| 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 | struct graph_line_data *alloc_line_data(int seconds, int stop_seconds) |
| 73 | { |
| 74 | int size = sizeof(struct graph_line_data) + (stop_seconds + 1) * sizeof(struct graph_line_pair); |
| 75 | struct graph_line_data *gld; |
| 76 | |
| 77 | gld = calloc(1, size); |
| 78 | if (!gld) { |
| 79 | fprintf(stderr, "Unable to allocate memory for graph data\n"); |
| 80 | exit(1); |
| 81 | } |
| 82 | gld->seconds = seconds; |
| 83 | gld->stop_seconds = stop_seconds; |
| 84 | return gld; |
| 85 | } |
| 86 | |
| 87 | void free_line_data(struct graph_line_data *gld) |
| 88 | { |
| 89 | free(gld->label); |
| 90 | free(gld); |
| 91 | } |
| 92 | |
| 93 | struct graph_dot_data *alloc_dot_data(int seconds, u64 max_offset, int stop_seconds) |
| 94 | { |
| 95 | int size; |
| 96 | int arr_size; |
| 97 | int rows = graph_height * io_graph_scale; |
| 98 | int cols = graph_width; |
| 99 | struct graph_dot_data *gdd; |
| 100 | |
| 101 | size = sizeof(struct graph_dot_data); |
| 102 | |
| 103 | /* the number of bits */ |
| 104 | arr_size = (rows + 1) * cols; |
| 105 | |
| 106 | /* the number of bytes */ |
| 107 | arr_size /= 8; |
| 108 | |
| 109 | gdd = calloc(1, size + arr_size); |
| 110 | if (!gdd) { |
| 111 | fprintf(stderr, "Unable to allocate memory for graph data\n"); |
| 112 | exit(1); |
| 113 | } |
| 114 | gdd->seconds = seconds; |
| 115 | gdd->stop_seconds = stop_seconds; |
| 116 | gdd->rows = rows; |
| 117 | gdd->cols = cols; |
| 118 | gdd->max_offset = max_offset; |
| 119 | return gdd; |
| 120 | } |
| 121 | |
| 122 | void free_dot_data(struct graph_dot_data *gdd) |
| 123 | { |
| 124 | free(gdd); |
| 125 | } |
| 126 | |
| 127 | void set_gdd_bit(struct graph_dot_data *gdd, u64 offset, double bytes, double time) |
| 128 | { |
| 129 | double bytes_per_row = (double)gdd->max_offset / gdd->rows; |
| 130 | |
| 131 | double secs_per_col = (double)gdd->seconds / gdd->cols; |
| 132 | double col; |
| 133 | double row; |
| 134 | int col_int; |
| 135 | int row_int; |
| 136 | int bit_index; |
| 137 | int arr_index; |
| 138 | int bit_mod; |
| 139 | double mod = bytes_per_row; |
| 140 | |
| 141 | if (offset > gdd->max_offset) |
| 142 | return; |
| 143 | |
| 144 | gdd->total_ios++; |
| 145 | time = time / 1000000000.0; |
| 146 | while (bytes > 0) { |
| 147 | row = (double)offset / bytes_per_row; |
| 148 | col = time / secs_per_col; |
| 149 | |
| 150 | col_int = floor(col); |
| 151 | row_int = floor(row); |
| 152 | bit_index = row_int * gdd->cols + col_int; |
| 153 | arr_index = bit_index / 8; |
| 154 | bit_mod = bit_index % 8; |
| 155 | |
| 156 | gdd->data[arr_index] |= 1 << bit_mod; |
| 157 | offset += mod; |
| 158 | bytes -= mod; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | void print_gdd(struct graph_dot_data *gdd) |
| 163 | { |
| 164 | int col = 0; |
| 165 | int row = 0; |
| 166 | int arr_index; |
| 167 | u64 val; |
| 168 | int bit_index; |
| 169 | int bit_mod; |
| 170 | |
| 171 | for (row = gdd->rows - 1; row >= 0; row--) { |
| 172 | for (col = 0; col < gdd->cols; col++) { |
| 173 | bit_index = row * gdd->cols + col; |
| 174 | arr_index = bit_index / sizeof(unsigned long); |
| 175 | bit_mod = bit_index % sizeof(unsigned long); |
| 176 | |
| 177 | val = gdd->data[arr_index]; |
| 178 | if (val & (1 << bit_mod)) |
| 179 | printf("*"); |
| 180 | else |
| 181 | printf(" "); |
| 182 | } |
| 183 | printf("\n"); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | static double rolling_avg(struct graph_line_pair *data, int index, int distance) |
| 188 | { |
| 189 | double sum = 0; |
| 190 | int start; |
| 191 | |
| 192 | if (distance < 0) |
| 193 | distance = 1; |
| 194 | if (distance > index) { |
| 195 | start = 0; |
| 196 | } else { |
| 197 | start = index - distance; |
| 198 | } |
| 199 | distance = 0; |
| 200 | while (start <= index) { |
| 201 | double avg; |
| 202 | |
| 203 | if (data[start].count) |
| 204 | avg = ((double)data[start].sum) / data[start].count; |
| 205 | else |
| 206 | avg= 0; |
| 207 | |
| 208 | sum += avg; |
| 209 | distance++; |
| 210 | start++; |
| 211 | } |
| 212 | return sum / distance; |
| 213 | } |
| 214 | |
| 215 | void write_svg_header(int fd) |
| 216 | { |
| 217 | char *spaces = " \n"; |
| 218 | char *header = "<svg xmlns=\"http://www.w3.org/2000/svg\">\n"; |
