summaryrefslogtreecommitdiffstats
path: root/VNFs/DPPD-PROX/display.c
blob: d7421e85dfd0bc217fab6fbc14574b504138cae9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#include <curses.h>

#include <rte_cycles.h>
#include <string.h>
#include <signal.h>
#include <math.h>
#include <signal.h>

#include "display_latency.h"
#include "display_mempools.h"
#include "display_ports.h"
#include "display_priority.h"
#include "display_irq.h"
#include "display_rings.h"
#include "display_pkt_len.h"
#include "display_l4gen.h"
#include "display_tasks.h"
#include "stats_irq.h"
#include "stats_prio_task.h"

#include "cqm.h"
#include "msr.h"
#include "display.h"
#include "log.h"
#include "commands.h"
#include "main.h"
#include "stats.h"
#include "stats_port.h"
#include "stats_latency.h"
#include "stats_global.h"
#include "stats_core.h"
#include "prox_cfg.h"
#include "prox_assert.h"
#include "version.h"
#include "quit.h"
#include "prox_port_cfg.h"

static struct screen_state screen_state = {
	.pps_unit = 1000,
	.chosen_screen = -1,
};

static struct display_screen *display_screens[16];
static struct display_screen *current_screen;
static size_t n_screens;
static size_t longest_title;

void display_set_pps_unit(int val)
{
	screen_state.pps_unit = val;
}

/* Set up the display mutex  as recursive. This enables threads to use
   display_[un]lock() to lock  the display when multiple  calls to for
   instance plog_info() need to be made. */
static pthread_mutex_t disp_mtx = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

static void stats_display_layout(uint8_t in_place);

void display_lock(void)
{
	pthread_mutex_lock(&disp_mtx);
}

void display_unlock(void)
{
	pthread_mutex_unlock(&disp_mtx);
}

/* Advanced text output */
static WINDOW *scr = NULL, *win_txt, *win_general, *win_cmd, *win_stat, *win_title, *win_tabs, *win_help;
static int win_txt_height = 1;
static int title_len;

static uint16_t max_n_lines;

static int cmd_cursor_pos;
static const char *cmd_cmd;
static int cmd_len;

/* Colors used in the interface */
enum colors {
	INVALID_COLOR,
	NO_COLOR,
	RED_ON_BLACK,
	BLACK_ON_CYAN,
	BLACK_ON_GREEN,
	BLACK_ON_WHITE,
	BLACK_ON_YELLOW,
	YELLOW_ON_BLACK,
	WHITE_ON_RED,
	YELLOW_ON_NOTHING,
	GREEN_ON_NOTHING,
	RED_ON_NOTHING,
	BLUE_ON_NOTHING,
	CYAN_ON_NOTHING,
	MAGENTA_ON_NOTHING,
	WHITE_ON_NOTHING,
};

int display_getch(void)
{
	int ret;

	display_lock();
	ret = wgetch(scr);
	display_unlock();

	return ret;
}

void display_cmd(const char *cmd, int cl, int cursor_pos)
{
	cmd_len = cl;
	if (cursor_pos == -1 || cursor_pos > cmd_len)
		cursor_pos = cmd_len;
	cmd_cursor_pos = cursor_pos;
	cmd_cmd = cmd;

	display_lock();
	werase(win_cmd);
	if (cursor_pos < cmd_len) {
		waddnstr(win_cmd, cmd, cursor_pos);
		wbkgdset(win_cmd, COLOR_PAIR(YELLOW_ON_BLACK));
		waddnstr(win_cmd, cmd + cursor_pos, 1);
		wbkgdset(win_cmd, COLOR_PAIR(BLACK_ON_YELLOW));
		waddnstr(win_cmd, cmd + cursor_pos + 1, cmd_len - (cursor_pos + 1));
	}
	else {
		waddnstr(win_cmd, cmd, cmd_len);
		wmove(win_cmd, cursor_pos, 0);
		wbkgdset(win_cmd, COLOR_PAIR(YELLOW_ON_BLACK));
		waddstr(win_cmd, " ");
		wbkgdset(win_cmd, COLOR_PAIR(BLACK_ON_YELLOW));
	}

	wattroff(win_stat, A_UNDERLINE);
	wrefresh(win_cmd);
	display_unlock();
}

static void refresh_cmd_win(void)
{
	display_cmd(cmd_cmd, cmd_len, cmd_cursor_pos);
}

static WINDOW *create_subwindow(int height, int width, int y_pos, int x_pos)
{
	WINDOW *win = subwin(scr, height, width, y_pos, x_pos);
	touchwin(scr);
	return win;
}

