diff options
| -rw-r--r-- | tools/perf/builtin-kmem.c | 222 |
1 files changed, 209 insertions, 13 deletions
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index 7ead942..1c66895 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -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) |