/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <pagemap/pagemap.h>
/* Information about a single mapping */
struct map_info {
pm_map_t *map;
pm_memusage_t usage;
/* page counts */
unsigned long shared_clean;
unsigned long shared_dirty;
unsigned long private_clean;
unsigned long private_dirty;
};
/* display the help screen */
static void usage(const char *cmd);
/* qsort compare function to compare maps by PSS */
int comp_pss(const void *a, const void *b);
int main(int argc, char *argv[]) {
pid_t pid;
/* libpagemap context */
pm_kernel_t *ker;
int pagesize; /* cached for speed */
pm_process_t *proc;
/* maps and such */
pm_map_t **maps; int num_maps;
struct map_info **mis;
struct map_info *mi;
/* pagemap information */
uint64_t *pagemap; int num_pages;
unsigned long address; uint64_t mapentry;
uint64_t count, flags;
/* totals */
unsigned long total_shared_clean, total_shared_dirty, total_private_clean, total_private_dirty;
pm_memusage_t total_usage;
/* command-line options */
int ws;
#define WS_OFF (0)
#define WS_ONLY (1)
#define WS_RESET (2)
int (*compfn)(const void *a, const void *b);
int hide_zeros;
/* temporary variables */
int i, j;
char *endptr;
int error;
if (argc < 2) {
usage(argv[0]);
exit(EXIT_FAILURE);
}
ws = WS_OFF;
compfn = NULL;
hide_zeros = 0;
for (i = 1; i < argc - 1; i++) {
if (!strcmp(argv[i], "-w")) { ws = WS_ONLY; continue; }
if (!strcmp(argv[i], "-W")) { ws = WS_RESET; continue; }
if (!strcmp(argv[i], "-m")) { compfn = NULL; continue; }
if (!strcmp(argv[i], "-p")) { compfn = &comp_pss; continue; }
if (!strcmp(argv[i], "-h")) { hide_zeros = 1; continue; }
fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]);
usage(argv[0]);
exit(EXIT_FAILURE);
}
pid = (pid_t)strtol(argv[argc - 1], &endptr, 10);
if (*endptr != '\0') {
fprintf(stderr, "Invalid PID \"%s\".\n", argv[argc - 1]);
exit(EXIT_FAILURE);
}
error = pm_kernel_create(&ker);
if (error) {
fprintf(stderr, "error creating kernel interface -- "
"does this kernel have pagemap?\n");
exit(EXIT_FAILURE);
}
pagesize = pm_kernel_pagesize(ker);
error = pm_process_create(ker, pid, &proc);
if (error) {
fprintf(stderr, "error creating process interface -- "
"does process %d really exist?\n", pid);
exit(EXIT_FAILURE);
}
if (ws == WS_RESET) {
error = pm_process_workingset(proc, NULL, 1);
if (error) {
fprintf(stderr, "error resetting working set for process.\n");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
/* get maps, and allocate our map_info array */
error = pm_process_maps(proc, &maps, &num_maps);
if (error) {
fprintf(stderr, "error listing maps.\n");
exit(EXIT_FAILURE);
}
mis = (struct map_info **)calloc(num_maps, sizeof(struct map_info *));
if (!mis) {
fprintf(stderr, "error allocating map_info array: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
/* print header */
if (ws == WS_ONLY) {
printf("%7s %7s %7s %7s %7s %7s %7s %s\n",
"WRss", "WPss", "WUss", "WShCl", "WShDi", "WPrCl", "WPrDi", "Name");
printf("%7s %7s %7s %7s %7s %7s %7s %s\n",
"-------", "-------", "-------", "-------", "-------", "-------", "-------", "");
} else {
printf("%7s %7s %7s %7s %7s %7s %7s %7s %s\n",
"Vss", "Rss", "Pss", "Uss", "ShCl", "ShDi", "PrCl", "PrDi", "Name");
printf("%7s %7s %7s %7s %7s %7s %7s %7s %s\n",
"-------", "-------", "-------", "-------", "-------", "-------", "-------", "-------", "");
}
/* zero things */
pm_memusage_zero(&total_usage);
total_shared_clean = total_shared_dirty = total_private_clean = total_private_dirty = 0;
for (i = 0; i < num_maps; i++) {
mi = (struct map_info *)calloc(1, sizeof(struct map_info));
if (!mi) {
fprintf(stderr, "error allocating map_info: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
mi->map = maps[i];
/* get, and sum, memory usage */
if (ws == WS_ONLY)
error = pm_map_workingset(mi->map, &mi->usage);
else
error = pm_map_usage(mi->map, &mi->usage);
