AFG/dump1090
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Measure CPU for demodulator, read thread, and background tasks individually.

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This commit is contained in:
Oliver Jowett 2015-01-23 01:22:22 +00:00
parent 9deac8d894
commit 5b40377b98
5 changed files with 88 additions and 32 deletions
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37
stats.c
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@ -49,6 +49,14 @@
#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;
@ -70,13 +78,6 @@ void display_stats(struct stats *st) {
printf(" %u sample blocks processed\n", st->blocks_processed);
printf(" %u sample blocks dropped\n", st->blocks_dropped);
if (st->blocks_processed > 0) {
long cpu_millis = (long)st->cputime.tv_sec*1000L + st->cputime.tv_nsec/1000000L;
long sample_millis = (long) ((uint64_t)st->blocks_processed * MODES_ASYNC_BUF_SAMPLES / (Modes.oversample ? 2400 : 2000));
printf(" %ld ms CPU time used to process %ld ms samples, %.1f%% load\n",
cpu_millis, sample_millis, 100.0 * cpu_millis / sample_millis);
}
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);
@ -132,6 +133,21 @@ void display_stats(struct stats *st) {
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"
" %lu ms for demodulation\n"
" %lu ms for reading from USB\n"
" %lu ms for network input and background tasks\n",
0.1 * (demod_cpu_millis + reader_cpu_millis + background_cpu_millis) / (st->end - st->start + 1),
demod_cpu_millis,
reader_cpu_millis,
background_cpu_millis);
}
fflush(stdout);
}
@ -164,10 +180,9 @@ void add_stats(const struct stats *st1, const struct stats *st2, struct stats *t
target->blocks_processed = st1->blocks_processed + st2->blocks_processed;
target->blocks_dropped = st1->blocks_dropped + st2->blocks_dropped;
target->cputime.tv_sec = st1->cputime.tv_sec + st2->cputime.tv_sec;
target->cputime.tv_nsec = st1->cputime.tv_nsec + st2->cputime.tv_nsec;
target->cputime.tv_sec += target->cputime.tv_nsec / 1000000000L;
target->cputime.tv_nsec %= 1000000000L;
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;