forked from Minki/linux
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>
This commit is contained in:
Namhyung Kim
Arnaldo Carvalho de Melo
parent
fb4f313d30
commit
2a7ef02c9c
@ -56,6 +56,11 @@ OPTIONS
|
||||
--page::
|
||||
Analyze page allocator events
|
||||
|
||||
--live::
|
||||
Show live page stat. The perf kmem shows total allocation stat by
|
||||
default, but this option shows live (currently allocated) pages
|
||||
instead. (This option works with --page option only)
|
||||
|
||||
SEE ALSO
|
||||
--------
|
||||
linkperf:perf-record[1]
|
||||
|
||||
@ -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 };
|
||||
|
||||
Loading…
Reference in New Issue
Block a user