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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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7
tools/perf/perf.c
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@@ -12,6 +12,7 @@
#include "util/build-id.h"
#include "util/cache.h"
#include "util/env.h"
#include <internal/lib.h> // page_size
#include <subcmd/exec-cmd.h>
#include "util/config.h"
#include <subcmd/run-command.h>
@@ -20,11 +21,12 @@
#include "util/bpf-loader.h"
#include "util/debug.h"
#include "util/event.h"
#include "util/util.h" // page_size, usage()
#include "util/util.h" // usage()
#include "ui/ui.h"
#include "perf-sys.h"
#include <api/fs/fs.h>
#include <api/fs/tracing_path.h>
#include <perf/core.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
@@ -438,8 +440,7 @@ int main(int argc, const char **argv)
exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
pager_init(PERF_PAGER_ENVIRONMENT);
/* The page_size is placed in util object. */
page_size = sysconf(_SC_PAGE_SIZE);
libperf_init();
cmd = extract_argv0_path(argv[0]);
if (!cmd)