summaryrefslogtreecommitdiff
path: root/libpagemap/librank.c
diff options
context:
space:
mode:
Diffstat (limited to 'libpagemap/librank.c')
-rw-r--r--libpagemap/librank.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/libpagemap/librank.c b/libpagemap/librank.c
new file mode 100644
index 00000000..7aa19881
--- /dev/null
+++ b/libpagemap/librank.c
@@ -0,0 +1,489 @@
+/*
+ * 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 <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <pagemap/pagemap.h>
+
+#define MAX_CMDLINE 256
+
+struct process_info {
+ pid_t pid;
+ char cmdline[MAX_CMDLINE];
+};
+
+struct mapping_info {
+ struct process_info *proc;
+ pm_memusage_t usage;
+};
+
+struct library_info {
+ struct library_info *next;
+ char *name;
+ struct mapping_info **mappings;
+ size_t mappings_count;
+ size_t mappings_size;
+ pm_memusage_t total_usage;
+};
+
+static void usage(char *myname);
+static int getprocname(pid_t pid, char *buf, size_t len);
+static int numcmp(long long a, long long b);
+static int licmp(const void *a, const void *b);
+
+char *library_name_blacklist[] = { "[heap]", "[stack]", "", NULL };
+
+#define declare_sort(field) \
+ static int sort_by_ ## field (const void *a, const void *b)
+
+declare_sort(vss);
+declare_sort(rss);
+declare_sort(pss);
+declare_sort(uss);
+declare_sort(swap);
+
+#define INIT_LIBRARIES 16
+#define INIT_MAPPINGS 4
+
+static int order;
+
+struct library_info **libraries;
+size_t libraries_count;
+size_t libraries_size;
+
+struct library_info *get_library(const char *name, bool all) {
+ size_t i;
+ struct library_info *library;
+
+ if (!all) {
+ for (i = 0; library_name_blacklist[i]; i++)
+ if (!strcmp(name, library_name_blacklist[i]))
+ return NULL;
+ } else {
+ if (name[0] == 0) {
+ name = "[anon]";
+ }
+ }
+
+ for (i = 0; i < libraries_count; i++) {
+ if (!strcmp(libraries[i]->name, name))
+ return libraries[i];
+ }
+
+ if (libraries_size && libraries_count >= libraries_size) {
+ libraries = realloc(libraries, 2 * libraries_size * sizeof(struct library_info *));
+ if (!libraries) {
+ fprintf(stderr, "Couldn't resize libraries array: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ libraries_size = 2 * libraries_size;
+ }
+
+ library = calloc(1, sizeof(*library));
+ if (!library) {
+ fprintf(stderr, "Couldn't allocate space for library struct: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ library->name = malloc(strlen(name) + 1);
+ if (!library->name) {
+ fprintf(stderr, "Couldn't allocate space for library name: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ strcpy(library->name, name);
+ library->mappings = malloc(INIT_MAPPINGS * sizeof(struct mapping_info *));
+ if (!library->mappings) {
+ fprintf(stderr, "Couldn't allocate space for library mappings array: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ library->mappings_count = 0; library->mappings_size = INIT_MAPPINGS;
+ pm_memusage_zero(&library->total_usage);
+
+ libraries[libraries_count++] = library;
+
+ return library;
+}
+
+struct mapping_info *get_mapping(struct library_info *library, struct process_info *proc) {
+ struct mapping_info *mapping;
+ size_t i;
+
+ for (i = 0; i < library->mappings_count; i++) {
+ if (library->mappings[i]->proc == proc)
+ return library->mappings[i];
+ }
+
+ if (library->mappings_size && library->mappings_count >= library->mappings_size) {
+ library->mappings = realloc(library->mappings,
+ 2 * library->mappings_size * sizeof(struct mapping_info*));
+ if (!library->mappings) {
+ fprintf(stderr, "Couldn't resize mappings array: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ library->mappings_size = 2 * library->mappings_size;
+ }
+
+ mapping = calloc(1, sizeof(*mapping));
+ if (!mapping) {
