lsquic_eng_hist.c revision 50aadb33 
1/* Copyright (c) 2017 LiteSpeed Technologies Inc.  See LICENSE. */
2#include <time.h>
3
4#include "lsquic_eng_hist.h"
5
6#if ENG_HIST_ENABLED
7
8#define LSQUIC_LOGGER_MODULE LSQLM_ENG_HIST
9#include "lsquic_logger.h"
10
11
12static void
13log_hist_slice (const struct hist_slice *slice, time_t t)
14{
15    size_t strftime(char *s, size_t max, const char *format,
16                                  const struct tm *tm);
17    if (slice->sl_packets_in == 0 &&
18        slice->sl_packets_out == 0 &&
19        slice->sl_del_mini_conns == 0 &&
20        slice->sl_del_full_conns == 0)
21        return;
22
23    struct tm tm;
24    char timestr[sizeof("12:00:00")];
25
26    localtime_r(&t, &tm);
27    strftime(timestr, sizeof(timestr), "%T", &tm);
28
29    LSQ_DEBUG("%s: pi: %u; po: %u; +mc: %u; -mc: %u; +fc: %u; -fc: %u",
30        timestr,
31        slice->sl_packets_in,
32        slice->sl_packets_out,
33        slice->sl_new_mini_conns,
34        slice->sl_del_mini_conns,
35        slice->sl_new_full_conns,
36        slice->sl_del_full_conns);
37}
38
39
40void
41eng_hist_log (const struct eng_hist *hist)
42{
43    unsigned i, idx;
44    time_t t0 = time(NULL) - ENG_HIST_NELEMS + 1;
45    for (i = 0; i < ENG_HIST_NELEMS; ++i)
46    {
47        idx = (hist->eh_prev_idx + i + 1) & (ENG_HIST_NELEMS - 1);
48        if (i >= ENG_HIST_NELEMS - ENG_HIST_N_TO_PRINT)
49            log_hist_slice(&hist->eh_slices[idx], t0 + i);
50    }
51}
52
53#endif
54