| 219 | char *filter1 ="<filter id=\"shadow\">\n " |
| 220 | "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"4\" dy=\"4\" />\n " |
| 221 | "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n " |
| 222 | "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n " |
| 223 | "</filter>\n"; |
| 224 | char *filter2 ="<filter id=\"textshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n " |
| 225 | "<feOffset result=\"offOut\" in=\"SourceAlpha\" dx=\"1\" dy=\"1\" />\n " |
| 226 | "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"1.5\" />\n " |
| 227 | "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n " |
| 228 | "</filter>\n"; |
| 229 | char *filter3 ="<filter id=\"labelshadow\" x=\"0\" y=\"0\" width=\"200%\" height=\"200%\">\n " |
| 230 | "<feOffset result=\"offOut\" in=\"SourceGraphic\" dx=\"3\" dy=\"3\" />\n " |
| 231 | "<feColorMatrix result=\"matrixOut\" in=\"offOut\" type=\"matrix\" " |
| 232 | "values=\"0.2 0 0 0 0 0 0.2 0 0 0 0 0 0.2 0 0 0 0 0 1 0\" /> " |
| 233 | "<feGaussianBlur result=\"blurOut\" in=\"offOut\" stdDeviation=\"2\" />\n " |
| 234 | "<feBlend in=\"SourceGraphic\" in2=\"blurOut\" mode=\"normal\" />\n " |
| 235 | "</filter>\n"; |
| 236 | char *defs_start = "<defs>\n"; |
| 237 | char *defs_close = "</defs>\n"; |
| 238 | final_width = 0; |
| 239 | final_height = 0; |
| 240 | |
| 241 | write(fd, header, strlen(header)); |
| 242 | /* write a bunch of spaces so we can stuff in the width and height later */ |
| 243 | write(fd, spaces, strlen(spaces)); |
| 244 | |
| 245 | write(fd, defs_start, strlen(defs_start)); |
| 246 | write(fd, filter1, strlen(filter1)); |
| 247 | write(fd, filter2, strlen(filter2)); |
| 248 | write(fd, filter3, strlen(filter3)); |
| 249 | write(fd, defs_close, strlen(defs_close)); |
| 250 | } |
| 251 | |
| 252 | void write_drop_shadow(struct plot *plot) |
| 253 | { |
| 254 | snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"white\"/>\n", |
| 255 | plot->start_y_offset, plot->total_width, 45); |
| 256 | write(plot->fd, line, strlen(line)); |
| 257 | |
| 258 | snprintf(line, line_len, "<path d=\"M %d %d h %d v %d h %d t %d %d V %d H %d Z\" " |
| 259 | "fill=\"white\" filter=\"url(#shadow)\"/>", |
| 260 | 0, plot->start_y_offset, |
| 261 | plot->total_width - graph_left_pad / 2, |
| 262 | -plot->total_height, 24, 1, 1, |
| 263 | plot->start_y_offset + 10, 0); |
| 264 | write(plot->fd, line, strlen(line)); |
| 265 | |
| 266 | snprintf(line, line_len, "<path d=\"M %d %d H %d V %d h %d V %d H %d Z\" " |
| 267 | "fill=\"white\"/>", |
| 268 | 0, plot->start_y_offset - 15, /* start */ |
| 269 | plot->total_width - graph_left_pad / 2 - 10, /* hline over */ |
| 270 | plot->start_y_offset - plot->total_height, /* vline up */ |
| 271 | 15, /*hline over */ |
| 272 | plot->start_y_offset, /* vline back down */ |
| 273 | 0); |
| 274 | write(plot->fd, line, strlen(line)); |
| 275 | |
| 276 | plot->start_y_offset += 45; |
| 277 | } |
| 278 | |
| 279 | /* svg y offset for the traditional 0,0 (bottom left corner) of the plot */ |
| 280 | static int axis_y(void) |
| 281 | { |
| 282 | return plot_label_height + graph_height + graph_inner_y_margin; |
| 283 | } |
| 284 | |
| 285 | /* this gives you the correct pixel for a given offset from the bottom left y axis */ |
| 286 | static double axis_y_off_double(double y) |
| 287 | { |
| 288 | return plot_label_height + graph_height - y; |
| 289 | } |
| 290 | |
| 291 | static int axis_y_off(int y) |
| 292 | { |
| 293 | return axis_y_off_double(y); |
| 294 | } |
| 295 | |
| 296 | /* svg x axis offset from 0 */ |
| 297 | static int axis_x(void) |
| 298 | { |
| 299 | return graph_left_pad; |
| 300 | } |
| 301 | |
| 302 | /* the correct pixel for a given X offset */ |
| 303 | static double axis_x_off_double(double x) |
| 304 | { |
| 305 | return graph_left_pad + graph_inner_x_margin + x; |
| 306 | } |
| 307 | |
| 308 | static int axis_x_off(int x) |
| 309 | { |
| 310 | return (int)axis_x_off_double(x); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | /* |
| 315 | * this draws a backing rectangle for the plot and it |
| 316 | * also creates a new svg element so our offsets can |
| 317 | * be relative to this one plot. |
| 318 | */ |
| 319 | void setup_axis(struct plot *plot) |
| 320 | { |
| 321 | int ret; |
| 322 | int len; |
| 323 | int fd = plot->fd; |
