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author | Don Zickus <dzickus@redhat.com> | 2014-04-07 14:55:21 -0400 |
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committer | Jiri Olsa <jolsa@redhat.com> | 2014-04-22 17:39:12 +0200 |
commit | 7780c25bae59fd042281710f5e1243268e2c18dc (patch) | |
tree | d829ae6b0a4f48152326e79c0927f52f23e4a660 /tools/perf/util/cpumap.h | |
parent | 7c2f8164e5415ef48954f6929f4acae5764afdb4 (diff) | |
download | linux-7780c25bae59fd042281710f5e1243268e2c18dc.tar.bz2 |
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>
Diffstat (limited to 'tools/perf/util/cpumap.h')
-rw-r--r-- | tools/perf/util/cpumap.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h index b123bb9d6f55..61a654849002 100644 --- a/tools/perf/util/cpumap.h +++ b/tools/perf/util/cpumap.h @@ -4,6 +4,9 @@ #include <stdio.h> #include <stdbool.h> +#include "perf.h" +#include "util/debug.h" + struct cpu_map { int nr; int map[]; @@ -46,4 +49,36 @@ 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 */ |