linux/tools/perf/util/cpumap.h
Don Zickus 7780c25bae perf tools: Allow ability to map cpus to nodes easily
This patch figures out the max number of cpus and nodes that are on the
system and creates a map of cpu to node.  This allows us to provide a cpu
and quickly get the node associated with it.

It was mostly copied from builtin-kmem.c and tweaked slightly to use less memory
(use possible cpus instead of max).  It also calculates the max number of nodes.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1396896924-129847-2-git-send-email-dzickus@redhat.com
[ Removing out label code in init_cpunode_map ]
[ Adding check for snprintf error ]
[ Removing unneeded returns ]
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
2014-04-22 17:39:12 +02:00

85 lines
1.7 KiB
C

#ifndef __PERF_CPUMAP_H
#define __PERF_CPUMAP_H
#include <stdio.h>
#include <stdbool.h>
#include "perf.h"
#include "util/debug.h"
struct cpu_map {
int nr;
int map[];
};
struct cpu_map *cpu_map__new(const char *cpu_list);
struct cpu_map *cpu_map__dummy_new(void);
void cpu_map__delete(struct cpu_map *map);
struct cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
int cpu_map__get_socket(struct cpu_map *map, int idx);
int cpu_map__get_core(struct cpu_map *map, int idx);
int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp);
int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep);
static inline int cpu_map__socket(struct cpu_map *sock, int s)
{
if (!sock || s > sock->nr || s < 0)
return 0;
return sock->map[s];
}
static inline int cpu_map__id_to_socket(int id)
{
return id >> 16;
}
static inline int cpu_map__id_to_cpu(int id)
{
return id & 0xffff;
}
static inline int cpu_map__nr(const struct cpu_map *map)
{
return map ? map->nr : 1;
}
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];
}
#endif /* __PERF_CPUMAP_H */