/* The limit parameter sets the last column that something can be
   printed. If characters would be printed _past_ the limit, the last
   character printed within the limit will be a '~' to signify that
   the string cut off. The limit parameter will be ignored if its
   value is -1 */
static inline int mvwaddstrv(WINDOW *win, int y, int x, int limit, const char *fmt, va_list ap)
{
	char buf[1024];
	int ret;

	ret = vsnprintf(buf, sizeof(buf), fmt, ap);
	int len = ret;

	wmove(win, y, x);
	if (x > COLS - 1) {
		return 0;
	}

	/* To prevent strings from wrapping, cut the string at the end
	   of the screen. */
	if (x + len > COLS) {
		buf[COLS - 1 - x] = 0;
		len = COLS - x;
	}

	if (limit != -1 && x + len > limit) {
		int new_len = limit - x;

		if (new_len < 0)
			return 0;
		buf[new_len] = '~';
		buf[new_len + 1] = 0;
	}

	waddstr(win, buf);
	return ret;
}

/* Format string capable [mv]waddstr() wrappers */
__attribute__((format(printf, 4, 5))) static inline int mvwaddstrf(WINDOW* win, int y, int x, const char *fmt, ...)
{
	int ret;
	va_list ap;

	va_start(ap, fmt);
	ret = mvwaddstrv(win, y, x, -1, fmt, ap);
	va_end(ap);
	return ret;
}

__attribute__((format(printf, 5, 6))) static inline int mvwaddstrf_limit(WINDOW* win, int y, int x, int limit, const char *fmt, ...)
{
	int ret;
	va_list ap;

	va_start(ap, fmt);
	ret = mvwaddstrv(win, y, x, limit, fmt, ap);
	va_end(ap);
	return ret;
}

// red: link down; Green: link up
static short link_color(const uint8_t if_port)
{
	return COLOR_PAIR(prox_port_cfg[if_port].link_up? GREEN_ON_NOTHING : RED_ON_NOTHING);
}

static void (*ncurses_sigwinch)(int);

static void sigwinch(int in)
{
	if (ncurses_sigwinch)
		ncurses_sigwinch(in);
	refresh();
	stats_display_layout(0);
}

static void set_signal_handler(void)
{
	struct sigaction old;

	sigaction(SIGWINCH, NULL, &old);
	ncurses_sigwinch = old.sa_handler;

	signal(SIGWINCH, sigwinch);
}

void display_column_port_ring(const struct display_column *display_column, int row, struct port_queue *ports, int port_count, struct rte_ring **rings, int ring_count)
{
	if (row >= max_n_lines)
		return;

	int pos = display_column->offset;
	int limit = pos + display_column->width;

	for (int i = 0; i < port_count && pos < limit; i++) {
		wbkgdset(win_stat, link_color(ports[i].port));
		pos += mvwaddstrf_limit(win_stat, row + 2, pos, limit, "%u", ports[i].port);
		wbkgdset(win_stat, COLOR_PAIR(NO_COLOR));

		if (i != port_count - 1)
			pos += mvwaddstrf_limit(win_stat, row + 2, pos, limit, " ");
	}

	for (uint8_t ring_id = 0; ring_id < ring_count && pos < limit; ++ring_id) {
		pos += mvwaddstrf_limit(win_stat, row + 2, pos, limit, "%s", rings[ring_id]->name);
	}
}

static void display_add_screen(struct display_screen *screen)
{
	display_screens[n_screens++] = screen;
	if (longest_title < strlen(screen->title))
		longest_title = strlen(screen->title);
}

static void display_init_screens(void)
{
	if (n_screens)
		return;

	display_add_screen(display_tasks());
	display_add_screen(display_ports());
	display_add_screen(display_mempools());
	display_add_screen(display_latency());
	display_add_screen(display_rings());
	display_add_screen(display_l4gen());
	display_add_screen(display_pkt_len());
	if (stats_get_n_prio_tasks_tot())
		display_add_screen(display_priority());
	if (stats_get_n_irq_tasks())
		display_add_screen(display_irq());
}

void display_init(void)
{
	scr = initscr();
	start_color();
	/* Assign default foreground/background colors to color number -1 */
	use_default_colors();

