Re: [PATCH 3/9] perf kmem: Analyze page allocator events also
From: Arnaldo Carvalho de Melo
Date: Fri Apr 10 2015 - 17:06:36 EST
Em Mon, Apr 06, 2015 at 02:36:10PM +0900, Namhyung Kim escreveu:
> The perf kmem command records and analyze kernel memory allocation
> only for SLAB objects. This patch implement a simple page allocator
> analyzer using kmem:mm_page_alloc and kmem:mm_page_free events.
>
> It adds two new options of --slab and --page. The --slab option is
> for analyzing SLAB allocator and that's what perf kmem currently does.
>
> The new --page option enables page allocator events and analyze kernel
> memory usage in page unit. Currently, 'stat --alloc' subcommand is
> implemented only.
>
> If none of these --slab nor --page is specified, --slab is implied.
>
> # perf kmem stat --page --alloc --line 10
Hi, applied the first patch, the kernel one, reboot with that kernel:
[root@ssdandy ~]# cat /t/events/kmem/mm_page_free/format
name: mm_page_free
ID: 367
format:
field:unsigned short common_type; offset:0; size:2; signed:0;
field:unsigned char common_flags; offset:2; size:1; signed:0;
field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
field:int common_pid; offset:4; size:4; signed:1;
field:unsigned long pfn; offset:8; size:8; signed:0;
field:unsigned int order; offset:16; size:4; signed:0;
print fmt: "page=%p pfn=%lu order=%d", (((struct page *)(0xffffea0000000000UL)) + (REC->pfn)), REC->pfn, REC->order
[root@ssdandy ~]#
Then did:
[root@ssdandy ~]# perf kmem record
^C[ perf record: Woken up 0 times to write data ]
per[ perf record: Captured and wrote 624.101 MB perf.data (7022790 samples) ]
[root@ssdandy ~]# perf evlist
kmem:kmalloc
kmem:kmalloc_node
kmem:kfree
kmem:kmem_cache_alloc
kmem:kmem_cache_alloc_node
kmem:kmem_cache_free
[root@ssdandy ~]# ls -la perf.data
-rw-------. 1 root root 659632943 Apr 10 18:05 perf.data
[root@ssdandy ~]#
But I only get:
[root@ssdandy ~]# perf kmem stat --page --alloc
Warning:
188 out of order events recorded.
--------------------------------------------------------------------------------
Page | Total alloc (KB) | Hits | Order | Mig.type | GFP flags
--------------------------------------------------------------------------------
... | ... | ... | ... | ... | ...
--------------------------------------------------------------------------------
SUMMARY (page allocator)
========================
Total allocation requests : 0 [ 0 KB ]
Total free requests : 0 [ 0 KB ]
Total alloc+freed requests : 0 [ 0 KB ]
Total alloc-only requests : 0 [ 0 KB ]
Total free-only requests : 0 [ 0 KB ]
Total allocation failures : 0 [ 0 KB ]
Order Unmovable Reclaimable Movable Reserved CMA/Isolated
----- ------------ ------------ ------------ ------------ ------------
0 . . . . .
1 . . . . .
2 . . . . .
3 . . . . .
4 . . . . .
5 . . . . .
6 . . . . .
7 . . . . .
8 . . . . .
9 . . . . .
10 . . . . .
[root@ssdandy ~]#
What am I missing?
- Arnaldo
> -------------------------------------------------------------------------------
> PFN | Total alloc (KB) | Hits | Order | Mig.type | GFP flags
> -------------------------------------------------------------------------------
> 4045014 | 16 | 1 | 2 | RECLAIM | 00285250
> 4143980 | 16 | 1 | 2 | RECLAIM | 00285250
> 3938658 | 16 | 1 | 2 | RECLAIM | 00285250
> 4045400 | 16 | 1 | 2 | RECLAIM | 00285250
> 3568708 | 16 | 1 | 2 | RECLAIM | 00285250
> 3729824 | 16 | 1 | 2 | RECLAIM | 00285250
> 3657210 | 16 | 1 | 2 | RECLAIM | 00285250
> 4120750 | 16 | 1 | 2 | RECLAIM | 00285250
> 3678850 | 16 | 1 | 2 | RECLAIM | 00285250
> 3693874 | 16 | 1 | 2 | RECLAIM | 00285250
> ... | ... | ... | ... | ... | ...