if (error) {
fflush(stdout);
fprintf(stderr, "error getting usage for map.\n");
continue;
}
pm_memusage_add(&total_usage, &mi->usage);
/* get, and sum, individual page counts */
error = pm_map_pagemap(mi->map, &pagemap, &num_pages);
if (error) {
fflush(stdout);
fprintf(stderr, "error getting pagemap for map.\n");
continue;
}
mi->shared_clean = mi->shared_dirty = mi->private_clean = mi->private_dirty = 0;
for (j = 0; j < num_pages; j++) {
address = pm_map_start(mi->map) + j * ker->pagesize;
mapentry = pagemap[j];
if (PM_PAGEMAP_PRESENT(mapentry) && !PM_PAGEMAP_SWAPPED(mapentry)) {
error = pm_kernel_count(ker, PM_PAGEMAP_PFN(mapentry), &count);
if (error) {
fflush(stdout);
fprintf(stderr, "error getting count for frame.\n");
}
error = pm_kernel_flags(ker, PM_PAGEMAP_PFN(mapentry), &flags);
if (error) {
fflush(stdout);
fprintf(stderr, "error getting flags for frame.\n");
}
if ((ws != WS_ONLY) || (flags & PM_PAGE_REFERENCED)) {
if (count > 1) {
if (flags & PM_PAGE_DIRTY)
mi->shared_dirty++;
else
mi->shared_clean++;
} else {
if (flags & PM_PAGE_DIRTY)
mi->private_dirty++;
else
mi->private_clean++;
}
}
}
}
total_shared_clean += mi->shared_clean;
total_shared_dirty += mi->shared_dirty;
total_private_clean += mi->private_clean;
total_private_dirty += mi->private_dirty;
/* add to array */
mis[i] = mi;
}
/* sort the array, if requested (compfn == NULL for original order) */
if (compfn)
qsort(mis, num_maps, sizeof(mis[0]), compfn);
for (i = 0; i < num_maps; i++) {
mi = mis[i];
if ((!mi) || (hide_zeros && !mi->usage.rss))
continue;
if (ws == WS_ONLY) {
printf("%6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %s\n",
(long)mi->usage.rss / 1024,
(long)mi->usage.pss / 1024,
(long)mi->usage.uss / 1024,
mi->shared_clean * pagesize / 1024,
mi->shared_dirty * pagesize / 1024,
mi->private_clean * pagesize / 1024,
mi->private_dirty * pagesize / 1024,
pm_map_name(mi->map)
);
} else {
printf("%6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %s\n",
(long)mi->usage.vss / 1024,
(long)mi->usage.rss / 1024,
(long)mi->usage.pss / 1024,
(long)mi->usage.uss / 1024,
mi->shared_clean * pagesize / 1024,
mi->shared_dirty * pagesize / 1024,
mi->private_clean * pagesize / 1024,
mi->private_dirty * pagesize / 1024,
pm_map_name(mi->map)
);
}
}
/* print totals */
if (ws == WS_ONLY) {
printf("%7s %7s %7s %7s %7s %7s %7s %s\n",
"-------", "-------", "-------", "-------", "-------", "-------", "-------", "");
printf("%6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %s\n",
(long)total_usage.rss / 1024,
(long)total_usage.pss / 1024,
(long)total_usage.uss / 1024,
total_shared_clean * pagesize / 1024,
total_shared_dirty * pagesize / 1024,
total_private_clean * pagesize / 1024,
total_private_dirty * pagesize / 1024,
"TOTAL"
);
} else {
printf("%7s %7s %7s %7s %7s %7s %7s %7s %s\n",
"-------", "-------", "-------", "-------", "-------", "-------", "-------", "-------", "");
printf("%6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %6ldK %s\n",
(long)total_usage.vss / 1024,
(long)total_usage.rss / 1024,
(long)total_usage.pss / 1024,
(long)total_usage.uss / 1024,
total_shared_clean * pagesize / 1024,
total_shared_dirty * pagesize / 1024,
total_private_clean * pagesize / 1024,
total_private_dirty * pagesize / 1024,
"TOTAL"
);
}
return 0;
}
static void usage(const char *cmd) {
fprintf(stderr, "Usage: %s [ -w | -W ] [ -p | -m ] [ -h ] pid\n"
" -w Displays statistics for the working set only.\n"
" -W Resets the working set of the process.\n"
" -p Sort by PSS.\n"
" -m Sort by mapping order (as read from /proc).\n"
" -h Hide maps with no RSS.\n",
cmd);
}
int comp_pss(const void *a, const void *b) {
struct map_info *ma, *mb;
ma = *((struct map_info **)a);
mb = *((struct map_info **)b);
if (mb->usage.pss < ma->usage.pss) return -1;
if (mb->usage.pss > ma->usage.pss) return 1;
return 0;
}