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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-17 23:28:01 +0200 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-17 23:47:55 +0200 |
commit | 7031edac9dbc0f880c9fbaa40ca08b5de34239c6 (patch) | |
tree | 41c376c2a746d69ac2fa143d35bc95c3163ef8e2 /tools | |
parent | perf cpumap: Add reference count checking (diff) | |
download | linux-7031edac9dbc0f880c9fbaa40ca08b5de34239c6.tar.xz linux-7031edac9dbc0f880c9fbaa40ca08b5de34239c6.zip |
perf dso: Add dso__filename_with_chroot() to reduce number of accesses to dso->nsinfo members
We'll need to reference count dso->nsinfo, so reduce the number of
direct accesses by having a shorter form of obtaining a filename with
a chroot (namespace one).
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Link: https://lore.kernel.org/lkml/ZD26ZlqSbgSyH5lX@kernel.org
[ Used nsinfo__pid(dso->nsinfo), as it was already present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/builtin-inject.c | 4 | ||||
-rw-r--r-- | tools/perf/util/annotate.c | 3 | ||||
-rw-r--r-- | tools/perf/util/dso.c | 7 | ||||
-rw-r--r-- | tools/perf/util/dso.h | 2 | ||||
-rw-r--r-- | tools/perf/util/dsos.c | 3 | ||||
-rw-r--r-- | tools/perf/util/symbol.c | 3 |
6 files changed, 12 insertions, 10 deletions
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c index 76723ac314b6..61766eead4f4 100644 --- a/tools/perf/builtin-inject.c +++ b/tools/perf/builtin-inject.c @@ -630,10 +630,8 @@ static int dso__read_build_id(struct dso *dso) if (filename__read_build_id(dso->long_name, &dso->bid) > 0) dso->has_build_id = true; else if (dso->nsinfo) { - char *new_name; + char *new_name = dso__filename_with_chroot(dso, dso->long_name); - new_name = filename_with_chroot(dso->nsinfo->pid, - dso->long_name); if (new_name && filename__read_build_id(new_name, &dso->bid) > 0) dso->has_build_id = true; free(new_name); diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index e2693a1c28d5..ca9f0add68f4 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -1692,8 +1692,7 @@ fallback: mutex_lock(&dso->lock); if (access(filename, R_OK) && errno == ENOENT && dso->nsinfo) { - char *new_name = filename_with_chroot(dso->nsinfo->pid, - filename); + char *new_name = dso__filename_with_chroot(dso, filename); if (new_name) { strlcpy(filename, new_name, filename_size); free(new_name); diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index e36b418df2c6..a86614599269 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -491,6 +491,11 @@ static int do_open(char *name) return -1; } +char *dso__filename_with_chroot(const struct dso *dso, const char *filename) +{ + return filename_with_chroot(nsinfo__pid(dso->nsinfo), filename); +} + static int __open_dso(struct dso *dso, struct machine *machine) { int fd = -EINVAL; @@ -515,7 +520,7 @@ static int __open_dso(struct dso *dso, struct machine *machine) if (errno != ENOENT || dso->nsinfo == NULL) goto out; - new_name = filename_with_chroot(dso->nsinfo->pid, name); + new_name = dso__filename_with_chroot(dso, name); if (!new_name) goto out; diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 58d94175e714..0b7c7633b9f6 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -266,6 +266,8 @@ static inline bool dso__has_symbols(const struct dso *dso) return !RB_EMPTY_ROOT(&dso->symbols.rb_root); } +char *dso__filename_with_chroot(const struct dso *dso, const char *filename); + bool dso__sorted_by_name(const struct dso *dso); void dso__set_sorted_by_name(struct dso *dso); void dso__sort_by_name(struct dso *dso); diff --git a/tools/perf/util/dsos.c b/tools/perf/util/dsos.c index 2bd23e4cf19e..cf80aa42dd07 100644 --- a/tools/perf/util/dsos.c +++ b/tools/perf/util/dsos.c @@ -91,8 +91,7 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits) have_build_id = true; pos->has_build_id = true; } else if (errno == ENOENT && pos->nsinfo) { - char *new_name = filename_with_chroot(pos->nsinfo->pid, - pos->long_name); + char *new_name = dso__filename_with_chroot(pos, pos->long_name); if (new_name && filename__read_build_id(new_name, &pos->bid) > 0) { diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 91ebf93e0c20..e7f63670688e 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1963,8 +1963,7 @@ int dso__load(struct dso *dso, struct map *map) is_reg = is_regular_file(name); if (!is_reg && errno == ENOENT && dso->nsinfo) { - char *new_name = filename_with_chroot(dso->nsinfo->pid, - name); + char *new_name = dso__filename_with_chroot(dso, name); if (new_name) { is_reg = is_regular_file(new_name); strlcpy(name, new_name, PATH_MAX); |