" "
1126 "fill=\"black\" style=\"text-anchor: left\">%s%s</text>\n",
1127 legend_line_x, legend_line_y,
1128 color, legend_line_x + 13,
1129 legend_line_y + 4, font_family, legend_font_size,
1132 plot->legend_lines[plot->legend_index++] = strdup(line);
1135 void set_legend_width(int longest_str)
1138 legend_width = longest_str * (legend_font_size * 3 / 4) + 25;
1143 void set_rolling_avg(int rolling)
1145 rolling_avg_secs = rolling;
1148 void set_io_graph_scale(int scale)
1150 io_graph_scale = scale;
1153 void set_graph_size(int width, int height)
1155 graph_width = width;
1156 graph_height = height;
1159 void get_graph_size(int *width, int *height)
1161 *width = graph_width;
1162 *height = graph_height;
1165 void set_graph_height(int h)
1169 void set_graph_width(int w)