| 324 | int bump_height = tick_font_size * 3 + axis_label_font_size; |
| 325 | |
| 326 | plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + legend_width; |
| 327 | plot->total_height = axis_y() + tick_label_pad + tick_font_size; |
| 328 | |
| 329 | if (plot->add_xlabel) |
| 330 | plot->total_height += bump_height; |
| 331 | |
| 332 | /* backing rect */ |
| 333 | snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" " |
| 334 | "height=\"%d\" fill=\"white\" stroke=\"none\"/>", |
| 335 | plot->start_y_offset, plot->total_width + 40, |
| 336 | plot->total_height + 20); |
| 337 | len = strlen(line); |
| 338 | write(fd, line, len); |
| 339 | |
| 340 | snprintf(line, line_len, "<rect x=\"15\" y=\"%d\" width=\"%d\" " |
| 341 | "filter=\"url(#shadow)\" " |
| 342 | "height=\"%d\" fill=\"white\" stroke=\"none\"/>", |
| 343 | plot->start_y_offset, plot->total_width, plot->total_height); |
| 344 | len = strlen(line); |
| 345 | write(fd, line, len); |
| 346 | plot->total_height += 20; |
| 347 | |
| 348 | if (plot->total_height + plot->start_y_offset > final_height) |
| 349 | final_height = plot->total_height + plot->start_y_offset; |
| 350 | if (plot->total_width + 40 > final_width) |
| 351 | final_width = plot->total_width + 40; |
| 352 | |
| 353 | /* create an svg object for all our coords to be relative against */ |
| 354 | snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset); |
| 355 | write(fd, line, strlen(line)); |
| 356 | |
| 357 | snprintf(line, 1024, "<path d=\"M%d %d h %d V %d H %d Z\" stroke=\"black\" stroke-width=\"2\" fill=\"none\"/>\n", |
| 358 | axis_x(), axis_y(), |
| 359 | graph_width + graph_inner_x_margin * 2, axis_y_off(graph_height) - graph_inner_y_margin, |
| 360 | axis_x()); |
| 361 | len = strlen(line); |
| 362 | ret = write(fd, line, len); |
| 363 | if (ret != len) { |
| 364 | fprintf(stderr, "failed to write svg axis\n"); |
| 365 | exit(1); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * this draws a backing rectangle for the plot and it |
| 371 | * also creates a new svg element so our offsets can |
| 372 | * be relative to this one plot. |
| 373 | */ |
| 374 | void setup_axis_spindle(struct plot *plot) |
| 375 | { |
| 376 | int len; |
| 377 | int fd = plot->fd; |
| 378 | int bump_height = tick_font_size * 3 + axis_label_font_size; |
| 379 | |
| 380 | plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + legend_width; |
| 381 | plot->total_height = axis_y() + tick_label_pad + tick_font_size; |
| 382 | |
| 383 | if (plot->add_xlabel) |
| 384 | plot->total_height += bump_height; |
| 385 | |
| 386 | /* backing rect */ |
| 387 | snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" " |
| 388 | "height=\"%d\" fill=\"white\" stroke=\"none\"/>", |
| 389 | plot->start_y_offset, plot->total_width + 40, |
| 390 | plot->total_height + 20); |
| 391 | len = strlen(line); |
| 392 | write(fd, line, len); |
| 393 | |
| 394 | snprintf(line, line_len, "<rect x=\"15\" y=\"%d\" width=\"%d\" " |
| 395 | "filter=\"url(#shadow)\" " |
| 396 | "height=\"%d\" fill=\"white\" stroke=\"none\"/>", |
| 397 | plot->start_y_offset, plot->total_width, plot->total_height); |
| 398 | len = strlen(line); |
| 399 | write(fd, line, len); |
| 400 | plot->total_height += 20; |
| 401 | |
| 402 | if (plot->total_height + plot->start_y_offset > final_height) |
| 403 | final_height = plot->total_height + plot->start_y_offset; |
| 404 | if (plot->total_width + 40 > final_width) |
| 405 | final_width = plot->total_width + 40; |
| 406 | |
| 407 | /* create an svg object for all our coords to be relative against */ |
| 408 | snprintf(line, line_len, "<svg x=\"%d\" y=\"%d\">\n", plot->start_x_offset, plot->start_y_offset); |
| 409 | write(fd, line, strlen(line)); |
| 410 | |
| 411 | } |
| 412 | |
| 413 | /* draw a plot title. This should be done only once, |
| 414 | * and it bumps the plot width/height numbers by |
| 415 | * what it draws. |
| 416 | * |
| 417 | * Call this before setting up the first axis |
| 418 | */ |
| 419 | void set_plot_title(struct plot *plot, char *title) |
| 420 | { |
| 421 | int len; |
| 422 | int fd = plot->fd; |
| 423 | |
| 424 | plot->total_height = plot_title_height; |
| 425 | plot->total_width = axis_x_off(graph_width) + graph_left_pad / 2 + legend_width; |
| 426 | |
| 427 | /* backing rect */ |
