perf tools: Read the cache line size lazily
authorArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 17 May 2018 18:03:05 +0000 (15:03 -0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 17 May 2018 19:03:34 +0000 (16:03 -0300)
commit9ac94e31ca8c6311ec9eb68aea513e39ad809013
tree352e30a3305522b1744c6c333ae497e119b9fac8
parent6e1690c4c0b540930f08295b6a95c8660b257745
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>
tools/perf/perf.c
tools/perf/util/sort.c
tools/perf/util/sort.h
tools/perf/util/util.c
tools/perf/util/util.h