v4.19.13 snapshot.
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
new file mode 100644
index 0000000..b63bca4
--- /dev/null
+++ b/tools/perf/builtin-kmem.c
@@ -0,0 +1,2019 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "builtin.h"
+#include "perf.h"
+
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/util.h"
+#include "util/config.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/header.h"
+#include "util/session.h"
+#include "util/tool.h"
+#include "util/callchain.h"
+#include "util/time-utils.h"
+
+#include <subcmd/parse-options.h>
+#include "util/trace-event.h"
+#include "util/data.h"
+#include "util/cpumap.h"
+
+#include "util/debug.h"
+
+#include <linux/kernel.h>
+#include <linux/rbtree.h>
+#include <linux/string.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <locale.h>
+#include <regex.h>
+
+#include "sane_ctype.h"
+
+static int kmem_slab;
+static int kmem_page;
+
+static long kmem_page_size;
+static enum {
+ KMEM_SLAB,
+ KMEM_PAGE,
+} kmem_default = KMEM_SLAB; /* for backward compatibility */
+
+struct alloc_stat;
+typedef int (*sort_fn_t)(void *, void *);
+
+static int alloc_flag;
+static int caller_flag;
+
+static int alloc_lines = -1;
+static int caller_lines = -1;
+
+static bool raw_ip;
+
+struct alloc_stat {
+ u64 call_site;
+ u64 ptr;
+ u64 bytes_req;
+ u64 bytes_alloc;
+ u64 last_alloc;
+ u32 hit;
+ u32 pingpong;
+
+ short alloc_cpu;
+
+ struct rb_node node;
+};
+
+static struct rb_root root_alloc_stat;
+static struct rb_root root_alloc_sorted;
+static struct rb_root root_caller_stat;
+static struct rb_root root_caller_sorted;
+
+static unsigned long total_requested, total_allocated, total_freed;
+static unsigned long nr_allocs, nr_cross_allocs;
+
+/* filters for controlling start and stop of time of analysis */
+static struct perf_time_interval ptime;
+const char *time_str;
+
+static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
+ int bytes_req, int bytes_alloc, int cpu)
+{
+ struct rb_node **node = &root_alloc_stat.rb_node;
+ struct rb_node *parent = NULL;
+ struct alloc_stat *data = NULL;
+
+ while (*node) {
+ parent = *node;
+ data = rb_entry(*node, struct alloc_stat, node);
+
+ if (ptr > data->ptr)
+ node = &(*node)->rb_right;
+ else if (ptr < data->ptr)
+ node = &(*node)->rb_left;
+ else
+ break;
+ }
+
+ if (data && data->ptr == ptr) {
+ data->hit++;
+ data->bytes_req += bytes_req;
+ data->bytes_alloc += bytes_alloc;
+ } else {
+ data = malloc(sizeof(*data));
+ if (!data) {
+ pr_err("%s: malloc failed\n", __func__);
+ return -1;
+ }
+ data->ptr = ptr;
+ data->pingpong = 0;
+ data->hit = 1;
+ data->bytes_req = bytes_req;
+ data->bytes_alloc = bytes_alloc;
+
+ rb_link_node(&data->node, parent, node);
+ rb_insert_color(&data->node, &root_alloc_stat);
+ }
+ data->call_site = call_site;
+ data->alloc_cpu = cpu;
+ data->last_alloc = bytes_alloc;
+
+ return 0;
+}
+
+static int insert_caller_stat(unsigned long call_site,
+ int bytes_req, int bytes_alloc)
+{
+ struct rb_node **node = &root_caller_stat.rb_node;
+ struct rb_node *parent = NULL;
+ struct alloc_stat *data = NULL;
+
+ while (*node) {
+ parent = *node;
+ data = rb_entry(*node, struct alloc_stat, node);
+
+ if (call_site > data->call_site)
+ node = &(*node)->rb_right;
+ else if (call_site < data->call_site)
+ node = &(*node)->rb_left;
+ else
+ break;
+ }
+
+ if (data && data->call_site == call_site) {
+ data->hit++;
+ data->bytes_req += bytes_req;
+ data->bytes_alloc += bytes_alloc;
+ } else {
+ data = malloc(sizeof(*data));
+ if (!data) {
+ pr_err("%s: malloc failed\n", __func__);
+ return -1;
+ }
+ data->call_site = call_site;
+ data->pingpong = 0;
+ data->hit = 1;
+ data->bytes_req = bytes_req;
+ data->bytes_alloc = bytes_alloc;
+
+ rb_link_node(&data->node, parent, node);
+ rb_insert_color(&data->node, &root_caller_stat);
+ }
+
+ return 0;
+}
+
+static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
+ call_site = perf_evsel__intval(evsel, sample, "call_site");
+ int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
+ bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
+
+ if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
+ insert_caller_stat(call_site, bytes_req, bytes_alloc))
+ return -1;
+
+ total_requested += bytes_req;
+ total_allocated += bytes_alloc;
+
+ nr_allocs++;
+ return 0;
+}
+
+static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ int ret = perf_evsel__process_alloc_event(evsel, sample);
+
+ if (!ret) {
+ int node1 = cpu__get_node(sample->cpu),
+ node2 = perf_evsel__intval(evsel, sample, "node");
+
+ if (node1 != node2)
+ nr_cross_allocs++;
+ }
+
+ return ret;
+}
+
+static int ptr_cmp(void *, void *);
+static int slab_callsite_cmp(void *, void *);
+
+static struct alloc_stat *search_alloc_stat(unsigned long ptr,
+ unsigned long call_site,
+ struct rb_root *root,
+ sort_fn_t sort_fn)
+{
+ struct rb_node *node = root->rb_node;
+ struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
+
+ while (node) {
+ struct alloc_stat *data;
+ int cmp;
+
+ data = rb_entry(node, struct alloc_stat, node);
+
+ cmp = sort_fn(&key, data);
+ if (cmp < 0)
+ node = node->rb_left;
+ else if (cmp > 0)
+ node = node->rb_right;
+ else
+ return data;
+ }
+ return NULL;
+}
+
+static int perf_evsel__process_free_event(struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
+ struct alloc_stat *s_alloc, *s_caller;
+
+ s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
+ if (!s_alloc)
+ return 0;
+
+ total_freed += s_alloc->last_alloc;
+
+ if ((short)sample->cpu != s_alloc->alloc_cpu) {
+ s_alloc->pingpong++;
+
+ s_caller = search_alloc_stat(0, s_alloc->call_site,
+ &root_caller_stat,
+ slab_callsite_cmp);
+ if (!s_caller)
+ return -1;
+ s_caller->pingpong++;
+ }
+ s_alloc->alloc_cpu = -1;
+
+ return 0;
+}
+
+static u64 total_page_alloc_bytes;
