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perf tools: Add support to dynamically get cacheline size

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Different arches may have different cacheline sizes.  Look it up and set
a global variable for reference.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1401480605-97442-1-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Don Zickus 2014-05-30 16:10:05 -04:00 committed by Jiri Olsa
parent 7365be55ee
commit 2b1b71003e
3 changed files with 3 additions and 0 deletions
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1
tools/perf/perf.c
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@ -458,6 +458,7 @@ int main(int argc, const char **argv)
/* The page_size is placed in util object. */
page_size = sysconf(_SC_PAGE_SIZE);
cacheline_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
cmd = perf_extract_argv0_path(argv[0]);
if (!cmd)

1
tools/perf/util/util.c
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@ -17,6 +17,7 @@
* XXX We need to find a better place for these things...
*/
unsigned int page_size;
int cacheline_size;
bool test_attr__enabled;

1
tools/perf/util/util.h
View file

@ -304,6 +304,7 @@ char *rtrim(char *s);
void dump_stack(void);
extern unsigned int page_size;
extern int cacheline_size;
void get_term_dimensions(struct winsize *ws);