	init_pair(NO_COLOR,   -1,  -1);
	init_pair(RED_ON_BLACK,     COLOR_RED,  COLOR_BLACK);
	init_pair(BLACK_ON_CYAN,   COLOR_BLACK,  COLOR_CYAN);
	init_pair(BLACK_ON_GREEN,  COLOR_BLACK,  COLOR_GREEN);
	init_pair(BLACK_ON_WHITE,  COLOR_BLACK,  COLOR_WHITE);
	init_pair(BLACK_ON_YELLOW, COLOR_BLACK,  COLOR_YELLOW);
	init_pair(YELLOW_ON_BLACK, COLOR_YELLOW,  COLOR_BLACK);
	init_pair(WHITE_ON_RED,    COLOR_WHITE,  COLOR_RED);
	init_pair(YELLOW_ON_NOTHING,   COLOR_YELLOW,  -1);
	init_pair(GREEN_ON_NOTHING,   COLOR_GREEN,  -1);
	init_pair(RED_ON_NOTHING,   COLOR_RED,  -1);
	init_pair(BLUE_ON_NOTHING,  COLOR_BLUE, -1);
	init_pair(CYAN_ON_NOTHING,  COLOR_CYAN, -1);
	init_pair(MAGENTA_ON_NOTHING,  COLOR_MAGENTA, -1);
	init_pair(WHITE_ON_NOTHING,  COLOR_WHITE, -1);
	/* nodelay(scr, TRUE); */
	noecho();
	curs_set(0);
	/* Create fullscreen log window. When stats are displayed
	   later, it is recreated with appropriate dimensions. */
	win_txt = create_subwindow(0, 0, 0, 0);
	wbkgd(win_txt, COLOR_PAIR(0));

	idlok(win_txt, FALSE);
	/* Get scrolling */
	scrollok(win_txt, TRUE);
	/* Leave cursor where it was */
	leaveok(win_txt, TRUE);

	refresh();

	set_signal_handler();

	max_n_lines = (LINES - 5 - 2 - 3);
	/* core_port_height = max_n_lines < stats_get_n_tasks_tot()? max_n_lines : stats_get_n_tasks_tot(); */

	display_init_screens();
	display_screen(0);
	stats_display_layout(0);
}

static void display_page_recalc_offsets(struct display_page *display_page)
{
	struct display_table *table;
	struct display_column *col;
	int total_offset = 0;

	for (int i = 0; i < display_page->n_tables; ++i) {
		table = &display_page->tables[i];

		if (i != 0)
			total_offset += 1;
		table->offset = total_offset;
		for (int j = 0; j < table->n_cols; ++j) {
			col = &table->cols[j];
			col->offset = total_offset;
			if (j + 1 != table->n_cols)
				total_offset += 1;
			total_offset += col->width;
		}
		table->width = total_offset - table->offset;
	}
}

void display_page_init(struct display_page *display_page)
{
	struct display_table *table;
	struct display_column *col;
	int table_width = 0;
	int table_offset = 0;

	memset(display_page, 0, sizeof(*display_page));
	display_page->n_tables = 0;
	for (size_t i = 0; i < sizeof(display_page->tables)/sizeof(display_page->tables[0]); ++i) {
		table = &display_page->tables[i];
		for (size_t j = 0; j < sizeof(table->cols)/sizeof(table->cols[0]); ++j) {
			col = &table->cols[j];
			col->display_page = display_page;
		}
	}
}

struct display_table *display_page_add_table(struct display_page *display_page)
{
	struct display_table *table = &display_page->tables[display_page->n_tables];

	display_page->n_tables++;
	return table;
}

void display_table_init(struct display_table *table, const char *title)
{
	strcpy(table->title, title);
	table->n_cols = 0;
}

struct display_column *display_table_add_col(struct display_table *table)
{
	struct display_column *col = &table->cols[table->n_cols];

	table->n_cols++;
	return col;
}

void display_column_init(struct display_column *display_column, const char *title, unsigned width)
{
	if (width < strlen(title))
		width = strlen(title);

	strcpy(display_column->title, title);
	display_column->width = width;
	display_page_recalc_offsets(display_column->display_page);
}

int display_column_get_width(const struct display_column *display_column)
{
	return display_column->width;
}

void display_page_draw_frame(const struct display_page *display_page, int height)
{
	const struct display_table *table;
	const struct display_column *col;

	wattron(win_stat, A_BOLD);
	wbkgdset(win_stat, COLOR_PAIR(YELLOW_ON_NOTHING));

	for (int i = 0; i < display_page->n_tables; ++i) {
		table = &display_page->tables[i];

		if (i != 0)
			mvwvline(win_stat, 0, table->offset - 1,  ACS_VLINE, height + 2);

