1 /* 2 * gfio - gui front end for fio - the flexible io tester 3 * 4 * Copyright (C) 2012 Stephen M. Cameron <stephenmcameron (at) gmail.com> 5 * 6 * The license below covers all files distributed with fio unless otherwise 7 * noted in the file itself. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 #include <string.h> 24 #include <malloc.h> 25 #include <math.h> 26 #include <assert.h> 27 #include <stdlib.h> 28 29 #include <cairo.h> 30 #include <gtk/gtk.h> 31 32 #include "tickmarks.h" 33 #include "graph.h" 34 #include "flist.h" 35 #include "lib/prio_tree.h" 36 #include "cairo_text_helpers.h" 37 38 /* 39 * Allowable difference to show tooltip 40 */ 41 #define TOOLTIP_DELTA 0.08 42 43 struct xyvalue { 44 double x, y; 45 }; 46 47 enum { 48 GV_F_ON_PRIO = 1, 49 GV_F_PRIO_SKIP = 2, 50 }; 51 52 struct graph_value { 53 struct flist_head list; 54 struct prio_tree_node node; 55 struct flist_head alias; 56 unsigned int flags; 57 char *tooltip; 58 void *value; 59 }; 60 61 struct graph_label { 62 struct flist_head list; 63 char *label; 64 struct flist_head value_list; 65 struct prio_tree_root prio_tree; 66 double r, g, b; 67 int hide; 68 int value_count; 69 struct graph *parent; 70 }; 71 72 struct tick_value { 73 unsigned int offset; 74 double value; 75 }; 76 77 struct graph { 78 char *title; 79 char *xtitle; 80 char *ytitle; 81 unsigned int xdim, ydim; 82 double xoffset, yoffset; 83 struct flist_head label_list; 84 int per_label_limit; 85 const char *font; 86 graph_axis_unit_change_callback x_axis_unit_change_callback; 87 graph_axis_unit_change_callback y_axis_unit_change_callback; 88 unsigned int base_offset; 89 unsigned int dont_graph_all_zeroes; 90 double left_extra; 91 double right_extra; 92 double top_extra; 93 double bottom_extra; 94 95 double xtick_zero; 96 double xtick_delta; 97 double xtick_zero_val; 98 double xtick_one_val; 99 double ytick_zero; 100 double ytick_delta; 101 double ytick_zero_val; 102 double ytick_one_val; 103 }; 104 105 void graph_set_size(struct graph *g, unsigned int xdim, unsigned int ydim) 106 { 107 g->xdim = xdim; 108 g->ydim = ydim; 109 } 110 111 void graph_set_position(struct graph *g, double xoffset, double yoffset) 112 { 113 g->xoffset = xoffset; 114 g->yoffset = yoffset; 115 } 116 117 struct graph *graph_new(unsigned int xdim, unsigned int ydim, const char *font) 118 { 119 struct graph *g; 120 121 g = calloc(1, sizeof(*g)); 122 INIT_FLIST_HEAD(&g->label_list); 123 graph_set_size(g, xdim, ydim); 124 g->per_label_limit = -1; 125 g->font = font; 126 if (!g->font) 127 g->font = GRAPH_DEFAULT_FONT; 128 return g; 129 } 130 131 void graph_set_font(struct graph *g, const char *font) 132 { 133 g->font = font; 134 } 135 136 void graph_x_axis_unit_change_notify(struct graph *g, graph_axis_unit_change_callback f) 137 { 138 g->x_axis_unit_change_callback = f; 139 } 140 141 void graph_y_axis_unit_change_notify(struct graph *g, graph_axis_unit_change_callback f) 142 { 143 g->y_axis_unit_change_callback = f; 144 } 145 146 static int count_labels(struct graph *g) 147 { 148 struct flist_head *entry; 149 int count = 0; 150 151 flist_for_each(entry, &g->label_list) 152 count++; 153 154 return count; 155 } 156 157 static int count_values(struct graph_label *l) 158 { 159 