+static u64 total_page_free_bytes;
+static u64 total_page_nomatch_bytes;
+static u64 total_page_fail_bytes;
+static unsigned long nr_page_allocs;
+static unsigned long nr_page_frees;
+static unsigned long nr_page_fails;
+static unsigned long nr_page_nomatch;
+
+static bool use_pfn;
+static bool live_page;
+static struct perf_session *kmem_session;
+
+#define MAX_MIGRATE_TYPES 6
+#define MAX_PAGE_ORDER 11
+
+static int order_stats[MAX_PAGE_ORDER][MAX_MIGRATE_TYPES];
+
+struct page_stat {
+ struct rb_node node;
+ u64 page;
+ u64 callsite;
+ int order;
+ unsigned gfp_flags;
+ unsigned migrate_type;
+ u64 alloc_bytes;
+ u64 free_bytes;
+ int nr_alloc;
+ int nr_free;
+};
+
+static struct rb_root page_live_tree;
+static struct rb_root page_alloc_tree;
+static struct rb_root page_alloc_sorted;
+static struct rb_root page_caller_tree;
+static struct rb_root page_caller_sorted;
+
+struct alloc_func {
+ u64 start;
+ u64 end;
+ char *name;
+};
+
+static int nr_alloc_funcs;
+static struct alloc_func *alloc_func_list;
+
+static int funcmp(const void *a, const void *b)
+{
+ const struct alloc_func *fa = a;
+ const struct alloc_func *fb = b;
+
+ if (fa->start > fb->start)
+ return 1;
+ else
+ return -1;
+}
+
+static int callcmp(const void *a, const void *b)
+{
+ const struct alloc_func *fa = a;
+ const struct alloc_func *fb = b;
+
+ if (fb->start <= fa->start && fa->end < fb->end)
+ return 0;
+
+ if (fa->start > fb->start)
+ return 1;
+ else
+ return -1;
+}
+
+static int build_alloc_func_list(void)
+{
+ int ret;
+ struct map *kernel_map;
+ struct symbol *sym;
+ struct rb_node *node;
+ struct alloc_func *func;
+ struct machine *machine = &kmem_session->machines.host;
+ regex_t alloc_func_regex;
+ const char pattern[] = "^_?_?(alloc|get_free|get_zeroed)_pages?";
+
+ ret = regcomp(&alloc_func_regex, pattern, REG_EXTENDED);
+ if (ret) {
+ char err[BUFSIZ];
+
+ regerror(ret, &alloc_func_regex, err, sizeof(err));
+ pr_err("Invalid regex: %s\n%s", pattern, err);
+ return -EINVAL;
+ }
+
+ kernel_map = machine__kernel_map(machine);
+ if (map__load(kernel_map) < 0) {
+ pr_err("cannot load kernel map\n");
+ return -ENOENT;
+ }
+
+ map__for_each_symbol(kernel_map, sym, node) {
+ if (regexec(&alloc_func_regex, sym->name, 0, NULL, 0))
+ continue;
+
+ func = realloc(alloc_func_list,
+ (nr_alloc_funcs + 1) * sizeof(*func));
+ if (func == NULL)
+ return -ENOMEM;
+
+ pr_debug("alloc func: %s\n", sym->name);
+ func[nr_alloc_funcs].start = sym->start;
+ func[nr_alloc_funcs].end = sym->end;
+ func[nr_alloc_funcs].name = sym->name;
+
+ alloc_func_list = func;
+ nr_alloc_funcs++;
+ }
+
+ qsort(alloc_func_list, nr_alloc_funcs, sizeof(*func), funcmp);
+
+ regfree(&alloc_func_regex);
+ return 0;
+}
+
+/*
+ * Find first non-memory allocation function from callchain.
+ * The allocation functions are in the 'alloc_func_list'.
+ */
+static u64 find_callsite(struct perf_evsel *evsel, struct perf_sample *sample)
+{
+ struct addr_location al;
+ struct machine *machine = &kmem_session->machines.host;
+ struct callchain_cursor_node *node;
+
+ if (alloc_func_list == NULL) {
+ if (build_alloc_func_list() < 0)
+ goto out;
+ }
+
+ al.thread = machine__findnew_thread(machine, sample->pid, sample->tid);
+ sample__resolve_callchain(sample, &callchain_cursor, NULL, evsel, &al, 16);
+
+ callchain_cursor_commit(&callchain_cursor);
+ while (true) {
+ struct alloc_func key, *caller;
+ u64 addr;
+
+ node = callchain_cursor_current(&callchain_cursor);
+ if (node == NULL)
+ break;
+
+ key.start = key.end = node->ip;
+ caller = bsearch(&key, alloc_func_list, nr_alloc_funcs,
+ sizeof(key), callcmp);
+ if (!caller) {
+ /* found */
+ if (node->map)
+ addr = map__unmap_ip(node->map, node->ip);
+ else
+ addr = node->ip;
+
+ return addr;
+ } else
+ pr_debug3("skipping alloc function: %s\n", caller->name);
+
+ callchain_cursor_advance(&callchain_cursor);
+ }
+
+out:
+ pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip);
+ return sample->ip;
+}
+
+struct sort_dimension {
+ const char name[20];
+ sort_fn_t cmp;
+ struct list_head list;
+};
+
+static LIST_HEAD(page_alloc_sort_input);
+static LIST_HEAD(page_caller_sort_input);
+
+static struct page_stat *
+__page_stat__findnew_page(struct page_stat *pstat, bool create)
+{
+ struct rb_node **node = &page_live_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct page_stat *data;
+
+ while (*node) {
+ s64 cmp;
+
+ parent = *node;
+ data = rb_entry(*node, struct page_stat, node);
+
+ cmp = data->page - pstat->page;
+ if (cmp < 0)
+ node = &parent->rb_left;
+ else if (cmp > 0)
+ node = &parent->rb_right;
+ else
+ return data;
+ }
+
+ if (!create)
+ return NULL;
+
+ data = zalloc(sizeof(*data));
+ if (data != NULL) {
+ data->page = pstat->page;
+ data->order = pstat->order;
+ data->gfp_flags = pstat->gfp_flags;
+ data->migrate_type = pstat->migrate_type;
+
+ rb_link_node(&data->node, parent, node);
+ rb_insert_color(&data->node, &page_live_tree);
+ }
+
+ return data;
+}
+
+static struct page_stat *page_stat__find_page(struct page_stat *pstat)
+{
+ return __page_stat__findnew_page(pstat, false);
+}
+
+static struct page_stat *page_stat__findnew_page(struct page_stat *pstat)
+{
+ return __page_stat__findnew_page(pstat, true);
+}
+
+static struct page_stat *
+__page_stat__findnew_alloc(struct page_stat *pstat, bool create)
+{
+ struct rb_node **node = &page_alloc_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct page_stat *data;
+ struct sort_dimension *sort;
+
+ while (*node) {
+ int cmp = 0;
+
+ parent = *node;
+ data = rb_entry(*node, struct page_stat, node);
+
+ list_for_each_entry(sort, &page_alloc_sort_input, list) {
+ cmp = sort->cmp(pstat, data);
+ if (cmp)
+ break;
+ }
+
+ if (cmp < 0)
+ node = &parent->rb_left;
+ else if (cmp > 0)
+ node = &parent->rb_right;