> -------------------------------------------------------------------------------
>
> SUMMARY (page allocator)
> ========================
> Total allocation requests : 44,260 [ 177,256 KB ]
> Total free requests : 117 [ 468 KB ]
>
> Total alloc+freed requests : 49 [ 196 KB ]
> Total alloc-only requests : 44,211 [ 177,060 KB ]
> Total free-only requests : 68 [ 272 KB ]
>
> Total allocation failures : 0 [ 0 KB ]
>
> Order Unmovable Reclaimable Movable Reserved CMA/Isolated
> ----- ------------ ------------ ------------ ------------ ------------
> 0 32 . 44,210 . .
> 1 . . . . .
> 2 . 18 . . .
> 3 . . . . .
> 4 . . . . .
> 5 . . . . .
> 6 . . . . .
> 7 . . . . .
> 8 . . . . .
> 9 . . . . .
> 10 . . . . .
>
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> ---
> tools/perf/Documentation/perf-kmem.txt | 8 +-
> tools/perf/builtin-kmem.c | 500 +++++++++++++++++++++++++++++++--
> 2 files changed, 491 insertions(+), 17 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-kmem.txt b/tools/perf/Documentation/perf-kmem.txt
> index 150253cc3c97..23219c65c16f 100644
> --- a/tools/perf/Documentation/perf-kmem.txt
> +++ b/tools/perf/Documentation/perf-kmem.txt
> @@ -3,7 +3,7 @@ perf-kmem(1)
>
> NAME
> ----
> -perf-kmem - Tool to trace/measure kernel memory(slab) properties
> +perf-kmem - Tool to trace/measure kernel memory properties
>
> SYNOPSIS
> --------
> @@ -46,6 +46,12 @@ OPTIONS
> --raw-ip::
> Print raw ip instead of symbol
>
> +--slab::
> + Analyze SLAB allocator events.
> +
> +--page::
> + Analyze page allocator events
> +
> SEE ALSO
> --------
> linkperf:perf-record[1]
> diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
> index 4ebf65c79434..63ea01349b6e 100644
> --- a/tools/perf/builtin-kmem.c
> +++ b/tools/perf/builtin-kmem.c
> @@ -22,6 +22,11 @@
> #include <linux/string.h>
> #include <locale.h>
>
> +static int kmem_slab;
> +static int kmem_page;
> +
> +static long kmem_page_size;
> +
> struct alloc_stat;
> typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
>
> @@ -226,6 +231,244 @@ static int perf_evsel__process_free_event(struct perf_evsel *evsel,
> 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;
> +
> +#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;
> + 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_tree;
> +static struct rb_root page_alloc_tree;
> +static struct rb_root page_alloc_sorted;
> +
> +static struct page_stat *search_page(unsigned long page, bool create)
> +{
> + struct rb_node **node = &page_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 - 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 = page;
> +
> + rb_link_node(&data->node, parent, node);
> + rb_insert_color(&data->node, &page_tree);
> + }
> +
> + return data;
> +}
> +
> +static int page_stat_cmp(struct page_stat *a, struct page_stat *b)
> +{
> + if (a->page > b->page)
> + return -1;
> + if (a->page < b->page)
> + return 1;
> + if (a->order > b->order)
> + return -1;
> + if (a->order < b->order)
> + return 1;
> + if (a->migrate_type > b->migrate_type)
> + return -1;
> + if (a->migrate_type < b->migrate_type)
> + return 1;
> + if (a->gfp_flags > b->gfp_flags)
> + return -1;
> + if (a->gfp_flags < b->gfp_flags)
> + return 1;
> + return 0;
> +}
> +
> +static struct page_stat *search_page_alloc_stat(struct page_stat *stat, bool create)
> +{
> + struct rb_node **node = &page_alloc_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 = page_stat_cmp(data, stat);
> + 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 = stat->page;
> + data->order = stat->order;
> + data->gfp_flags = stat->gfp_flags;
> + data->migrate_type = stat->migrate_type;
> +
> + rb_link_node(&data->node, parent, node);
> + rb_insert_color(&data->node, &page_alloc_tree);
> + }
> +
> + return data;
> +}
> +
> +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;
> +}
> +
> +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;
> + struct page_stat *stat;
> + 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;
> + }
> +
> + /*
> + * This is to find the current page (with correct gfp flags and
> + * migrate type) at free event.
