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-rw-r--r--libpagemap/procrank.cpp612
1 files changed, 612 insertions, 0 deletions
diff --git a/libpagemap/procrank.cpp b/libpagemap/procrank.cpp
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+++ b/libpagemap/procrank.cpp
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+//
+// 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 <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <pagemap/pagemap.h>
+
+struct proc_info {
+ pid_t pid;
+ pm_memusage_t usage;
+ uint64_t wss;
+ int oomadj;
+};
+
+static void usage(char *myname);
+static std::string getprocname(pid_t pid);
+static int getoomadj(pid_t pid);
+static bool getminfree(std::vector<uint64_t>* minfree, std::vector<int>* adj);
+static int numcmp(uint64_t a, uint64_t b);
+
+#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);
+declare_sort(oomadj);
+
+int (*compfn)(const void *a, const void *b);
+static int order;
+
+enum {
+ MEMINFO_TOTAL,
+ MEMINFO_FREE,
+ MEMINFO_BUFFERS,
+ MEMINFO_CACHED,
+ MEMINFO_SHMEM,
+ MEMINFO_SLAB,
+ MEMINFO_SWAP_TOTAL,
+ MEMINFO_SWAP_FREE,
+ MEMINFO_ZRAM_TOTAL,
+ MEMINFO_MAPPED,
+ MEMINFO_VMALLOC_USED,
+ MEMINFO_PAGE_TABLES,
+ MEMINFO_KERNEL_STACK,
+ MEMINFO_COUNT
+};
+
+void get_mem_info(uint64_t mem[]) {
+ char buffer[1024];
+ unsigned int numFound = 0;
+
+ int fd = open("/proc/meminfo", O_RDONLY);
+
+ if (fd < 0) {
+ printf("Unable to open /proc/meminfo: %s\n", strerror(errno));
+ return;
+ }
+
+ const int len = read(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+
+ if (len < 0) {
+ printf("Empty /proc/meminfo");
+ return;
+ }
+ buffer[len] = 0;
+
+ static const char* const tags[] = {
+ "MemTotal:",
+ "MemFree:",
+ "Buffers:",
+ "Cached:",
+ "Shmem:",
+ "Slab:",
+ "SwapTotal:",
+ "SwapFree:",
+ "ZRam:", // not read from meminfo but from /sys/block/zram0
+ "Mapped:",
+ "VmallocUsed:",
+ "PageTables:",
+ "KernelStack:",
+ NULL
+ };
+ static const int tagsLen[] = {
+ 9,
+ 8,
+ 8,
+ 7,
+ 6,
+ 5,
+ 10,
+ 9,
+ 5,
+ 7,
+ 12,
+ 11,
+ 12,
+ 0
+ };
+
+ char* p = buffer;
+ while (*p && (numFound < (sizeof(tagsLen) / sizeof(tagsLen[0])))) {
+ int i = 0;
+ while (tags[i]) {
+ if (strncmp(p, tags[i], tagsLen[i]) == 0) {
+ p += tagsLen[i];
+ while (*p == ' ') p++;
+ char* num = p;
+ while (*p >= '0' && *p <= '9') p++;
+ if (*p != 0) {
+ *p = 0;
+ p++;
+ }
+ mem[i] = atoll(num);
+ numFound++;
+ break;
+ }
+ i++;
+ }
+ while (*p && *p != '\n') {
+ p++;
+ }
+ if (*p) p++;
+ }
+}
+
+static uint64_t get_zram_mem_used() {
+#define ZRAM_SYSFS "/sys/block/zram0/"
+ FILE *f = fopen(ZRAM_SYSFS "mm_stat", "r");
+ if (f) {
+ uint64_t mem_used_total = 0;
+
+ int matched = fscanf(f, "%*d %*d %" SCNu64 " %*d %*d %*d %*d", &mem_used_total);
+ if (matched != 1)
+ fprintf(stderr, "warning: failed to parse " ZRAM_SYSFS "mm_stat\n");
+
+ fclose(f);
+ return mem_used_total;
+ }
+
