Add DSO size to perf report/top sort output list.

This includes adding a map__size fn to map.h, which is
approximately equal to the DSO data file_size:

DSO                             file size       map (end-start) file / 
(end-start)
libwebkit2gtk-4.0.so.37.24.9    43260072        41295872        95%
libglib-2.0.so.0.5400.1          1125680         1118208        99%
libc-2.26.so                     1960656         1925120        101%
libdbus-1.so.3.14.13              309456          303104        102%

Sample output:

$ ./perf report -s dso_size,dso
Samples: 2K of event 'cycles:uppp', Event count (approx.): 128373340
Overhead  DSO size  Shared Object
  90.62%   unknown  [unknown]
   2.87%   1118208  libglib-2.0.so.0.5400.1
   1.92%    303104  libdbus-1.so.3.14.13
   1.42%   1925120  libc-2.26.so
   0.77%  41295872  libwebkit2gtk-4.0.so.37.24.9
   0.61%    335872  libgobject-2.0.so.0.5400.1
   0.41%   1052672  libgdk-3.so.0.2200.25
   0.36%    106496  libpthread-2.26.so
   0.29%    221184  dbus-daemon
   0.17%    159744  ld-2.26.so
   0.13%     49152  libwayland-client.so.0.3.0
   0.12%   1642496  libgio-2.0.so.0.5400.1
   0.09%   7327744  libgtk-3.so.0.2200.25
   0.09%  12324864  libmozjs-52.so.0.0.0
   0.05%   4796416  perf
   0.04%    843776  libgjs.so.0.0.0
   0.03%   1409024  libmutter-clutter-1.so

Cc: Maxim Kuvyrkov <[email protected]>
Signed-off-by: Kim Phillips <[email protected]>
---
 tools/perf/Documentation/perf-report.txt |  1 +
 tools/perf/util/hist.h                   |  1 +
 tools/perf/util/map.h                    |  4 ++++
 tools/perf/util/sort.c                   | 41 ++++++++++++++++++++++++++++++++
 tools/perf/util/sort.h                   |  1 +
 5 files changed, 48 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt 
b/tools/perf/Documentation/perf-report.txt
index e1a660e60849..917e36fde6d8 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -80,6 +80,7 @@ OPTIONS
        - comm: command (name) of the task which can be read via 
/proc/<pid>/comm
        - pid: command and tid of the task
        - dso: name of library or module executed at the time of sample
+       - dso_size: size of library or module executed at the time of sample
        - symbol: name of function executed at the time of sample
        - symbol_size: size of function executed at the time of sample
        - parent: name of function matched to the parent regex filter. Unmatched
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index e869cad4d89f..32fbf26e0c18 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -61,6 +61,7 @@ enum hist_column {
        HISTC_SRCLINE_TO,
        HISTC_TRACE,
        HISTC_SYM_SIZE,
+       HISTC_DSO_SIZE,
        HISTC_NR_COLS, /* Last entry */
 };
 
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index edeb7291c8e1..0e9bbe01b0ab 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -103,6 +103,10 @@ static inline u64 identity__map_ip(struct map *map 
__maybe_unused, u64 ip)
        return ip;
 }
 
+static inline size_t map__size(const struct map *map)
+{
+       return map->end - map->start;
+}
 
 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
 u64 map__rip_2objdump(struct map *map, u64 rip);
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index e8514f651865..26a68dfd8a4f 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1545,6 +1545,46 @@ struct sort_entry sort_sym_size = {
        .se_width_idx   = HISTC_SYM_SIZE,
 };
 
+/* --sort dso_size */
+
+static int64_t _sort__dso_size_cmp(struct map *map_l, struct map *map_r)
+{
+       int64_t size_l = map_l != NULL ? map__size(map_l) : 0;
+       int64_t size_r = map_r != NULL ? map__size(map_r) : 0;
+
+       return size_l < size_r ? -1 :
+               size_l == size_r ? 0 : 1;
+}
+
+static int64_t
+sort__dso_size_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+       return _sort__dso_size_cmp(right->ms.map, left->ms.map);
+}
+
+static int _hist_entry__dso_size_snprintf(struct map *map, char *bf,
+                                         size_t bf_size, unsigned int width)
+{
+       if (map && map->dso)
+               return repsep_snprintf(bf, bf_size, "%*d", width,
+                                      map__size(map));
+
+       return repsep_snprintf(bf, bf_size, "%*s", width, "unknown");
+}
+
+static int hist_entry__dso_size_snprintf(struct hist_entry *he, char *bf,
+                                        size_t size, unsigned int width)
+{
+       return _hist_entry__dso_size_snprintf(he->ms.map, bf, size, width);
+}
+
+struct sort_entry sort_dso_size = {
+       .se_header      = "DSO size",
+       .se_cmp         = sort__dso_size_cmp,
+       .se_snprintf    = hist_entry__dso_size_snprintf,
+       .se_width_idx   = HISTC_DSO_SIZE,
+};
+
 
 struct sort_dimension {
        const char              *name;
@@ -1569,6 +1609,7 @@ static struct sort_dimension common_sort_dimensions[] = {
        DIM(SORT_TRANSACTION, "transaction", sort_transaction),
        DIM(SORT_TRACE, "trace", sort_trace),
        DIM(SORT_SYM_SIZE, "symbol_size", sort_sym_size),
+       DIM(SORT_DSO_SIZE, "dso_size", sort_dso_size),
        DIM(SORT_CGROUP_ID, "cgroup_id", sort_cgroup_id),
 };
 
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index f5901c10a563..035b62e2c60b 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -220,6 +220,7 @@ enum sort_type {
        SORT_TRANSACTION,
        SORT_TRACE,
        SORT_SYM_SIZE,
+       SORT_DSO_SIZE,
        SORT_CGROUP_ID,
 
        /* branch stack specific sort keys */
-- 
2.16.2

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