| 428 | snprintf(line, line_len, "<rect x=\"0\" y=\"%d\" width=\"%d\" height=\"%d\" fill=\"white\" stroke=\"none\"/>", |
| 429 | plot->start_y_offset, plot->total_width + 40, plot_title_height + 20); |
| 430 | len = strlen(line); |
| 431 | write(fd, line, len); |
| 432 | |
| 433 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 434 | "font-weight=\"bold\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n", |
| 435 | axis_x_off(graph_width / 2), |
| 436 | plot->start_y_offset + plot_title_height / 2, |
| 437 | font_family, plot_title_font_size, "middle", title); |
| 438 | plot->start_y_offset += plot_title_height; |
| 439 | len = strlen(line); |
| 440 | write(fd, line, len); |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * create evenly spread out ticks along the xaxis. if tick only is set |
| 445 | * this just makes the ticks, otherwise it labels each tick as it goes |
| 446 | */ |
| 447 | void set_xticks(struct plot *plot, int num_ticks, int first, int last) |
| 448 | { |
| 449 | int pixels_per_tick = graph_width / num_ticks; |
| 450 | int step = (last - first) / num_ticks; |
| 451 | int i; |
| 452 | int tick_y = axis_y_off(graph_tick_len) + graph_inner_y_margin; |
| 453 | int tick_x = axis_x(); |
| 454 | int tick_only = plot->add_xlabel == 0; |
| 455 | |
| 456 | int text_y = axis_y() + tick_label_pad; |
| 457 | |
| 458 | char *middle = "middle"; |
| 459 | char *start = "start"; |
| 460 | |
| 461 | for (i = 0; i < num_ticks; i++) { |
| 462 | char *anchor; |
| 463 | if (i != 0) { |
| 464 | snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"2\" height=\"%d\" style=\"stroke:none;fill:black;\"/>\n", |
| 465 | tick_x, tick_y, graph_tick_len); |
| 466 | write(plot->fd, line, strlen(line)); |
| 467 | anchor = middle; |
| 468 | } else { |
| 469 | anchor = start; |
| 470 | } |
| 471 | |
| 472 | if (!tick_only) { |
| 473 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 474 | "fill=\"black\" style=\"text-anchor: %s\">%d</text>\n", |
| 475 | tick_x, text_y, font_family, tick_font_size, anchor, step * i); |
| 476 | write(plot->fd, line, strlen(line)); |
| 477 | } |
| 478 | tick_x += pixels_per_tick; |
| 479 | } |
| 480 | |
| 481 | if (!tick_only) { |
| 482 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 483 | "fill=\"black\" style=\"text-anchor: middle\">%d</text>\n", |
| 484 | axis_x_off(graph_width - 2), |
| 485 | text_y, font_family, tick_font_size, last); |
| 486 | write(plot->fd, line, strlen(line)); |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | void set_ylabel(struct plot *plot, char *label) |
| 491 | { |
| 492 | int len; |
| 493 | int fd = plot->fd; |
| 494 | |
| 495 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" " |
| 496 | "transform=\"rotate(-90 %d %d)\" font-weight=\"bold\" " |
| 497 | "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n", |
| 498 | graph_left_pad / 2 - axis_label_font_size, |
| 499 | axis_y_off(graph_height / 2), |
| 500 | font_family, |
| 501 | graph_left_pad / 2 - axis_label_font_size, |
| 502 | (int)axis_y_off(graph_height / 2), |
| 503 | axis_label_font_size, "middle", label); |
| 504 | len = strlen(line); |
| 505 | write(fd, line, len); |
| 506 | } |
| 507 | |
| 508 | void set_xlabel(struct plot *plot, char *label) |
| 509 | { |
| 510 | int len; |
| 511 | int fd = plot->fd; |
| 512 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" " |
| 513 | "font-weight=\"bold\" " |
| 514 | "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n", |
| 515 | axis_x_off(graph_width / 2), |
| 516 | axis_y() + tick_font_size * 3 + axis_label_font_size / 2, |
| 517 | font_family, |
| 518 | axis_label_font_size, "middle", label); |
| 519 | len = strlen(line); |
| 520 | write(fd, line, len); |
| 521 | |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * create evenly spread out ticks along the y axis. |
| 526 | * The ticks are labeled as it goes |
| 527 | */ |
| 528 | void set_yticks(struct plot *plot, int num_ticks, int first, int last, char *units) |
| 529 | { |
| 530 | int pixels_per_tick = graph_height / num_ticks; |
| 531 | int step = (last - first) / num_ticks; |
| 532 | int i; |
| 533 | int tick_y = 0; |
| 534 | int text_x = axis_x() - 6; |
| 535 | int tick_x = axis_x(); |
| 536 | char *anchor = "end"; |
| 537 | |
| 538 | for (i = 0; i < num_ticks; i++) { |
| 539 | if (i != 0) { |
