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-rw-r--r--tools/perf/builtin-kmem.c237
1 files changed, 142 insertions, 95 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index b63bca4b0c2a..7929a5fa5f46 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -1,11 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
#include "builtin.h"
-#include "perf.h"
+#include "util/dso.h"
#include "util/evlist.h"
#include "util/evsel.h"
-#include "util/util.h"
#include "util/config.h"
+#include "util/map.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
@@ -13,23 +13,30 @@
#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 "sane_ctype.h"
+#include <linux/ctype.h>
+#include <event-parse.h>
static int kmem_slab;
static int kmem_page;
@@ -164,13 +171,12 @@ static int insert_caller_stat(unsigned long call_site,
return 0;
}
-static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
- struct perf_sample *sample)
+static int evsel__process_alloc_event(struct 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");
+ 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))
@@ -180,23 +186,33 @@ static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
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);
+ /*
+ * 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;
- if (!ret) {
- int node1 = cpu__get_node(sample->cpu),
- node2 = perf_evsel__intval(evsel, sample, "node");
+ node1 = cpu__get_node((struct perf_cpu){.cpu = sample->cpu});
+ node2 = evsel__intval(evsel, sample, "node");
- if (node1 != node2)
+ /*
+ * 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 ret;
+ return 0;
}
static int ptr_cmp(void *, void *);
@@ -227,10 +243,9 @@ static struct alloc_stat *search_alloc_stat(unsigned long ptr,
return NULL;
}
-static int perf_evsel__process_free_event(struct perf_evsel *evsel,
- struct perf_sample *sample)
+static int evsel__process_free_event(struct evsel *evsel, struct perf_sample *sample)
{
- unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
+ 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);
@@ -334,7 +349,7 @@ static int build_alloc_func_list(void)
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?";
+ static const char pattern[] = "^_?_?(alloc|get_free|get_zeroed)_pages?";
ret = regcomp(&alloc_func_regex, pattern, REG_EXTENDED);
if (ret) {
@@ -379,26 +394,34 @@ static int build_alloc_func_list(void)
* 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)
+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);
- sample__resolve_callchain(sample, &callchain_cursor, NULL, evsel, &al, 16);
- callchain_cursor_commit(&callchain_cursor);
+ 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(&callchain_cursor);
+ node = callchain_cursor_current(cursor);
if (node == NULL)
break;
@@ -407,21 +430,23 @@ static u64 find_callsite(struct perf_evsel *evsel, struct perf_sample *sample)
sizeof(key), callcmp);
if (!caller) {
/* found */
- if (node->map)
- addr = map__unmap_ip(node->map, node->ip);
+ if (node->ms.map)
+ addr = map__dso_unmap_ip(node->ms.map, node->ip);
else
addr = node->ip;
- return addr;
+ result = addr;
+ goto out;
} else
pr_debug3("skipping alloc function: %s\n", caller->name);
- callchain_cursor_advance(&callchain_cursor);
+ callchain_cursor_advance(cursor);
}
-out:
pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip);
- return sample->ip;
+out:
+ addr_location__exit(&al);
+ return result;
}
struct sort_dimension {
@@ -638,7 +663,6 @@ static const struct {
{ "__GFP_HIGHMEM", "HM" },
{ "GFP_DMA32", "D32" },
{ "__GFP_HIGH", "H" },
- { "__GFP_ATOMIC", "_A" },
{ "__GFP_IO", "I" },
{ "__GFP_FS", "F" },
{ "__GFP_NOWARN", "NWR" },
@@ -686,6 +710,7 @@ static char *compact_gfp_flags(char *gfp_flags)
new = realloc(new_flags, len + strlen(cpt) + 2);
if (new == NULL) {
free(new_flags);
+ free(orig_flags);
return NULL;
}
@@ -726,7 +751,7 @@ static char *compact_gfp_string(unsigned long gfp_flags)
return NULL;
}
-static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
+static int parse_gfp_flags(struct evsel *evsel, struct perf_sample *sample,
unsigned int gfp_flags)
{
struct tep_record record = {
@@ -736,6 +761,7 @@ static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
};
struct trace_seq seq;
char *str, *pos = NULL;
+ const struct tep_event *tp_format;
if (nr_gfps) {
struct gfp_flag key = {
@@ -747,7 +773,9 @@ static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
}
trace_seq_init(&seq);
- tep_event_info(&seq, evsel->tp_format, &record);
+ tp_format = evsel__tp_format(evsel);
+ if (tp_format)
+ tep_print_event(tp_format->tep, &seq, &record, "%s", TEP_PRINT_INFO);
str = strtok_r(seq.buffer, " ", &pos);
while (str) {
@@ -777,13 +805,12 @@ static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
return 0;
}
-static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
- struct perf_sample *sample)
+static int evsel__process_page_alloc_event(struct 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,
+ 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;
@@ -795,9 +822,9 @@ static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
};
if (use_pfn)
- page = perf_evsel__intval(evsel, sample, "pfn");
+ page = evsel__intval(evsel, sample, "pfn");
else
- page = perf_evsel__intval(evsel, sample, "page");
+ page = evsel__intval(evsel, sample, "page");
nr_page_allocs++;
total_page_alloc_bytes += bytes;
@@ -850,11 +877,10 @@ static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
return 0;