+ else
+ return data;
+ }
+
+ if (!create)
+ return NULL;
+
+ data = zalloc(sizeof(*data));
+ if (data != NULL) {
+ data->page = pstat->page;
+ data->order = pstat->order;
+ data->gfp_flags = pstat->gfp_flags;
+ data->migrate_type = pstat->migrate_type;
+
+ rb_link_node(&data->node, parent, node);
+ rb_insert_color(&data->node, &page_alloc_tree);
+ }
+
+ return data;
+}
+
+static struct page_stat *page_stat__find_alloc(struct page_stat *pstat)
+{
+ return __page_stat__findnew_alloc(pstat, false);
+}
+
+static struct page_stat *page_stat__findnew_alloc(struct page_stat *pstat)
+{
+ return __page_stat__findnew_alloc(pstat, true);
+}
+
+static struct page_stat *
+__page_stat__findnew_caller(struct page_stat *pstat, bool create)
+{
+ struct rb_node **node = &page_caller_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct page_stat *data;
+ struct sort_dimension *sort;
+
+ while (*node) {
+ int cmp = 0;
+
+ parent = *node;
+ data = rb_entry(*node, struct page_stat, node);
+
+ list_for_each_entry(sort, &page_caller_sort_input, list) {
+ cmp = sort->cmp(pstat, data);
+ if (cmp)
+ break;
+ }
+
+ if (cmp < 0)
+ node = &parent->rb_left;
+ else if (cmp > 0)
+ node = &parent->rb_right;
+ else
+ return data;
+ }
+
+ if (!create)
+ return NULL;
+
+ data = zalloc(sizeof(*data));
+ if (data != NULL) {
+ data->callsite = pstat->callsite;
+ data->order = pstat->order;
+ data->gfp_flags = pstat->gfp_flags;
+ data->migrate_type = pstat->migrate_type;
+
+ rb_link_node(&data->node, parent, node);
+ rb_insert_color(&data->node, &page_caller_tree);
+ }
+
+ return data;
+}
+
+static struct page_stat *page_stat__find_caller(struct page_stat *pstat)
+{
+ return __page_stat__findnew_caller(pstat, false);
+}
+
+static struct page_stat *page_stat__findnew_caller(struct page_stat *pstat)
+{
+ return __page_stat__findnew_caller(pstat, true);
+}
+
+static bool valid_page(u64 pfn_or_page)
+{
+ if (use_pfn && pfn_or_page == -1UL)
+ return false;
+ if (!use_pfn && pfn_or_page == 0)
+ return false;
+ return true;
+}
+
+struct gfp_flag {
+ unsigned int flags;
+ char *compact_str;
+ char *human_readable;
+};
+
+static struct gfp_flag *gfps;
+static int nr_gfps;
+
+static int gfpcmp(const void *a, const void *b)
+{
+ const struct gfp_flag *fa = a;
+ const struct gfp_flag *fb = b;
+
+ return fa->flags - fb->flags;
+}
+
+/* see include/trace/events/mmflags.h */
+static const struct {
+ const char *original;
+ const char *compact;
+} gfp_compact_table[] = {
+ { "GFP_TRANSHUGE", "THP" },
+ { "GFP_TRANSHUGE_LIGHT", "THL" },
+ { "GFP_HIGHUSER_MOVABLE", "HUM" },
+ { "GFP_HIGHUSER", "HU" },
+ { "GFP_USER", "U" },
+ { "GFP_KERNEL_ACCOUNT", "KAC" },
+ { "GFP_KERNEL", "K" },
+ { "GFP_NOFS", "NF" },
+ { "GFP_ATOMIC", "A" },
+ { "GFP_NOIO", "NI" },
+ { "GFP_NOWAIT", "NW" },
+ { "GFP_DMA", "D" },
+ { "__GFP_HIGHMEM", "HM" },
+ { "GFP_DMA32", "D32" },
+ { "__GFP_HIGH", "H" },
+ { "__GFP_ATOMIC", "_A" },
+ { "__GFP_IO", "I" },
+ { "__GFP_FS", "F" },
+ { "__GFP_NOWARN", "NWR" },
+ { "__GFP_RETRY_MAYFAIL", "R" },
+ { "__GFP_NOFAIL", "NF" },
+ { "__GFP_NORETRY", "NR" },
+ { "__GFP_COMP", "C" },
+ { "__GFP_ZERO", "Z" },
+ { "__GFP_NOMEMALLOC", "NMA" },
+ { "__GFP_MEMALLOC", "MA" },
+ { "__GFP_HARDWALL", "HW" },
+ { "__GFP_THISNODE", "TN" },
+ { "__GFP_RECLAIMABLE", "RC" },
+ { "__GFP_MOVABLE", "M" },
+ { "__GFP_ACCOUNT", "AC" },
+ { "__GFP_WRITE", "WR" },
+ { "__GFP_RECLAIM", "R" },
+ { "__GFP_DIRECT_RECLAIM", "DR" },
+ { "__GFP_KSWAPD_RECLAIM", "KR" },
+};
+
+static size_t max_gfp_len;
+
+static char *compact_gfp_flags(char *gfp_flags)
+{
+ char *orig_flags = strdup(gfp_flags);
+ char *new_flags = NULL;
+ char *str, *pos = NULL;
+ size_t len = 0;
+
+ if (orig_flags == NULL)
+ return NULL;
+
+ str = strtok_r(orig_flags, "|", &pos);
+ while (str) {
+ size_t i;
+ char *new;
+ const char *cpt;
+
+ for (i = 0; i < ARRAY_SIZE(gfp_compact_table); i++) {
+ if (strcmp(gfp_compact_table[i].original, str))
+ continue;
+
+ cpt = gfp_compact_table[i].compact;
+ new = realloc(new_flags, len + strlen(cpt) + 2);
+ if (new == NULL) {
+ free(new_flags);
+ return NULL;
+ }
+
+ new_flags = new;
+
+ if (!len) {
+ strcpy(new_flags, cpt);
+ } else {
+ strcat(new_flags, "|");
+ strcat(new_flags, cpt);
+ len++;
+ }
+
+ len += strlen(cpt);
+ }
+
+ str = strtok_r(NULL, "|", &pos);
+ }
+
+ if (max_gfp_len < len)
+ max_gfp_len = len;
+
+ free(orig_flags);
+ return new_flags;
+}
+
+static char *compact_gfp_string(unsigned long gfp_flags)
+{
+ struct gfp_flag key = {
+ .flags = gfp_flags,
+ };
+ struct gfp_flag *gfp;
+
+ gfp = bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp);
+ if (gfp)
+ return gfp->compact_str;
+
+ return NULL;
+}
+
+static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
+ unsigned int gfp_flags)
+{
+ struct tep_record record = {
+ .cpu = sample->cpu,
+ .data = sample->raw_data,
+ .size = sample->raw_size,
+ };
+ struct trace_seq seq;
+ char *str, *pos = NULL;
+
+ if (nr_gfps) {
+ struct gfp_flag key = {
+ .flags = gfp_flags,
+ };
+
+ if (bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp))
+ return 0;
+ }
+
+ trace_seq_init(&seq);
+ tep_event_info(&seq, evsel->tp_format, &record);
+
+ str = strtok_r(seq.buffer, " ", &pos);
+ while (str) {
+ if (!strncmp(str, "gfp_flags=", 10)) {
+ struct gfp_flag *new;
+
+ new = realloc(gfps, (nr_gfps + 1) * sizeof(*gfps));
+ if (new == NULL)
+ return -ENOMEM;
+
+ gfps = new;
+ new += nr_gfps++;
+
+ new->flags = gfp_flags;
+ new->human_readable = strdup(str + 10);
+ new->compact_str = compact_gfp_flags(str + 10);
+ if (!new->human_readable || !new->compact_str)
+ return -ENOMEM;
+
+ qsort(gfps, nr_gfps, sizeof(*gfps), gfpcmp);
+ }
+
+ str = strtok_r(NULL, " ", &pos);
+ }
+
+ trace_seq_destroy(&seq);
+ return 0;
+}
+
+static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ u64 page;
