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perf kmem: Print gfp flags in human readable string

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Save libtraceevent output and print it in the header.

  # perf kmem stat --page --caller
  #
  # GFP flags
  # ---------
  # 00000010:       NI: GFP_NOIO
  # 000000d0:        K: GFP_KERNEL
  # 00000200:      NWR: GFP_NOWARN
  # 000084d0:    K|R|Z: GFP_KERNEL|GFP_REPEAT|GFP_ZERO
  # 000200d2:       HU: GFP_HIGHUSER
  # 000200da:      HUM: GFP_HIGHUSER_MOVABLE
  # 000280da:    HUM|Z: GFP_HIGHUSER_MOVABLE|GFP_ZERO
  # 002084d0: K|R|Z|NT: GFP_KERNEL|GFP_REPEAT|GFP_ZERO|GFP_NOTRACK
  # 0102005a:  NF|HW|M: GFP_NOFS|GFP_HARDWALL|GFP_MOVABLE

  ---------------------------------------------------------------------------------------------------------
   Total alloc (KB) | Hits      | Order | Mig.type | GFP flags | Callsite
  ---------------------------------------------------------------------------------------------------------
                 60 |        15 |     0 | UNMOVABL | K|R|Z|NT  | pte_alloc_one
                 40 |        10 |     0 |  MOVABLE | HUM|Z     | handle_mm_fault
                 24 |         6 |     0 |  MOVABLE | HUM       | do_wp_page
                 24 |         6 |     0 | UNMOVABL | K         | __pollwait
   ...

Requested-by: Joonsoo Kim <js1304@gmail.com>
Suggested-by: Minchan Kim <minchan@kernel.org>
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: 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/1429592107-1807-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2015-04-21 13:55:05 +09:00 committed by Arnaldo Carvalho de Melo
parent 2a7ef02c9c
commit 0e11115644
1 changed files with 209 additions and 13 deletions
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222
tools/perf/builtin-kmem.c
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@ -581,6 +581,176 @@ static bool valid_page(u64 pfn_or_page)
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/gfpflags.h */
static const struct {
const char *original;
const char *compact;
} gfp_compact_table[] = {
{ "GFP_TRANSHUGE", "THP" },
{ "GFP_HIGHUSER_MOVABLE", "HUM" },
{ "GFP_HIGHUSER", "HU" },
{ "GFP_USER", "U" },
{ "GFP_TEMPORARY", "TMP" },
{ "GFP_KERNEL", "K" },
{ "GFP_NOFS", "NF" },
{ "GFP_ATOMIC", "A" },
{ "GFP_NOIO", "NI" },
{ "GFP_HIGH", "H" },
{ "GFP_WAIT", "W" },
{ "GFP_IO", "I" },
{ "GFP_COLD", "CO" },
{ "GFP_NOWARN", "NWR" },
{ "GFP_REPEAT", "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_NOTRACK", "NT" },
{ "GFP_NO_KSWAPD", "NK" },
{ "GFP_OTHER_NODE", "ON" },
{ "GFP_NOWAIT", "NW" },
};
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;
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);
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 perf_evsel *evsel, struct perf_sample *sample,
unsigned int gfp_flags)
{
struct pevent_record record = {
.cpu = sample->cpu,
.data = sample->raw_data,
.size = sample->raw_size,
};
struct trace_seq seq;
char *str, *pos;
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);
pevent_event_info(&seq, evsel->tp_format, &record);
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 perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
@ -613,6 +783,9 @@ static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
return 0;
}
if (parse_gfp_flags(evsel, sample, gfp_flags) < 0)
return -1;
callsite = find_callsite(evsel, sample);
/*
@ -832,16 +1005,18 @@ 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 | GFP flags | Callsite\n",
use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total");
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 | %08lx | %s\n";
format = " %16llu | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
else
format = " %016llx | %'16llu | %'9d | %5d | %8s | %08lx | %s\n";
format = " %016llx | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
while (next && n_lines--) {
struct page_stat *data;
@ -862,13 +1037,15 @@ static void __print_page_alloc_result(struct perf_session *session, int n_lines)
(unsigned long long)data->alloc_bytes / 1024,
data->nr_alloc, data->order,
migrate_type_str[data->migrate_type],
(unsigned long)data->gfp_flags, caller);
gfp_len, compact_gfp_string(data->gfp_flags), caller);
next = rb_next(next);
}
if (n_lines == -1)
printf(" ... | ... | ... | ... | ... | ... | ...\n");
if (n_lines == -1) {
printf(" ... | ... | ... | ... | ... | %-*s | ...\n",
gfp_len, "...");
}
printf("%.105s\n", graph_dotted_line);
}
@ -877,10 +1054,11 @@ 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 | GFP flags | Callsite\n",
live_page ? "Live" : "Total");
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--) {
@ -898,21 +1076,37 @@ static void __print_page_caller_result(struct perf_session *session, int n_lines
else
scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
printf(" %'16llu | %'9d | %5d | %8s | %08lx | %s\n",
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],
(unsigned long)data->gfp_flags, caller);
gfp_len, compact_gfp_string(data->gfp_flags), caller);
next = rb_next(next);
}
if (n_lines == -1)
printf(" ... | ... | ... | ... | ... | ...\n");
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)");
@ -982,6 +1176,8 @@ static void print_slab_result(struct perf_session *session)
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)