		mvwaddstrf(win_stat, 0, table->offset + table->width / 2 - strlen(table->title) / 2, "%s", table->title);
		for (int j = 0; j < table->n_cols; ++j) {
			col = &table->cols[j];

			if (j != 0)
				mvwvline(win_stat, 1, col->offset - 1, ACS_VLINE, height + 1);
			mvwaddstrf(win_stat, 1, col->offset + col->width / 2 - strlen(col->title) / 2, "%s", col->title);
		}

		if (i + 1 == display_page->n_tables)
			mvwvline(win_stat, 0, table->offset + table->width,  ACS_VLINE, height + 2);
	}
	wbkgdset(win_stat, COLOR_PAIR(NO_COLOR));
	wattroff(win_stat, A_BOLD);
}

void display_column_print(const struct display_column *display_column, int row, const char *fmt, ...)
{
	if (row >= max_n_lines)
		return;

	va_list ap;
	char buffer[128] = {0};
	char *to_print = buffer + 64;

	va_start(ap, fmt);
	int len = vsnprintf(to_print, sizeof(buffer) - 64, fmt, ap);
	va_end(ap);

	int offset = 0;
	/* If column is too long, add ~ at the end. If it is too
	   short, align on the right. */
	if (len > display_column->width) {
		to_print[display_column->width - 1] = '~';
		to_print[display_column->width] = '\0';
	} else {
		int diff = display_column->width - len;

		to_print += len;
		to_print -= display_column->width;
		for (int i = 0; i < diff; i++)
			to_print[i] = ' ';
	}

	mvwaddstrf(win_stat, row + 2, display_column->offset, "%s", to_print);
}

void display_column_print_core_task(const struct display_column *display_column, int row, struct lcore_cfg *lconf, struct task_args *targ)
{
	if (row >= max_n_lines)
		return;

	if (lconf->n_tasks_run == 0) {
		wattron(win_stat, A_BOLD);
		wbkgdset(win_stat, COLOR_PAIR(RED_ON_NOTHING));
	}
	if (targ->id == 0)
		mvwaddstrf(win_stat, row + 2, display_column->offset, "%2u/", lconf->id);
	if (lconf->n_tasks_run == 0) {
		wattroff(win_stat, A_BOLD);
		wbkgdset(win_stat, COLOR_PAIR(NO_COLOR));
	}
	if (!lconf_task_is_running(lconf, targ->id)) {
		wattron(win_stat, A_BOLD);
		wbkgdset(win_stat, COLOR_PAIR(RED_ON_NOTHING));
	}
	mvwaddstrf(win_stat, row + 2, display_column->offset + 3, "%1u", targ->id);
	if (!lconf_task_is_running(lconf, targ->id)) {
		wattroff(win_stat, A_BOLD);
		wbkgdset(win_stat, COLOR_PAIR(NO_COLOR));
	}
}

static void redraw_tabs(unsigned screen_id)
{
	const size_t len = longest_title + 1;

	for (size_t i = 0; i < n_screens; ++i) {
		if (i == screen_id)
			wbkgdset(win_tabs, COLOR_PAIR(BLACK_ON_GREEN));

		mvwaddstrf(win_tabs, 0, i*(len + 3), "%zu ", i+1);
		if (i != screen_id)
			wbkgdset(win_tabs, COLOR_PAIR(GREEN_ON_NOTHING));
		mvwaddstrf(win_tabs, 0, i*(len + 3) + 2, "%s", display_screens[i]->title);
		for (size_t j = strlen(display_screens[i]->title); j < len - 1; ++j)
			mvwaddstrf(win_tabs, 0, i*(len + 3) + 2 + j, " ");
		if (i != screen_id)
			wbkgdset(win_tabs, COLOR_PAIR(NO_COLOR));
		if (i == screen_id)
			wbkgdset(win_tabs, COLOR_PAIR(NO_COLOR));
	}

	wrefresh(win_tabs);
}

static void draw_title(void)
{
	char title_str[128];

	snprintf(title_str, sizeof(title_str), "%s %s: %s", PROGRAM_NAME, VERSION_STR(), prox_cfg.name);

	wbkgd(win_title, COLOR_PAIR(BLACK_ON_GREEN));
	title_len = strlen(title_str);
	mvwaddstrf(win_title, 0, (COLS - title_len)/2, "%s", title_str);