+ unsigned int order = perf_evsel__intval(evsel, sample, "order");
+ unsigned int gfp_flags = perf_evsel__intval(evsel, sample, "gfp_flags");
+ unsigned int migrate_type = perf_evsel__intval(evsel, sample,
+ "migratetype");
+ u64 bytes = kmem_page_size << order;
+ u64 callsite;
+ struct page_stat *pstat;
+ struct page_stat this = {
+ .order = order,
+ .gfp_flags = gfp_flags,
+ .migrate_type = migrate_type,
+ };
+
+ if (use_pfn)
+ page = perf_evsel__intval(evsel, sample, "pfn");
+ else
+ page = perf_evsel__intval(evsel, sample, "page");
+
+ nr_page_allocs++;
+ total_page_alloc_bytes += bytes;
+
+ if (!valid_page(page)) {
+ nr_page_fails++;
+ total_page_fail_bytes += bytes;
+
+ return 0;
+ }
+
+ if (parse_gfp_flags(evsel, sample, gfp_flags) < 0)
+ return -1;
+
+ callsite = find_callsite(evsel, sample);
+
+ /*
+ * This is to find the current page (with correct gfp flags and
+ * migrate type) at free event.
+ */
+ this.page = page;
+ pstat = page_stat__findnew_page(&this);
+ if (pstat == NULL)
+ return -ENOMEM;
+
+ pstat->nr_alloc++;
+ pstat->alloc_bytes += bytes;
+ pstat->callsite = callsite;
+
+ if (!live_page) {
+ pstat = page_stat__findnew_alloc(&this);
+ if (pstat == NULL)
+ return -ENOMEM;
+
+ pstat->nr_alloc++;
+ pstat->alloc_bytes += bytes;
+ pstat->callsite = callsite;
+ }
+
+ this.callsite = callsite;
+ pstat = page_stat__findnew_caller(&this);
+ if (pstat == NULL)
+ return -ENOMEM;
+
+ pstat->nr_alloc++;
+ pstat->alloc_bytes += bytes;
+
+ order_stats[order][migrate_type]++;
+
+ return 0;
+}
+
+static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ u64 page;
+ unsigned int order = perf_evsel__intval(evsel, sample, "order");
+ u64 bytes = kmem_page_size << order;
+ struct page_stat *pstat;
+ struct page_stat this = {
+ .order = order,
+ };
+
+ if (use_pfn)
+ page = perf_evsel__intval(evsel, sample, "pfn");
+ else
+ page = perf_evsel__intval(evsel, sample, "page");
+
+ nr_page_frees++;
+ total_page_free_bytes += bytes;
+
+ this.page = page;
+ pstat = page_stat__find_page(&this);
+ if (pstat == NULL) {
+ pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
+ page, order);
+
+ nr_page_nomatch++;
+ total_page_nomatch_bytes += bytes;
+
+ return 0;
+ }
+
+ this.gfp_flags = pstat->gfp_flags;
+ this.migrate_type = pstat->migrate_type;
+ this.callsite = pstat->callsite;
+
+ rb_erase(&pstat->node, &page_live_tree);
+ free(pstat);
+
+ if (live_page) {
+ order_stats[this.order][this.migrate_type]--;
+ } else {
+ pstat = page_stat__find_alloc(&this);
+ if (pstat == NULL)
+ return -ENOMEM;
+
+ pstat->nr_free++;
+ pstat->free_bytes += bytes;
+ }
+
+ pstat = page_stat__find_caller(&this);
+ if (pstat == NULL)
+ return -ENOENT;
+
+ pstat->nr_free++;
+ pstat->free_bytes += bytes;
+
+ if (live_page) {
+ pstat->nr_alloc--;
+ pstat->alloc_bytes -= bytes;
+
+ if (pstat->nr_alloc == 0) {
+ rb_erase(&pstat->node, &page_caller_tree);
+ free(pstat);
+ }
+ }
+
+ return 0;
+}
+
+static bool perf_kmem__skip_sample(struct perf_sample *sample)
+{
+ /* skip sample based on time? */
+ if (perf_time__skip_sample(&ptime, sample->time))
+ return true;
+
+ return false;
+}
+
+typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
+ struct perf_sample *sample);
+
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ int err = 0;
+ struct thread *thread = machine__findnew_thread(machine, sample->pid,
+ sample->tid);
+
+ if (thread == NULL) {
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ if (perf_kmem__skip_sample(sample))
+ return 0;
+
+ dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
+
+ if (evsel->handler != NULL) {
+ tracepoint_handler f = evsel->handler;
+ err = f(evsel, sample);
+ }
+
+ thread__put(thread);
+
+ return err;
+}
+
+static struct perf_tool perf_kmem = {
+ .sample = process_sample_event,
+ .comm = perf_event__process_comm,
+ .mmap = perf_event__process_mmap,
+ .mmap2 = perf_event__process_mmap2,
+ .namespaces = perf_event__process_namespaces,
+ .ordered_events = true,
+};
+
+static double fragmentation(unsigned long n_req, unsigned long n_alloc)
+{
+ if (n_alloc == 0)
+ return 0.0;
+ else
+ return 100.0 - (100.0 * n_req / n_alloc);
+}
+
+static void __print_slab_result(struct rb_root *root,
+ struct perf_session *session,
+ int n_lines, int is_caller)
+{
+ struct rb_node *next;
+ struct machine *machine = &session->machines.host;
+
+ printf("%.105s\n", graph_dotted_line);
+ printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
+ printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
+ printf("%.105s\n", graph_dotted_line);
+
+ next = rb_first(root);
+
+ while (next && n_lines--) {
+ struct alloc_stat *data = rb_entry(next, struct alloc_stat,
+ node);
+ struct symbol *sym = NULL;
+ struct map *map;
+ char buf[BUFSIZ];
+ u64 addr;
+
+ if (is_caller) {
+ addr = data->call_site;
+ if (!raw_ip)
+ sym = machine__find_kernel_symbol(machine, addr, &map);
+ } else
+ addr = data->ptr;
+
+ if (sym != NULL)
+ snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
+ addr - map->unmap_ip(map, sym->start));
+ else
+ snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
+ printf(" %-34s |", buf);
+
+ printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %9lu | %6.3f%%\n",
+ (unsigned long long)data->bytes_alloc,
+ (unsigned long)data->bytes_alloc / data->hit,
+ (unsigned long long)data->bytes_req,
+ (unsigned long)data->bytes_req / data->hit,
+ (unsigned long)data->hit,
+ (unsigned long)data->pingpong,
+ fragmentation(data->bytes_req, data->bytes_alloc));
+
+ next = rb_next(next);
+ }
+
+ if (n_lines == -1)
+ printf(" ... | ... | ... | ... | ... | ... \n");
+
+ printf("%.105s\n", graph_dotted_line);
+}
+
+static const char * const migrate_type_str[] = {
+ "UNMOVABL",
+ "RECLAIM",
+ "MOVABLE",
+ "RESERVED",
+ "CMA/ISLT",
+ "UNKNOWN",