struct flist_head *entry; 160 int count = 0; 161 162 flist_for_each(entry, &l->value_list) 163 count++; 164 165 return count; 166 } 167 168 typedef double (*double_comparator)(double a, double b); 169 170 static double mindouble(double a, double b) 171 { 172 return a < b ? a : b; 173 } 174 175 static double maxdouble(double a, double b) 176 { 177 return a < b ? b : a; 178 } 179 180 static double find_double_values(struct graph_label *l, double_comparator cmp) 181 { 182 struct flist_head *entry; 183 double answer = 0.0, tmp; 184 int first = 1; 185 186 if (flist_empty(&l->value_list)) 187 return 0.0; 188 189 flist_for_each(entry, &l->value_list) { 190 struct graph_value *i; 191 192 i = flist_entry(entry, struct graph_value, list); 193 tmp = *(double *) i->value; 194 if (first) { 195 answer = tmp; 196 first = 0; 197 } else { 198 answer = cmp(answer, tmp); 199 } 200 } 201 return answer; 202 } 203 204 static double find_double_data(struct graph *g, double_comparator cmp) 205 { 206 struct flist_head *entry; 207 struct graph_label *i; 208 int first = 1; 209 double answer, tmp; 210 211 if (flist_empty(&g->label_list)) 212 return 0.0; 213 214 flist_for_each(entry, &g->label_list) { 215 i = flist_entry(entry, struct graph_label, list); 216 tmp = find_double_values(i, cmp); 217 if (first) { 218 answer = tmp; 219 first = 0; 220 } else { 221 answer = cmp(tmp, answer); 222 } 223 } 224 return answer; 225 } 226 227 static double find_min_data(struct graph *g) 228 { 229 return find_double_data(g, mindouble); 230 } 231 232 static double find_max_data(struct graph *g) 233 { 234 return find_double_data(g, maxdouble); 235 } 236 237 static void draw_bars(struct graph *bg, cairo_t *cr, struct graph_label *lb, 238 double label_offset, double bar_width, 239 double mindata, double maxdata) 240 { 241 struct flist_head *entry; 242 double x1, y1, x2, y2; 243 int bar_num = 0; 244 double domain, range, v; 245 246 domain = (maxdata - mindata); 247 range = (double) bg->ydim * 0.80; /* FIXME */ 248 cairo_stroke(cr); 249 flist_for_each(entry, &lb->value_list) { 250 struct graph_value *i; 251 252 i = flist_entry(entry, struct graph_value, list); 253 254 x1 = label_offset + (double) bar_num * bar_width + (bar_width * 0.05); 255 x2 = x1 + bar_width * 0.90; 256 y2 = bg->ydim * 0.90; 257 v = *(double *) i->value; 258 y1 = y2 - (((v - mindata) / domain) * range); 259 cairo_move_to(cr, x1, y1); 260 cairo_line_to(cr, x1, y2); 261 cairo_line_to(cr, x2, y2); 262 cairo_line_to(cr, x2, y1); 263 cairo_close_path(cr); 264 cairo_fill(cr); 265 cairo_stroke(cr); 266 bar_num++; 267 } 268 } 269 270 static void graph_draw_common(struct graph *g, cairo_t *cr, double *x1, 271 double *y1, double *x2, double *y2) 272 { 273 const double shade_col[3][3] = { { 0.55, 0.54, 0.54 }, 274 { 0.80, 0.78, 0.78 }, 275 { 0.93, 0.91, 0.91 } }; 276 int i; 277 278 *x1 = 0.10 * g->xdim; 279 *x2 = 0.95 * g->xdim; 280 *y1 = 0.10 * g->ydim; 281 *y2 = 0.90 * g->ydim; 282 283 /* 284 * Add shade 285 */ 286 cairo_set_line_width(cr, 1.0); 287 for (i = 0; i < 3; i++) { 288 float offset = i + 1.0; 289 290 cairo_set_source_rgb(cr, shade_col[i][0], shade_col[i][1], shade_col[i][2]); 291 cairo_move_to(cr, offset + *x1, *y1 - offset); 292 cairo_line_to(cr, *x2 + offset, *y1 - offset); 293 cairo_line_to(cr, *x2 + offset, *y2 - offset); 294 cairo_stroke(cr); 295 } 296 297 cairo_set_source_rgb(cr, 0, 0, 0); 298 cairo_set_line_width(cr, 1.2); 299 300 cairo_move_to(cr, *x1, *y1); 301 cairo_line_to(cr, *x1, *y2); 302 cairo_line_to(cr, *x2, *y2); 303 cairo_line_to(cr, *x2, *y1); 304 cairo_line_to(cr, *x1, *y1); 305 cairo_stroke(cr); 306 307 draw_centered_text(cr, g->font, g->xdim / 2, g->ydim / 20, 20.0, g->title); 308 draw_centered_text(cr, g->font, g->xdim / 2, g->ydim * 0.97, 14.0, g->xtitle); 309 draw_vertical_centered_text(cr, g->font, g->xdim * 0.02, g->ydim / 2, 14.0, g->ytitle); 310 cairo_stroke(cr); 311 } 312 313 static void graph_draw_x_ticks(struct graph *g, cairo_t *cr, 314 double x1, double y1, double x2, double y2, 315 double minx, double maxx, int nticks, int add_tm_text) 316 { 317 struct tickmark *tm; 318 double tx; 319 int i, power_of_ten; 320 static double dash[] = { 1.0, 2.0 }; 321 322 nticks = calc_tickmarks(minx, maxx, nticks, &tm, &power_of_ten, 323 g->x_axis_unit_change_callback == NULL, g->base_offset); 324 if (g->x_axis_unit_change_callback) 325 g->x_axis_unit_change_callback(g, power_of_ten); 326 327 for (i = 0; i < nticks; i++) { 328 tx = (((tm[i].value) - minx) / (maxx - minx)) * (x2 - x1) + x1; 329 330 /* 331 * Update tick delta 332 */ 333 if (!i) { 334 g->xtick_zero = tx; 335 g->xtick_zero_val = tm[0].value; 336 } else if (i == 1) { 337 g->xtick_delta = (tm[1].value - tm[0].value) / (tx - g->xtick_zero); 338 g->xtick_one_val = tm[1].value; 339 } 340 341 /* really tx < yx || tx > x2, but protect against rounding */ 342 if (x1 - tx > 0.01 || tx - x2 > 0.01) 343 continue; 344 345 /* Draw tick mark */ 346 cairo_set_line_width(cr, 1.0); 347 cairo_move_to(cr, tx, y2); 348 cairo_line_to(cr, tx, y2 + (y2 - y1) * 0.03); 349 cairo_stroke(cr); 350 351 /* draw grid lines */ 352 cairo_save(cr); 353 cairo_set_dash(cr, dash, 2, 0.66); 354 cairo_set_line_width(cr, 0.33); 355 cairo_move_to(cr, tx, y1); 356 cairo_line_to(cr, tx, y2); 357 cairo_stroke(cr); 358 cairo_restore(cr); 359 360 if (!add_tm_text) 361 continue; 362 363 /* draw tickmark label */ 364 draw_centered_text(cr, g->font, tx, y2 * 1.04, 12.0, tm[i].string); 365 cairo_stroke(cr); 366 } 367 } 368 369 static double graph_draw_y_ticks(struct graph *g, cairo_t *cr, 370 double x1, double y1, double x2, double y2, 371 double miny, double maxy, int nticks, int add_tm_text) 372 { 373 struct tickmark *tm; 374 double ty; 375 int i, power_of_ten; 376 static double dash[] = { 1.0, 2.0 }; 377 378 nticks = calc_tickmarks(miny, maxy, nticks, &tm, &power_of_ten, 379 g->y_axis_unit_change_callback == NULL, g->base_offset); 380 if (g->y_axis_unit_change_callback) 381 g->y_axis_unit_change_callback(g, power_of_ten); 382 383 /* 384 * Use highest tickmark as top of graph, not highest value. Otherwise 385 * it's impossible to see what the max value is, if the graph is 386 * fairly flat. 387 */ 388 maxy = tm[nticks - 1].value; 389 390 for (i = 0; i < nticks; i++) { 391 ty = y2 - (((tm[i].value) - miny) / (maxy - miny)) * (y2 - y1); 392 393 /* 394 * Update tick delta 395 */ 396 if (!i) { 397 g->ytick_zero = ty; 398 g->ytick_zero_val = tm[0].value; 399 } else if (i == 1) { 400 g->ytick_delta = (tm[1].value - tm[0].value) / (ty - g->ytick_zero); 401 g->ytick_one_val = tm[1].value; 402 } 403 404 /* really ty < y1 || ty > y2, but protect against rounding */ 405 if (y1 - ty > 0.01 || ty - y2 > 0.01) 406 continue; 407 408 /* draw tick mark */ 409 cairo_move_to(cr, x1, ty); 410 cairo_line_to(cr, x1 - (x2 - x1) * 0.02, ty); 411 cairo_stroke(cr); 412 413 /* draw grid lines */ 414 cairo_save(cr); 415 cairo_set_dash(cr, dash, 2, 0.66); 416 cairo_set_line_width(cr, 0.33); 417 cairo_move_to(cr, x1, ty); 418 cairo_line_to(cr, x2, ty); 419 cairo_stroke(cr); 420 cairo_restore(cr); 421 422 if (!add_tm_text) 423 continue; 424 425 /* draw tickmark label */ 426 draw_right_justified_text(cr, g->font, x1 - (x2 - x1) * 0.025, ty, 12.0, tm[i].string); 427 cairo_stroke(cr); 428 } 429 430 /* 431 * Return new max to use 432 */ 433 return maxy; 434 } 435 436 void bar_graph_draw(struct graph *bg, cairo_t *cr) 437 { 438 double x1, y1, x2, y2; 439 double space_per_label, bar_width; 440 double label_offset, mindata, maxdata; 441 int i, nlabels; 442 struct graph_label *lb; 443 struct flist_head *entry; 444 445 cairo_save(cr); 446 cairo_translate(cr, bg->xoffset, bg->yoffset); 447 graph_draw_common(bg, cr, &x1, &y1, &x2, &y2); 448 449 nlabels = count_labels(bg); 450 space_per_label = (x2 - x1) / (double) nlabels; 451 452 /* 453 * Start bars at 0 unless we have negative values, otherwise we 454 * present a skewed picture comparing label X and X+1. 455 */ 456 mindata = find_min_data(bg); 457 if (mindata > 0) 458 mindata = 0; 459 460 maxdata = find_max_data(bg); 461 462 if (fabs(maxdata - mindata) < 1e-20) { 463 draw_centered_text(cr, bg->font, 464 x1 + (x2 - x1) / 2.0, 465 y1 + (y2 - y1) / 2.0, 20.0, "No good data"); 466 return; 467 } 468 469 maxdata = graph_draw_y_ticks(bg, cr, x1, y1, x2, y2, mindata, maxdata, 10, 1); 470 i = 0; 471 flist_for_each(entry, &bg->label_list) { 472 int nvalues; 473 474 lb = flist_entry(entry, struct graph_label, list); 475 nvalues = count_values(lb); 476 bar_width = (space_per_label - space_per_label * 0.2) / (double) nvalues; 477 label_offset = bg->xdim * 0.1 + space_per_label * (double) i + space_per_label * 0.1; 478 draw_bars(bg, cr, lb, label_offset, bar_width, mindata, maxdata); 479 // draw_centered_text(cr, label_offset + (bar_width / 2.0 + bar_width * 0.1), bg->ydim * 0.93, 480 draw_centered_text(cr, bg->font, x1 + space_per_label * (i + 0.5), bg->ydim * 0.93, 481 12.0, lb->label); 482 i++; 483 } 484 cairo_stroke(cr); 485 cairo_restore(cr); 486 } 487 488 typedef double (*xy_value_extractor)(struct graph_value *v); 489 490 static double getx(struct graph_value *v) 491 { 492 struct xyvalue *xy = v->value; 493 return xy->x; 494 } 495 496 static double gety(struct graph_value *v) 497 { 498 struct xyvalue *xy = v->value; 499 return xy->y; 500 } 501 502 static double find_xy_value(struct graph *g, xy_value_extractor getvalue, double_comparator cmp) 503 { 504 double tmp, answer = 0.0; 505 struct graph_label *i; 506 struct graph_value *j; 507 struct flist_head *jentry, *entry; 508 int first = 1; 509 510 flist_for_each(entry, &g->label_list) { 511 i = flist_entry(entry, struct graph_label, list); 512 513 flist_for_each(jentry, &i->value_list) { 514 j = flist_entry(jentry, struct