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libperf: Move 'page_size' global variable to libperf

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We need the 'page_size' variable in libperf, so move it there.

Add a libperf_init() as a global libperf init function to obtain this
value via sysconf() at tool start.

Committer notes:

Add internal/lib.h to tools/perf/ files using 'page_size', sometimes
replacing util.h with it if that was the only reason for having util.h
included.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-33-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-08-06 15:25:25 +02:00 • committed by Arnaldo Carvalho de Melo
parent d5a99483de
commit 20f2be1d48
28 changed files with 36 additions and 25 deletions
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3
tools/perf/util/util.c
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@ -3,6 +3,7 @@
#include "debug.h"
#include "event.h"
#include "namespaces.h"
#include <internal/lib.h>
#include <api/fs/fs.h>
#include <sys/mman.h>
#include <sys/stat.h>
@ -41,8 +42,6 @@ void perf_set_multithreaded(void)
perf_singlethreaded = false;
}
unsigned int page_size;
int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH;
int sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK;