lib/dpkg/perf.h

   1 /*
   2  * libdpkg - Debian packaging suite library routines
   3  * perf.h - performance testing support
   4  *
   5  * Copyright © 2009-2019 Guillem Jover <guillem@debian.org>
   6  *
   7  * This is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2,
  10  * or (at your option) any later version.
  11  *
  12  * This is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef LIBDPKG_PERF_H
  22 #define LIBDPKG_PERF_H
  23
  24 #include <config.h>
  25 #include <compat.h>
  26
  27 #include <time.h>
  28 #include <stdio.h>
  29
  30 #define TEST_OMIT_VARIABLES
  31 #include <dpkg/test.h>
  32
  33 DPKG_BEGIN_DECLS
  34
  35 struct perf_slot {
  36         struct timespec t_ini, t_end;
  37 };
  38
  39 static inline void
  40 perf_ts_sub(struct timespec *a, struct timespec *b, struct timespec *res)
  41 {
  42         res->tv_sec = a->tv_sec - b->tv_sec;
  43         res->tv_nsec = a->tv_nsec - b->tv_nsec;
  44         if (res->tv_nsec < 0) {
  45                 res->tv_sec--;
  46                 res->tv_nsec += 1000000000;
  47         }
  48 }
  49
  50 static inline void
  51 perf_ts_mark_print(const char *str)
  52 {
  53         struct timespec ts;
  54
  55         clock_gettime(CLOCK_MONOTONIC, &ts);
  56
  57         printf("%lu.%.9lu: %s\n", ts.tv_sec, ts.tv_nsec, str);
  58 }
  59
  60 static inline void
  61 perf_ts_slot_print(struct perf_slot *ps, const char *str)
  62 {
  63         struct timespec t_res;
  64
  65         perf_ts_sub(&ps->t_end, &ps->t_ini, &t_res);
  66
  67         printf("%lu.%.9lu: %s (%lu.%.9lu sec)\n",
  68                ps->t_end.tv_sec, ps->t_end.tv_nsec,
  69                str, t_res.tv_sec, t_res.tv_nsec);
  70 }
  71
  72 #define perf_ts_slot_start(ps) clock_gettime(CLOCK_MONOTONIC, &((ps)->t_ini))
  73 #define perf_ts_slot_stop(ps) clock_gettime(CLOCK_MONOTONIC, &((ps)->t_end))
  74
  75 DPKG_END_DECLS
  76
  77 #endif