graph_value, list); 515 tmp = getvalue(j); 516 if (first) { 517 first = 0; 518 answer = tmp; 519 } 520 answer = cmp(tmp, answer); 521 } 522 } 523 524 return answer; 525 } 526 527 void line_graph_draw(struct graph *g, cairo_t *cr) 528 { 529 double x1, y1, x2, y2; 530 double minx, miny, maxx, maxy, gminx, gminy, gmaxx, gmaxy; 531 double tx, ty, top_extra, bottom_extra, left_extra, right_extra; 532 struct graph_label *i; 533 struct graph_value *j; 534 int good_data = 1, first = 1; 535 struct flist_head *entry, *lentry; 536 537 cairo_save(cr); 538 cairo_translate(cr, g->xoffset, g->yoffset); 539 graph_draw_common(g, cr, &x1, &y1, &x2, &y2); 540 541 minx = find_xy_value(g, getx, mindouble); 542 maxx = find_xy_value(g, getx, maxdouble); 543 miny = find_xy_value(g, gety, mindouble); 544 545 /* 546 * Start graphs at zero, unless we have a value below. Otherwise 547 * it's hard to visually compare the read and write graph, since 548 * the lowest valued one will be the floor of the graph view. 549 */ 550 if (miny > 0) 551 miny = 0; 552 553 maxy = find_xy_value(g, gety, maxdouble); 554 555 if (fabs(maxx - minx) < 1e-20 || fabs(maxy - miny) < 1e-20) { 556 good_data = 0; 557 minx = 0.0; 558 miny = 0.0; 559 maxx = 10.0; 560 maxy = 100.0; 561 } 562 563 top_extra = 0.0; 564 bottom_extra = 0.0; 565 left_extra = 0.0; 566 right_extra = 0.0; 567 568 if (g->top_extra > 0.001) 569 top_extra = fabs(maxy - miny) * g->top_extra; 570 if (g->bottom_extra > 0.001) 571 bottom_extra = fabs(maxy - miny) * g->bottom_extra; 572 if (g->left_extra > 0.001) 573 left_extra = fabs(maxx - minx) * g->left_extra; 574 if (g->right_extra > 0.001) 575 right_extra = fabs(maxx - minx) * g->right_extra; 576 577 gminx = minx - left_extra; 578 gmaxx = maxx + right_extra; 579 gminy = miny - bottom_extra; 580 gmaxy = maxy + top_extra; 581 582 graph_draw_x_ticks(g, cr, x1, y1, x2, y2, gminx, gmaxx, 10, good_data); 583 gmaxy = graph_draw_y_ticks(g, cr, x1, y1, x2, y2, gminy, gmaxy, 10, good_data); 584 585 if (!good_data) 586 goto skip_data; 587 588 cairo_set_line_width(cr, 1.5); 589 cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND); 590 591 flist_for_each(lentry, &g->label_list) { 592 i = flist_entry(lentry, struct graph_label, list); 593 first = 1; 594 if (i->hide || i->r < 0) /* invisible data */ 595 continue; 596 597 cairo_set_source_rgb(cr, i->r, i->g, i->b); 598 flist_for_each(entry, &i->value_list) { 599 j = flist_entry(entry, struct graph_value, list); 600 tx = ((getx(j) - gminx) / (gmaxx - gminx)) * (x2 - x1) + x1; 601 ty = y2 - ((gety(j) - gminy) / (gmaxy - gminy)) * (y2 - y1); 602 if (first) { 603 cairo_move_to(cr, tx, ty); 604 first = 0; 605 } else 606 cairo_line_to(cr, tx, ty); 607 } 608 cairo_stroke(cr); 609 } 610 611 skip_data: 612 cairo_restore(cr); 613 } 614 615 static void setstring(char **str, const char *value) 616 { 617 free(*str); 618 *str = strdup(value); 619 } 620 621 void graph_title(struct graph *bg, const char *title) 622 { 623 setstring(&bg->title, title); 624 } 625 626 void graph_x_title(struct graph *bg, const char *title) 627 { 628 setstring(&bg->xtitle, title); 629 } 630 631 void graph_y_title(struct graph *bg, const char *title) 632 { 633 setstring(&bg->ytitle, title); 634 } 635 