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authorNamhyung Kim <namhyung@kernel.org>2015-04-21 13:55:04 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-04 13:34:47 -0300
commit2a7ef02c9ca0172cd48945407893f38c2438e754 (patch)
tree628fd9ac7c2432298f199e3ef65a052812c148a2 /tools/perf/builtin-kmem.c
parentfb4f313d304b0a5120e870a6cd9ecf90c1023037 (diff)
downloadlinux-2a7ef02c9ca0172cd48945407893f38c2438e754.tar.gz
perf kmem: Add --live option for current allocation stat
Currently 'perf kmem stat --page' shows total (page) allocation stat by default, but sometimes one might want to see live (total alloc-only) requests/pages only. The new --live option does this by subtracting freed allocation from the stat. E.g.: # perf kmem stat --page SUMMARY (page allocator) ======================== Total allocation requests : 988,858 [ 4,045,368 KB ] Total free requests : 886,484 [ 3,624,996 KB ] Total alloc+freed requests : 885,969 [ 3,622,628 KB ] Total alloc-only requests : 102,889 [ 422,740 KB ] Total free-only requests : 515 [ 2,368 KB ] Total allocation failures : 0 [ 0 KB ] Order Unmovable Reclaimable Movable Reserved CMA/Isolated ----- ------------ ------------ ------------ ------------ ------------ 0 172,173 3,083 806,686 . . 1 284 . . . . 2 6,124 58 . . . 3 114 335 . . . 4 . . . . . 5 . . . . . 6 . . . . . 7 . . . . . 8 . . . . . 9 . . 1 . . 10 . . . . . # perf kmem stat --page --live SUMMARY (page allocator) ======================== Total allocation requests : 988,858 [ 4,045,368 KB ] Total free requests : 886,484 [ 3,624,996 KB ] Total alloc+freed requests : 885,969 [ 3,622,628 KB ] Total alloc-only requests : 102,889 [ 422,740 KB ] Total free-only requests : 515 [ 2,368 KB ] Total allocation failures : 0 [ 0 KB ] Order Unmovable Reclaimable Movable Reserved CMA/Isolated ----- ------------ ------------ ------------ ------------ ------------ 0 2,214 3,025 97,156 . . 1 59 . . . . 2 19 58 . . . 3 23 335 . . . 4 . . . . . 5 . . . . . 6 . . . . . 7 . . . . . 8 . . . . . 9 . . . . . 10 . . . . . # Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Pekka Enberg <penberg@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joonsoo Kim <js1304@gmail.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1429592107-1807-4-git-send-email-namhyung@kernel.org [ Added examples to the changeset log ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kmem.c')
-rw-r--r--tools/perf/builtin-kmem.c110
1 files changed, 68 insertions, 42 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 0393a7f3fa35..7ead9423fd7a 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -244,6 +244,7 @@ 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
@@ -264,7 +265,7 @@ struct page_stat {
int nr_free;
};
-static struct rb_root page_tree;
+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;
@@ -403,10 +404,19 @@ out:
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(u64 page, bool create)
+__page_stat__findnew_page(struct page_stat *pstat, bool create)
{
- struct rb_node **node = &page_tree.rb_node;
+ struct rb_node **node = &page_live_tree.rb_node;
struct rb_node *parent = NULL;
struct page_stat *data;
@@ -416,7 +426,7 @@ __page_stat__findnew_page(u64 page, bool create)
parent = *node;
data = rb_entry(*node, struct page_stat, node);
- cmp = data->page - page;
+ cmp = data->page - pstat->page;
if (cmp < 0)
node = &parent->rb_left;
else if (cmp > 0)
@@ -430,34 +440,28 @@ __page_stat__findnew_page(u64 page, bool create)
data = zalloc(sizeof(*data));
if (data != NULL) {
- data->page = page;
+ 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_tree);
+ rb_insert_color(&data->node, &page_live_tree);
}
return data;
}
-static struct page_stat *page_stat__find_page(u64 page)
+static struct page_stat *page_stat__find_page(struct page_stat *pstat)
{
- return __page_stat__findnew_page(page, false);
+ return __page_stat__findnew_page(pstat, false);
}
-static struct page_stat *page_stat__findnew_page(u64 page)
+static struct page_stat *page_stat__findnew_page(struct page_stat *pstat)
{
- return __page_stat__findnew_page(page, true);
+ return __page_stat__findnew_page(pstat, true);
}
-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_alloc(struct page_stat *pstat, bool create)
{
@@ -615,17 +619,8 @@ static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
* This is to find the current page (with correct gfp flags and
* migrate type) at free event.
*/
- pstat = page_stat__findnew_page(page);
- if (pstat == NULL)
- return -ENOMEM;
-
- pstat->order = order;
- pstat->gfp_flags = gfp_flags;
- pstat->migrate_type = migrate_type;
- pstat->callsite = callsite;
-
this.page = page;
- pstat = page_stat__findnew_alloc(&this);
+ pstat = page_stat__findnew_page(&this);
if (pstat == NULL)
return -ENOMEM;
@@ -633,6 +628,16 @@ static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
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)
@@ -665,7 +670,8 @@ static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
nr_page_frees++;
total_page_free_bytes += bytes;
- pstat = page_stat__find_page(page);
+ this.page = page;
+ pstat = page_stat__find_page(&this);
if (pstat == NULL) {
pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
page, order);
@@ -676,20 +682,23 @@ static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
return 0;
}
- this.page = page;
this.gfp_flags = pstat->gfp_flags;
this.migrate_type = pstat->migrate_type;
this.callsite = pstat->callsite;
- rb_erase(&pstat->node, &page_tree);
+ rb_erase(&pstat->node, &page_live_tree);
free(pstat);
- pstat = page_stat__find_alloc(&this);
- if (pstat == NULL)
- return -ENOENT;
+ 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->nr_free++;
+ pstat->free_bytes += bytes;
+ }
pstat = page_stat__find_caller(&this);
if (pstat == NULL)
@@ -698,6 +707,16 @@ static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
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;
}
@@ -815,8 +834,8 @@ static void __print_page_alloc_result(struct perf_session *session, int n_lines)
const char *format;
printf("\n%.105s\n", graph_dotted_line);
- printf(" %-16s | Total alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite\n",
- use_pfn ? "PFN" : "Page");
+ printf(" %-16s | %5s alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite\n",
+ use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total");
printf("%.105s\n", graph_dotted_line);
if (use_pfn)
@@ -860,7 +879,8 @@ static void __print_page_caller_result(struct perf_session *session, int n_lines
struct machine *machine = &session->machines.host;
printf("\n%.105s\n", graph_dotted_line);
- printf(" Total alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite\n");
+ printf(" %5s alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite\n",
+ live_page ? "Live" : "Total");
printf("%.105s\n", graph_dotted_line);
while (next && n_lines--) {
@@ -1085,8 +1105,13 @@ static void sort_result(void)
&slab_caller_sort);
}
if (kmem_page) {
- __sort_page_result(&page_alloc_tree, &page_alloc_sorted,
- &page_alloc_sort);
+ 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);
}
@@ -1630,6 +1655,7 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
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_END()
};
const char *const kmem_subcommands[] = { "record", "stat", NULL };