+};
+
+static void __print_page_alloc_result(struct perf_session *session, int n_lines)
+{
+ struct rb_node *next = rb_first(&page_alloc_sorted);
+ struct machine *machine = &session->machines.host;
+ const char *format;
+ int gfp_len = max(strlen("GFP flags"), max_gfp_len);
+
+ printf("\n%.105s\n", graph_dotted_line);
+ printf(" %-16s | %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
+ use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total",
+ gfp_len, "GFP flags");
+ printf("%.105s\n", graph_dotted_line);
+
+ if (use_pfn)
+ format = " %16llu | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
+ else
+ format = " %016llx | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
+
+ while (next && n_lines--) {
+ struct page_stat *data;
+ struct symbol *sym;
+ struct map *map;
+ char buf[32];
+ char *caller = buf;
+
+ data = rb_entry(next, struct page_stat, node);
+ sym = machine__find_kernel_symbol(machine, data->callsite, &map);
+ if (sym)
+ caller = sym->name;
+ else
+ scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
+
+ printf(format, (unsigned long long)data->page,
+ (unsigned long long)data->alloc_bytes / 1024,
+ data->nr_alloc, data->order,
+ migrate_type_str[data->migrate_type],
+ gfp_len, compact_gfp_string(data->gfp_flags), caller);
+
+ next = rb_next(next);
+ }
+
+ if (n_lines == -1) {
+ printf(" ... | ... | ... | ... | ... | %-*s | ...\n",
+ gfp_len, "...");
+ }
+
+ printf("%.105s\n", graph_dotted_line);
+}
+
+static void __print_page_caller_result(struct perf_session *session, int n_lines)
+{
+ struct rb_node *next = rb_first(&page_caller_sorted);
+ struct machine *machine = &session->machines.host;
+ int gfp_len = max(strlen("GFP flags"), max_gfp_len);
+
+ printf("\n%.105s\n", graph_dotted_line);
+ printf(" %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
+ live_page ? "Live" : "Total", gfp_len, "GFP flags");
+ printf("%.105s\n", graph_dotted_line);
+
+ while (next && n_lines--) {
+ struct page_stat *data;
+ struct symbol *sym;
+ struct map *map;
+ char buf[32];
+ char *caller = buf;
+
+ data = rb_entry(next, struct page_stat, node);
+ sym = machine__find_kernel_symbol(machine, data->callsite, &map);
+ if (sym)
+ caller = sym->name;
+ else
+ scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
+
+ printf(" %'16llu | %'9d | %5d | %8s | %-*s | %s\n",
+ (unsigned long long)data->alloc_bytes / 1024,
+ data->nr_alloc, data->order,
+ migrate_type_str[data->migrate_type],
+ gfp_len, compact_gfp_string(data->gfp_flags), caller);
+
+ next = rb_next(next);
+ }
+
+ if (n_lines == -1) {
+ printf(" ... | ... | ... | ... | %-*s | ...\n",
+ gfp_len, "...");
+ }
+
+ printf("%.105s\n", graph_dotted_line);
+}
+
+static void print_gfp_flags(void)
+{
+ int i;
+
+ printf("#\n");
+ printf("# GFP flags\n");
+ printf("# ---------\n");
+ for (i = 0; i < nr_gfps; i++) {
+ printf("# %08x: %*s: %s\n", gfps[i].flags,
+ (int) max_gfp_len, gfps[i].compact_str,
+ gfps[i].human_readable);
+ }
+}
+
+static void print_slab_summary(void)
+{
+ printf("\nSUMMARY (SLAB allocator)");
+ printf("\n========================\n");
+ printf("Total bytes requested: %'lu\n", total_requested);
+ printf("Total bytes allocated: %'lu\n", total_allocated);
+ printf("Total bytes freed: %'lu\n", total_freed);
+ if (total_allocated > total_freed) {
+ printf("Net total bytes allocated: %'lu\n",
+ total_allocated - total_freed);
+ }
+ printf("Total bytes wasted on internal fragmentation: %'lu\n",
+ total_allocated - total_requested);
+ printf("Internal fragmentation: %f%%\n",
+ fragmentation(total_requested, total_allocated));
+ printf("Cross CPU allocations: %'lu/%'lu\n", nr_cross_allocs, nr_allocs);
+}
+
+static void print_page_summary(void)
+{
+ int o, m;
+ u64 nr_alloc_freed = nr_page_frees - nr_page_nomatch;
+ u64 total_alloc_freed_bytes = total_page_free_bytes - total_page_nomatch_bytes;
+
+ printf("\nSUMMARY (page allocator)");
+ printf("\n========================\n");
+ printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation requests",
+ nr_page_allocs, total_page_alloc_bytes / 1024);
+ printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free requests",
+ nr_page_frees, total_page_free_bytes / 1024);
+ printf("\n");
+
+ printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc+freed requests",
+ nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
+ printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc-only requests",
+ nr_page_allocs - nr_alloc_freed,
+ (total_page_alloc_bytes - total_alloc_freed_bytes) / 1024);
+ printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free-only requests",
+ nr_page_nomatch, total_page_nomatch_bytes / 1024);
+ printf("\n");
+
+ printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation failures",
+ nr_page_fails, total_page_fail_bytes / 1024);
+ printf("\n");
+
+ printf("%5s %12s %12s %12s %12s %12s\n", "Order", "Unmovable",
+ "Reclaimable", "Movable", "Reserved", "CMA/Isolated");
+ printf("%.5s %.12s %.12s %.12s %.12s %.12s\n", graph_dotted_line,
+ graph_dotted_line, graph_dotted_line, graph_dotted_line,
+ graph_dotted_line, graph_dotted_line);
+
+ for (o = 0; o < MAX_PAGE_ORDER; o++) {
+ printf("%5d", o);
+ for (m = 0; m < MAX_MIGRATE_TYPES - 1; m++) {
+ if (order_stats[o][m])
+ printf(" %'12d", order_stats[o][m]);
+ else
+ printf(" %12c", '.');
+ }
+ printf("\n");
+ }
+}
+
+static void print_slab_result(struct perf_session *session)
+{
+ if (caller_flag)
+ __print_slab_result(&root_caller_sorted, session, caller_lines, 1);
+ if (alloc_flag)
+ __print_slab_result(&root_alloc_sorted, session, alloc_lines, 0);
+ print_slab_summary();
+}
+
+static void print_page_result(struct perf_session *session)
+{
+ if (caller_flag || alloc_flag)
+ print_gfp_flags();
+ if (caller_flag)