> + */
> + stat = search_page(page, true);
> + if (stat == NULL)
> + return -ENOMEM;
> +
> + stat->order = order;
> + stat->gfp_flags = gfp_flags;
> + stat->migrate_type = migrate_type;
> +
> + this.page = page;
> + stat = search_page_alloc_stat(&this, true);
> + if (stat == NULL)
> + return -ENOMEM;
> +
> + stat->nr_alloc++;
> + stat->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 *stat;
> + 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;
> +
> + stat = search_page(page, false);
> + if (stat == NULL) {
> + pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
> + page, order);
> +
> + nr_page_nomatch++;
> + total_page_nomatch_bytes += bytes;
> +
> + return 0;
> + }
> +
> + this.page = page;
> + this.gfp_flags = stat->gfp_flags;
> + this.migrate_type = stat->migrate_type;
> +
> + rb_erase(&stat->node, &page_tree);
> + free(stat);
> +
> + stat = search_page_alloc_stat(&this, false);
> + if (stat == NULL)
> + return -ENOENT;
> +
> + stat->nr_free++;
> + stat->free_bytes += bytes;
> +
> + return 0;
> +}
> +
> typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
> struct perf_sample *sample);
>
> @@ -270,8 +513,9 @@ static double fragmentation(unsigned long n_req, unsigned long n_alloc)
> return 100.0 - (100.0 * n_req / n_alloc);
> }
>
> -static void __print_result(struct rb_root *root, struct perf_session *session,
> - int n_lines, int is_caller)
> +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;
> @@ -323,9 +567,56 @@ static void __print_result(struct rb_root *root, struct perf_session *session,
> printf("%.105s\n", graph_dotted_line);
> }
>
> -static void print_summary(void)
> +static const char * const migrate_type_str[] = {
> + "UNMOVABL",
> + "RECLAIM",
> + "MOVABLE",
> + "RESERVED",
> + "CMA/ISLT",
> + "UNKNOWN",
> +};
> +
> +static void __print_page_result(struct rb_root *root,
> + struct perf_session *session __maybe_unused,
> + int n_lines)
> +{
> + struct rb_node *next = rb_first(root);
> + const char *format;
> +
> + printf("\n%.80s\n", graph_dotted_line);
> + printf(" %-16s | Total alloc (KB) | Hits | Order | Mig.type | GFP flags\n",
> + use_pfn ? "PFN" : "Page");
> + printf("%.80s\n", graph_dotted_line);
> +
> + if (use_pfn)
> + format = " %16llu | %'16llu | %'9d | %5d | %8s | %08lx\n";
> + else
> + format = " %016llx | %'16llu | %'9d | %5d | %8s | %08lx\n";
> +
> + while (next && n_lines--) {
> + struct page_stat *data;
> +
> + data = rb_entry(next, struct page_stat, node);
> +
> + 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],
> + (unsigned long)data->gfp_flags);
> +
> + next = rb_next(next);
> + }
> +
> + if (n_lines == -1)
> + printf(" ... | ... | ... | ... | ... | ... \n");
> +
> + printf("%.80s\n", graph_dotted_line);
> +}
> +
> +static void print_slab_summary(void)
> {
> - printf("\nSUMMARY\n=======\n");
> + 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 wasted on internal fragmentation: %'lu\n",
> @@ -335,13 +626,73 @@ static void print_summary(void)
> printf("Cross CPU allocations: %'lu/%'lu\n", nr_cross_allocs, nr_allocs);
> }
>
> -static void print_result(struct perf_session *session)
> +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: %'16lu [ %'16"PRIu64" KB ]\n", "Total alloc+freed requests",
> + nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
> + printf("%-30s: %'16lu [ %'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_result(&root_caller_sorted, session, caller_lines, 1);
> + __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 (alloc_flag)
> - __print_result(&root_alloc_sorted, session, alloc_lines, 0);
> - print_summary();
> + __print_page_result(&page_alloc_sorted, 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);
> }
>
> struct sort_dimension {
> @@ -353,8 +704,8 @@ struct sort_dimension {
> static LIST_HEAD(caller_sort);
> static LIST_HEAD(alloc_sort);
>
