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stats.c
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stats.c
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
//
// stats.c: statistics helpers.
//
// Copyright (c) 2015 Oliver Jowett <oliver@mutability.co.uk>
//
// This file is free software: you may copy, redistribute and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation, either version 2 of the License, or (at your
// option) any later version.
//
// This file is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// This file incorporates work covered by the following copyright and
// permission notice:
//
// Copyright (C) 2012 by Salvatore Sanfilippo <antirez@gmail.com>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "dump1090.h"
void add_timespecs(const struct timespec *x, const struct timespec *y, struct timespec *z)
{
z->tv_sec = x->tv_sec + y->tv_sec;
z->tv_nsec = x->tv_nsec + y->tv_nsec;
z->tv_sec += z->tv_nsec / 1000000000L;
z->tv_nsec = z->tv_nsec % 1000000000L;
}
static void display_range_histogram(struct stats *st);
void display_stats(struct stats *st) {
int j;
time_t tt_start, tt_end;
struct tm tm_start, tm_end;
char tb_start[30], tb_end[30];
printf("\n\n");
tt_start = st->start/1000;
localtime_r(&tt_start, &tm_start);
strftime(tb_start, sizeof(tb_start), "%c %Z", &tm_start);
tt_end = st->end/1000;
localtime_r(&tt_end, &tm_end);
strftime(tb_end, sizeof(tb_end), "%c %Z", &tm_end);
printf("Statistics: %s - %s\n", tb_start, tb_end);
if (!Modes.net_only) {
printf("Local receiver:\n");
printf(" %12llu samples processed\n", (unsigned long long)st->samples_processed);
printf(" %12llu samples dropped\n", (unsigned long long)st->samples_dropped);
printf(" %12u Mode A/C messages received\n", st->demod_modeac);
printf(" %12u Mode-S message preambles received\n", st->demod_preambles);
printf(" %12u with bad message format or invalid CRC\n", st->demod_rejected_bad);
printf(" %12u with unrecognized ICAO address\n", st->demod_rejected_unknown_icao);
printf(" %12u accepted with correct CRC\n", st->demod_accepted[0]);
for (j = 1; j <= Modes.nfix_crc; ++j)
printf(" %12u accepted with %d-bit error repaired\n", st->demod_accepted[j], j);
if (st->noise_power_sum > 0 && st->noise_power_count > 0) {
printf(" %5.1f dBFS noise power\n",
10 * log10(st->noise_power_sum / st->noise_power_count));
} else {
printf(" ----- dBFS noise power\n");
}
if (st->signal_power_sum > 0 && st->signal_power_count > 0) {
printf(" %5.1f dBFS mean signal power\n",
10 * log10(st->signal_power_sum / st->signal_power_count));
} else {
printf(" ----- dBFS mean signal power\n");
}
if (st->peak_signal_power > 0) {
printf(" %5.1f dBFS peak signal power\n",
10 * log10(st->peak_signal_power));
} else {
printf(" ----- dBFS peak signal power\n");
}
printf(" %5u messages with signal power above -3dBFS\n",
st->strong_signal_count);
}
if (Modes.net) {
printf("Messages from network clients:\n");
printf(" %8u Mode A/C messages received\n", st->remote_received_modeac);
printf(" %8u Mode S messages received\n", st->remote_received_modes);
printf(" %8u with bad message format or invalid CRC\n", st->remote_rejected_bad);
printf(" %8u with unrecognized ICAO address\n", st->remote_rejected_unknown_icao);
printf(" %8u accepted with correct CRC\n", st->remote_accepted[0]);
for (j = 1; j <= Modes.nfix_crc; ++j)
printf(" %8u accepted with %d-bit error repaired\n", st->remote_accepted[j], j);
}
printf("%8u total usable messages\n",
st->messages_total);
for (unsigned i = 0; i < 32; ++i) {
if (st->messages_by_df[i])
printf(" %8u DF%u messages\n", st->messages_by_df[i], i);
}
printf("%8u surface position messages received\n"
"%8u airborne position messages received\n"
"%8u global CPR attempts with valid positions\n"
"%8u global CPR attempts with bad data\n"
