git.itanic.dy.fi Git - scan-pagemap/blob - analyze.c

   1 #include <string.h>
   2 #include <stdio.h>
   3
   4 #include "analyze.h"
   5 #include "utils.h"
   6 #include "bintree.h"
   7
   8 #define SI_k    1024ll
   9 #define SI_M    (SI_k * SI_k)
  10 #define SI_G    (SI_M * SI_k)
  11
  12 #define PRETTY_THRESH   100
  13 #define NICE_DIV(a)                                                     \
  14         ((a) < SI_k * PRETTY_THRESH ? (a) :                             \
  15                 (a < SI_M * PRETTY_THRESH ? ((a) / SI_k) :              \
  16                         (a < SI_G * PRETTY_THRESH ? ((a) / SI_M) :      \
  17                                 ((a) / SI_G))))
  18
  19 #define NICE_UNIT(a)                                                    \
  20         ((a) < (SI_k * PRETTY_THRESH) ? " " :                           \
  21                 ((a) < (SI_M * PRETTY_THRESH) ? "k" :                   \
  22                         ((a) < (SI_G * PRETTY_THRESH) ? "M" : "G")))
  23
  24 #define PAGE_TO_NICE(a)         NICE_DIV((long long)a * PAGE_SIZE)
  25 #define PAGE_TO_NICE_UNIT(a)    NICE_UNIT((long long)a * PAGE_SIZE)
  26
  27 struct analyze_frames {
  28         struct bintree_ops ops;
  29         long int pages_present;
  30         long int pages_swapped;
  31         long int pages_unused;
  32         int pid;
  33 };
  34
  35 #define bintree_ops_to_af(bintree_ops)                          \
  36         container_of((bintree_ops), struct analyze_frames, ops)
  37
  38 static void count_pages(struct bintree *b, struct bintree_ops *ops)
  39 {
  40         struct pageframe *pf = tree_to_pageframe(b);
  41         struct analyze_frames *af = bintree_ops_to_af(ops);
  42         struct maps_list *ml;
  43
  44         if (af->pid) {
  45                 if (!pf->ml)
  46                         return;
  47                 list_for_each_entry(ml, &pf->ml->list, list) {
  48                         if (ml->map->pid == af->pid)
  49                                 goto get_stats;
  50                 }
  51                 return;
  52         }
  53
  54 get_stats:
  55         if (pf->page_present) {
  56                 af->pages_present++;
  57         } else if (pf->page_swapped) {
  58                 af->pages_swapped++;
  59         } else {
  60                 af->pages_unused++;
  61         }
  62 }
  63
  64 /*
  65  * print_page_stats - Prints system wide page stats
  66  */
  67 void print_page_stats(struct pageframe *pf)
  68 {
  69         struct analyze_frames af;
  70         long count;
  71         memset(&af, 0, sizeof(af));
  72
  73         af.ops.callback = count_pages;
  74
  75         count = bintree_walk(&pf->tree, &af.ops);
  76         printf("present pages: %ld, %lld %sB\n"
  77                 "Swapped pages: %ld, %lld %sB\n"
  78                 "Unused pages: %ld, %lld %sB\n"
  79                 "Total %ld physical pages, %lld %sB\n",
  80                 af.pages_present,
  81                 PAGE_TO_NICE(af.pages_present),
  82                 PAGE_TO_NICE_UNIT(af.pages_present),
  83                 af.pages_swapped,
  84                 PAGE_TO_NICE(af.pages_swapped),
  85                 PAGE_TO_NICE_UNIT(af.pages_swapped),
  86                 af.pages_unused,
  87                 PAGE_TO_NICE(af.pages_unused),
  88                 PAGE_TO_NICE_UNIT(af.pages_unused),
  89                 count,
  90                 PAGE_TO_NICE(count),
  91                 PAGE_TO_NICE_UNIT(count));
  92 }
  93
  94 void print_pid_stats(struct pageframe *pf, struct process *process_list)
  95 {
  96         struct analyze_frames af;
  97         struct process *ps;
  98         long int swapped, present, total;
  99         long int biggest = 0, second_biggest;
 100         int count, processes = 0;
 101
 102         /*
 103          * walk through all processes, find the one with most present
 104          * pages
 105          */
 106         list_for_each_entry(ps, &process_list->list, list) {
 107                 memset(&af, 0, sizeof(af));
 108                 af.ops.callback = count_pages;
 109                 af.pid = ps->pid;
 110
 111                 bintree_walk(&pf->tree, &af.ops);
 112                 ps->pages_present = af.pages_present;
 113                 ps->pages_swapped = af.pages_swapped;
 114                 biggest = MAX(biggest, ps->pages_present + ps->pages_swapped);
 115         }
 116
 117         printf("   in ram   swapped   pid   tid name\n");
 118
 119 restart:
 120         second_biggest = 0;
 121         count = 0;
 122         list_for_each_entry(ps, &process_list->list, list) {
 123
 124                 present = ps->pages_present;
 125                 swapped = ps->pages_swapped;
 126                 total = present + swapped;
 127
 128                 second_biggest = (total < biggest) &&
 129                         (second_biggest < total) ?
 130                         total : second_biggest;
 131
 132                 if (total != biggest)
 133                         continue;
 134
 135                 if (total == 0)
 136                         continue;
 137
 138                 printf("%6lld %sB %6lld %sB %5d %5d %s\n",
 139                         PAGE_TO_NICE(present), PAGE_TO_NICE_UNIT(present),
 140                         PAGE_TO_NICE(swapped), PAGE_TO_NICE_UNIT(swapped),
 141                         ps->pid, ps->tid,ps->name);
 142                 count++;
 143                 processes++;
 144         }
 145
 146         if (count > 0) {
 147                 biggest = second_biggest;
 148                 goto restart;
 149         }
 150
 151         printf("Total %d processes\n", processes);
 152 }