+ f = fopen(ZRAM_SYSFS "mem_used_total", "r");
+ if (f) {
+ uint64_t mem_used_total = 0;
+
+ int matched = fscanf(f, "%" SCNu64, &mem_used_total);
+ if (matched != 1)
+ fprintf(stderr, "warning: failed to parse " ZRAM_SYSFS "mem_used_total\n");
+
+ fclose(f);
+ return mem_used_total;
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ pm_kernel_t *ker;
+ pm_process_t *proc;
+ pid_t *pids;
+ size_t num_procs;
+ uint64_t total_pss;
+ uint64_t total_uss;
+ uint64_t total_swap;
+ uint64_t total_pswap;
+ uint64_t total_uswap;
+ uint64_t total_zswap;
+ int error;
+ bool has_swap = false, has_zram = false;
+ uint64_t required_flags = 0;
+ uint64_t flags_mask = 0;
+
+ int arg;
+ size_t i;
+
+ enum {
+ WS_OFF,
+ WS_ONLY,
+ WS_RESET,
+ } ws;
+
+ uint64_t mem[MEMINFO_COUNT] = { };
+ pm_proportional_swap_t *p_swap;
+ float zram_cr = 0.0;
+
+ signal(SIGPIPE, SIG_IGN);
+ compfn = &sort_by_pss;
+ order = -1;
+ ws = WS_OFF;
+ bool oomadj = false;
+
+ for (arg = 1; arg < argc; arg++) {
+ if (!strcmp(argv[arg], "-v")) { compfn = &sort_by_vss; continue; }
+ if (!strcmp(argv[arg], "-r")) { compfn = &sort_by_rss; continue; }
+ if (!strcmp(argv[arg], "-p")) { compfn = &sort_by_pss; continue; }
+ if (!strcmp(argv[arg], "-u")) { compfn = &sort_by_uss; continue; }
+ if (!strcmp(argv[arg], "-s")) { compfn = &sort_by_swap; continue; }
+ if (!strcmp(argv[arg], "-o")) { compfn = &sort_by_oomadj; oomadj = true; continue; }
+ if (!strcmp(argv[arg], "-c")) { required_flags = 0; flags_mask = KPF_SWAPBACKED; continue; }
+ if (!strcmp(argv[arg], "-C")) { required_flags = flags_mask = KPF_SWAPBACKED; continue; }
+ if (!strcmp(argv[arg], "-k")) { required_flags = flags_mask = KPF_KSM; continue; }
+ if (!strcmp(argv[arg], "-w")) { ws = WS_ONLY; continue; }
+ if (!strcmp(argv[arg], "-W")) { ws = WS_RESET; continue; }
+ if (!strcmp(argv[arg], "-R")) { order *= -1; continue; }
+ if (!strcmp(argv[arg], "-h")) { usage(argv[0]); exit(0); }
+ fprintf(stderr, "Invalid argument \"%s\".\n", argv[arg]);
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ get_mem_info(mem);
+ p_swap = pm_memusage_pswap_create(mem[MEMINFO_SWAP_TOTAL] * 1024);
+
+ error = pm_kernel_create(&ker);
+ if (error) {
+ fprintf(stderr, "Error creating 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);
+ }
+
+ std::vector<proc_info> procs(num_procs);
+ for (i = 0; i < num_procs; i++) {
+ procs[i].pid = pids[i];
+ procs[i].oomadj = getoomadj(pids[i]);
+ pm_memusage_zero(&procs[i].usage);
+ pm_memusage_pswap_init_handle(&procs[i].usage, p_swap);
+ error = pm_process_create(ker, pids[i], &proc);
+ if (error) {
+ fprintf(stderr, "warning: could not create process interface for %d\n", pids[i]);
+ continue;
+ }
+
+ switch (ws) {
+ case WS_OFF:
+ error = pm_process_usage_flags(proc, &procs[i].usage, flags_mask,
+ required_flags);
+ break;
+ case WS_ONLY:
+ error = pm_process_workingset(proc, &procs[i].usage, 0);