	redraw_tabs(screen_state.chosen_screen);
}

static void draw_general_frame(void)
{
	if (screen_state.toggle == 0) {
		wattron(win_general, A_BOLD);
		wbkgdset(win_general, COLOR_PAIR(MAGENTA_ON_NOTHING));
		mvwaddstrf(win_general, 0, 9, "rx:         tx:          diff:                     rx:          tx:                        %%:");
		mvwaddstrf(win_general, 1, 9, "rx:         tx:          err:                      rx:          tx:          err:          %%:");
		wbkgdset(win_general, COLOR_PAIR(NO_COLOR));

		wbkgdset(win_general, COLOR_PAIR(BLUE_ON_NOTHING));
		mvwaddstrf(win_general, 0, 0, "Host pps ");
		mvwaddstrf(win_general, 1, 0, "NICs pps ");

		wbkgdset(win_general, COLOR_PAIR(CYAN_ON_NOTHING));
		mvwaddstrf(win_general, 0, 56, "avg");
		mvwaddstrf(win_general, 1, 56, "avg");
		wbkgdset(win_general, COLOR_PAIR(NO_COLOR));
		wattroff(win_general, A_BOLD);
	} else {
		wattron(win_general, A_BOLD);
		wbkgdset(win_general, COLOR_PAIR(BLUE_ON_NOTHING));
		mvwaddstrf(win_general, 0, 9, "rx:                   tx:                   rx-tx:                      tx/rx:            rx/tx:");
		mvwaddstrf(win_general, 1, 9, "rx:                   tx:                   err:                        tx/rx:            rx/tx:");
		wbkgdset(win_general, COLOR_PAIR(NO_COLOR));

		wbkgdset(win_general, COLOR_PAIR(CYAN_ON_NOTHING));
		mvwaddstrf(win_general, 0, 0, "Host tot ");
		mvwaddstrf(win_general, 1, 0, "NICs tot ");
		wattroff(win_general, A_BOLD);
	}
}

static void draw_status_bar(void)
{
	wbkgd(win_help, COLOR_PAIR(BLACK_ON_WHITE));
	werase(win_help);
	mvwaddstrf(win_help, 0, 0,
		   "Enter 'help' or command, <ESC> or 'quit' to exit, "
		   "1-%zu to switch screens and 0 to reset stats, '=' to toggle between per-sec and total stats",
		   n_screens);
	wrefresh(win_help);
	mvwin(win_help, LINES - 1, 0);
}

static void draw_log_window(void)
{
	idlok(win_txt, FALSE);
	/* Get scrolling */
	scrollok(win_txt, TRUE);

	/* Leave cursor where it was */
	leaveok(win_txt, TRUE);
	wbkgd(win_txt, COLOR_PAIR(BLACK_ON_CYAN));
	wrefresh(win_txt);
}

static void stats_display_layout(uint8_t in_place)
{
	uint8_t cur_stats_height;

	cur_stats_height = current_screen->get_height();
	cur_stats_height = cur_stats_height > max_n_lines? max_n_lines: cur_stats_height;

	display_lock();
	if (!in_place) {
		// moving existing windows does not work
		delwin(win_txt);
		delwin(win_general);
		delwin(win_title);
		delwin(win_tabs);
		delwin(win_cmd);
		delwin(win_txt);
		delwin(win_help);

		clear();
	}

	if (!in_place) {
		win_stat = create_subwindow(cur_stats_height + 2, 0, 4, 0);
		win_tabs = create_subwindow(1, 0, 1, 0);
		win_general = create_subwindow(2, 0, 2, 0);
		win_title = create_subwindow(1, 0, 0, 0);
		win_cmd = create_subwindow(1, 0, cur_stats_height + 2 + 4,  0);
		win_txt_height = LINES - cur_stats_height - 2 - 3 - 3;
		win_txt = create_subwindow(win_txt_height, 0, cur_stats_height + 4 + 3, 0);
		win_help = create_subwindow(1, 0, LINES - 1, 0);
	}

	draw_title();
	draw_general_frame();
	/* Command line */
	wbkgd(win_cmd, COLOR_PAIR(BLACK_ON_YELLOW));
	idlok(win_cmd, FALSE);
	/* Move cursor at insertion point */
	leaveok(win_cmd, FALSE);

	draw_status_bar();
	draw_log_window();