+ __print_page_caller_result(session, caller_lines);
+ if (alloc_flag)
+ __print_page_alloc_result(session, alloc_lines);
+ print_page_summary();
+}
+
+static void print_result(struct perf_session *session)
+{
+ if (kmem_slab)
+ print_slab_result(session);
+ if (kmem_page)
+ print_page_result(session);
+}
+
+static LIST_HEAD(slab_caller_sort);
+static LIST_HEAD(slab_alloc_sort);
+static LIST_HEAD(page_caller_sort);
+static LIST_HEAD(page_alloc_sort);
+
+static void sort_slab_insert(struct rb_root *root, struct alloc_stat *data,
+ struct list_head *sort_list)
+{
+ struct rb_node **new = &(root->rb_node);
+ struct rb_node *parent = NULL;
+ struct sort_dimension *sort;
+
+ while (*new) {
+ struct alloc_stat *this;
+ int cmp = 0;
+
+ this = rb_entry(*new, struct alloc_stat, node);
+ parent = *new;
+
+ list_for_each_entry(sort, sort_list, list) {
+ cmp = sort->cmp(data, this);
+ if (cmp)
+ break;
+ }
+
+ if (cmp > 0)
+ new = &((*new)->rb_left);
+ else
+ new = &((*new)->rb_right);
+ }
+
+ rb_link_node(&data->node, parent, new);
+ rb_insert_color(&data->node, root);
+}
+
+static void __sort_slab_result(struct rb_root *root, struct rb_root *root_sorted,
+ struct list_head *sort_list)
+{
+ struct rb_node *node;
+ struct alloc_stat *data;
+
+ for (;;) {
+ node = rb_first(root);
+ if (!node)
+ break;
+
+ rb_erase(node, root);
+ data = rb_entry(node, struct alloc_stat, node);
+ sort_slab_insert(root_sorted, data, sort_list);
+ }
+}
+
+static void sort_page_insert(struct rb_root *root, struct page_stat *data,
+ struct list_head *sort_list)
+{
+ struct rb_node **new = &root->rb_node;
+ struct rb_node *parent = NULL;
+ struct sort_dimension *sort;
+
+ while (*new) {
+ struct page_stat *this;
+ int cmp = 0;
+
+ this = rb_entry(*new, struct page_stat, node);
+ parent = *new;
+
+ list_for_each_entry(sort, sort_list, list) {
+ cmp = sort->cmp(data, this);
+ if (cmp)
+ break;
+ }
+
+ if (cmp > 0)
+ new = &parent->rb_left;
+ else
+ new = &parent->rb_right;
+ }
+
+ rb_link_node(&data->node, parent, new);
+ rb_insert_color(&data->node, root);
+}
+
+static void __sort_page_result(struct rb_root *root, struct rb_root *root_sorted,
+ struct list_head *sort_list)
+{
+ struct rb_node *node;
+ struct page_stat *data;
+
+ for (;;) {
+ node = rb_first(root);
+ if (!node)
+ break;
+
+ rb_erase(node, root);
+ data = rb_entry(node, struct page_stat, node);
+ sort_page_insert(root_sorted, data, sort_list);
+ }
+}
+
+static void sort_result(void)
+{
+ if (kmem_slab) {
+ __sort_slab_result(&root_alloc_stat, &root_alloc_sorted,
+ &slab_alloc_sort);
+ __sort_slab_result(&root_caller_stat, &root_caller_sorted,
+ &slab_caller_sort);
+ }
+ if (kmem_page) {
+ if (live_page)
+ __sort_page_result(&page_live_tree, &page_alloc_sorted,
+ &page_alloc_sort);
+ else
+ __sort_page_result(&page_alloc_tree, &page_alloc_sorted,
+ &page_alloc_sort);
+
+ __sort_page_result(&page_caller_tree, &page_caller_sorted,
+ &page_caller_sort);
+ }
+}
+
+static int __cmd_kmem(struct perf_session *session)
+{
+ int err = -EINVAL;
+ struct perf_evsel *evsel;
+ const struct perf_evsel_str_handler kmem_tracepoints[] = {
+ /* slab allocator */
+ { "kmem:kmalloc", perf_evsel__process_alloc_event, },
+ { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event, },
+ { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event, },
+ { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
+ { "kmem:kfree", perf_evsel__process_free_event, },
+ { "kmem:kmem_cache_free", perf_evsel__process_free_event, },
+ /* page allocator */
+ { "kmem:mm_page_alloc", perf_evsel__process_page_alloc_event, },
+ { "kmem:mm_page_free", perf_evsel__process_page_free_event, },
+ };
+
+ if (!perf_session__has_traces(session, "kmem record"))
+ goto out;
+
+ if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
+ pr_err("Initializing perf session tracepoint handlers failed\n");
+ goto out;
+ }
+
+ evlist__for_each_entry(session->evlist, evsel) {
+ if (!strcmp(perf_evsel__name(evsel), "kmem:mm_page_alloc") &&
+ perf_evsel__field(evsel, "pfn")) {
+ use_pfn = true;
+ break;
+ }
+ }
+
+ setup_pager();
+ err = perf_session__process_events(session);
+ if (err != 0) {
+ pr_err("error during process events: %d\n", err);
+ goto out;
+ }
+ sort_result();
+ print_result(session);
+out:
+ return err;
+}
+
+/* slab sort keys */
+static int ptr_cmp(void *a, void *b)
+{
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ if (l->ptr < r->ptr)
+ return -1;
+ else if (l->ptr > r->ptr)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension ptr_sort_dimension = {
+ .name = "ptr",
+ .cmp = ptr_cmp,
+};
+
+static int slab_callsite_cmp(void *a, void *b)
+{
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ if (l->call_site < r->call_site)
+ return -1;
+ else if (l->call_site > r->call_site)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension callsite_sort_dimension = {
+ .name = "callsite",
+ .cmp = slab_callsite_cmp,
+};
+
+static int hit_cmp(void *a, void *b)
+{
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ if (l->hit < r->hit)
+ return -1;
+ else if (l->hit > r->hit)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension hit_sort_dimension = {
+ .name = "hit",
+ .cmp = hit_cmp,
+};
+
+static int bytes_cmp(void *a, void *b)
+{
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ if (l->bytes_alloc < r->bytes_alloc)
+ return -1;
+ else if (l->bytes_alloc > r->bytes_alloc)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension bytes_sort_dimension = {
+ .name = "bytes",
+ .cmp = bytes_cmp,
+};
+
+static int frag_cmp(void *a, void *b)
+{
+ double x, y;
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ x = fragmentation(l->bytes_req, l->bytes_alloc);
+ y = fragmentation(r->bytes_req, r->bytes_alloc);
+
+ if (x < y)
+ return -1;
