Re: [PATCH] perf report: fix handling of memory sampling sort orders

From: Arnaldo Carvalho de Melo
Date: Fri Feb 22 2013 - 13:43:54 EST

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In reply to: Stephane Eranian: "[PATCH] perf report: fix handling of memory sampling sort orders"
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Em Fri, Feb 22, 2013 at 03:28:38PM +0100, Stephane Eranian escreveu:
>
> When the memory sampling sort orders were used on perf.data
> files without memory sampling data, it would crash perf. This
> patch fixes this by handling the lack of memory information
> gracefully, printing N/A and formatting columns correctly
> whenever necessary.
>
> This patch is to be applied on top of the memory sampling
> patchset. It is relative to Arnaldo's perf/mem branch.

Ok, folded that into the original patch, so that we can bisect things in
this area.

Updating the perf/mem branch with this, i.e. force pushed.

- Arnaldo

> Reported-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx>
> ---
>
> diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
> index 4008b7f..98572ca 100644
> --- a/tools/perf/util/event.h
> +++ b/tools/perf/util/event.h
> @@ -99,6 +99,13 @@ struct perf_sample {
> struct stack_dump user_stack;
> };
>
> +#define PERF_MEM_DATA_SRC_NONE \
> + (PERF_MEM_S(OP, NA) |\
> + PERF_MEM_S(LVL, NA) |\
> + PERF_MEM_S(SNOOP, NA) |\
> + PERF_MEM_S(LOCK, NA) |\
> + PERF_MEM_S(TLB, NA))
> +
> struct build_id_event {
> struct perf_event_header header;
> pid_t pid;
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index bace0cc..d1799a4 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -1175,7 +1175,7 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
> array++;
> }
>
> - data->dsrc = 0;
> + data->dsrc = PERF_MEM_DATA_SRC_NONE;
> if (type & PERF_SAMPLE_DATA_SRC) {
> data->dsrc = *array;
> array++;
> diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> index 043593d..454d7f1 100644
> --- a/tools/perf/util/hist.c
> +++ b/tools/perf/util/hist.c
> @@ -118,7 +118,9 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
> hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen);
> hists__set_unres_dso_col_len(hists, HISTC_DSO_TO);
> }
> - } else if (h->mem_info) {
> + }
> +
> + if (h->mem_info) {
> /*
> * +4 accounts for '[x] ' priv level info
> * +2 account of 0x prefix on raw addresses
> @@ -141,11 +143,15 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
> symlen = unresolved_col_width + 4 + 2;
> hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
> }
> - hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
> - hists__new_col_len(hists, HISTC_MEM_TLB, 22);
> - hists__new_col_len(hists, HISTC_MEM_SNOOP, 12);
> - hists__new_col_len(hists, HISTC_MEM_LVL, 21+3);
> + } else {
> + symlen = unresolved_col_width + 4 + 2;
> + hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL, symlen);
> + hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
> }
> + hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
> + hists__new_col_len(hists, HISTC_MEM_TLB, 22);
> + hists__new_col_len(hists, HISTC_MEM_SNOOP, 12);
> + hists__new_col_len(hists, HISTC_MEM_LVL, 21+3);
>
> }
>
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index 1dc3860..0fdaac7 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -198,7 +198,7 @@ static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
> }
>
> ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", level);
> - if (sym) {
> + if (sym && map) {
> if (map->type == MAP__VARIABLE) {
> ret += repsep_snprintf(bf + ret, size - ret, "%s", sym->name);
> ret += repsep_snprintf(bf + ret, size - ret, "+0x%llx",
> @@ -469,39 +469,72 @@ static int hist_entry__mispredict_snprintf(struct hist_entry *self, char *bf,
> static int64_t
> sort__daddr_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - struct addr_map_symbol *l = &left->mem_info->daddr;
> - struct addr_map_symbol *r = &right->mem_info->daddr;
> + uint64_t l = 0, r = 0;
>
> - return (int64_t)(r->addr - l->addr);
> + if (left->mem_info)
> + l = left->mem_info->daddr.addr;
> + if (right->mem_info)
> + r = right->mem_info->daddr.addr;
> +
> + return (int64_t)(r - l);
> }
>
> static int hist_entry__daddr_snprintf(struct hist_entry *self, char *bf,
> size_t size, unsigned int width)
> {
> - return _hist_entry__sym_snprintf(self->mem_info->daddr.map,
> - self->mem_info->daddr.sym,
> - self->mem_info->daddr.addr,
> - self->level, bf, size, width);
> + uint64_t addr = 0;
> + struct map *map = NULL;
> + struct symbol *sym = NULL;
> +
> + if (self->mem_info) {
> + addr = self->mem_info->daddr.addr;
> + map = self->mem_info->daddr.map;
> + sym = self->mem_info->daddr.sym;
> + }
> + return _hist_entry__sym_snprintf(map, sym, addr, self->level, bf, size,
> + width);
> }
>
> static int64_t
> sort__dso_daddr_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - return _sort__dso_cmp(left->mem_info->daddr.map, right->mem_info->daddr.map);
> + struct map *map_l = NULL;
> + struct map *map_r = NULL;
> +
> + if (left->mem_info)
> + map_l = left->mem_info->daddr.map;
> + if (right->mem_info)
> + map_r = right->mem_info->daddr.map;
> +
> + return _sort__dso_cmp(map_l, map_r);
> }
>
> static int hist_entry__dso_daddr_snprintf(struct hist_entry *self, char *bf,
> size_t size, unsigned int width)
> {
> - return _hist_entry__dso_snprintf(self->mem_info->daddr.map, bf, size,
> - width);
> + struct map *map = NULL;
> +
> + if (self->mem_info)
> + map = self->mem_info->daddr.map;
> +
> + return _hist_entry__dso_snprintf(map, bf, size, width);
> }
>
> static int64_t
> sort__locked_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - union perf_mem_data_src dsrc_l = left->mem_info->dsrc;
> - union perf_mem_data_src dsrc_r = right->mem_info->dsrc;
> + union perf_mem_data_src dsrc_l;
> + union perf_mem_data_src dsrc_r;
> +
> + if (left->mem_info)
> + dsrc_l = left->mem_info->dsrc;
> + else
> + dsrc_l.mem_lock = PERF_MEM_LOCK_NA;
> +
> + if (right->mem_info)
> + dsrc_r = right->mem_info->dsrc;
> + else
> + dsrc_r.mem_lock = PERF_MEM_LOCK_NA;
>
> return (int64_t)(dsrc_r.mem_lock - dsrc_l.mem_lock);
> }
> @@ -509,8 +542,11 @@ sort__locked_cmp(struct hist_entry *left, struct hist_entry *right)
> static int hist_entry__locked_snprintf(struct hist_entry *self, char *bf,
> size_t size, unsigned int width)
> {
> - const char *out = "??";
> - u64 mask = self->mem_info->dsrc.mem_lock;
> + const char *out;
> + u64 mask = PERF_MEM_LOCK_NA;
> +
> + if (self->mem_info)
> + mask = self->mem_info->dsrc.mem_lock;
>
> if (mask & PERF_MEM_LOCK_NA)
> out = "N/A";
> @@ -525,8 +561,18 @@ static int hist_entry__locked_snprintf(struct hist_entry *self, char *bf,
> static int64_t
> sort__tlb_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - union perf_mem_data_src dsrc_l = left->mem_info->dsrc;
> - union perf_mem_data_src dsrc_r = right->mem_info->dsrc;
> + union perf_mem_data_src dsrc_l;
> + union perf_mem_data_src dsrc_r;
> +
> + if (left->mem_info)
> + dsrc_l = left->mem_info->dsrc;
> + else
> + dsrc_l.mem_dtlb = PERF_MEM_TLB_NA;
> +
> + if (right->mem_info)
> + dsrc_r = right->mem_info->dsrc;
> + else
> + dsrc_r.mem_dtlb = PERF_MEM_TLB_NA;
>
