/**
* Object oriented C module to send ICMP and ICMPv6 `echo's.
- * Copyright (C) 2006-2011 Florian octo Forster <ff at octo.it>
+ * Copyright (C) 2006-2014 Florian octo Forster <ff at octo.it>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
/ sizeof (hist_colors_utf8[0]);
#endif
+/* "─" */
+#define BOXPLOT_WHISKER_BAR (113 | A_ALTCHARSET)
+/* "├" */
+#define BOXPLOT_WHISKER_LEFT_END (116 | A_ALTCHARSET)
+/* "┤" */
+#define BOXPLOT_WHISKER_RIGHT_END (117 | A_ALTCHARSET)
+/* Inverted */
+#define BOXPLOT_BOX ' '
+/* "│", inverted */
+#define BOXPLOT_MEDIAN (120 | A_ALTCHARSET)
+
#include "oping.h"
#ifndef _POSIX_SAVED_IDS
double latency_total;
double latency_total_square;
+/* 1000 + one "infinity" bucket. */
+#define OPING_HISTOGRAM_BUCKETS 1001
+ uint32_t *latency_histogram;
+ size_t latency_histogram_size;
+
#if USE_NCURSES
WINDOW *window;
#endif
static int opt_count = -1;
static int opt_send_ttl = 64;
static uint8_t opt_send_qos = 0;
+#define OPING_DEFAULT_PERCENTILE 95.0
+static double opt_percentile = -1.0;
static double opt_exit_status_threshold = 1.0;
#if USE_NCURSES
+static int opt_show_graph = 1;
static int opt_utf8 = 0;
#endif
ret->latency_total = 0.0;
ret->latency_total_square = 0.0;
+ ret->latency_histogram_size = (size_t) OPING_HISTOGRAM_BUCKETS;
+ ret->latency_histogram = calloc (ret->latency_histogram_size,
+ sizeof (*ret->latency_histogram));
+
#if USE_NCURSES
ret->window = NULL;
#endif
}
#endif
+ free (context->latency_histogram);
+ context->latency_histogram = NULL;
+
free (context);
} /* }}} void context_destroy */
return (ctx->latency_total / num_total);
} /* }}} double context_get_average */
+static double context_get_percentile (ping_context_t *ctx, /* {{{ */
+ double percentile)
+{
+ double threshold = percentile / 100.0;
+ uint32_t accumulated[ctx->latency_histogram_size];
+ double ratios[ctx->latency_histogram_size];
+ double index_to_ms_factor;
+ uint32_t num;
+ size_t i;
+
+ if (ctx->latency_histogram == NULL)
+ return (NAN);
+
+ accumulated[0] = ctx->latency_histogram[0];
+ for (i = 1; i < ctx->latency_histogram_size; i++)
+ accumulated[i] = accumulated[i - 1]
+ + ctx->latency_histogram[i];
+ num = accumulated[ctx->latency_histogram_size - 1];
+
+ for (i = 0; i < ctx->latency_histogram_size; i++)
+ {
+ ratios[i] = ((double) accumulated[i]) / ((double) num);
+ if (ratios[i] >= threshold)
+ break;
+ }
+
+ if (i >= ctx->latency_histogram_size)
+ return (NAN);
+ else if (i == (ctx->latency_histogram_size - 1))
+ return (INFINITY);
+
+ index_to_ms_factor = (1000.0 * opt_interval) / (ctx->latency_histogram_size - 1);
+
+ /* Multiply with i+1, because we're interested in the _upper_ bound of
+ * each bucket. */
+ return (index_to_ms_factor * ((double) (i + 1)));
+} /* }}} double context_get_percentile */
+
static double context_get_stddev (ping_context_t *ctx) /* {{{ */
{
double num_total;
#if USE_NCURSES
" -u / -U force / disable UTF-8 output\n"
#endif
+ " -P percent Report the n'th percentile of latency\n"
" -Z percent Exit with non-zero exit status if more than this percentage of\n"
" probes timed out. (default: never)\n"
while (1)
{
- optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:"
+ optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:P:"
#if USE_NCURSES
- "uU"
+ "uUg:"
#endif
);