+ break;
+ case WS_RESET:
+ error = pm_process_workingset(proc, NULL, 1);
+ break;
+ }
+
+ if (error) {
+ fprintf(stderr, "warning: could not read usage for %d\n", pids[i]);
+ }
+
+ if (ws != WS_RESET && procs[i].usage.swap) {
+ has_swap = true;
+ }
+
+ pm_process_destroy(proc);
+ }
+
+ free(pids);
+
+ if (ws == WS_RESET) exit(0);
+
+ procs.erase(std::remove_if(procs.begin(),
+ procs.end(),
+ [](auto proc){
+ return proc.usage.vss == 0;
+ }),
+ procs.end());
+
+ qsort(procs.data(), procs.size(), sizeof(procs[0]), compfn);
+
+ if (has_swap) {
+ uint64_t zram_mem_used = get_zram_mem_used();
+ if (zram_mem_used) {
+ mem[MEMINFO_ZRAM_TOTAL] = zram_mem_used/1024;
+ zram_cr = (float) mem[MEMINFO_ZRAM_TOTAL] /
+ (mem[MEMINFO_SWAP_TOTAL] - mem[MEMINFO_SWAP_FREE]);
+ has_zram = true;
+ }
+ }
+
+ printf("%5s ", "PID");
+ if (oomadj) {
+ printf("%5s ", "oom");
+ }
+ if (ws) {
+ printf("%7s %7s %7s ", "WRss", "WPss", "WUss");
+ if (has_swap) {
+ printf("%7s %7s %7s ", "WSwap", "WPSwap", "WUSwap");
+ if (has_zram) {
+ printf("%7s ", "WZSwap");
+ }
+ }
+ } else {
+ printf("%8s %7s %7s %7s ", "Vss", "Rss", "Pss", "Uss");
+ if (has_swap) {
+ printf("%7s %7s %7s ", "Swap", "PSwap", "USwap");
+ if (has_zram) {
+ printf("%7s ", "ZSwap");
+ }
+ }
+ }
+
+ printf("%s\n", "cmdline");
+
+ total_pss = 0;
+ total_uss = 0;
+ total_swap = 0;
+ total_pswap = 0;
+ total_uswap = 0;
+ total_zswap = 0;
+
+ std::vector<uint64_t> lmk_minfree;
+ std::vector<int> lmk_adj;
+ if (oomadj) {
+ getminfree(&lmk_minfree, &lmk_adj);
+ }
+ auto lmk_minfree_it = lmk_minfree.cbegin();
+ auto lmk_adj_it = lmk_adj.cbegin();
+
+ auto print_oomadj_totals = [&](int adj){
+ for (; lmk_adj_it != lmk_adj.cend() && lmk_minfree_it != lmk_minfree.cend() &&
+ adj > *lmk_adj_it; lmk_adj_it++, lmk_minfree_it++) {
+ // Print the cumulative total line
+ printf("%5s ", ""); // pid
+
+ printf("%5s ", ""); // oomadj
+
+ if (ws) {
+ printf("%7s %6" PRIu64 "K %6" PRIu64 "K ",
+ "", total_pss / 1024, total_uss / 1024);
+ } else {
+ printf("%8s %7s %6" PRIu64 "K %6" PRIu64 "K ",
+ "", "", total_pss / 1024, total_uss / 1024);
+ }
+
+ if (has_swap) {
+ printf("%6" PRIu64 "K ", total_swap / 1024);
+ printf("%6" PRIu64 "K ", total_pswap / 1024);
+ printf("%6" PRIu64 "K ", total_uswap / 1024);
+ if (has_zram) {
+ printf("%6" PRIu64 "K ", total_zswap / 1024);
+ }
+ }
+
+ printf("TOTAL for oomadj < %d (%6" PRIu64 "K)\n", *lmk_adj_it, *lmk_minfree_it / 1024);
+ }
+ };
+
+ for (auto& proc: procs) {
+ if (oomadj) {
+ print_oomadj_totals(proc.oomadj);
+ }
+
+ std::string cmdline = getprocname(proc.pid);
+
+ total_pss += proc.usage.pss;
+ total_uss += proc.usage.uss;
+ total_swap += proc.usage.swap;
+
+ printf("%5d ", proc.pid);
+
+ if (oomadj) {
+ printf("%5d ", proc.oomadj);
+ }
+
+ if (ws) {
+ printf("%6zuK %6zuK %6zuK ",
+ proc.usage.rss / 1024,
+ proc.usage.pss / 1024,
+ proc.usage.uss / 1024
+ );