> return (int64_t)(dsrc_r.mem_dtlb - dsrc_l.mem_dtlb);
> }
> @@ -548,11 +594,14 @@ static int hist_entry__tlb_snprintf(struct hist_entry *self, char *bf,
> char out[64];
> size_t sz = sizeof(out) - 1; /* -1 for null termination */
> size_t l = 0, i;
> - u64 m = self->mem_info->dsrc.mem_dtlb;
> + u64 m = PERF_MEM_TLB_NA;
> u64 hit, miss;
>
> out[0] = '\0';
>
> + if (self->mem_info)
> + m = self->mem_info->dsrc.mem_dtlb;
> +
> hit = m & PERF_MEM_TLB_HIT;
> miss = m & PERF_MEM_TLB_MISS;
>
> @@ -569,6 +618,8 @@ static int hist_entry__tlb_snprintf(struct hist_entry *self, char *bf,
> strncat(out, tlb_access[i], sz - l);
> l += strlen(tlb_access[i]);
> }
> + if (*out == '\0')
> + strcpy(out, "N/A");
> if (hit)
> strncat(out, " hit", sz - l);
> if (miss)
> @@ -580,8 +631,18 @@ static int hist_entry__tlb_snprintf(struct hist_entry *self, char *bf,
> static int64_t
> sort__lvl_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - union perf_mem_data_src dsrc_l = left->mem_info->dsrc;
> - union perf_mem_data_src dsrc_r = right->mem_info->dsrc;
> + union perf_mem_data_src dsrc_l;
> + union perf_mem_data_src dsrc_r;
> +
> + if (left->mem_info)
> + dsrc_l = left->mem_info->dsrc;
> + else
> + dsrc_l.mem_lvl = PERF_MEM_LVL_NA;
> +
> + if (right->mem_info)
> + dsrc_r = right->mem_info->dsrc;
> + else
> + dsrc_r.mem_lvl = PERF_MEM_LVL_NA;
>
> return (int64_t)(dsrc_r.mem_lvl - dsrc_l.mem_lvl);
> }
> @@ -610,9 +671,12 @@ static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
> char out[64];
> size_t sz = sizeof(out) - 1; /* -1 for null termination */
> size_t i, l = 0;
> - u64 m = self->mem_info->dsrc.mem_lvl;
> + u64 m = PERF_MEM_LVL_NA;
> u64 hit, miss;
>
> + if (self->mem_info)
> + m = self->mem_info->dsrc.mem_lvl;
> +
> out[0] = '\0';
>
> hit = m & PERF_MEM_LVL_HIT;
> @@ -631,6 +695,8 @@ static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
> strncat(out, mem_lvl[i], sz - l);
> l += strlen(mem_lvl[i]);
> }
> + if (*out == '\0')
> + strcpy(out, "N/A");
> if (hit)
> strncat(out, " hit", sz - l);
> if (miss)
> @@ -642,8 +708,18 @@ static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
> static int64_t
> sort__snoop_cmp(struct hist_entry *left, struct hist_entry *right)
> {
> - union perf_mem_data_src dsrc_l = left->mem_info->dsrc;
> - union perf_mem_data_src dsrc_r = right->mem_info->dsrc;
> + union perf_mem_data_src dsrc_l;
> + union perf_mem_data_src dsrc_r;
> +
> + if (left->mem_info)
> + dsrc_l = left->mem_info->dsrc;
> + else
> + dsrc_l.mem_snoop = PERF_MEM_SNOOP_NA;
> +
> + if (right->mem_info)
> + dsrc_r = right->mem_info->dsrc;
> + else
> + dsrc_r.mem_snoop = PERF_MEM_SNOOP_NA;
>
> return (int64_t)(dsrc_r.mem_snoop - dsrc_l.mem_snoop);
> }
> @@ -663,10 +739,13 @@ static int hist_entry__snoop_snprintf(struct hist_entry *self, char *bf,
> char out[64];
> size_t sz = sizeof(out) - 1; /* -1 for null termination */
> size_t i, l = 0;
> - u64 m = self->mem_info->dsrc.mem_snoop;
> + u64 m = PERF_MEM_SNOOP_NA;
>
> out[0] = '\0';
>
> + if (self->mem_info)
> + m = self->mem_info->dsrc.mem_snoop;
> +
> for (i = 0; m && i < NUM_SNOOP_ACCESS; i++, m >>= 1) {
> if (!(m & 0x1))
> continue;
> @@ -678,6 +757,9 @@ static int hist_entry__snoop_snprintf(struct hist_entry *self, char *bf,
> l += strlen(snoop_access[i]);
> }
>
> + if (*out == '\0')
> + strcpy(out, "N/A");
> +
> return repsep_snprintf(bf, size, "%-*s", width, out);
> }
>
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In reply to: Stephane Eranian: "[PATCH] perf report: fix handling of memory sampling sort orders"
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