int new_count;
new_count = atoi (optarg);
if (new_count > 0)
+ {
opt_count = new_count;
+
+ if ((opt_percentile < 0.0) && (opt_count < 20))
+ opt_percentile = 100.0 * (opt_count - 1) / opt_count;
+ }
else
fprintf(stderr, "Ignoring invalid count: %s\n",
optarg);
opt_interval = new_interval;
}
break;
+
case 'I':
{
if (opt_srcaddr != NULL)
set_opt_send_qos (optarg);
break;
+ case 'P':
+ {
+ double new_percentile;
+ new_percentile = atof (optarg);
+ if (isnan (new_percentile)
+ || (new_percentile < 0.1)
+ || (new_percentile > 100.0))
+ fprintf (stderr, "Ignoring invalid percentile: %s\n",
+ optarg);
+ else
+ opt_percentile = new_percentile;
+ }
+ break;
+
#if USE_NCURSES
+ case 'g':
+ if (strcasecmp ("none", optarg) == 0)
+ opt_show_graph = 0;
+ else if (strcasecmp ("prettyping", optarg) == 0)
+ opt_show_graph = 1;
+ else if (strcasecmp ("boxplot", optarg) == 0)
+ opt_show_graph = 2;
+ else if (strcasecmp ("histogram", optarg) == 0)
+ opt_show_graph = 3;
+ else
+ fprintf (stderr, "Unknown graph option: %s\n", optarg);
+ break;
+
case 'u':
opt_utf8 = 2;
break;
case 'h':
usage_exit (argv[0], 0);
break;
+
default:
usage_exit (argv[0], 1);
}
}
+ if (opt_percentile <= 0.0)
+ opt_percentile = OPING_DEFAULT_PERCENTILE;
+
return (optind);
} /* }}} read_options */
# endif
} /* }}} _Bool has_utf8 */
-static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
+static int update_graph_boxplot (ping_context_t *ctx) /* {{{ */
+{
+ uint32_t *accumulated;
+ double *ratios;
+ uint32_t num;
+ size_t i;
+ size_t x_max;
+ size_t x;
+
+ x_max = (size_t) getmaxx (ctx->window);
+ if (x_max <= 4)
+ return (EINVAL);
+ x_max -= 4;
+
+ accumulated = calloc (x_max, sizeof (*accumulated));
+ ratios = calloc (x_max, sizeof (*ratios));
+
+ /* Downsample */
+ for (i = 0; i < ctx->latency_histogram_size; i++)
+ {
+ x = i * x_max / ctx->latency_histogram_size;
+ accumulated[x] += ctx->latency_histogram[i];
+ }
+
+ /* Sum */
+ for (x = 1; x < x_max; x++)
+ accumulated[x] += accumulated[x - 1];
+
+ num = accumulated[x_max - 1];
+
+ /* Calculate ratios */
+ for (x = 0; x < x_max; x++)
+ ratios[x] = ((double) accumulated[x]) / ((double) num);
+
+ for (x = 0; x < x_max; x++)
+ {
+ int symbol = ' ';
+ _Bool reverse = 0;
+
+ if (x == 0)
+ {
+ if (ratios[x] >= 0.5)
+ {
+ symbol = BOXPLOT_MEDIAN;
+ reverse = 1;
+ }
+ else if (ratios[x] > 0.25)
+ {
+ symbol = BOXPLOT_BOX;
+ reverse = 1;
+ }
+ else if (ratios[x] > 0.025)
+ symbol = BOXPLOT_WHISKER_BAR;
+ else
+ symbol = ' '; /* NOP */
+ }
+ else /* (x != 0) */
+ {
+ if ((ratios[x - 1] < 0.5) && (ratios[x] >= 0.5))
+ {
+ symbol = BOXPLOT_MEDIAN;
+ reverse = 1;
+ }
+ else if (((ratios[x] >= 0.25) && (ratios[x] <= 0.75))
+ || ((ratios[x - 1] < 0.75) && (ratios[x] > 0.75)))
+ {
+ symbol = BOXPLOT_BOX;
+ reverse = 1;
+ }
+ else if ((ratios[x] < 0.5) && (ratios[x] >= 0.025))
+ {
+ if (ratios[x - 1] < 0.025)
+ symbol = BOXPLOT_WHISKER_LEFT_END;
+ else
+ symbol = BOXPLOT_WHISKER_BAR;
+ }
+ else if ((ratios[x] > .5) && (ratios[x] < 0.975))
+ {
+ symbol = BOXPLOT_WHISKER_BAR;
+ }
+ else if ((ratios[x] >= 0.975) && (ratios[x - 1] < 0.975))
+ symbol = BOXPLOT_WHISKER_RIGHT_END;
+ }
+
+ if (reverse)
+ wattron (ctx->window, A_REVERSE);
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
+ // mvwprintw (ctx->window, /* y = */ 3, /* x = */ (int) (x + 2), symbol);
