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dump1090/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;
}
void display_stats(struct stats *st) {
int j;
struct tm tm_start, tm_end;
char tb_start[30], tb_end[30];
printf("\n\n");
if (Modes.interactive)
interactiveShowData();
localtime_r(&st->start, &tm_start);
strftime(tb_start, sizeof(tb_start), "%c", &tm_start);
localtime_r(&st->end, &tm_end);
strftime(tb_end, sizeof(tb_end), "%c", &tm_end);
printf("Statistics: %s - %s\n", tb_start, tb_end);
if (!Modes.net_only) {
printf("Local receiver:\n");
printf(" %u sample blocks processed\n", st->blocks_processed);
printf(" %u sample blocks dropped\n", st->blocks_dropped);
printf(" %u Mode A/C messages received\n", st->demod_modeac);
printf(" %u Mode-S message preambles received\n", st->demod_preambles);
printf(" %u with bad message format or invalid CRC\n", st->demod_rejected_bad);
printf(" %u with unrecognized ICAO address\n", st->demod_rejected_unknown_icao);
printf(" %u accepted with correct CRC\n", st->demod_accepted[0]);
for (j = 1; j <= Modes.nfix_crc; ++j)
printf(" %u accepted with %d-bit error repaired\n", st->demod_accepted[j], j);
if (st->noise_power_count) {
printf(" %.1f dBFS noise floor\n",
10 * log10(st->noise_power_sum / st->noise_power_count));
}
if (st->signal_power_count) {
printf(" %.1f dBFS mean signal power\n",
10 * log10(st->signal_power_sum / st->signal_power_count));
}
if (st->peak_signal_power) {
printf(" %.1f dBFS peak signal power\n",
10 * log10(st->peak_signal_power));
}
printf(" %u messages with signal power above -3dBFS\n",
st->strong_signal_count);
}
if (Modes.net) {
printf("Messages from network clients:\n");
printf(" %u Mode A/C messages received\n", st->remote_received_modeac);
printf(" %u Mode S messages received\n", st->remote_received_modes);
printf(" %u with bad message format or invalid CRC\n", st->remote_rejected_bad);
printf(" %u with unrecognized ICAO address\n", st->remote_rejected_unknown_icao);
printf(" %u accepted with correct CRC\n", st->remote_accepted[0]);
for (j = 1; j <= Modes.nfix_crc; ++j)
printf(" %u accepted with %d-bit error repaired\n", st->remote_accepted[j], j);
}
printf("%u total usable messages\n",
st->messages_total);
printf("%u global CPR attempts with valid positions\n"
"%u global CPR attempts with bad data\n"
"%u global CPR attempts with insufficient data\n"
"%u local CPR attempts with valid positions\n"
"%u local CPR attempts with insufficient data\n"
"%u CPR messages that look like transponder failures filtered\n",
st->cpr_global_ok,
st->cpr_global_bad,
st->cpr_global_skipped,
st->cpr_local_ok,
st->cpr_local_skipped,
st->cpr_filtered);
printf("%u unique aircraft tracks\n", st->unique_aircraft);
printf("%u aircraft tracks where only one message was seen\n", st->single_message_aircraft);
if (Modes.net && Modes.net_http_port)
printf("%d HTTP requests\n", st->http_requests);
{
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: %.1f%%\n"
" %llu ms for demodulation\n"
" %llu ms for reading from USB\n"
" %llu ms for network input and background tasks\n",
0.1 * (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);
}
fflush(stdout);
}
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->blocks_processed = st1->blocks_processed + st2->blocks_processed;
target->blocks_dropped = st1->blocks_dropped + st2->blocks_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 floor:
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;
// network:
target->http_requests = st1->http_requests + st2->http_requests;
// CPR decoding:
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_local_ok = st1->cpr_local_ok + st2->cpr_local_ok;
target->cpr_local_skipped = st1->cpr_local_skipped + st2->cpr_local_skipped;
target->cpr_filtered = st1->cpr_filtered + st2->cpr_filtered;
// aircraft
target->unique_aircraft = st1->unique_aircraft + st2->unique_aircraft;
target->single_message_aircraft = st1->single_message_aircraft + st2->single_message_aircraft;
}
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