}
-static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
- struct perf_sample *sample)
+static int evsel__process_page_free_event(struct evsel *evsel, struct perf_sample *sample)
{
u64 page;
- unsigned int order = perf_evsel__intval(evsel, sample, "order");
+ unsigned int order = evsel__intval(evsel, sample, "order");
u64 bytes = kmem_page_size << order;
struct page_stat *pstat;
struct page_stat this = {
@@ -862,9 +888,9 @@ static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
};
if (use_pfn)
- page = perf_evsel__intval(evsel, sample, "pfn");
+ page = evsel__intval(evsel, sample, "pfn");
else
- page = perf_evsel__intval(evsel, sample, "page");
+ page = evsel__intval(evsel, sample, "page");
nr_page_frees++;
total_page_free_bytes += bytes;
@@ -928,13 +954,13 @@ static bool perf_kmem__skip_sample(struct perf_sample *sample)
return false;
}
-typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
+typedef int (*tracepoint_handler)(struct evsel *evsel,
struct perf_sample *sample);
-static int process_sample_event(struct perf_tool *tool __maybe_unused,
+static int process_sample_event(const struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
- struct perf_evsel *evsel,
+ struct evsel *evsel,
struct machine *machine)
{
int err = 0;
@@ -950,7 +976,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
if (perf_kmem__skip_sample(sample))
return 0;
- dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
+ dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread__tid(thread));
if (evsel->handler != NULL) {
tracepoint_handler f = evsel->handler;
@@ -962,15 +988,6 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
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)
@@ -1010,7 +1027,7 @@ static void __print_slab_result(struct rb_root *root,
if (sym != NULL)
snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
- addr - map->unmap_ip(map, sym->start));
+ addr - map__unmap_ip(map, sym->start));
else
snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
printf(" %-34s |", buf);
@@ -1361,18 +1378,18 @@ static void sort_result(void)
static int __cmd_kmem(struct perf_session *session)
{
int err = -EINVAL;
- struct perf_evsel *evsel;
- const struct perf_evsel_str_handler kmem_tracepoints[] = {
+ struct evsel *evsel;
+ const struct 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, },
+ { "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", perf_evsel__process_page_alloc_event, },
- { "kmem:mm_page_free", perf_evsel__process_page_free_event, },
+ { "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"))
@@ -1384,8 +1401,8 @@ static int __cmd_kmem(struct perf_session *session)
}
evlist__for_each_entry(session->evlist, evsel) {
- if (!strcmp(perf_evsel__name(evsel), "kmem:mm_page_alloc") &&
- perf_evsel__field(evsel, "pfn")) {
+ if (evsel__name_is(evsel, "kmem:mm_page_alloc") &&
+ evsel__field(evsel, "pfn")) {
use_pfn = true;
break;
}
@@ -1821,6 +1838,19 @@ static int parse_line_opt(const struct option *opt __maybe_unused,
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[] = {
@@ -1828,22 +1858,28 @@ static int __cmd_record(int argc, const char **argv)
};
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 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)
+ 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 */
@@ -1858,6 +1894,10 @@ static int __cmd_record(int argc, const char **argv)
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");
@@ -1924,14 +1964,16 @@ int cmd_kmem(int argc, const char **argv)
NULL
};
struct perf_session *session;
- const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
+ 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, 0);
+ kmem_subcommands, kmem_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(kmem_usage, kmem_options);
@@ -1943,42 +1985,46 @@ int cmd_kmem(int argc, const char **argv)
kmem_page = 1;
}
- if (!strncmp(argv[0], "rec", 3)) {
+ if (strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
symbol__init(NULL);
return __cmd_record(argc, argv);
}
- data.file.path = input_name;
+ data.path = input_name;
- kmem_session = session = perf_session__new(&data, false, &perf_kmem);
- if (session == NULL)
- return -1;
+ 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 (!perf_evlist__find_tracepoint_by_name(session->evlist,
- "kmem:kmalloc")) {
+ if (!evlist__find_tracepoint_by_name(session->evlist, "kmem:kmalloc")) {
pr_err(errmsg, "slab", "slab");
goto out_delete;
}
}
if (kmem_page) {
- struct perf_evsel *evsel;
+ struct evsel *evsel = evlist__find_tracepoint_by_name(session->evlist, "kmem:mm_page_alloc");
+ const struct tep_event *tp_format = evsel ? evsel__tp_format(evsel) : NULL;
- evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
- "kmem:mm_page_alloc");
- if (evsel == NULL) {
+ if (tp_format == NULL) {
pr_err(errmsg, "page", "page");
goto out_delete;
}
-
- kmem_page_size = tep_get_page_size(evsel->tp_format->pevent);
+ kmem_page_size = tep_get_page_size(tp_format->tep);
symbol_conf.use_callchain = true;
}
- symbol__init(&session->header.env);
+ symbol__init(perf_session__env(session));
if (perf_time__parse_str(&ptime, time_str) != 0) {
pr_err("Invalid time string\n");
@@ -2013,7 +2059,8 @@ int cmd_kmem(int argc, const char **argv)
out_delete:
perf_session__delete(session);
+ /* free usage string allocated by parse_options_subcommand */
+ free((void *)kmem_usage[0]);
return ret;
}
-
generated by cgit (git 2.34.1) at 2025-12-24 21:47:56 +0000