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

   1 /*
   2  * Copyright (C) 2010 Timo Kokkonen <kaapeli@itanic.dy.fi>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16  */
  17
  18 #include <string.h>
  19 #include <stdio.h>
  20
  21 #include "analyze.h"
  22 #include "utils.h"
  23 #include "bintree.h"
  24
  25 struct kpageflag_str kpageflag_str[] = {
  26         { .flag = LOCKED,               .str = "locked", },
  27         { .flag = ERROR,                .str = "error", },
  28         { .flag = REFERENCED,           .str = "referenced", },
  29         { .flag = UPTODATE,             .str = "uptodate", },
  30         { .flag = DIRTY,                .str = "dirty", },
  31         { .flag = LRU,                  .str = "lru", },
  32         { .flag = ACTIVE,               .str = "active", },
  33         { .flag = SLAB,                 .str = "slab", },
  34         { .flag = WRITEBACK,            .str = "writeback", },
  35         { .flag = RECLAIM,              .str = "reclaim", },
  36         { .flag = BUDDY,                .str = "buddy", },
  37         { .flag = MMAP,                 .str = "mmap", },
  38         { .flag = ANON,                 .str = "anon", },
  39         { .flag = SWAPCACHE,            .str = "swapcache", },
  40         { .flag = SWAPBACKED,           .str = "swapbacked", },
  41         { .flag = COMPOUND_HEAD,        .str = "compound_head", },
  42         { .flag = COMPOUND_TAIL,        .str = "compound_tail", },
  43         { .flag = HUGE,                 .str = "huge", },
  44         { .flag = UNEVICTABLE,          .str = "unevictable", },
  45         { .flag = HWPOISON,             .str = "hwpoison", },
  46         { .flag = NOPAGE,               .str = "nopage", },
  47         { .flag = KSM,                  .str = "ksm", },
  48 };
  49
  50 #define SI_k    1024ll
  51 #define SI_M    (SI_k * SI_k)
  52 #define SI_G    (SI_M * SI_k)
  53
  54 #define PRETTY_THRESH   97
  55 #define NICE_DIV(a)                                                     \
  56         ((a) < SI_k * 4 ? (a) :                         \
  57                 (a < SI_M * PRETTY_THRESH ? ((a) / SI_k) :              \
  58                         (a < SI_G * PRETTY_THRESH ? ((a) / SI_M) :      \
  59                                 ((a) / SI_G))))
  60
  61 #define NICE_UNIT(a)                                                    \
  62         ((a) < (SI_k * 4) ? " " :                               \
  63                 ((a) < (SI_M * PRETTY_THRESH) ? "k" :                   \
  64                         ((a) < (SI_G * PRETTY_THRESH) ? "M" : "G")))
  65
  66 #define PAGE_TO_NICE(a)         NICE_DIV((long long)a * PAGE_SIZE)
  67 #define PAGE_TO_NICE_UNIT(a)    NICE_UNIT((long long)a * PAGE_SIZE)
  68
  69 struct analyze_frames {
  70         struct bintree_ops ops;
  71
  72         int pid;
  73
  74         struct list_head *pidlist;
  75         struct maps *map;
  76         int pids;
  77
  78         /* General counters */
  79         long int pages_present;
  80         long int pages_swapped;
  81         long int pages_unique;
  82
  83         /* kpageflag stats counters */
  84         long int kpageflag[KPAGEFLAGS_NUM];
  85 };
  86
  87 #define bintree_ops_to_af(bintree_ops)                          \
  88         container_of((bintree_ops), struct analyze_frames, ops)
  89
  90 static void count_pages(struct bintree *b, struct bintree_ops *ops)
  91 {
  92         struct pageframe *pf = tree_to_pageframe(b);
  93         struct analyze_frames *af = bintree_ops_to_af(ops);
  94         struct maps_list *ml;
  95         int i;
  96
  97         if (af->pid) {
  98                 /* Find pages which reference at least once a pid */
  99                 list_for_each_entry(ml, &pf->ml, list) {
 100                         if (ml->map->pid == af->pid)
 101                                 goto get_stats;
 102                 }
 103                 return;
 104         } else if (af->pidlist && af->map) {
 105                 /*
 106                  * Find pages that reference at least once all of the
 107                  * given pids and a given mapping
 108                  */
 109                 struct pidlist *pid;
 110                 int matches = 0;
 111
 112                 /*
 113                  * Check that we reference the given mapping at least
 114                  * once
 115                  */
 116                 list_for_each_entry(ml, &pf->ml, list) {
 117                         if (ml->map == af->map) {
 118                                 matches++;
 119                                 break;
 120                         }
 121                 }
 122
 123                 if (!matches)
 124                         return;
 125                 matches = 0;
 126
 127                 /*
 128                  * Check that we reference all of the given pids
 129                  * too. The order of the loops is important here. We
 130                  * must scan through all the references and test for a
 131                  * given pid. If we would iterate through the
 132                  * references in the outer loop, we might get
 133                  * duplicate matches for a pid since it is possible
 134                  * that a page is mapped multiple times in a process's
 135                  * addrses space.
