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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-11-04 16:55:53 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-11-12 08:20:53 -0300 |
| commit | 7b018e298752b9bcaf34eba8e1d3c08e3207dfd8 (patch) | |
| tree | bf889f007612ff4b27e5d9f114dab8ba8e199ed2 /tools/perf/util/map.c | |
| parent | perf map: Combine maps__fixup_overlappings with its only use (diff) | |
| download | linux-dev-7b018e298752b9bcaf34eba8e1d3c08e3207dfd8.tar.xz linux-dev-7b018e298752b9bcaf34eba8e1d3c08e3207dfd8.zip | |
perf map: Remove ->groups from 'struct map'
With this 'struct map' uses a bit over 3 cachelines:
$ pahole -C map ~/bin/perf
<SNIP>
/* --- cacheline 2 boundary (128 bytes) --- */
u64 (*unmap_ip)(struct map *, u64); /* 128 8 */
struct dso * dso; /* 136 8 */
refcount_t refcnt; /* 144 4 */
/* size: 152, cachelines: 3, members: 18 */
/* sum members: 145, holes: 1, sum holes: 3 */
/* padding: 4 */
/* forced alignments: 2 */
/* last cacheline: 24 bytes */
} __attribute__((__aligned__(8)));
$
We probably can move map->map/unmap_ip() moved to 'struct map_groups',
that will shave more 16 bytes, getting this almost to two cachelines.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-ymlv3nzpofv2fugnjnizkrwy@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/map.c')
| -rw-r--r-- | tools/perf/util/map.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 27d8508f8a44..359846833a00 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -140,7 +140,6 @@ void map__init(struct map *map, u64 start, u64 end, u64 pgoff, struct dso *dso) map->map_ip = map__map_ip; map->unmap_ip = map__unmap_ip; RB_CLEAR_NODE(&map->rb_node); - map->groups = NULL; map->erange_warned = false; refcount_set(&map->refcnt, 1); } @@ -388,7 +387,6 @@ struct map *map__clone(struct map *from) refcount_set(&map->refcnt, 1); RB_CLEAR_NODE(&map->rb_node); dso__get(map->dso); - map->groups = NULL; } return map; @@ -582,7 +580,6 @@ void map_groups__init(struct map_groups *mg, struct machine *machine) void map_groups__insert(struct map_groups *mg, struct map *map) { maps__insert(&mg->maps, map); - map->groups = mg; } static void __maps__purge(struct maps *maps) @@ -749,7 +746,6 @@ static void __map_groups__insert(struct map_groups *mg, struct map *map) { __maps__insert(&mg->maps, map); __maps__insert_name(&mg->maps, map); - map->groups = mg; } int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE *fp) |