| 540 | snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" " |
| 541 | "style=\"stroke:lightgray;stroke-width:2;stroke-dasharray:9,12;\"/>\n", |
| 542 | tick_x, axis_y_off(tick_y), |
| 543 | axis_x_off(graph_width), axis_y_off(tick_y)); |
| 544 | write(plot->fd, line, strlen(line)); |
| 545 | } |
| 546 | |
| 547 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 548 | "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n", |
| 549 | text_x, |
| 550 | axis_y_off(tick_y - tick_font_size / 2), |
| 551 | font_family, tick_font_size, anchor, step * i, units); |
| 552 | write(plot->fd, line, strlen(line)); |
| 553 | tick_y += pixels_per_tick; |
| 554 | } |
| 555 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 556 | "fill=\"black\" style=\"text-anchor: %s\">%d%s</text>\n", |
| 557 | text_x, axis_y_off(graph_height), font_family, tick_font_size, anchor, last, units); |
| 558 | write(plot->fd, line, strlen(line)); |
| 559 | } |
| 560 | |
| 561 | void set_plot_label(struct plot *plot, char *label) |
| 562 | { |
| 563 | int len; |
| 564 | int fd = plot->fd; |
| 565 | |
| 566 | snprintf(line, line_len, "<text x=\"%d\" y=\"%d\" font-family=\"%s\" " |
| 567 | "font-size=\"%d\" fill=\"black\" style=\"text-anchor: %s\">%s</text>\n", |
| 568 | axis_x() + graph_width / 2, |
| 569 | plot_label_height / 2, |
| 570 | font_family, plot_label_font_size, "middle", label); |
| 571 | len = strlen(line); |
| 572 | write(fd, line, len); |
| 573 | } |
| 574 | |
| 575 | static void close_svg(int fd) |
| 576 | { |
| 577 | char *close_line = "</svg>\n"; |
| 578 | |
| 579 | write(fd, close_line, strlen(close_line)); |
| 580 | } |
| 581 | |
| 582 | int close_plot(struct plot *plot) |
| 583 | { |
| 584 | close_svg(plot->fd); |
| 585 | plot->start_y_offset += plot->total_height; |
| 586 | plot->add_xlabel = 0; |
| 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | struct plot *alloc_plot(void) |
| 591 | { |
| 592 | struct plot *plot; |
| 593 | plot = calloc(1, sizeof(*plot)); |
| 594 | if (!plot) { |
| 595 | fprintf(stderr, "Unable to allocate memory %s\n", strerror(errno)); |
| 596 | exit(1); |
| 597 | } |
| 598 | plot->fd = 0; |
| 599 | return plot; |
| 600 | } |
| 601 | |
| 602 | int close_plot_file(struct plot *plot) |
| 603 | { |
| 604 | int ret; |
| 605 | ret = lseek(plot->fd, 0, SEEK_SET); |
| 606 | if (ret == (off_t)-1) { |
| 607 | perror("seek"); |
| 608 | exit(1); |
| 609 | } |
| 610 | final_width = ((final_width + 1) / 2) * 2; |
| 611 | final_height = ((final_height + 1) / 2) * 2; |
| 612 | snprintf(line, line_len, "<svg xmlns=\"http://www.w3.org/2000/svg\" " |
| 613 | "width=\"%d\" height=\"%d\">\n", |
| 614 | final_width, final_height); |
| 615 | write(plot->fd, line, strlen(line)); |
| 616 | close(plot->fd); |
| 617 | plot->fd = 0; |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | void set_plot_output(struct plot *plot, char *filename) |
| 622 | { |
| 623 | int fd; |
| 624 | |
| 625 | if (plot->fd) |
| 626 | close_plot_file(plot); |
| 627 | fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600); |
| 628 | if (fd < 0) { |
| 629 | fprintf(stderr, "Unable to open output file %s err %s\n", filename, strerror(errno)); |
| 630 | exit(1); |
| 631 | } |
| 632 | plot->fd = fd; |
| 633 | plot->start_y_offset = plot->start_x_offset = 0; |
| 634 | write_svg_header(fd); |
| 635 | } |
| 636 | |
| 637 | char *byte_unit_names[] = { "", "K", "M", "G", "T", "P", "E", "Z", "Y", "unobtainium" }; |
| 638 | int MAX_BYTE_UNIT_SCALE = 9; |
| 639 | |
| 640 | char *time_unit_names[] = { "n", "u", "m", "s" }; |
| 641 | int MAX_TIME_UNIT_SCALE = 3; |
| 642 | |
| 643 | void scale_line_graph_bytes(u64 *max, char **units, u64 factor) |
| 644 | { |
| 645 | int scale = 0; |
| 646 | u64 val = *max; |
| 647 | u64 div = 1; |
| 648 | while (val > factor * 64) { |
| 649 | val /= factor; |
| 650 | scale++; |
| 651 | div *= factor; |
| 652 | } |
| 653 | *units = byte_unit_names[scale]; |
| 654 | if (scale == 0) |
| 655 | return; |
| 656 | |
| 657 | if (scale > MAX_BYTE_UNIT_SCALE) |
| 658 | scale = MAX_BYTE_UNIT_SCALE; |
| 659 | |
| 660 | *max /= div; |
| 661 | } |
| 662 | |
| 663 | void scale_line_graph_time(u64 *max, char **units) |
| 664 | { |
| 665 | int scale = 0; |
| 666 | u64 val = *max; |
| 667 | u64 div = 1; |
| 668 | while (val > 1000 * 10) { |
| 669 | val /= 1000; |