+ else if (x > y)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension frag_sort_dimension = {
+ .name = "frag",
+ .cmp = frag_cmp,
+};
+
+static int pingpong_cmp(void *a, void *b)
+{
+ struct alloc_stat *l = a;
+ struct alloc_stat *r = b;
+
+ if (l->pingpong < r->pingpong)
+ return -1;
+ else if (l->pingpong > r->pingpong)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension pingpong_sort_dimension = {
+ .name = "pingpong",
+ .cmp = pingpong_cmp,
+};
+
+/* page sort keys */
+static int page_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ if (l->page < r->page)
+ return -1;
+ else if (l->page > r->page)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension page_sort_dimension = {
+ .name = "page",
+ .cmp = page_cmp,
+};
+
+static int page_callsite_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ if (l->callsite < r->callsite)
+ return -1;
+ else if (l->callsite > r->callsite)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension page_callsite_sort_dimension = {
+ .name = "callsite",
+ .cmp = page_callsite_cmp,
+};
+
+static int page_hit_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ if (l->nr_alloc < r->nr_alloc)
+ return -1;
+ else if (l->nr_alloc > r->nr_alloc)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension page_hit_sort_dimension = {
+ .name = "hit",
+ .cmp = page_hit_cmp,
+};
+
+static int page_bytes_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ if (l->alloc_bytes < r->alloc_bytes)
+ return -1;
+ else if (l->alloc_bytes > r->alloc_bytes)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension page_bytes_sort_dimension = {
+ .name = "bytes",
+ .cmp = page_bytes_cmp,
+};
+
+static int page_order_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ if (l->order < r->order)
+ return -1;
+ else if (l->order > r->order)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension page_order_sort_dimension = {
+ .name = "order",
+ .cmp = page_order_cmp,
+};
+
+static int migrate_type_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ /* for internal use to find free'd page */
+ if (l->migrate_type == -1U)
+ return 0;
+
+ if (l->migrate_type < r->migrate_type)
+ return -1;
+ else if (l->migrate_type > r->migrate_type)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension migrate_type_sort_dimension = {
+ .name = "migtype",
+ .cmp = migrate_type_cmp,
+};
+
+static int gfp_flags_cmp(void *a, void *b)
+{
+ struct page_stat *l = a;
+ struct page_stat *r = b;
+
+ /* for internal use to find free'd page */
+ if (l->gfp_flags == -1U)
+ return 0;
+
+ if (l->gfp_flags < r->gfp_flags)
+ return -1;
+ else if (l->gfp_flags > r->gfp_flags)
+ return 1;
+ return 0;
+}
+
+static struct sort_dimension gfp_flags_sort_dimension = {
+ .name = "gfp",
+ .cmp = gfp_flags_cmp,
+};
+
+static struct sort_dimension *slab_sorts[] = {
+ &ptr_sort_dimension,
+ &callsite_sort_dimension,
+ &hit_sort_dimension,
+ &bytes_sort_dimension,
+ &frag_sort_dimension,
+ &pingpong_sort_dimension,
+};
+
+static struct sort_dimension *page_sorts[] = {
+ &page_sort_dimension,
+ &page_callsite_sort_dimension,
+ &page_hit_sort_dimension,
+ &page_bytes_sort_dimension,
+ &page_order_sort_dimension,
+ &migrate_type_sort_dimension,
+ &gfp_flags_sort_dimension,
+};
+
+static int slab_sort_dimension__add(const char *tok, struct list_head *list)
+{
+ struct sort_dimension *sort;
+ int i;
+
+ for (i = 0; i < (int)ARRAY_SIZE(slab_sorts); i++) {
+ if (!strcmp(slab_sorts[i]->name, tok)) {
+ sort = memdup(slab_sorts[i], sizeof(*slab_sorts[i]));
+ if (!sort) {
+ pr_err("%s: memdup failed\n", __func__);
+ return -1;
+ }
+ list_add_tail(&sort->list, list);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static int page_sort_dimension__add(const char *tok, struct list_head *list)
+{
+ struct sort_dimension *sort;
+ int i;
+
+ for (i = 0; i < (int)ARRAY_SIZE(page_sorts); i++) {
+ if (!strcmp(page_sorts[i]->name, tok)) {
+ sort = memdup(page_sorts[i], sizeof(*page_sorts[i]));
+ if (!sort) {
+ pr_err("%s: memdup failed\n", __func__);
+ return -1;
+ }
+ list_add_tail(&sort->list, list);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static int setup_slab_sorting(struct list_head *sort_list, const char *arg)
+{
+ char *tok;
+ char *str = strdup(arg);
+ char *pos = str;
+
+ if (!str) {
+ pr_err("%s: strdup failed\n", __func__);
+ return -1;
+ }
+
+ while (true) {
+ tok = strsep(&pos, ",");
+ if (!tok)
+ break;
+ if (slab_sort_dimension__add(tok, sort_list) < 0) {
+ pr_err("Unknown slab --sort key: '%s'", tok);
+ free(str);
+ return -1;
+ }
+ }
+
+ free(str);
+ return 0;
+}
+
+static int setup_page_sorting(struct list_head *sort_list, const char *arg)
+{
+ char *tok;
+ char *str = strdup(arg);
+ char *pos = str;
+
+ if (!str) {
+ pr_err("%s: strdup failed\n", __func__);
+ return -1;
+ }
+
+ while (true) {
+ tok = strsep(&pos, ",");
+ if (!tok)
+ break;
+ if (page_sort_dimension__add(tok, sort_list) < 0) {
+ pr_err("Unknown page --sort key: '%s'", tok);
+ free(str);
+ return -1;
+ }
+ }
+
+ free(str);
+ return 0;
+}
+
+static int parse_sort_opt(const struct option *opt __maybe_unused,
+ const char *arg, int unset __maybe_unused)
+{
+ if (!arg)
+ return -1;
+
+ if (kmem_page > kmem_slab ||
+ (kmem_page == 0 && kmem_slab == 0 && kmem_default == KMEM_PAGE)) {
+ if (caller_flag > alloc_flag)
+ return setup_page_sorting(&page_caller_sort, arg);
+ else
+ return setup_page_sorting(&page_alloc_sort, arg);
+ } else {
+ if (caller_flag > alloc_flag)
+ return setup_slab_sorting(&slab_caller_sort, arg);
+ else
+ return setup_slab_sorting(&slab_alloc_sort, arg);
+ }
+
+ return 0;
+}
+
+static int parse_caller_opt(const struct option *opt __maybe_unused,
+ const char *arg __maybe_unused,
+ int unset __maybe_unused)
+{
+ caller_flag = (alloc_flag + 1);
+ return 0;
+}
+
+static int parse_alloc_opt(const struct option *opt __maybe_unused,