> -static void sort_insert(struct rb_root *root, struct alloc_stat *data,
> - struct list_head *sort_list)
> +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;
> @@ -383,8 +734,8 @@ static void sort_insert(struct rb_root *root, struct alloc_stat *data,
> rb_insert_color(&data->node, root);
> }
>
> -static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
> - struct list_head *sort_list)
> +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;
> @@ -396,26 +747,79 @@ static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
>
> rb_erase(node, root);
> data = rb_entry(node, struct alloc_stat, node);
> - sort_insert(root_sorted, data, sort_list);
> + sort_slab_insert(root_sorted, data, sort_list);
> + }
> +}
> +
> +static void sort_page_insert(struct rb_root *root, struct page_stat *data)
> +{
> + struct rb_node **new = &root->rb_node;
> + struct rb_node *parent = NULL;
> +
> + while (*new) {
> + struct page_stat *this;
> + int cmp = 0;
> +
> + this = rb_entry(*new, struct page_stat, node);
> + parent = *new;
> +
> + /* TODO: support more sort key */
> + cmp = data->alloc_bytes - this->alloc_bytes;
> +
> + 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 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);
> }
> }
>
> static void sort_result(void)
> {
> - __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
> - __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
> + if (kmem_slab) {
> + __sort_slab_result(&root_alloc_stat, &root_alloc_sorted,
> + &alloc_sort);
> + __sort_slab_result(&root_caller_stat, &root_caller_sorted,
> + &caller_sort);
> + }
> + if (kmem_page) {
> + __sort_page_result(&page_alloc_tree, &page_alloc_sorted);
> + }
> }
>
> 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"))
> @@ -426,10 +830,20 @@ static int __cmd_kmem(struct perf_session *session)
> goto out;
> }
>
> + evlist__for_each(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)
> + if (err != 0) {
> + pr_err("error during process events: %d\n", err);
> goto out;
> + }
> sort_result();
> print_result(session);
> out:
> @@ -612,6 +1026,22 @@ static int parse_alloc_opt(const struct option *opt __maybe_unused,
> 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)
> {
> @@ -634,6 +1064,8 @@ 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",
> @@ -641,10 +1073,19 @@ static int __cmd_record(int argc, const char **argv)
> "-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);
> +
> rec_argv = calloc(rec_argc + 1, sizeof(char *));
>
> if (rec_argv == NULL)
> @@ -653,6 +1094,15 @@ static int __cmd_record(int argc, const char **argv)
> 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) {
> + 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];
>
> @@ -679,6 +1129,10 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
> 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", &file.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_END()
> };
> const char *const kmem_subcommands[] = { "record", "stat", NULL };
> @@ -695,6 +1149,9 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
> if (!argc)
> usage_with_options(kmem_usage, kmem_options);
>
> + if (kmem_slab == 0 && kmem_page == 0)
> + kmem_slab = 1; /* for backward compatibility */
> +
> if (!strncmp(argv[0], "rec", 3)) {
> symbol__init(NULL);
> return __cmd_record(argc, argv);
> @@ -706,6 +1163,17 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
> if (session == NULL)
> return -1;
>
> + if (kmem_page) {
> + struct perf_evsel *evsel = perf_evlist__first(session->evlist);
> +
> + if (evsel == NULL || evsel->tp_format == NULL) {
> + pr_err("invalid event found.. aborting\n");
> + return -1;
> + }
> +
> + kmem_page_size = pevent_get_page_size(evsel->tp_format->pevent);
> + }
> +
> symbol__init(&session->header.env);
>
> if (!strcmp(argv[0], "stat")) {
> --
> 2.3.2
--
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