| 670 | scale++; |
| 671 | div *= 1000; |
| 672 | if (scale == MAX_TIME_UNIT_SCALE) |
| 673 | break; |
| 674 | } |
| 675 | *units = time_unit_names[scale]; |
| 676 | if (scale == 0) |
| 677 | return; |
| 678 | |
| 679 | *max /= div; |
| 680 | } |
| 681 | |
| 682 | int svg_line_graph(struct plot *plot, struct graph_line_data *gld, char *color, int thresh1, int thresh2) |
| 683 | { |
| 684 | int i; |
| 685 | double val; |
| 686 | double avg; |
| 687 | int rolling; |
| 688 | int fd = plot->fd; |
| 689 | char *start = "<path d=\""; |
| 690 | double yscale = ((double)gld->max) / graph_height; |
| 691 | double xscale = (double)(gld->seconds - 1) / graph_width; |
| 692 | char c = 'M'; |
| 693 | double x; |
| 694 | int printed_header = 0; |
| 695 | int printed_lines = 0; |
| 696 | |
| 697 | if (thresh1 && thresh2) |
| 698 | rolling = 0; |
| 699 | else if (rolling_avg_secs) |
| 700 | rolling = rolling_avg_secs; |
| 701 | else |
| 702 | rolling = gld->stop_seconds / 25; |
| 703 | |
| 704 | for (i = 0; i < gld->stop_seconds; i++) { |
| 705 | avg = rolling_avg(gld->data, i, rolling); |
| 706 | if (yscale == 0) |
| 707 | val = 0; |
| 708 | else |
| 709 | val = avg / yscale; |
| 710 | |
| 711 | if (val > graph_height) |
| 712 | val = graph_height; |
| 713 | if (val < 0) |
| 714 | val = 0; |
| 715 | |
| 716 | x = (double)i / xscale; |
| 717 | if (!thresh1 && !thresh2) { |
| 718 | |
| 719 | if (!printed_header) { |
| 720 | write(fd, start, strlen(start)); |
| 721 | printed_header = 1; |
| 722 | } |
| 723 | |
| 724 | /* in full line mode, everything in the graph is connected */ |
| 725 | snprintf(line, line_len, "%c %d %d ", c, axis_x_off(x), axis_y_off(val)); |
| 726 | c = 'L'; |
| 727 | write(fd, line, strlen(line)); |
| 728 | printed_lines = 1; |
| 729 | } else if (avg > thresh1 || avg > thresh2) { |
| 730 | int len = 10; |
| 731 | if (!printed_header) { |
| 732 | write(fd, start, strlen(start)); |
| 733 | printed_header = 1; |
| 734 | } |
| 735 | |
| 736 | /* otherwise, we just print a bar up there to show this one data point */ |
| 737 | if (i >= gld->stop_seconds - 2) |
| 738 | len = -10; |
| 739 | |
| 740 | /* |
| 741 | * we don't use the rolling averages here to show high |
| 742 | * points in the data |
| 743 | */ |
| 744 | snprintf(line, line_len, "M %d %d h %d ", axis_x_off(x), |
| 745 | axis_y_off(val), len); |
| 746 | write(fd, line, strlen(line)); |
| 747 | printed_lines = 1; |
| 748 | } |
| 749 | |
| 750 | } |
| 751 | if (printed_lines) { |
| 752 | snprintf(line, line_len, "\" fill=\"none\" stroke=\"%s\" stroke-width=\"2\"/>\n", color); |
| 753 | write(fd, line, strlen(line)); |
| 754 | } |
| 755 | |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | void svg_write_time_line(struct plot *plot, int col) |
| 760 | { |
| 761 | snprintf(line, line_len, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" " |
| 762 | "style=\"stroke:black;stroke-width:2;\"/>\n", |
| 763 | axis_x_off(col), axis_y_off(0), |
| 764 | axis_x_off(col), axis_y_off(graph_height)); |
| 765 | write(plot->fd, line, strlen(line)); |
| 766 | } |
| 767 | |
| 768 | static int svg_add_io(int fd, double row, double col, double width, double height, char *color) |
| 769 | { |
| 770 | float rx = 0; |
| 771 | |
| 772 | snprintf(line, line_len, "<rect x=\"%.2f\" y=\"%.2f\" width=\"%.1f\" height=\"%.1f\" " |
| 773 | "rx=\"%.2f\" style=\"stroke:none;fill:%s;stroke-width:0\"/>\n", |
| 774 | axis_x_off_double(col), axis_y_off_double(row), width, height, rx, color); |
| 775 | return write(fd, line, strlen(line)); |
| 776 | } |
| 777 | |
| 778 | int svg_io_graph_movie_array(struct plot *plot, struct plot_history *ph) |
| 779 | { |
| 780 | double cell_index; |
| 781 | double movie_row; |
| 782 | double movie_col; |
| 783 | int i; |
| 784 | |
| 785 | for (i = 0; i < ph->num_used; i++) { |
| 786 | cell_index = ph->history[i]; |
| 787 | movie_row = floor(cell_index / graph_width); |
| 788 | movie_col = cell_index - movie_row * graph_width; |
| 789 | svg_add_io(plot->fd, movie_row, movie_col, 4, 4, ph->color); |
| 790 | } |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | static float spindle_steps = 0; |
| 795 | |
| 796 | void rewind_spindle_steps(int num) |
| 797 | { |
| 798 | spindle_steps -= num * 0.01; |
| 799 | } |
| 800 | |
| 801 | int svg_io_graph_movie_array_spindle(struct plot *plot, struct plot_history *ph) |