+ if (reverse)
+ wattroff (ctx->window, A_REVERSE);
+ }
+
+ free (ratios);
+ free (accumulated);
+ return (0);
+} /* }}} int update_graph_boxplot */
+
+static int update_graph_prettyping (ping_context_t *ctx, /* {{{ */
double latency, unsigned int sequence)
{
int color = OPING_RED;
wprintw (ctx->window, " ");
return (0);
-} /* }}} int update_prettyping_graph */
+} /* }}} int update_graph_prettyping */
+
+static int update_graph_histogram (ping_context_t *ctx) /* {{{ */
+{
+ uint32_t *counters;
+ uint32_t *accumulated;
+ uint32_t num;
+ uint32_t max;
+ size_t i;
+ size_t x_max;
+ size_t x;
+
+ size_t symbols_num = hist_symbols_acs_num;
+
+ if (has_utf8 ())
+ symbols_num = hist_symbols_utf8_num;
+
+ x_max = (size_t) getmaxx (ctx->window);
+ if (x_max <= 4)
+ return (EINVAL);
+ x_max -= 4;
+
+ counters = calloc (x_max, sizeof (*counters));
+ accumulated = calloc (x_max, sizeof (*accumulated));
+
+ /* Downsample */
+ max = 0;
+ for (i = 0; i < ctx->latency_histogram_size; i++)
+ {
+ x = i * x_max / ctx->latency_histogram_size;
+ counters[x] += ctx->latency_histogram[i];
+ accumulated[x] = counters[x];
+
+ if (max < counters[x])
+ max = counters[x];
+ }
+
+ /* Sum */
+ for (x = 1; x < x_max; x++)
+ accumulated[x] += accumulated[x - 1];
+ num = accumulated[x_max - 1];
+
+ /* Calculate ratios */
+ for (x = 0; x < x_max; x++)
+ {
+ double height = ((double) counters[x]) / ((double) max);
+ double ratio_this = ((double) accumulated[x]) / ((double) num);
+ double ratio_prev = 0.0;
+ size_t index;
+ int color = 0;
+
+ index = (size_t) (height * ((double) symbols_num));
+ if (index >= symbols_num)
+ index = symbols_num - 1;
+
+ if (x > 0)
+ ratio_prev = ((double) accumulated[x - 1]) / ((double) num);
+
+ if (has_colors () == TRUE)
+ {
+ if ((ratio_this <= 0.5) || ((ratio_prev < 0.5) && (ratio_this > 0.5)))
+ color = OPING_GREEN;
+ else if ((ratio_this <= 0.95) || ((ratio_prev < 0.95) && (ratio_this > 0.95)))
+ color = OPING_YELLOW;
+ else
+ color = OPING_RED;
+
+ wattron (ctx->window, COLOR_PAIR(color));
+ }
+
+ if (counters[x] == 0)
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2, ' ');
+ else if (has_utf8 ())
+ mvwprintw (ctx->window, /* y = */ 3, /* x = */ x + 2,
+ hist_symbols_utf8[index]);
+ else
+ mvwaddch (ctx->window, /* y = */ 3, /* x = */ x + 2,
+ hist_symbols_acs[index] | A_ALTCHARSET);
+
+ if (has_colors () == TRUE)
+ wattroff (ctx->window, COLOR_PAIR(color));
+
+ }
+
+ free (accumulated);
+ return (0);
+} /* }}} int update_graph_histogram */
static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
{
{
double average;
double deviation;
+ double percentile;
average = context_get_average (ctx);
deviation = context_get_stddev (ctx);
+ percentile = context_get_percentile (ctx, opt_percentile);
mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
- "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
+ "rtt min/avg/%.0f%%/max/sdev = "
+ "%.3f/%.3f/%.0f/%.3f/%.3f ms\n",
+ opt_percentile,
ctx->latency_min,
average,
+ percentile,
ctx->latency_max,
deviation);
}
- update_prettyping_graph (ctx, latency, sequence);
+ if (opt_show_graph == 1)
+ update_graph_prettyping (ctx, latency, sequence);
+ else if (opt_show_graph == 2)
+ update_graph_boxplot (ctx);
+ else if (opt_show_graph == 3)
+ update_graph_histogram (ctx);