	/* Draw everything to the screen */
	refresh();
	current_screen->draw_frame(&screen_state);
	display_unlock();

	refresh_cmd_win();
	display_stats();
}

void display_end(void)
{
	pthread_mutex_destroy(&disp_mtx);

	if (scr != NULL) {
		endwin();
	}
}

static void pps_print(WINDOW *dst_scr, int y, int x, uint64_t val, int is_blue)
{
	uint64_t rx_pps_disp = val;
	uint64_t rx_pps_disp_frac = 0;
	uint32_t ten_pow3 = 0;
	static const char *units = " KMG";
	char rx_unit = ' ';

	while (rx_pps_disp > 1000) {
		rx_pps_disp /= 1000;
		rx_pps_disp_frac = (val - rx_pps_disp*1000) / 10;
		val /= 1000;
		ten_pow3++;
	}

	if (ten_pow3 >= strlen(units)) {
		wbkgdset(dst_scr, COLOR_PAIR(RED_ON_NOTHING));
		mvwaddstrf(dst_scr, y, x, "---");
		wbkgdset(dst_scr, COLOR_PAIR(NO_COLOR));
		return;
	}

	rx_unit = units[ten_pow3];

	wattron(dst_scr, A_BOLD);
	if (is_blue) {
		wbkgdset(dst_scr, COLOR_PAIR(BLUE_ON_NOTHING));
	}
	else
		wbkgdset(dst_scr, COLOR_PAIR(CYAN_ON_NOTHING));

	mvwaddstrf(dst_scr, y, x, "%3lu", rx_pps_disp);
	if (rx_unit != ' ') {
		mvwaddstrf(dst_scr, y, x + 3, ".%02lu", rx_pps_disp_frac);
		wattroff(dst_scr, A_BOLD);
		wbkgdset(dst_scr, COLOR_PAIR(WHITE_ON_NOTHING));
		wattron(dst_scr, A_BOLD);
		mvwaddstrf(dst_scr, y, x + 6, "%c", rx_unit);
		wattroff(dst_scr, A_BOLD);
		wbkgdset(dst_scr, COLOR_PAIR(NO_COLOR));
	}
	else {
		mvwaddstrf(dst_scr, y, x + 3, "    ");
	}
	wattroff(dst_scr, A_BOLD);
	wbkgdset(dst_scr, COLOR_PAIR(NO_COLOR));
}

static void display_stats_general_per_sec(void)
{
	struct global_stats_sample *gsl = stats_get_global_stats(1);
	struct global_stats_sample *gsp = stats_get_global_stats(0);

	uint64_t rx_pps = val_to_rate(gsl->host_rx_packets - gsp->host_rx_packets, gsl->tsc - gsp->tsc);
	uint64_t tx_pps = val_to_rate(gsl->host_tx_packets - gsp->host_tx_packets, gsl->tsc - gsp->tsc);
	/* Host: RX, TX, Diff */
	pps_print(win_general, 0, 12, rx_pps, 1);
	pps_print(win_general, 0, 25, tx_pps, 1);

	uint64_t diff = 0;
	if (rx_pps > tx_pps)
		diff = rx_pps - tx_pps;
	pps_print(win_general, 0, 40, diff, 1);

	uint64_t nics_rx_pps = val_to_rate(gsl->nics_rx_packets - gsp->nics_rx_packets, gsl->tsc - gsp->tsc);
	uint64_t nics_tx_pps = val_to_rate(gsl->nics_tx_packets - gsp->nics_tx_packets, gsl->tsc - gsp->tsc);
	uint64_t nics_ierrors = val_to_rate(gsl->nics_ierrors - gsp->nics_ierrors, gsl->tsc - gsp->tsc);
	uint64_t nics_imissed = val_to_rate(gsl->nics_imissed - gsp->nics_imissed, gsl->tsc - gsp->tsc);

	/* NIC: RX, TX, Diff */
	pps_print(win_general, 1, 12, nics_rx_pps, 1);
	pps_print(win_general, 1, 25, nics_tx_pps, 1);
	pps_print(win_general, 1, 40, nics_ierrors + nics_imissed, 1);

	wbkgdset(win_general, COLOR_PAIR(CYAN_ON_NOTHING));
	wattron(win_general, A_BOLD);
	mvwaddstrf(win_general, 0, 103, "%6.2f", tx_pps > rx_pps? 100 : tx_pps * 100.0 / rx_pps);
	wattroff(win_general, A_BOLD);
	wbkgdset(win_general, COLOR_PAIR(NO_COLOR));

	struct global_stats_sample *gsb = stats_get_global_stats_beg();
	if (gsb) {
		uint64_t rx_pps = val_to_rate(gsl->host_rx_packets - gsb->host_rx_packets, gsl->tsc - gsb->tsc);
		uint64_t tx_pps = val_to_rate(gsl->host_tx_packets - gsb->host_tx_packets, gsl->tsc - gsb->tsc);