" %8u global CPR attempts that failed the range check\n"
" %8u global CPR attempts that failed the speed check\n"
"%8u global CPR attempts with insufficient data\n"
"%8u local CPR attempts with valid positions\n"
" %8u aircraft-relative positions\n"
" %8u receiver-relative positions\n"
"%8u local CPR attempts that did not produce useful positions\n"
" %8u local CPR attempts that failed the range check\n"
" %8u local CPR attempts that failed the speed check\n"
"%8u CPR messages that look like transponder failures filtered\n",
st->cpr_surface,
st->cpr_airborne,
st->cpr_global_ok,
st->cpr_global_bad,
st->cpr_global_range_checks,
st->cpr_global_speed_checks,
st->cpr_global_skipped,
st->cpr_local_ok,
st->cpr_local_aircraft_relative,
st->cpr_local_receiver_relative,
st->cpr_local_skipped,
st->cpr_local_range_checks,
st->cpr_local_speed_checks,
st->cpr_filtered);
printf("%8u non-ES altitude messages from ES-equipped aircraft ignored\n", st->suppressed_altitude_messages);
printf("%8u unique aircraft tracks\n", st->unique_aircraft);
printf("%8u aircraft tracks where only one message was seen\n", st->single_message_aircraft);
printf("%8u aircraft tracks which were not marked reliable\n", st->unreliable_aircraft);
{
uint64_t demod_cpu_millis = (uint64_t)st->demod_cpu.tv_sec*1000UL + st->demod_cpu.tv_nsec/1000000UL;
uint64_t reader_cpu_millis = (uint64_t)st->reader_cpu.tv_sec*1000UL + st->reader_cpu.tv_nsec/1000000UL;
uint64_t background_cpu_millis = (uint64_t)st->background_cpu.tv_sec*1000UL + st->background_cpu.tv_nsec/1000000UL;
printf("CPU load: %5.1f%%\n"
" %5llu ms for demodulation\n"
" %5llu ms for reading from USB\n"
" %5llu ms for network input and background tasks\n",
100.0 * (demod_cpu_millis + reader_cpu_millis + background_cpu_millis) / (st->end - st->start + 1),
(unsigned long long) demod_cpu_millis,
(unsigned long long) reader_cpu_millis,
(unsigned long long) background_cpu_millis);
}
if (Modes.stats_range_histo)
display_range_histogram(st);
fflush(stdout);
}
static void display_range_histogram(struct stats *st)
{
uint32_t peak;
int i, j;
int heights[RANGE_BUCKET_COUNT];
#if 0
#define NPIXELS 4
char *pixels[NPIXELS] = { ".", "o", "O", "|" };
#else
// UTF-8 bar symbols
#define NPIXELS 8
char *pixels[NPIXELS] = {
"\xE2\x96\x81",
"\xE2\x96\x82",
"\xE2\x96\x83",
"\xE2\x96\x84",
"\xE2\x96\x85",
"\xE2\x96\x86",
"\xE2\x96\x87",
"\xE2\x96\x88"
};
#endif
printf ("Range histogram:\n\n");
for (i = 0, peak = 0; i < RANGE_BUCKET_COUNT; ++i) {
if (st->range_histogram[i] > peak)
peak = st->range_histogram[i];
}
for (i = 0; i < RANGE_BUCKET_COUNT; ++i) {
heights[i] = st->range_histogram[i] * 20.0 * NPIXELS / peak;
if (st->range_histogram[i] > 0 && heights[i] == 0)
heights[i] = 1;
}
for (j = 0; j < 20; ++j) {
for (i = 0; i < RANGE_BUCKET_COUNT; ++i) {
int pheight = heights[i] - ((19 - j) * NPIXELS);
if (pheight <= 0)
printf(" ");
else if (pheight >= NPIXELS)
printf("%s", pixels[NPIXELS-1]);
else
printf("%s", pixels[pheight]);
}
printf("\n");
}
for (i = 0; i < RANGE_BUCKET_COUNT/4; ++i) {
printf("----");
}
printf("\n");
for (i = 0; i < RANGE_BUCKET_COUNT/4; ++i) {
printf(" ' ");
}
printf("\n");
for (i = 0; i < RANGE_BUCKET_COUNT/4; ++i) {
int midpoint = round((i*4+1.5) * Modes.maxRange / RANGE_BUCKET_COUNT / 1000);
printf("%03d ", midpoint);
}
printf("km\n");
}
void reset_stats(struct stats *st) {
static struct stats st_zero;
*st = st_zero;
}
void add_stats(const struct stats *st1, const struct stats *st2, struct stats *target) {
int i;
if (st1->start == 0)
target->start = st2->start;
else if (st2->start == 0)
target->start = st1->start;
else if (st1->start < st2->start)
target->start = st1->start;
else
target->start = st2->start;
target->end = st1->end > st2->end ? st1->end : st2->end;
