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https://github.com/edk2-porting/linux-next.git
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7780c25bae
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>
85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
#ifndef __PERF_CPUMAP_H
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#define __PERF_CPUMAP_H
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#include <stdio.h>
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#include <stdbool.h>
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#include "perf.h"
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#include "util/debug.h"
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struct cpu_map {
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int nr;
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int map[];
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};
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struct cpu_map *cpu_map__new(const char *cpu_list);
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struct cpu_map *cpu_map__dummy_new(void);
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void cpu_map__delete(struct cpu_map *map);
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struct cpu_map *cpu_map__read(FILE *file);
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size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
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int cpu_map__get_socket(struct cpu_map *map, int idx);
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int cpu_map__get_core(struct cpu_map *map, int idx);
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int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp);
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int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep);
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static inline int cpu_map__socket(struct cpu_map *sock, int s)
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{
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if (!sock || s > sock->nr || s < 0)
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return 0;
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return sock->map[s];
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}
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static inline int cpu_map__id_to_socket(int id)
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{
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return id >> 16;
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}
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static inline int cpu_map__id_to_cpu(int id)
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{
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return id & 0xffff;
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}
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static inline int cpu_map__nr(const struct cpu_map *map)
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{
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return map ? map->nr : 1;
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}
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static inline bool cpu_map__empty(const struct cpu_map *map)
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{
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return map ? map->map[0] == -1 : true;
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}
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int max_cpu_num;
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int max_node_num;
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int *cpunode_map;
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int cpu__setup_cpunode_map(void);
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static inline int cpu__max_node(void)
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{
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if (unlikely(!max_node_num))
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pr_debug("cpu_map not initialized\n");
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return max_node_num;
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}
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static inline int cpu__max_cpu(void)
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{
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if (unlikely(!max_cpu_num))
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pr_debug("cpu_map not initialized\n");
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return max_cpu_num;
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}
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static inline int cpu__get_node(int cpu)
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{
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if (unlikely(cpunode_map == NULL)) {
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pr_debug("cpu_map not initialized\n");
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return -1;
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}
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return cpunode_map[cpu];
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}
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#endif /* __PERF_CPUMAP_H */
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