		uint64_t nics_rx_pps = val_to_rate(gsl->nics_rx_packets - gsb->nics_rx_packets, gsl->tsc - gsb->tsc);
		uint64_t nics_tx_pps = val_to_rate(gsl->nics_tx_packets - gsb->nics_tx_packets, gsl->tsc - gsb->tsc);
		uint64_t nics_ierrors = val_to_rate(gsl->nics_ierrors - gsb->nics_ierrors, gsl->tsc - gsb->tsc);
		uint64_t nics_imissed = val_to_rate(gsl->nics_imissed - gsb->nics_imissed, gsl->tsc - gsb->tsc);

		pps_print(win_general, 0, 64, rx_pps, 0);
		pps_print(win_general, 0, 77, tx_pps, 0);

		pps_print(win_general, 1, 64, nics_rx_pps, 0);
		pps_print(win_general, 1, 77, nics_tx_pps, 0);
		pps_print(win_general, 1, 91, nics_ierrors + nics_imissed, 0);

		wbkgdset(win_general, COLOR_PAIR(CYAN_ON_NOTHING));
		wattron(win_general, A_BOLD);
		uint64_t nics_in = gsl->host_rx_packets - gsb->host_rx_packets + gsl->nics_ierrors - gsb->nics_ierrors + gsl->nics_imissed - gsb->nics_imissed;
		uint64_t nics_out = gsl->host_tx_packets - gsb->host_tx_packets;
		mvwaddstrf(win_general, 1, 103, "%6.2f", nics_out > nics_in?
			   100 : nics_out * 100.0 / nics_in);
		wattron(win_general, A_BOLD);
		wbkgdset(win_general, COLOR_PAIR(NO_COLOR));
	}
}

static void display_stats_general_total(void)
{
	struct global_stats_sample *gsl = stats_get_global_stats(1);

	int64_t diff = (int64_t)gsl->host_rx_packets - gsl->host_tx_packets;
	uint32_t percent;

	/* Host: RX, TX, Diff */
	mvwaddstrf(win_general, 0, 13, "%16lu", gsl->host_rx_packets);
	mvwaddstrf(win_general, 0, 35, "%16lu", gsl->host_tx_packets);
	mvwaddstrf(win_general, 0, 60, "%16"PRId64"", diff);
	if (gsl->host_rx_packets == 0)
		percent = 1000000;
	else
		percent = gsl->host_tx_packets * 1000000 / gsl->host_rx_packets;
	mvwaddstrf(win_general, 0, 88, "%3u.%04u%%", percent / 10000, percent % 10000);
	if (gsl->host_tx_packets == 0)
		percent = 1000000;
	else
		percent = gsl->host_rx_packets * 1000000 / gsl->host_tx_packets;
	mvwaddstrf(win_general, 0, 106, "%3u.%04u%%", percent / 10000, percent % 10000);

	mvwaddstrf(win_general, 1, 13, "%16lu", gsl->nics_rx_packets);
	mvwaddstrf(win_general, 1, 35, "%16lu", gsl->nics_tx_packets);
	mvwaddstrf(win_general, 1, 60, "%16lu", gsl->nics_ierrors + gsl->nics_imissed);
	if (gsl->nics_rx_packets == 0)
		percent = 1000000;
	else
		percent = gsl->nics_tx_packets * 1000000 / gsl->nics_rx_packets;
	mvwaddstrf(win_general, 1, 88, "%3u.%04u%%", percent / 10000, percent % 10000);
	if (gsl->nics_tx_packets == 0)
		percent = 1000000;
	else
		percent = gsl->nics_rx_packets * 1000000 / gsl->nics_tx_packets;
	mvwaddstrf(win_general, 1, 106, "%3u.%04u%%", percent / 10000, percent % 10000);
}

static void display_stats_general(void)
{
	/* moment when stats were gathered. */
	uint64_t cur_tsc = stats_get_last_tsc();
	uint64_t up_time = tsc_to_sec(cur_tsc - stats_global_start_tsc());
	uint64_t up_time2 = tsc_to_sec(cur_tsc - stats_global_beg_tsc());
	uint64_t rem_time = -1;
	char title_str[128] = {0};

	if (stats_global_end_tsc()) {
		uint64_t rem_tsc = stats_global_end_tsc() > cur_tsc? stats_global_end_tsc() - cur_tsc : 0;

		rem_time = tsc_to_sec(rem_tsc);
	}

	if (up_time != up_time2 && cur_tsc >= stats_global_beg_tsc()) {
		if (stats_global_end_tsc())
			snprintf(title_str, sizeof(title_str), "%5lu (%lu) up, %lu rem", up_time, up_time2, rem_time);
		else
			snprintf(title_str, sizeof(title_str), "%5lu (%lu) up", up_time, up_time2);
	}
	else {
		if (stats_global_end_tsc())
			snprintf(title_str, sizeof(title_str), "%5lu up, %lu rem", up_time, rem_time);
		else
			snprintf(title_str, sizeof(title_str), "%5lu up", up_time);
	}