+ } else {
+ printf("%7zuK %6zuK %6zuK %6zuK ",
+ proc.usage.vss / 1024,
+ proc.usage.rss / 1024,
+ proc.usage.pss / 1024,
+ proc.usage.uss / 1024
+ );
+ }
+
+ if (has_swap) {
+ pm_swapusage_t su;
+
+ pm_memusage_pswap_get_usage(&proc.usage, &su);
+ printf("%6zuK ", proc.usage.swap / 1024);
+ printf("%6zuK ", su.proportional / 1024);
+ printf("%6zuK ", su.unique / 1024);
+ total_pswap += su.proportional;
+ total_uswap += su.unique;
+ pm_memusage_pswap_free(&proc.usage);
+ if (has_zram) {
+ size_t zpswap = su.proportional * zram_cr;
+ printf("%6zuK ", zpswap / 1024);
+ total_zswap += zpswap;
+ }
+ }
+
+ printf("%s\n", cmdline.c_str());
+ }
+
+ pm_memusage_pswap_destroy(p_swap);
+
+ if (oomadj) {
+ print_oomadj_totals(INT_MAX);
+ }
+
+ // Print the separator line
+ printf("%5s ", "");
+
+ if (oomadj) {
+ printf("%5s ", "");
+ }
+
+ if (ws) {
+ printf("%7s %7s %7s ", "", "------", "------");
+ } else {
+ printf("%8s %7s %7s %7s ", "", "", "------", "------");
+ }
+
+ if (has_swap) {
+ printf("%7s %7s %7s ", "------", "------", "------");
+ if (has_zram) {
+ printf("%7s ", "------");
+ }
+ }
+
+ printf("%s\n", "------");
+
+ // Print the total line
+ printf("%5s ", "");
+
+ if (oomadj) {
+ printf("%5s ", "");
+ }
+
+ if (ws) {
+ printf("%7s %6" PRIu64 "K %6" PRIu64 "K ",
+ "", total_pss / 1024, total_uss / 1024);
+ } else {
+ printf("%8s %7s %6" PRIu64 "K %6" PRIu64 "K ",
+ "", "", total_pss / 1024, total_uss / 1024);
+ }
+
+ if (has_swap) {
+ printf("%6" PRIu64 "K ", total_swap / 1024);
+ printf("%6" PRIu64 "K ", total_pswap / 1024);
+ printf("%6" PRIu64 "K ", total_uswap / 1024);
+ if (has_zram) {
+ printf("%6" PRIu64 "K ", total_zswap / 1024);
+ }
+ }
+
+ printf("TOTAL\n");
+
+ printf("\n");
+
+ if (has_swap) {
+ printf("ZRAM: %" PRIu64 "K physical used for %" PRIu64 "K in swap "
+ "(%" PRIu64 "K total swap)\n",
+ mem[MEMINFO_ZRAM_TOTAL], (mem[MEMINFO_SWAP_TOTAL] - mem[MEMINFO_SWAP_FREE]),
+ mem[MEMINFO_SWAP_TOTAL]);
+ }
+ printf(" RAM: %" PRIu64 "K total, %" PRIu64 "K free, %" PRIu64 "K buffers, "
+ "%" PRIu64 "K cached, %" PRIu64 "K shmem, %" PRIu64 "K slab\n",
+ mem[MEMINFO_TOTAL], mem[MEMINFO_FREE], mem[MEMINFO_BUFFERS],
+ mem[MEMINFO_CACHED], mem[MEMINFO_SHMEM], mem[MEMINFO_SLAB]);
+
+ return 0;
+}
+
+static void usage(char *myname) {
+ fprintf(stderr, "Usage: %s [ -W ] [ -v | -r | -p | -u | -s | -h ]\n"
+ " -v Sort by VSS.\n"
+ " -r Sort by RSS.\n"
+ " -p Sort by PSS.\n"
+ " -u Sort by USS.\n"
+ " -s Sort by swap.\n"
+ " (Default sort order is PSS.)\n"
+ " -R Reverse sort order (default is descending).\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"
+ " -w Display statistics for working set only.\n"
+ " -W Reset working set of all processes.\n"
+ " -o Show and sort by oom score against lowmemorykiller thresholds.\n"
+ " -h Display this help screen.\n",
+ myname);
+}
+
+// Get the process name for a given PID.
