Em Mon, Jan 25, 2016 at 06:12:42PM -0300, Arnaldo Carvalho de Melo escreveu:

Em Mon, Jan 25, 2016 at 01:46:22PM -0700, Mathieu Poirier escreveu:

quoted

On 14 January 2016 at 14:46, Mathieu Poirier [off-list ref] wrote:

quoted

For memory allocation purposes, code located in other places
then util/cpumap.c may want to know how many CPUs the system has.

This patch is making function set_max_cpu_num() available to
other parts of the perf tool so that global variable
'max_cpu_num' gets the right value when referenced by cpu__max_cpu().

Cc: Peter Zijlstra <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 tools/perf/util/cpumap.c | 2 +-
 tools/perf/util/cpumap.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 10af1e7524fb..ae179320c0c0 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c

@@ -380,7 +380,7 @@ out:
 }

 /* Determine highest possible cpu in the system for sparse allocation */
-static void set_max_cpu_num(void)
+void set_max_cpu_num(void)
 {
        const char *mnt;
        char path[PATH_MAX];

diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 85f7772457fa..45fa963345eb 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h

@@ -14,6 +14,7 @@ struct cpu_map {
        int map[];
 };

+void set_max_cpu_num(void);
 struct cpu_map *cpu_map__new(const char *cpu_list);
 struct cpu_map *cpu_map__empty_new(int nr);
 struct cpu_map *cpu_map__dummy_new(void);
--

2.1.4

Arnaldo,

I can't queue this patch for 4.6 without at least a reviewed by from you.

This one I remember, looks ugly, the name set_max_cpu_num() looks
strange, when that was restricted (static) to that cpumap.c file, it
wasn't a problem, exporting it for wider usage looks bad.

You've been waiting for this for quite a while, it seems, lemme stop
what I am doing to check this...

So, please check the patch below, what you need then is just to use
cpu__max_cpu().

- Arnaldo

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index fa935093a599..9bcf2bed3a6d 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c

@@ -8,6 +8,10 @@
 #include <linux/bitmap.h>
 #include "asm/bug.h"
 
+static int max_cpu_num;
+static int max_node_num;
+static int *cpunode_map;
+
 static struct cpu_map *cpu_map__default_new(void)
 {
 	struct cpu_map *cpus;

@@ -486,6 +490,32 @@ out:
 		pr_err("Failed to read max nodes, using default of %d\n", max_node_num);
 }
 
+int cpu__max_node(void)
+{
+	if (unlikely(!max_node_num))
+		set_max_node_num();
+
+	return max_node_num;
+}
+
+int cpu__max_cpu(void)
+{
+	if (unlikely(!max_cpu_num))
+		set_max_cpu_num();
+
+	return max_cpu_num;
+}
+
+int cpu__get_node(int cpu)
+{
+	if (unlikely(cpunode_map == NULL)) {
+		pr_debug("cpu_map not initialized\n");
+		return -1;
+	}
+
+	return cpunode_map[cpu];
+}
+
 static int init_cpunode_map(void)
 {
 	int i;

diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 71c41b9efabb..81a2562aaa2b 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h

@@ -57,37 +57,11 @@ static inline bool cpu_map__empty(const struct cpu_map *map)
 	return map ? map->map[0] == -1 : true;
 }
 
-int max_cpu_num;
-int max_node_num;
-int *cpunode_map;
-
 int cpu__setup_cpunode_map(void);
 
-static inline int cpu__max_node(void)
-{
-	if (unlikely(!max_node_num))
-		pr_debug("cpu_map not initialized\n");
-
-	return max_node_num;
-}
-
-static inline int cpu__max_cpu(void)
-{
-	if (unlikely(!max_cpu_num))
-		pr_debug("cpu_map not initialized\n");
-
-	return max_cpu_num;
-}
-
-static inline int cpu__get_node(int cpu)
-{
-	if (unlikely(cpunode_map == NULL)) {
-		pr_debug("cpu_map not initialized\n");
-		return -1;
-	}
-
-	return cpunode_map[cpu];
-}
+int cpu__max_node(void);
+int cpu__max_cpu(void);
+int cpu__get_node(int cpu);
 
 int cpu_map__build_map(struct cpu_map *cpus, struct cpu_map **res,
 		       int (*f)(struct cpu_map *map, int cpu, void *data),