| 802 | { |
| 803 | double cell_index; |
| 804 | int i; |
| 805 | int num_circles = 0; |
| 806 | double cells_per_circle; |
| 807 | double circle_num; |
| 808 | double degrees_per_cell; |
| 809 | double rot; |
| 810 | double center_x; |
| 811 | double center_y; |
| 812 | double graph_width_extra = graph_width + graph_circle_extra; |
| 813 | double graph_height_extra = graph_height + graph_circle_extra; |
| 814 | double radius;; |
| 815 | |
| 816 | if (graph_width_extra > graph_height_extra) |
| 817 | graph_width_extra = graph_height_extra; |
| 818 | |
| 819 | if (graph_width_extra < graph_height_extra) |
| 820 | graph_height_extra = graph_width_extra; |
| 821 | |
| 822 | radius = graph_width_extra; |
| 823 | |
| 824 | center_x = axis_x_off_double(graph_width_extra / 2); |
| 825 | center_y = axis_y_off_double(graph_height_extra / 2); |
| 826 | |
| 827 | snprintf(line, line_len, "<g transform=\"rotate(%.4f, %.2f, %.2f)\"> " |
| 828 | "<circle cx=\"%.2f\" cy=\"%.2f\" " |
| 829 | "stroke=\"black\" stroke-width=\"6\" " |
| 830 | "r=\"%.2f\" fill=\"none\"/>\n", |
| 831 | -spindle_steps * 1.2, center_x, center_y, center_x, center_y, graph_width_extra / 2); |
| 832 | write(plot->fd, line, strlen(line)); |
| 833 | snprintf(line, line_len, "<circle cx=\"%.2f\" cy=\"%.2f\" " |
| 834 | "stroke=\"none\" fill=\"red\" r=\"%.2f\"/>\n</g>\n", |
| 835 | axis_x_off_double(graph_width_extra), center_y, 4.5); |
| 836 | write(plot->fd, line, strlen(line)); |
| 837 | spindle_steps += 0.01; |
| 838 | |
| 839 | radius = floor(radius / 2); |
| 840 | num_circles = radius / 4 - 3; |
| 841 | cells_per_circle = ph->history_max / num_circles; |
| 842 | degrees_per_cell = 360 / cells_per_circle; |
| 843 | |
| 844 | for (i = 0; i < ph->num_used; i++) { |
| 845 | cell_index = ph->history[i]; |
| 846 | circle_num = floor(cell_index / cells_per_circle); |
| 847 | rot = cell_index - circle_num * cells_per_circle; |
| 848 | circle_num = num_circles - circle_num; |
| 849 | radius = circle_num * 4; |
| 850 | |
| 851 | rot = rot * degrees_per_cell; |
| 852 | rot -= spindle_steps; |
| 853 | snprintf(line, line_len, "<path transform=\"rotate(%.4f, %.2f, %.2f)\" " |
| 854 | "d=\"M %.2f %.2f a %.2f %.2f 0 0 1 0 5\" " |
| 855 | "stroke=\"%s\" stroke-width=\"4\"/>\n", |
| 856 | rot, center_x, center_y, |
| 857 | axis_x_off_double(graph_width_extra / 2 + radius) + 8, center_y, |
| 858 | radius, radius, ph->color); |
| 859 | |
| 860 | write(plot->fd, line, strlen(line)); |
| 861 | } |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | static int add_plot_history(struct plot_history *ph, double val) |
| 866 | { |
| 867 | if (ph->num_used == ph->history_len) { |
| 868 | ph->history = realloc(ph->history, |
| 869 | (ph->history_len + 4096) * sizeof(double)); |
| 870 | if (!ph->history) { |
| 871 | perror("Unable to allocate memory"); |
| 872 | exit(1); |
| 873 | } |
| 874 | ph->history_len += 4096; |
| 875 | } |
| 876 | ph->history[ph->num_used++] = val; |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | int svg_io_graph_movie(struct graph_dot_data *gdd, struct plot_history *ph, int col) |
| 881 | { |
| 882 | int row = 0; |
| 883 | int arr_index; |
| 884 | unsigned char val; |
| 885 | int bit_index; |
| 886 | int bit_mod; |
| 887 | double blocks_per_row = gdd->max_offset / gdd->rows; |
| 888 | double movie_blocks_per_cell = gdd->max_offset / (graph_width * graph_height); |
| 889 | double cell_index; |
| 890 | int margin_orig = graph_inner_y_margin; |
| 891 | |
| 892 | graph_inner_y_margin += 5; |
| 893 | ph->history_max = gdd->max_offset / movie_blocks_per_cell; |
| 894 | |
| 895 | for (row = gdd->rows - 1; row >= 0; row--) { |
| 896 | bit_index = row * gdd->cols + col; |
| 897 | arr_index = bit_index / 8; |
| 898 | bit_mod = bit_index % 8; |
| 899 | |
| 900 | if (arr_index < 0) |
| 901 | continue; |
| 902 | val = gdd->data[arr_index]; |
| 903 | if (val & (1 << bit_mod)) { |
| 904 | /* in bytes, linear offset from the start of the drive */ |
| 905 | cell_index = (double)row * blocks_per_row; |
| 906 | |
| 907 | /* a cell number in the graph */ |
| 908 | cell_index /= movie_blocks_per_cell; |
| 909 | |
| 910 | add_plot_history(ph, cell_index); |
| 911 | } |
| 912 | } |
| 913 | graph_inner_y_margin = margin_orig; |
| 914 | return 0; |