+ fprintf(stderr, "Couldn't allocate space for mapping struct: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ mapping->proc = proc;
+ pm_memusage_zero(&mapping->usage);
+
+ library->mappings[library->mappings_count++] = mapping;
+
+ return mapping;
+}
+
+struct process_info *get_process(pid_t pid) {
+ struct process_info *process;
+
+ process = calloc(1, sizeof(*process));
+ if (!process) {
+ fprintf(stderr, "Couldn't allocate space for process struct: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ process->pid = pid;
+ getprocname(pid, process->cmdline, sizeof(process->cmdline));
+
+ return process;
+}
+
+static int parse_perm(const char *perm)
+{
+ int ret = 0;
+
+ while (*perm) {
+ switch(*perm) {
+ case 'r':
+ ret |= PM_MAP_READ;
+ break;
+ case 'w':
+ ret |= PM_MAP_WRITE;
+ break;
+ case 'x':
+ ret |= PM_MAP_EXEC;
+ break;
+ default:
+ fprintf(stderr, "Unknown permission '%c'\n", *perm);
+ exit(EXIT_FAILURE);
+ }
+ perm++;
+ }
+ return ret;
+}
+
+int main(int argc, char *argv[]) {
+ char *prefix;
+ size_t prefix_len;
+ int (*compfn)(const void *a, const void *b);
+
+ pm_kernel_t *ker;
+ pm_process_t *proc;
+
+ pid_t *pids;
+ size_t num_procs;
+
+ pm_map_t **maps;
+ size_t num_maps;
+ pm_memusage_t map_usage;
+
+ struct library_info *li;
+ struct mapping_info *mi;
+ struct process_info *pi;
+
+ size_t i, j;
+ int error;
+ int perm;
+ bool all;
+ uint64_t required_flags;
+ uint64_t flags_mask;
+
+ bool has_swap = false;
+
+ signal(SIGPIPE, SIG_IGN);
+ compfn = &sort_by_pss;
+ order = -1;
+ prefix = NULL;
+ prefix_len = 0;
+ opterr = 0;
+ perm = 0;
+ all = false;
+ required_flags = 0;
+ flags_mask = 0;
+
+ while (1) {
+ int c;
+ const struct option longopts[] = {
+ {"all", 0, 0, 'a'},
+ {"cached", 0, 0, 'c'},
+ {"nocached", 0, 0, 'C'},
+ {"ksm", 0, 0, 'k'},
+ {"help", 0, 0, 'h'},
+ {"pss", 0, 0, 'p'},
+ {"uss", 0, 0, 'u'},
+ {"vss", 0, 0, 'v'},
+ {"rss", 0, 0, 'r'},
+ {"swap", 0, 0, 's'},
+ {"reverse", 0, 0, 'R'},
+ {"path", required_argument, 0, 'P'},
+ {"perm", required_argument, 0, 'm'},
+ {0, 0, 0, 0}
+ };
+ c = getopt_long(argc, argv, "acChkm:pP:uvrsR", longopts, NULL);
+ if (c < 0) {
+ break;
+ }
+ /* Alphabetical cases */
+ switch (c) {
+ case 'a':
+ all = true;
+ break;
+ case 'c':
+ required_flags = 0;
+ flags_mask = KPF_SWAPBACKED;
+ break;
+ case 'C':
+ required_flags = KPF_SWAPBACKED;
+ flags_mask = KPF_SWAPBACKED;
+ break;
+ case 'k':
+ required_flags = KPF_KSM;
+ flags_mask = KPF_KSM;
+ break;
+ case 'h':
+ usage(argv[0]);
+ exit(EXIT_SUCCESS);
+ case 'm':
+ perm = parse_perm(optarg);
+ break;
+ case 'p':
+ compfn = &sort_by_pss;
+ break;
+ case 'P':
+ prefix = optarg;
+ prefix_len = strlen(prefix);
+ break;
+ case 'u':
+ compfn = &sort_by_uss;
+ break;
+ case 'v':
+ compfn = &sort_by_vss;
+ break;
+ case 'r':
+ compfn = &sort_by_rss;
+ break;
+ case 's':
+ compfn = &sort_by_swap;
+ break;
+ case 'R':
+ order *= -1;
+ break;
+ case '?':
+ fprintf(stderr, "Invalid argument \"%s\".\n", argv[optind - 1]);
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ default:
+ abort();
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ libraries = malloc(INIT_LIBRARIES * sizeof(struct library_info *));
+ libraries_count = 0; libraries_size = INIT_LIBRARIES;
+ pm_memusage_zero(&map_usage);
+
+ error = pm_kernel_create(&ker);
+ if (error) {
+ fprintf(stderr, "Error initializing kernel interface -- "
+ "does this kernel have pagemap?\n");
+ exit(EXIT_FAILURE);
+ }
+
+ error = pm_kernel_pids(ker, &pids, &num_procs);
+ if (error) {
+ fprintf(stderr, "Error listing processes.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for (i = 0; i < num_procs; i++) {
+ error = pm_process_create(ker, pids[i], &proc);
+ if (error) {
+ fprintf(stderr, "warning: could not create process interface for %d\n", pids[i]);