636 static struct graph_label *graph_find_label(struct graph *bg, 637 const char *label) 638 { 639 struct flist_head *entry; 640 struct graph_label *i; 641 642 flist_for_each(entry, &bg->label_list) { 643 i = flist_entry(entry, struct graph_label, list); 644 645 if (strcmp(label, i->label) == 0) 646 return i; 647 } 648 649 return NULL; 650 } 651 652 graph_label_t graph_add_label(struct graph *bg, const char *label) 653 { 654 struct graph_label *i; 655 656 i = graph_find_label(bg, label); 657 if (i) 658 return i; /* already present. */ 659 i = calloc(1, sizeof(*i)); 660 INIT_FLIST_HEAD(&i->value_list); 661 i->parent = bg; 662 setstring(&i->label, label); 663 flist_add_tail(&i->list, &bg->label_list); 664 INIT_PRIO_TREE_ROOT(&i->prio_tree); 665 return i; 666 } 667 668 static void __graph_value_drop(struct graph_label *l, struct graph_value *v) 669 { 670 flist_del_init(&v->list); 671 if (v->tooltip) 672 free(v->tooltip); 673 free(v->value); 674 free(v); 675 l->value_count--; 676 } 677 678 static void graph_value_drop(struct graph_label *l, struct graph_value *v) 679 { 680 if (v->flags & GV_F_PRIO_SKIP) { 681 __graph_value_drop(l, v); 682 return; 683 } 684 685 /* 686 * Find head, the guy that's on the prio tree 687 */ 688 while (!(v->flags & GV_F_ON_PRIO)) { 689 assert(!flist_empty(&v->alias)); 690 v = flist_first_entry(&v->alias, struct graph_value, alias); 691 } 692 693 prio_tree_remove(&l->prio_tree, &v->node); 694 695 /* 696 * Free aliases 697 */ 698 while (!flist_empty(&v->alias)) { 699 struct graph_value *a; 700 701 a = flist_first_entry(&v->alias, struct graph_value, alias); 702 flist_del_init(&a->alias); 703 704 __graph_value_drop(l, a); 705 } 706 707 __graph_value_drop(l, v); 708 } 709 710 static void graph_label_add_value(struct graph_label *i, void *value, 711 const char *tooltip) 712 { 713 struct graph *g = i->parent; 714 struct graph_value *x; 715 716 x = malloc(sizeof(*x)); 717 memset(x, 0, sizeof(*x)); 718 INIT_FLIST_HEAD(&x->alias); 719 INIT_FLIST_HEAD(&x->list); 720 flist_add_tail(&x->list, &i->value_list); 721 i->value_count++; 722 x->value = value; 723 724 if (tooltip) { 725 double xval = getx(x); 726 double minx = xval - (g->xtick_one_val * TOOLTIP_DELTA); 727 double maxx = xval + (g->xtick_one_val * TOOLTIP_DELTA); 728 struct prio_tree_node *ret; 729 730 /* 731 * use msec to avoid dropping too much precision when 732 * storing as an integer. 733 */ 734 minx = minx * 1000.0; 735 maxx = maxx * 1000.0; 736 737 INIT_PRIO_TREE_NODE(&x->node); 738 x->node.start = minx; 739 x->node.last = maxx; 740 x->tooltip = strdup(tooltip); 741 if (x->node.last == x->node.start) { 742 x->node.last += fabs(g->xtick_delta); 743 if (x->node.last == x->node.start) 744 x->node.last++; 745 } 746 747 /* 748 * If ret != &x->node, we have an alias. Since the values 749 * should be identical, we can drop it 750 */ 751 ret = prio_tree_insert(&i->prio_tree, &x->node); 752 if (ret != &x->node) { 753 struct graph_value *alias; 754 755 alias = container_of(ret, struct graph_value, node); 756 flist_add_tail(&x->alias, &alias->alias); 757 } else 758 x->flags = GV_F_ON_PRIO; 759 } else 760 x->flags = GV_F_PRIO_SKIP; 761 762 if (g->per_label_limit != -1 && 763 i->value_count > g->per_label_limit) { 764 int to_drop = 1; 765 766 /* 767 * If the limit was dynamically reduced, making us more 768 * than 1 entry ahead after adding this one, drop two 769 * entries. This will make us (eventually) reach the 770 * specified limit. 