+ const char *arg __maybe_unused,
+ int unset __maybe_unused)
+{
+ alloc_flag = (caller_flag + 1);
+ return 0;
+}
+
+static int parse_slab_opt(const struct option *opt __maybe_unused,
+ const char *arg __maybe_unused,
+ int unset __maybe_unused)
+{
+ kmem_slab = (kmem_page + 1);
+ return 0;
+}
+
+static int parse_page_opt(const struct option *opt __maybe_unused,
+ const char *arg __maybe_unused,
+ int unset __maybe_unused)
+{
+ kmem_page = (kmem_slab + 1);
+ return 0;
+}
+
+static int parse_line_opt(const struct option *opt __maybe_unused,
+ const char *arg, int unset __maybe_unused)
+{
+ int lines;
+
+ if (!arg)
+ return -1;
+
+ lines = strtoul(arg, NULL, 10);
+
+ if (caller_flag > alloc_flag)
+ caller_lines = lines;
+ else
+ alloc_lines = lines;
+
+ return 0;
+}
+
+static int __cmd_record(int argc, const char **argv)
+{
+ const char * const record_args[] = {
+ "record", "-a", "-R", "-c", "1",
+ };
+ const char * const slab_events[] = {
+ "-e", "kmem:kmalloc",
+ "-e", "kmem:kmalloc_node",
+ "-e", "kmem:kfree",
+ "-e", "kmem:kmem_cache_alloc",
+ "-e", "kmem:kmem_cache_alloc_node",
+ "-e", "kmem:kmem_cache_free",
+ };
+ const char * const page_events[] = {
+ "-e", "kmem:mm_page_alloc",
+ "-e", "kmem:mm_page_free",
+ };
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+ if (kmem_slab)
+ rec_argc += ARRAY_SIZE(slab_events);
+ if (kmem_page)
+ rec_argc += ARRAY_SIZE(page_events) + 1; /* for -g */
+
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ if (kmem_slab) {
+ for (j = 0; j < ARRAY_SIZE(slab_events); j++, i++)
+ rec_argv[i] = strdup(slab_events[j]);
+ }
+ if (kmem_page) {
+ rec_argv[i++] = strdup("-g");
+
+ for (j = 0; j < ARRAY_SIZE(page_events); j++, i++)
+ rec_argv[i] = strdup(page_events[j]);
+ }
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ return cmd_record(i, rec_argv);
+}
+
+static int kmem_config(const char *var, const char *value, void *cb __maybe_unused)
+{
+ if (!strcmp(var, "kmem.default")) {
+ if (!strcmp(value, "slab"))
+ kmem_default = KMEM_SLAB;
+ else if (!strcmp(value, "page"))
+ kmem_default = KMEM_PAGE;
+ else
+ pr_err("invalid default value ('slab' or 'page' required): %s\n",
+ value);
+ return 0;
+ }
+
+ return 0;
+}
+
+int cmd_kmem(int argc, const char **argv)
+{
+ const char * const default_slab_sort = "frag,hit,bytes";
+ const char * const default_page_sort = "bytes,hit";
+ struct perf_data data = {
+ .mode = PERF_DATA_MODE_READ,
+ };
+ const struct option kmem_options[] = {
+ OPT_STRING('i', "input", &input_name, "file", "input file name"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
+ "show per-callsite statistics", parse_caller_opt),
+ OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
+ "show per-allocation statistics", parse_alloc_opt),
+ OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
+ "sort by keys: ptr, callsite, bytes, hit, pingpong, frag, "
+ "page, order, migtype, gfp", parse_sort_opt),
+ OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
+ OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
+ OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
+ OPT_CALLBACK_NOOPT(0, "slab", NULL, NULL, "Analyze slab allocator",
+ parse_slab_opt),
+ OPT_CALLBACK_NOOPT(0, "page", NULL, NULL, "Analyze page allocator",
+ parse_page_opt),
+ OPT_BOOLEAN(0, "live", &live_page, "Show live page stat"),
+ OPT_STRING(0, "time", &time_str, "str",
+ "Time span of interest (start,stop)"),
+ OPT_END()
+ };
+ const char *const kmem_subcommands[] = { "record", "stat", NULL };
+ const char *kmem_usage[] = {
+ NULL,
+ NULL
+ };
+ struct perf_session *session;
+ const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
+ int ret = perf_config(kmem_config, NULL);
+
+ if (ret)
+ return ret;
+
+ argc = parse_options_subcommand(argc, argv, kmem_options,
+ kmem_subcommands, kmem_usage, 0);
+
+ if (!argc)
+ usage_with_options(kmem_usage, kmem_options);
+
+ if (kmem_slab == 0 && kmem_page == 0) {
+ if (kmem_default == KMEM_SLAB)
+ kmem_slab = 1;
+ else
+ kmem_page = 1;
+ }
+
+ if (!strncmp(argv[0], "rec", 3)) {
+ symbol__init(NULL);
+ return __cmd_record(argc, argv);
+ }
+
+ data.file.path = input_name;
+
+ kmem_session = session = perf_session__new(&data, false, &perf_kmem);
+ if (session == NULL)
+ return -1;
+
+ ret = -1;
+
+ if (kmem_slab) {
+ if (!perf_evlist__find_tracepoint_by_name(session->evlist,
+ "kmem:kmalloc")) {
+ pr_err(errmsg, "slab", "slab");
+ goto out_delete;
+ }
+ }
+
+ if (kmem_page) {
+ struct perf_evsel *evsel;
+
+ evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+ "kmem:mm_page_alloc");
+ if (evsel == NULL) {
+ pr_err(errmsg, "page", "page");
+ goto out_delete;
+ }
+
+ kmem_page_size = tep_get_page_size(evsel->tp_format->pevent);
+ symbol_conf.use_callchain = true;
+ }
+
+ symbol__init(&session->header.env);
+
+ if (perf_time__parse_str(&ptime, time_str) != 0) {
+ pr_err("Invalid time string\n");
+ ret = -EINVAL;
+ goto out_delete;
+ }
+
+ if (!strcmp(argv[0], "stat")) {
+ setlocale(LC_ALL, "");
+
+ if (cpu__setup_cpunode_map())
+ goto out_delete;
+
+ if (list_empty(&slab_caller_sort))
+ setup_slab_sorting(&slab_caller_sort, default_slab_sort);
+ if (list_empty(&slab_alloc_sort))
+ setup_slab_sorting(&slab_alloc_sort, default_slab_sort);
+ if (list_empty(&page_caller_sort))
+ setup_page_sorting(&page_caller_sort, default_page_sort);
+ if (list_empty(&page_alloc_sort))
+ setup_page_sorting(&page_alloc_sort, default_page_sort);
+
+ if (kmem_page) {
+ setup_page_sorting(&page_alloc_sort_input,
+ "page,order,migtype,gfp");
+ setup_page_sorting(&page_caller_sort_input,
+ "callsite,order,migtype,gfp");
+ }
+ ret = __cmd_kmem(session);
+ } else
+ usage_with_options(kmem_usage, kmem_options);
+
+out_delete:
+ perf_session__delete(session);
+
+ return ret;
+}
+