 136                  */
 137                 list_for_each_entry(pid, af->pidlist, list) {
 138                         list_for_each_entry(ml, &pf->ml, list) {
 139                                 if (ml->map->pid == pid->pid) {
 140                                         matches++;
 141                                         break;
 142                                 }
 143                         }
 144
 145                         /*
 146                          * If we have found as many matches as ther
 147                          * are pids, we will count the stats
 148                          */
 149                         if (matches == af->pids)
 150                                 goto get_stats;
 151                 }
 152                 return;
 153         }
 154
 155 get_stats:
 156         if (page_present(pf))
 157                 af->pages_present++;
 158         else if (page_swapped(pf))
 159                 af->pages_swapped++;
 160         if (pf->kpagecount == 1)
 161                 af->pages_unique++;
 162
 163         for (i = 0; i < KPAGEFLAGS_NUM; i++)
 164                 if (kpageflag_is_set(pf, i))
 165                         af->kpageflag[i]++;
 166 }
 167
 168 /*
 169  * print_page_stats - Prints system wide page stats
 170  */
 171 void print_page_stats(struct pageframe *pf)
 172 {
 173         struct analyze_frames af;
 174         long count;
 175         int i;
 176         memset(&af, 0, sizeof(af));
 177
 178         af.ops.callback = count_pages;
 179
 180         count = bintree_walk(&pf->tree, &af.ops);
 181
 182         for (i = 0; i < KPAGEFLAGS_NUM; i++) {
 183                 if (!af.kpageflag[i])
 184                         continue;
 185
 186                 printf("%13s pages: %6ld, %5lld %sB\n",
 187                         kpageflag_to_str(i),
 188                         af.kpageflag[i],
 189                         PAGE_TO_NICE(af.kpageflag[i]),
 190                         PAGE_TO_NICE_UNIT(af.kpageflag[i]));
 191         }
 192
 193         printf("      present pages: %6ld, %5lld %sB\n"
 194                 "      swapped pages: %6ld, %5lld %sB\n"
 195                 "       unique pages: %6ld, %5lld %sB\n"
 196                 "        total pages: %6ld, %5lld %sB\n",
 197                 af.pages_present,
 198                 PAGE_TO_NICE(af.pages_present),
 199                 PAGE_TO_NICE_UNIT(af.pages_present),
 200                 af.pages_swapped,
 201                 PAGE_TO_NICE(af.pages_swapped),
 202                 PAGE_TO_NICE_UNIT(af.pages_swapped),
 203                 af.pages_unique,
 204                 PAGE_TO_NICE(af.pages_unique),
 205                 PAGE_TO_NICE_UNIT(af.pages_unique),
 206                 count,
 207                 PAGE_TO_NICE(count),
 208                 PAGE_TO_NICE_UNIT(count));
 209 }
 210
 211 void print_pid_stats(struct pageframe *pf, struct process *process_list,
 212                 struct parse_opts *opts)
 213 {
 214         struct analyze_frames af;
 215         struct process *ps;
 216         long int swapped, present, unique, total;
 217         long int biggest = 0, second_biggest;
 218         int count, processes = 0;
 219
 220         /*
 221          * walk through all processes, find the one with most present
 222          * pages
 223          */
 224         list_for_each_entry(ps, &process_list->list, list) {
 225                 memset(&af, 0, sizeof(af));
 226                 af.ops.callback = count_pages;
 227                 af.pid = ps->pid;
 228
 229                 bintree_walk(&pf->tree, &af.ops);
 230                 ps->pages_present = af.pages_present;
 231                 ps->pages_swapped = af.pages_swapped;
 232                 ps->pages_unique  = af.pages_unique;
 233                 biggest = MAX(biggest, ps->pages_present + ps->pages_swapped);
 234         }
 235
 236         printf("     RSS  swapped      USS    total   pid");
 237         if (opts->with_threads)
 238                 printf("   tid");
 239         printf("   name\n");
 240
 241 restart:
 242         second_biggest = 0;
 243         count = 0;
 244         list_for_each_entry(ps, &process_list->list, list) {
 245
 246                 present = ps->pages_present;
 247                 swapped = ps->pages_swapped;
 248                 unique = ps->pages_unique;
 249                 total = present + swapped;
 250
 251                 second_biggest = (total < biggest) &&
 252                         (second_biggest < total) ?
 253                         total : second_biggest;
 254
 255                 if (total != biggest)
 256                         continue;
 257
 258                 if (total == 0)
 259                         continue;
 260
 261                 printf("%5lld %sB %5lld %sB %5lld %sB %5lld %sB %5d ",
 262                         PAGE_TO_NICE(present), PAGE_TO_NICE_UNIT(present),
 263                         PAGE_TO_NICE(swapped), PAGE_TO_NICE_UNIT(swapped),
 264                         PAGE_TO_NICE(unique), PAGE_TO_NICE_UNIT(unique),
 265                         PAGE_TO_NICE(total), PAGE_TO_NICE_UNIT(total),
 266                         ps->pid);
 267
 268                 if (opts->with_threads)
 269                         printf("%5d ", ps->tid);
 270
 271                 printf("%c %s\n",
 272                         ps->is_initial_pid ? '*' : ' ',
 273                         ps->name);
 274
 275                 count++;
 276                 processes++;
 277         }
 278
 279         if (count > 0) {
 280                 biggest = second_biggest;
 281                 goto restart;
 282         }
 283
 284         printf("Total %d processes\n", processes);
 285 }
 286
 287 static void _dump_process_maps(struct pageframe *pf, struct process *ps,
 288                         struct parse_opts *opts)
 289 {
 290         struct maps *map;
 291         long int swapped, present, total;
 292         long int biggest = 0, second_biggest;
 293         int count, processes = 0, pids = 0;
 294
 295         if (is_parse_option(opts, PARSE_SHARED_MAPPING)) {
 296                 struct pidlist *pid;
 297                 list_for_each_entry(pid, &opts->pidlist, list)
 298                         pids++;
 299         }
 300
 301         list_for_each_entry(map, &ps->maps->list, list) {
 302                 struct analyze_frames af;
 303
 304                 if (is_parse_option(opts, PARSE_SHARED_MAPPING)) {
 305                         memset(&af, 0, sizeof(af));
 306                         af.ops.callback = count_pages;
 307                         af.pidlist = &opts->pidlist;
 308                         af.pids = pids;
 309                         af.map = map;
 310
 311                         bintree_walk(&pf->tree, &af.ops);
 312                         map->pages_present = af.pages_present;
 313                         map->pages_swapped = af.pages_swapped;
 314                 }
 315
 316                 biggest = MAX(biggest, map->pages_present + map->pages_swapped);
 317         }
 318
 319         printf("process: [%d] %s\n", ps->pid, ps->name);
 320         printf("    size      RSS  swapped    total name\n");
 321 restart:
 322         second_biggest = 0;
 323         count = 0;
 324         list_for_each_entry(map, &ps->maps->list, list) {
 325
 326                 present = map->pages_present;
 327                 swapped = map->pages_swapped;
 328                 total = present + swapped;
 329
 330                 second_biggest = (total < biggest) &&
 331                         (second_biggest < total) ?
 332                         total : second_biggest;
 333
 334                 if (total != biggest)
 335                         continue;
 336
 337                 /*
 338                  * Do not print zero sized mappings if
 339                  * --shared-mappings is enabled
 340                  */
 341                 if (is_parse_option(opts, PARSE_SHARED_MAPPING) && total == 0)
 342                         continue;
 343
 344                 printf("%5lld %sB %5lld %sB %5lld %sB %5lld %sB %s\n",
 345                         NICE_DIV(map->size), NICE_UNIT(map->size),
 346                         PAGE_TO_NICE(present), PAGE_TO_NICE_UNIT(present),
 347                         PAGE_TO_NICE(swapped), PAGE_TO_NICE_UNIT(swapped),
 348                         PAGE_TO_NICE(total), PAGE_TO_NICE_UNIT(total),
 349                         map->name);
 350
 351                 count++;
 352                 processes++;
 353         }
 354
 355         if (count > 0 && biggest > 0) {
 356                 biggest = second_biggest;
 357                 goto restart;
 358         }
 359         printf("\n");
 360 }
 361
 362 void dump_process_maps(struct pageframe *pf, struct process *process_list,
 363                 struct parse_opts *opts)
 364 {
 365         struct process *ps;
 366
 367         list_for_each_entry(ps, &process_list->list, list) {
 368                 _dump_process_maps(pf, ps, opts);
 369         }
 370 }