771 */ 772 if (i->value_count - g->per_label_limit >= 2) 773 to_drop = 2; 774 775 while (to_drop-- && !flist_empty(&i->value_list)) { 776 x = flist_first_entry(&i->value_list, struct graph_value, list); 777 graph_value_drop(i, x); 778 779 /* 780 * If we have aliases, we could drop > 1 above. 781 */ 782 if (i->value_count <= g->per_label_limit) 783 break; 784 } 785 } 786 } 787 788 int graph_add_data(struct graph *bg, graph_label_t label, const double value) 789 { 790 struct graph_label *i = label; 791 double *d; 792 793 d = malloc(sizeof(*d)); 794 *d = value; 795 796 graph_label_add_value(i, d, NULL); 797 return 0; 798 } 799 800 static int graph_nonzero_y(struct graph_label *l) 801 { 802 struct flist_head *entry; 803 804 flist_for_each(entry, &l->value_list) { 805 struct graph_value *v; 806 807 v = flist_entry(entry, struct graph_value, list); 808 if (gety(v) != 0.0) 809 return 1; 810 } 811 812 return 0; 813 } 814 815 int graph_add_xy_data(struct graph *bg, graph_label_t label, 816 const double x, const double y, const char *tooltip) 817 { 818 struct graph_label *i = label; 819 struct xyvalue *xy; 820 821 if (bg->dont_graph_all_zeroes && y == 0.0 && !graph_nonzero_y(i)) 822 i->hide = 1; 823 else 824 i->hide = 0; 825 826 xy = malloc(sizeof(*xy)); 827 xy->x = x; 828 xy->y = y; 829 830 graph_label_add_value(i, xy, tooltip); 831 return 0; 832 } 833 834 static void graph_free_values(struct graph_label *l) 835 { 836 struct graph_value *i; 837 838 while (!flist_empty(&l->value_list)) { 839 i = flist_first_entry(&l->value_list, struct graph_value, list); 840 graph_value_drop(l, i); 841 } 842 } 843 844 static void graph_free_labels(struct graph *g) 845 { 846 struct graph_label *i; 847 848 while (!flist_empty(&g->label_list)) { 849 i = flist_first_entry(&g->label_list, struct graph_label, list); 850 flist_del(&i->list); 851 graph_free_values(i); 852 free(i); 853 } 854 } 855 856 void graph_clear_values(struct graph *g) 857 { 858 struct flist_head *node; 859 struct graph_label *i; 860 861 flist_for_each(node, &g->label_list) { 862 i = flist_entry(node, struct graph_label, list); 863 graph_free_values(i); 864 } 865 } 866 867 void graph_set_color(struct graph *gr, graph_label_t label, double red, 868 double green, double blue) 869 { 870 struct graph_label *i = label; 871 double r, g, b; 872 873 if (red < 0.0) { /* invisible color */ 874 r = -1.0; 875 g = -1.0; 876 b = -1.0; 877 } else { 878 r = fabs(red); 879 g = fabs(green); 880 b = fabs(blue); 881 882 if (r > 1.0) 883 r = 1.0; 884 if (g > 1.0) 885 g = 1.0; 886 if (b > 1.0) 887 b = 1.0; 888 } 889 890 i->r = r; 891 i->g = g; 892 i->b = b; 893 } 894 895 void graph_free(struct graph *bg) 896 { 897 free(bg->title); 898 free(bg->xtitle); 899 free(bg->ytitle); 900 graph_free_labels(bg); 901 } 902 903 /* For each line in the line graph, up to per_label_limit segments may 904 * be added. After that, adding more data to the end of the line 905 * causes data to drop off of the front of the line. 906 */ 907 void