+ continue;
+ }
+
+ pi = get_process(pids[i]);
+
+ error = pm_process_maps(proc, &maps, &num_maps);
+ if (error) {
+ fprintf(stderr, "Error listing maps for process %d.\n", proc->pid);
+ exit(EXIT_FAILURE);
+ }
+
+ for (j = 0; j < num_maps; j++) {
+ if (prefix && (strncmp(pm_map_name(maps[j]), prefix, prefix_len)))
+ continue;
+
+ if (perm && (pm_map_flags(maps[j]) & PM_MAP_PERMISSIONS) != perm)
+ continue;
+
+ li = get_library(pm_map_name(maps[j]), all);
+ if (!li)
+ continue;
+
+ mi = get_mapping(li, pi);
+
+ error = pm_map_usage_flags(maps[j], &map_usage, flags_mask,
+ required_flags);
+ if (error) {
+ fprintf(stderr, "Error getting map memory usage of "
+ "map %s in process %d.\n",
+ pm_map_name(maps[j]), proc->pid);
+ exit(EXIT_FAILURE);
+ }
+
+ if (map_usage.swap) {
+ has_swap = true;
+ }
+
+ pm_memusage_add(&mi->usage, &map_usage);
+ pm_memusage_add(&li->total_usage, &map_usage);
+ }
+ }
+
+ printf(" %6s %7s %6s %6s %6s ", "RSStot", "VSS", "RSS", "PSS", "USS");
+
+ if (has_swap) {
+ printf(" %6s ", "Swap");
+ }
+
+ printf("Name/PID\n");
+ fflush(stdout);
+
+ qsort(libraries, libraries_count, sizeof(libraries[0]), &licmp);
+
+ for (i = 0; i < libraries_count; i++) {
+ li = libraries[i];
+
+ printf("%6zdK %7s %6s %6s %6s ", li->total_usage.pss / 1024, "", "", "", "");
+ if (has_swap) {
+ printf(" %6s ", "");
+ }
+ printf("%s\n", li->name);
+ fflush(stdout);
+
+ qsort(li->mappings, li->mappings_count, sizeof(li->mappings[0]), compfn);
+
+ for (j = 0; j < li->mappings_count; j++) {
+ mi = li->mappings[j];
+ pi = mi->proc;
+ printf( " %6s %7zdK %6zdK %6zdK %6zdK ", "",
+ mi->usage.vss / 1024,
+ mi->usage.rss / 1024,
+ mi->usage.pss / 1024,
+ mi->usage.uss / 1024);
+ if (has_swap) {
+ printf("%6zdK ", mi->usage.swap / 1024);
+ }
+ printf(" %s [%d]\n",
+ pi->cmdline,
+ pi->pid);
+ }
+ printf("\n");
+ fflush(stdout);
+ }
+
+ exit(0);
+}
+
+static void usage(char *myname) {
+ fprintf(stderr, "Usage: %s [ -P | -L ] [ -v | -r | -p | -u | -s | -h ]\n"
+ "\n"
+ "Sort options:\n"
+ " -v Sort processes by VSS.\n"
+ " -r Sort processes by RSS.\n"
+ " -p Sort processes by PSS.\n"
+ " -u Sort processes by USS.\n"
+ " -s Sort processes by swap.\n"
+ " (Default sort order is PSS.)\n"
+ " -a Show all mappings, including stack, heap and anon.\n"
+ " -P /path Limit libraries displayed to those in path.\n"
+ " -R Reverse sort order (default is descending).\n"
+ " -m [r][w][x] Only list pages that exactly match permissions\n"
+ " -c Only show cached (storage backed) pages\n"
+ " -C Only show non-cached (ram/swap backed) pages\n"
+ " -k Only show pages collapsed by KSM\n"
+ " -h Display this help screen.\n",
+ myname);
+}
+
+static int getprocname(pid_t pid, char *buf, size_t len) {
+ char filename[32];
+ FILE *f;
+
+ snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
+ f = fopen(filename, "r");
+ if (!f) {
+ *buf = '\0';
+ return 1;
+ }
+ if (!fgets(buf, len, f)) {
+ *buf = '\0';
+ fclose(f);
+ return 2;
+ }
+ fclose(f);
+ return 0;
+}
+
+static int numcmp(long long a, long long b) {
+ if (a < b) return -1;
+ if (a > b) return 1;
+ return 0;
+}
+
+static int licmp(const void *a, const void *b) {
+ return order * numcmp(
+ (*((struct library_info**)a))->total_usage.pss,
+ (*((struct library_info**)b))->total_usage.pss
+ );
+}
+
+#define create_sort(field, compfn) \
+ static int sort_by_ ## field (const void *a, const void *b) { \
+ return order * compfn( \
+ (*((struct mapping_info**)a))->usage.field, \
+ (*((struct mapping_info**)b))->usage.field \
+ ); \
+ }
+
+create_sort(vss, numcmp)
+create_sort(rss, numcmp)
+create_sort(pss, numcmp)
+create_sort(uss, numcmp)
+create_sort(swap, numcmp)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-16 08:41:45 +0000