| 915 | } |
| 916 | |
| 917 | int svg_io_graph(struct plot *plot, struct graph_dot_data *gdd, char *color) |
| 918 | { |
| 919 | int fd = plot->fd;; |
| 920 | int col = 0; |
| 921 | int row = 0; |
| 922 | int arr_index; |
| 923 | unsigned char val; |
| 924 | int bit_index; |
| 925 | int bit_mod; |
| 926 | |
| 927 | for (row = gdd->rows - 1; row >= 0; row--) { |
| 928 | for (col = 0; col < gdd->cols; col++) { |
| 929 | bit_index = row * gdd->cols + col; |
| 930 | arr_index = bit_index / 8; |
| 931 | bit_mod = bit_index % 8; |
| 932 | |
| 933 | if (arr_index < 0) |
| 934 | continue; |
| 935 | val = gdd->data[arr_index]; |
| 936 | if (val & (1 << bit_mod)) |
| 937 | svg_add_io(fd, floor(row / io_graph_scale), col, 1.5, 1.5, color); |
| 938 | } |
| 939 | } |
| 940 | return 0; |
| 941 | } |
| 942 | |
| 943 | void svg_alloc_legend(struct plot *plot, int num_lines) |
| 944 | { |
| 945 | char **lines = calloc(num_lines, sizeof(char *)); |
| 946 | plot->legend_index = 0; |
| 947 | plot->legend_lines = lines; |
| 948 | plot->num_legend_lines = num_lines; |
| 949 | } |
| 950 | |
| 951 | void svg_free_legend(struct plot *plot) |
| 952 | { |
| 953 | int i; |
| 954 | for (i = 0; i < plot->legend_index; i++) |
| 955 | free(plot->legend_lines[i]); |
| 956 | free(plot->legend_lines); |
| 957 | plot->legend_lines = NULL; |
| 958 | plot->legend_index = 0; |
| 959 | } |
| 960 | |
| 961 | void svg_write_legend(struct plot *plot) |
| 962 | { |
| 963 | int legend_line_x = axis_x_off(graph_width) + legend_x_off; |
| 964 | int legend_line_y = axis_y_off(graph_height) + legend_y_off; |
| 965 | int i; |
| 966 | |
| 967 | if (plot->legend_index == 0) |
| 968 | return; |
| 969 | |
| 970 | snprintf(line, line_len, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" " |
| 971 | "fill=\"white\" filter=\"url(#shadow)\"/>\n", |
| 972 | legend_line_x - 15, |
| 973 | legend_line_y - 12, |
| 974 | legend_width, |
| 975 | plot->legend_index * legend_font_size + legend_font_size / 2 + 12); |
| 976 | |
| 977 | write(plot->fd, line, strlen(line)); |
| 978 | for (i = 0; i < plot->legend_index; i++) { |
| 979 | write(plot->fd, plot->legend_lines[i], |
| 980 | strlen(plot->legend_lines[i])); |
| 981 | free(plot->legend_lines[i]); |
| 982 | } |
| 983 | free(plot->legend_lines); |
| 984 | plot->legend_lines = NULL; |
| 985 | plot->legend_index = 0; |
| 986 | } |
| 987 | |
| 988 | void svg_add_legend(struct plot *plot, char *text, char *extra, char *color) |
| 989 | { |
| 990 | int legend_line_x = axis_x_off(graph_width) + legend_x_off; |
| 991 | int legend_line_y = axis_y_off(graph_height) + legend_y_off; |
| 992 | |
| 993 | if (!text && (!extra || strlen(extra) == 0)) |
| 994 | return; |
| 995 | |
| 996 | legend_line_y += plot->legend_index * legend_font_size + legend_font_size / 2; |
| 997 | snprintf(line, line_len, "<path d=\"M %d %d h 8\" stroke=\"%s\" stroke-width=\"8\" " |
| 998 | "filter=\"url(#labelshadow)\"/> " |
| 999 | "<text x=\"%d\" y=\"%d\" font-family=\"%s\" font-size=\"%d\" " |
| 1000 | "fill=\"black\" style=\"text-anchor: left\">%s%s</text>\n", |
| 1001 | legend_line_x, legend_line_y, |
| 1002 | color, legend_line_x + 13, |
| 1003 | legend_line_y + 4, font_family, legend_font_size, |
| 1004 | text, extra); |
| 1005 | |
| 1006 | plot->legend_lines[plot->legend_index++] = strdup(line); |
| 1007 | } |
| 1008 | |
| 1009 | void set_legend_width(int longest_str) |
| 1010 | { |
| 1011 | if (longest_str) |
| 1012 | legend_width = longest_str * (legend_font_size * 3 / 4) + 25; |
| 1013 | else |
| 1014 | legend_width = 0; |
| 1015 | } |
| 1016 | |
| 1017 | void set_rolling_avg(int rolling) |
| 1018 | { |
| 1019 | rolling_avg_secs = rolling; |
| 1020 | } |
| 1021 | |
| 1022 | void set_io_graph_scale(int scale) |
| 1023 | { |
| 1024 | io_graph_scale = scale; |
| 1025 | } |
| 1026 | |
| 1027 | void set_graph_size(int width, int height) |
| 1028 | { |
| 1029 | graph_width = width; |
| 1030 | graph_height = height; |
| 1031 | } |
| 1032 | |
| 1033 | void get_graph_size(int *width, int *height) |
| 1034 | { |
| 1035 | *width = graph_width; |
| 1036 | *height = graph_height; |
| 1037 | } |
| 1038 | |
| 1039 | void set_graph_height(int h) |
| 1040 | { |
| 1041 | graph_height = h; |
| 1042 | } |
| 1043 | void set_graph_width(int w) |
| 1044 | { |
| 1045 | graph_width = w; |
| 1046 | } |