line_graph_set_data_count_limit(struct graph *g, int per_label_limit) 908 { 909 g->per_label_limit = per_label_limit; 910 } 911 912 void graph_add_extra_space(struct graph *g, double left_percent, 913 double right_percent, double top_percent, 914 double bottom_percent) 915 { 916 g->left_extra = left_percent; 917 g->right_extra = right_percent; 918 g->top_extra = top_percent; 919 g->bottom_extra = bottom_percent; 920 } 921 922 /* 923 * Normally values are logged in a base unit of 0, but for other purposes 924 * it makes more sense to log in higher unit. For instance for bandwidth 925 * purposes, you may want to log in KB/sec (or MB/sec) rather than bytes/sec. 926 */ 927 void graph_set_base_offset(struct graph *g, unsigned int base_offset) 928 { 929 g->base_offset = base_offset; 930 } 931 932 int graph_has_tooltips(struct graph *g) 933 { 934 struct flist_head *entry; 935 struct graph_label *i; 936 937 flist_for_each(entry, &g->label_list) { 938 i = flist_entry(entry, struct graph_label, list); 939 940 if (!prio_tree_empty(&i->prio_tree)) 941 return 1; 942 } 943 944 return 0; 945 } 946 947 int graph_contains_xy(struct graph *g, int x, int y) 948 { 949 int first_x = g->xoffset; 950 int last_x = g->xoffset + g->xdim; 951 int first_y = g->yoffset; 952 int last_y = g->yoffset + g->ydim; 953 954 return (x >= first_x && x <= last_x) && (y >= first_y && y <= last_y); 955 } 956 957 const char *graph_find_tooltip(struct graph *g, int ix, int iy) 958 { 959 double x = ix, y = iy; 960 struct prio_tree_iter iter; 961 struct prio_tree_node *n; 962 struct graph_value *best = NULL; 963 struct flist_head *entry; 964 double best_delta; 965 double maxy, miny; 966 967 x -= g->xoffset; 968 y -= g->yoffset; 969 970 x = g->xtick_zero_val + ((x - g->xtick_zero) * g->xtick_delta); 971 y = g->ytick_zero_val + ((y - g->ytick_zero) * g->ytick_delta); 972 973 x = x * 1000.0; 974 maxy = y + (g->ytick_one_val * TOOLTIP_DELTA); 975 miny = y - (g->ytick_one_val * TOOLTIP_DELTA); 976 best_delta = UINT_MAX; 977 flist_for_each(entry, &g->label_list) { 978 struct graph_label *i; 979 980 i = flist_entry(entry, struct graph_label, list); 981 if (i->hide) 982 continue; 983 984 INIT_PRIO_TREE_ITER(&iter); 985 prio_tree_iter_init(&iter, &i->prio_tree, x, x); 986 987 n = prio_tree_next(&iter); 988 if (!n) 989 continue; 990 991 do { 992 struct graph_value *v, *rootv; 993 double yval, ydiff; 994 995 v = container_of(n, struct graph_value, node); 996 rootv = v; 997 do { 998 yval = gety(v); 999 ydiff = fabs(yval - y); 1000 1001 /* 1002 * zero delta, or within or match critera, break 1003 */ 1004 if (ydiff < best_delta) { 1005 best_delta = ydiff; 1006 if (!best_delta || 1007 (yval >= miny && yval <= maxy)) { 1008 best = v; 1009 break; 1010 } 1011 } 1012 if (!flist_empty(&v->alias)) 1013 v = flist_first_entry(&v->alias, struct graph_value, alias); 1014 } while (v != rootv); 1015 } while ((n = prio_tree_next(&iter)) != NULL); 1016 1017 /* 1018 * If we got matches in one label, don't check others. 1019 */ 1020 if (best) 1021 break; 1022 } 1023 1024 if (best) 1025 return best->tooltip; 1026 1027 return NULL; 1028 } 1029 1030 void graph_set_graph_all_zeroes(struct graph *g, unsigned int set) 1031 { 1032 g->dont_graph_all_zeroes = !set; 1033 } 1034
