| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Namhyung Kim | 5753 | 59.50% | 15 | 11.54% |
| Li Zefan | 2545 | 26.32% | 6 | 4.62% |
| Arnaldo Carvalho de Melo | 595 | 6.15% | 52 | 40.00% |
| David Ahern | 135 | 1.40% | 4 | 3.08% |
| Leo Yan | 113 | 1.17% | 2 | 1.54% |
| Pekka J Enberg | 107 | 1.11% | 2 | 1.54% |
| Ian Rogers | 102 | 1.05% | 9 | 6.92% |
| Vlastimil Babka | 75 | 0.78% | 3 | 2.31% |
| Ingo Molnar | 59 | 0.61% | 3 | 2.31% |
| Jiri Olsa | 25 | 0.26% | 4 | 3.08% |
| Irina Tirdea | 24 | 0.25% | 2 | 1.54% |
| Yunlong Song | 22 | 0.23% | 1 | 0.77% |
| Ramkumar Ramachandra | 18 | 0.19% | 1 | 0.77% |
| Aditya Gupta | 13 | 0.13% | 1 | 0.77% |
| Li Wei | 12 | 0.12% | 1 | 0.77% |
| Tzvetomir Stoyanov | 11 | 0.11% | 2 | 1.54% |
| Don Zickus | 7 | 0.07% | 1 | 0.77% |
| Taeung Song | 7 | 0.07% | 2 | 1.54% |
| Mamatha Inamdar | 7 | 0.07% | 1 | 0.77% |
| Christophe Jaillet | 6 | 0.06% | 1 | 0.77% |
| Yunfeng Ye | 5 | 0.05% | 1 | 0.77% |
| Frédéric Weisbecker | 4 | 0.04% | 2 | 1.54% |
| Yanmin Zhang | 3 | 0.03% | 1 | 0.77% |
| Arjan van de Ven | 3 | 0.03% | 1 | 0.77% |
| Chris Samuel | 3 | 0.03% | 1 | 0.77% |
| Rasmus Villemoes | 2 | 0.02% | 1 | 0.77% |
| Tzvetomir Stoyanov (VMware) | 2 | 0.02% | 2 | 1.54% |
| Wenji Huang | 2 | 0.02% | 1 | 0.77% |
| Ian Munsie | 2 | 0.02% | 1 | 0.77% |
| Wang Nan | 2 | 0.02% | 1 | 0.77% |
| Michal Hocko | 1 | 0.01% | 1 | 0.77% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.77% |
| Yang Jihong | 1 | 0.01% | 1 | 0.77% |
| Robert Richter | 1 | 0.01% | 1 | 0.77% |
| Josh Poimboeuf | 1 | 0.01% | 1 | 0.77% |
| Total | 9669 | 130 |
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// SPDX-License-Identifier: GPL-2.0 #include "builtin.h" #include "util/dso.h" #include "util/evlist.h" #include "util/evsel.h" #include "util/config.h" #include "util/map.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 <linux/err.h> #include <subcmd/pager.h> #include <subcmd/parse-options.h> #include "util/trace-event.h" #include "util/data.h" #include "util/cpumap.h" #include "util/debug.h" #include "util/string2.h" #include "util/util.h" #include <linux/kernel.h> #include <linux/numa.h> #include <linux/rbtree.h> #include <linux/string.h> #include <linux/zalloc.h> #include <errno.h> #include <inttypes.h> #include <locale.h> #include <regex.h> #include <linux/ctype.h> #include <traceevent/event-parse.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 evsel__process_alloc_event(struct evsel *evsel, struct perf_sample *sample) { unsigned long ptr = evsel__intval(evsel, sample, "ptr"), call_site = evsel__intval(evsel, sample, "call_site"); int bytes_req = evsel__intval(evsel, sample, "bytes_req"), bytes_alloc = 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++; /* * Commit 11e9734bcb6a ("mm/slab_common: unify NUMA and UMA * version of tracepoints") adds the field "node" into the * tracepoints 'kmalloc' and 'kmem_cache_alloc'. * * The legacy tracepoints 'kmalloc_node' and 'kmem_cache_alloc_node' * also contain the field "node". * * If the tracepoint contains the field "node" the tool stats the * cross allocation. */ if (evsel__field(evsel, "node")) { int node1, node2; node1 = cpu__get_node((struct perf_cpu){.cpu = sample->cpu}); node2 = evsel__intval(evsel, sample, "node"); /* * If the field "node" is NUMA_NO_NODE (-1), we don't take it * as a cross allocation. */ if ((node2 != NUMA_NO_NODE) && (node1 != node2)) nr_cross_allocs++; } return 0; } 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 evsel__process_free_event(struct evsel *evsel, struct perf_sample *sample) { unsigned long ptr = 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; static 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 evsel *evsel, struct perf_sample *sample) { struct addr_location al; struct machine *machine = &kmem_session->machines.host; struct callchain_cursor_node *node; struct callchain_cursor *cursor; u64 result = sample->ip; addr_location__init(&al); if (alloc_func_list == NULL) { if (build_alloc_func_list() < 0) goto out; } al.thread = machine__findnew_thread(machine, sample->pid, sample->tid); cursor = get_tls_callchain_cursor(); if (cursor == NULL) goto out; sample__resolve_callchain(sample, cursor, NULL, evsel, &al, 16); callchain_cursor_commit(cursor); while (true) { struct alloc_func key, *caller; u64 addr; node = callchain_cursor_current(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->ms.map) addr = map__dso_unmap_ip(node->ms.map, node->ip); else addr = node->ip; result = addr; goto out; } else pr_debug3("skipping alloc function: %s\n", caller->name); callchain_cursor_advance(cursor); } pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip); out: addr_location__exit(&al); return result; } 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_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); free(orig_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 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_print_event(evsel->tp_format->tep, &seq, &record, "%s", TEP_PRINT_INFO); 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 evsel__process_page_alloc_event(struct evsel *evsel, struct perf_sample *sample) { u64 page; unsigned int order = evsel__intval(evsel, sample, "order"); unsigned int gfp_flags = evsel__intval(evsel, sample, "gfp_flags"); unsigned int migrate_type = 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 = evsel__intval(evsel, sample, "pfn"); else page = 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 evsel__process_page_free_event(struct evsel *evsel, struct perf_sample *sample) { u64 page; unsigned int order = 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 = evsel__intval(evsel, sample, "pfn"); else page = 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 evsel *evsel, struct perf_sample *sample); static int process_sample_event(const struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct 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(thread)); if (evsel->handler != NULL) { tracepoint_handler f = evsel->handler; err = f(evsel, sample); } thread__put(thread); return err; } 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 evsel *evsel; const struct evsel_str_handler kmem_tracepoints[] = { /* slab allocator */ { "kmem:kmalloc", evsel__process_alloc_event, }, { "kmem:kmem_cache_alloc", evsel__process_alloc_event, }, { "kmem:kmalloc_node", evsel__process_alloc_event, }, { "kmem:kmem_cache_alloc_node", evsel__process_alloc_event, }, { "kmem:kfree", evsel__process_free_event, }, { "kmem:kmem_cache_free", evsel__process_free_event, }, /* page allocator */ { "kmem:mm_page_alloc", evsel__process_page_alloc_event, }, { "kmem:mm_page_free", 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 (evsel__name_is(evsel, "kmem:mm_page_alloc") && 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 bool slab_legacy_tp_is_exposed(void) { /* * The tracepoints "kmem:kmalloc_node" and * "kmem:kmem_cache_alloc_node" have been removed on the latest * kernel, if the tracepoint "kmem:kmalloc_node" is existed it * means the tool is running on an old kernel, we need to * rollback to support these legacy tracepoints. */ return IS_ERR(trace_event__tp_format("kmem", "kmalloc_node")) ? false : true; } 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:kfree", "-e", "kmem:kmem_cache_alloc", "-e", "kmem:kmem_cache_free", }; const char * const slab_legacy_events[] = { "-e", "kmem:kmalloc_node", "-e", "kmem:kmem_cache_alloc_node", }; 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; unsigned int slab_legacy_tp_exposed = slab_legacy_tp_is_exposed(); rec_argc = ARRAY_SIZE(record_args) + argc - 1; if (kmem_slab) { rec_argc += ARRAY_SIZE(slab_events); if (slab_legacy_tp_exposed) rec_argc += ARRAY_SIZE(slab_legacy_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 (slab_legacy_tp_exposed) { for (j = 0; j < ARRAY_SIZE(slab_legacy_events); j++, i++) rec_argv[i] = strdup(slab_legacy_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; struct perf_tool perf_kmem; static 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, PARSE_OPT_STOP_AT_NON_OPTION); 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 (strlen(argv[0]) > 2 && strstarts("record", argv[0])) { symbol__init(NULL); return __cmd_record(argc, argv); } data.path = input_name; perf_tool__init(&perf_kmem, /*ordered_events=*/true); perf_kmem.sample = process_sample_event; perf_kmem.comm = perf_event__process_comm; perf_kmem.mmap = perf_event__process_mmap; perf_kmem.mmap2 = perf_event__process_mmap2; perf_kmem.namespaces = perf_event__process_namespaces; kmem_session = session = perf_session__new(&data, &perf_kmem); if (IS_ERR(session)) return PTR_ERR(session); ret = -1; if (kmem_slab) { if (!evlist__find_tracepoint_by_name(session->evlist, "kmem:kmalloc")) { pr_err(errmsg, "slab", "slab"); goto out_delete; } } if (kmem_page) { struct evsel *evsel = 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->tep); 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); /* free usage string allocated by parse_options_subcommand */ free((void *)kmem_usage[0]); return ret; }
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