wrefresh (ctx->window);
int width = 0;
int height = 0;
int main_win_height;
+ int box_height = (opt_show_graph == 0) ? 4 : 5;
getmaxyx (stdscr, height, width);
if ((height < 1) || (width < 1))
return (EINVAL);
- main_win_height = height - (5 * host_num);
+ main_win_height = height - (box_height * host_num);
wresize (main_win, main_win_height, /* width = */ width);
/* Allow scrolling */
scrollok (main_win, TRUE);
delwin (context->window);
context->window = NULL;
}
- context->window = newwin (/* height = */ 5,
+ context->window = newwin (/* height = */ box_height,
/* width = */ width,
- /* y = */ main_win_height + (5 * context->index),
+ /* y = */ main_win_height + (box_height * context->index),
/* x = */ 0);
}
int width = 0;
int height = 0;
int main_win_height;
+ int box_height = (opt_show_graph == 0) ? 4 : 5;
initscr ();
cbreak ();
init_pair (OPING_RED_HIST, COLOR_RED, COLOR_YELLOW);
}
- main_win_height = height - (5 * host_num);
+ main_win_height = height - (box_height * host_num);
main_win = newwin (/* height = */ main_win_height,
/* width = */ width,
/* y = */ 0, /* x = */ 0);
delwin (context->window);
context->window = NULL;
}
- context->window = newwin (/* height = */ 5,
+ context->window = newwin (/* height = */ box_height,
/* width = */ width,
- /* y = */ main_win_height + (5 * context->index),
+ /* y = */ main_win_height + (box_height * context->index),
/* x = */ 0);
}
} /* }}} int post_sleep_hook */
#endif
+static void update_context (ping_context_t *context, double latency) /* {{{ */
+{
+ size_t bucket;
+
+ context->req_rcvd++;
+ context->latency_total += latency;
+ context->latency_total_square += (latency * latency);
+
+ if ((context->latency_max < 0.0) || (context->latency_max < latency))
+ context->latency_max = latency;
+ if ((context->latency_min < 0.0) || (context->latency_min > latency))
+ context->latency_min = latency;
+
+ if (context->latency_histogram == NULL)
+ return;
+
+ /* latency is in ms, opt_interval is in s. */
+ bucket = (size_t) ((latency * (context->latency_histogram_size - 1))
+ / (1000.0 * opt_interval));
+ if (bucket >= context->latency_histogram_size)
+ bucket = context->latency_histogram_size - 1;
+ context->latency_histogram[bucket]++;
+} /* }}} void update_context */
+
static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
__attribute__((unused)) int index)
{
context->req_sent++;
if (latency > 0.0)
{
- context->req_rcvd++;
- context->latency_total += latency;
- context->latency_total_square += (latency * latency);
-
- if ((context->latency_max < 0.0) || (context->latency_max < latency))
- context->latency_max = latency;
- if ((context->latency_min < 0.0) || (context->latency_min > latency))
- context->latency_min = latency;
+ update_context (context, latency);
#if USE_NCURSES
if (has_colors () == TRUE)
{
double average;
double deviation;
+ double percentile;
average = context_get_average (context);
deviation = context_get_stddev (context);
+ percentile = context_get_percentile (context, opt_percentile);
- printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
+ printf ("rtt min/avg/%.0f%%/max/sdev = "
+ "%.3f/%.3f/%.0f/%.3f/%.3f ms\n",
+ opt_percentile,
context->latency_min,
average,
+ percentile,
context->latency_max,
deviation);
}
projects / liboping.git / blobdiff