+static std::string getprocname(pid_t pid) {
+ std::string filename = android::base::StringPrintf("/proc/%d/cmdline", pid);
+
+ std::string procname;
+
+ if (!android::base::ReadFileToString(filename, &procname)) {
+ // The process went away before we could read its process name.
+ procname = "<unknown>";
+ }
+
+ return procname;
+}
+
+static int getoomadj(pid_t pid) {
+ std::string filename = android::base::StringPrintf("/proc/%d/oom_score_adj", pid);
+ std::string oomadj;
+
+ if (!android::base::ReadFileToString(filename, &oomadj)) {
+ return -1001;
+ }
+
+ return strtol(oomadj.c_str(), NULL, 10);
+}
+
+static bool getminfree(std::vector<uint64_t>* minfree, std::vector<int>* adj) {
+ std::string minfree_str;
+ std::string adj_str;
+
+ if (!android::base::ReadFileToString("/sys/module/lowmemorykiller/parameters/minfree", &minfree_str)) {
+ return false;
+ }
+
+ if (!android::base::ReadFileToString("/sys/module/lowmemorykiller/parameters/adj", &adj_str)) {
+ return false;
+ }
+
+ std::vector<std::string> minfree_vec = android::base::Split(minfree_str, ",");
+ std::vector<std::string> adj_vec = android::base::Split(adj_str, ",");
+
+ minfree->clear();
+ minfree->resize(minfree_vec.size());
+ adj->clear();
+ adj->resize(adj_vec.size());
+
+ std::transform(minfree_vec.begin(), minfree_vec.end(), minfree->begin(),
+ [](const std::string& s) -> uint64_t {
+ return strtoull(s.c_str(), NULL, 10) * PAGE_SIZE;
+ });
+
+ std::transform(adj_vec.begin(), adj_vec.end(), adj->begin(),
+ [](const std::string& s) -> int {
+ return strtol(s.c_str(), NULL, 10);
+ });
+
+ return true;
+}
+
+static int numcmp(uint64_t a, uint64_t b) {
+ if (a < b) return -1;
+ if (a > b) return 1;
+ return 0;
+}
+
+static int snumcmp(int64_t a, int64_t b) {
+ if (a < b) return -1;
+ if (a > b) return 1;
+ return 0;
+}
+
+#define create_sort(field, compfn) \
+ static int sort_by_ ## field (const void *a, const void *b) { \
+ return order * compfn( \
+ ((struct proc_info*)(a))->usage.field, \
+ ((struct proc_info*)(b))->usage.field \
+ ); \
+ }
+
+create_sort(vss, numcmp)
+create_sort(rss, numcmp)
+create_sort(pss, numcmp)
+create_sort(uss, numcmp)
+create_sort(swap, numcmp)
+
+static int sort_by_oomadj (const void *a, const void *b) {
+ // Negative oomadj is higher priority, reverse the sort order
+ return -1 * order * snumcmp(
+ ((struct proc_info*)a)->oomadj,
+ ((struct proc_info*)b)->oomadj
+ );
+}
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