resize/resource_track.c

   1 /*
   2  * resource_track.c --- resource tracking
   3  *
   4  * Copyright (C) 2013 by Theodore Ts'o
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12
  13 #include "config.h"
  14 #include "resize2fs.h"
  15 #include <time.h>
  16 #ifdef HAVE_MALLOC_H
  17 #include <malloc.h>
  18 #endif
  19 #include <sys/resource.h>
  20
  21 void init_resource_track(struct resource_track *track, const char *desc,
  22                          io_channel channel)
  23 {
  24 #ifdef HAVE_GETRUSAGE
  25         struct rusage r;
  26 #endif
  27         io_stats io_start = 0;
  28
  29         track->desc = desc;
  30         track->brk_start = sbrk(0);
  31         gettimeofday(&track->time_start, 0);
  32 #ifdef HAVE_GETRUSAGE
  33 #ifdef sun
  34         memset(&r, 0, sizeof(struct rusage));
  35 #endif
  36         getrusage(RUSAGE_SELF, &r);
  37         track->user_start = r.ru_utime;
  38         track->system_start = r.ru_stime;
  39 #else
  40         track->user_start.tv_sec = track->user_start.tv_usec = 0;
  41         track->system_start.tv_sec = track->system_start.tv_usec = 0;
  42 #endif
  43         track->bytes_read = 0;
  44         track->bytes_written = 0;
  45         if (channel && channel->manager && channel->manager->get_stats)
  46                 channel->manager->get_stats(channel, &io_start);
  47         if (io_start) {
  48                 track->bytes_read = io_start->bytes_read;
  49                 track->bytes_written = io_start->bytes_written;
  50         }
  51 }
  52
  53 static float timeval_subtract(struct timeval *tv1,
  54                               struct timeval *tv2)
  55 {
  56         return ((tv1->tv_sec - tv2->tv_sec) +
  57                 ((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
  58 }
  59
  60 void print_resource_track(ext2_resize_t rfs, struct resource_track *track,
  61                           io_channel channel)
  62 {
  63 #ifdef HAVE_GETRUSAGE
  64         struct rusage r;
  65 #endif
  66 #ifdef HAVE_MALLINFO
  67         struct mallinfo malloc_info;
  68 #endif
  69         struct timeval time_end;
  70
  71         if ((rfs->flags & RESIZE_DEBUG_RTRACK) == 0)
  72                 return;
  73
  74         gettimeofday(&time_end, 0);
  75
  76         if (track->desc)
  77                 printf("%s: ", track->desc);
  78
  79 #ifdef HAVE_MALLINFO
  80 #define kbytes(x)       (((unsigned long)(x) + 1023) / 1024)
  81
  82         malloc_info = mallinfo();
  83         printf("Memory used: %luk/%luk (%luk/%luk), ",
  84                 kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
  85                 kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
  86 #else
  87         printf("Memory used: %lu, ",
  88                 (unsigned long) (((char *) sbrk(0)) -
  89                                  ((char *) track->brk_start)));
  90 #endif
  91 #ifdef HAVE_GETRUSAGE
  92         getrusage(RUSAGE_SELF, &r);
  93
  94         printf("time: %5.2f/%5.2f/%5.2f\n",
  95                 timeval_subtract(&time_end, &track->time_start),
  96                 timeval_subtract(&r.ru_utime, &track->user_start),
  97                 timeval_subtract(&r.ru_stime, &track->system_start));
  98 #else
  99         printf("elapsed time: %6.3f\n",
 100                 timeval_subtract(&time_end, &track->time_start));
 101 #endif
 102 #define mbytes(x)       (((x) + 1048575) / 1048576)
 103         if (channel && channel->manager && channel->manager->get_stats) {
 104                 io_stats delta = 0;
 105                 unsigned long long bytes_read = 0;
 106                 unsigned long long bytes_written = 0;
 107
 108                 channel->manager->get_stats(channel, &delta);
 109                 if (delta) {
 110                         bytes_read = delta->bytes_read - track->bytes_read;
 111                         bytes_written = delta->bytes_written -
 112                                 track->bytes_written;
 113                         if (bytes_read == 0 && bytes_written == 0)
 114                                 goto skip_io;
 115                         if (track->desc)
 116                                 printf("%s: ", track->desc);
 117                         printf("I/O read: %lluMB, write: %lluMB, "
 118                                "rate: %.2fMB/s\n",
 119                                mbytes(bytes_read),
 120                                mbytes(bytes_written),
 121                                (double)mbytes(bytes_read + bytes_written) /
 122                                timeval_subtract(&time_end, &track->time_start));
 123                 }
 124         }
 125 skip_io:
 126         fflush(stdout);
 127 }
 128