	/* Only print up time information if there is enough space */
	if ((int)((COLS + title_len)/2 + strlen(title_str) + 1) < COLS) {
		mvwaddstrf(win_title, 0, COLS - strlen(title_str), "%s", title_str);
		wrefresh(win_title);
	}

	if (screen_state.toggle == 0)
		display_stats_general_per_sec();
	else
		display_stats_general_total();

	wrefresh(win_general);
}

char *print_time_unit_err_usec(char *dst, struct time_unit_err *t)
{
	uint64_t nsec_total = time_unit_to_nsec(&t->time);

	uint64_t usec = nsec_total/1000;
	uint64_t nsec = nsec_total - usec*1000;

	uint64_t nsec_total_error = time_unit_to_nsec(&t->error);

	uint64_t usec_error = nsec_total_error/1000;
	uint64_t nsec_error = nsec_total_error - usec_error*1000;

	sprintf(dst, "%4"PRIu64".%03"PRIu64" +/- %2"PRIu64".%03"PRIu64"", usec, nsec, usec_error, nsec_error);
	return dst;
}

char *print_time_unit_usec(char *dst, struct time_unit *t)
{
	uint64_t nsec_total = time_unit_to_nsec(t);

	uint64_t usec = nsec_total/1000;
	uint64_t nsec = nsec_total - usec*1000;

	sprintf(dst, "%4"PRIu64".%03"PRIu64"", usec, nsec);
	return dst;
}

void toggle_display_screen(void)
{
	screen_state.toggle = !screen_state.toggle;
	stats_display_layout(0);
}

void display_screen(unsigned screen_id)
{
	if (screen_id >= n_screens) {
		plog_err("Unsupported screen %d\n", screen_id + 1);
		return;
	}

	if (screen_state.chosen_screen == screen_id) {
		stats_display_layout(1);
	}
	else {
		screen_state.chosen_screen = screen_id;
		current_screen = display_screens[screen_id];
		stats_display_layout(0);
	}
}

void display_page_up(void)
{
}

void display_page_down(void)
{
}

void display_refresh(void)
{
	stats_display_layout(1);
}

void display_stats(void)
{
	display_lock();
	current_screen->draw_stats(&screen_state);
	display_stats_general();
	wrefresh(win_stat);
	display_unlock();
}

static char pages[32768] = {0};
static int cur_idx = 0;
static size_t pages_len = 0;

void display_print_page(void)
{
	int n_lines = 0;
	int cur_idx_prev = cur_idx;

	if (cur_idx >= (int)pages_len) {
		return;
	}

	display_lock();
	for (size_t i = cur_idx; i < pages_len; ++i) {
		if (pages[i] == '\n') {
			n_lines++;
			if (n_lines == win_txt_height - 2) {
				pages[i] = 0;
				cur_idx = i + 1;
				break;
			}
		}
	}

	waddstr(win_txt, pages + cur_idx_prev);
	if (cur_idx != cur_idx_prev && cur_idx < (int)pages_len)
		waddstr(win_txt, "\nPRESS ENTER FOR MORE...\n");
	else {
		pages_len = 0;
	}
	wrefresh(win_txt);
	display_unlock();
}

void display_print(const char *str)
{
	display_lock();

	if (scr == NULL) {
		fputs(str, stdout);
		fflush(stdout);
		display_unlock();
		return;
	}

	/* Check if the whole string can fit on the screen. */
	pages_len = strlen(str);
	int n_lines = 0;
	memset(pages, 0, sizeof(pages));
	memcpy(pages, str, pages_len);
	cur_idx = 0;
	for (size_t i = 0; i < pages_len; ++i) {
		if (pages[i] == '\n') {
			n_lines++;
			if (n_lines == win_txt_height - 2) {
				pages[i] = 0;
				cur_idx = i + 1;
				break;
			}
		}
	}

	waddstr(win_txt, pages);
	if (cur_idx != 0)
		waddstr(win_txt, "\nPRESS ENTER FOR MORE...\n");
	else
		pages_len = 0;

	wrefresh(win_txt);
	display_unlock();
}