diff options
| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-17 15:03:05 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-17 16:03:34 -0300 |
| commit | 9ac94e31ca8c6311ec9eb68aea513e39ad809013 (patch) | |
| tree | 352e30a3305522b1744c6c333ae497e119b9fac8 /tools/perf/util/sort.c | |
| parent | tools include compiler-gcc: Add __pure attribute helper (diff) | |
| download | linux-dev-9ac94e31ca8c6311ec9eb68aea513e39ad809013.tar.xz linux-dev-9ac94e31ca8c6311ec9eb68aea513e39ad809013.zip | |
perf tools: Read the cache line size lazily
It is not read as commonly as 'page_size', so it makes sense to read it
lazily, caching its value when it is first read.
Less files open unconditionally at startup.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-35xhrq91u94uc1djtclek1ie@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/sort.c')
| -rw-r--r-- | tools/perf/util/sort.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index e65903a695a6..4058ade352a5 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -2582,7 +2582,7 @@ int sort_dimension__add(struct perf_hpp_list *list, const char *tok, if (sort__mode != SORT_MODE__MEMORY) return -EINVAL; - if (sd->entry == &sort_mem_dcacheline && cacheline_size == 0) + if (sd->entry == &sort_mem_dcacheline && cacheline_size() == 0) return -EINVAL; if (sd->entry == &sort_mem_daddr_sym) @@ -2628,7 +2628,7 @@ static int setup_sort_list(struct perf_hpp_list *list, char *str, if (*tok) { ret = sort_dimension__add(list, tok, evlist, level); if (ret == -EINVAL) { - if (!cacheline_size && !strncasecmp(tok, "dcacheline", strlen(tok))) + if (!cacheline_size() && !strncasecmp(tok, "dcacheline", strlen(tok))) pr_err("The \"dcacheline\" --sort key needs to know the cacheline size and it couldn't be determined on this system"); else pr_err("Invalid --sort key: `%s'", tok); |