target->demod_preambles = st1->demod_preambles + st2->demod_preambles;
target->demod_rejected_bad = st1->demod_rejected_bad + st2->demod_rejected_bad;
target->demod_rejected_unknown_icao = st1->demod_rejected_unknown_icao + st2->demod_rejected_unknown_icao;
for (i = 0; i < MODES_MAX_BITERRORS+1; ++i)
target->demod_accepted[i] = st1->demod_accepted[i] + st2->demod_accepted[i];
target->demod_modeac = st1->demod_modeac + st2->demod_modeac;
target->samples_processed = st1->samples_processed + st2->samples_processed;
target->samples_dropped = st1->samples_dropped + st2->samples_dropped;
add_timespecs(&st1->demod_cpu, &st2->demod_cpu, &target->demod_cpu);
add_timespecs(&st1->reader_cpu, &st2->reader_cpu, &target->reader_cpu);
add_timespecs(&st1->background_cpu, &st2->background_cpu, &target->background_cpu);
// noise power:
target->noise_power_sum = st1->noise_power_sum + st2->noise_power_sum;
target->noise_power_count = st1->noise_power_count + st2->noise_power_count;
// mean signal power:
target->signal_power_sum = st1->signal_power_sum + st2->signal_power_sum;
target->signal_power_count = st1->signal_power_count + st2->signal_power_count;
// peak signal power seen
if (st1->peak_signal_power > st2->peak_signal_power)
target->peak_signal_power = st1->peak_signal_power;
else
target->peak_signal_power = st2->peak_signal_power;
// strong signals
target->strong_signal_count = st1->strong_signal_count + st2->strong_signal_count;
// remote messages:
target->remote_received_modeac = st1->remote_received_modeac + st2->remote_received_modeac;
target->remote_received_modes = st1->remote_received_modes + st2->remote_received_modes;
target->remote_rejected_bad = st1->remote_rejected_bad + st2->remote_rejected_bad;
target->remote_rejected_unknown_icao = st1->remote_rejected_unknown_icao + st2->remote_rejected_unknown_icao;
for (i = 0; i < MODES_MAX_BITERRORS+1; ++i)
target->remote_accepted[i] = st1->remote_accepted[i] + st2->remote_accepted[i];
// total messages:
target->messages_total = st1->messages_total + st2->messages_total;
for (i = 0; i < 32; ++i)
target->messages_by_df[i] = st1->messages_by_df[i] + st2->messages_by_df[i];
// CPR decoding:
target->cpr_surface = st1->cpr_surface + st2->cpr_surface;
target->cpr_airborne = st1->cpr_airborne + st2->cpr_airborne;
target->cpr_global_ok = st1->cpr_global_ok + st2->cpr_global_ok;
target->cpr_global_bad = st1->cpr_global_bad + st2->cpr_global_bad;
target->cpr_global_skipped = st1->cpr_global_skipped + st2->cpr_global_skipped;
target->cpr_global_range_checks = st1->cpr_global_range_checks + st2->cpr_global_range_checks;
target->cpr_global_speed_checks = st1->cpr_global_speed_checks + st2->cpr_global_speed_checks;
target->cpr_local_ok = st1->cpr_local_ok + st2->cpr_local_ok;
target->cpr_local_aircraft_relative = st1->cpr_local_aircraft_relative + st2->cpr_local_aircraft_relative;
target->cpr_local_receiver_relative = st1->cpr_local_receiver_relative + st2->cpr_local_receiver_relative;
target->cpr_local_skipped = st1->cpr_local_skipped + st2->cpr_local_skipped;
target->cpr_local_range_checks = st1->cpr_local_range_checks + st2->cpr_local_range_checks;
target->cpr_local_speed_checks = st1->cpr_local_speed_checks + st2->cpr_local_speed_checks;
target->cpr_filtered = st1->cpr_filtered + st2->cpr_filtered;
target->suppressed_altitude_messages = st1->suppressed_altitude_messages + st2->suppressed_altitude_messages;
// aircraft
target->unique_aircraft = st1->unique_aircraft + st2->unique_aircraft;
target->single_message_aircraft = st1->single_message_aircraft + st2->single_message_aircraft;
target->unreliable_aircraft = st1->unreliable_aircraft + st2->unreliable_aircraft;
// range histogram
for (i = 0; i < RANGE_BUCKET_COUNT; ++i)
target->range_histogram[i] = st1->range_histogram[i] + st2->range_histogram[i];
}