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perf env: Add perf_env__numa_node()

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[ Upstream commit 389799a7a1e86c55f38897e679762efadcc9dedd ]

To speed up cpu to node lookup, add perf_env__numa_node(), that creates
cpu array on the first lookup, that holds numa nodes for each stored
cpu.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kan Liang <kan.liang@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://lkml.kernel.org/r/20190904073415.723-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Stable-dep-of: 9c51f8788b5d ("perf env: Avoid recursively taking env->bpf_progs.lock")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiri Olsa 2019-08-29 13:31:48 +02:00 committed by Greg Kroah-Hartman
parent 9638beb4e1
commit 14a9769a76
2 changed files with 46 additions and 0 deletions
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40
tools/perf/util/env.c
View File

@ -183,6 +183,7 @@ void perf_env__exit(struct perf_env *env)
zfree(&env->sibling_threads);
zfree(&env->pmu_mappings);
zfree(&env->cpu);
zfree(&env->numa_map);
for (i = 0; i < env->nr_numa_nodes; i++)
perf_cpu_map__put(env->numa_nodes[i].map);
@ -342,3 +343,42 @@ const char *perf_env__arch(struct perf_env *env)
return normalize_arch(arch_name);
}
int perf_env__numa_node(struct perf_env *env, int cpu)
{
if (!env->nr_numa_map) {
struct numa_node *nn;
int i, nr = 0;
for (i = 0; i < env->nr_numa_nodes; i++) {
nn = &env->numa_nodes[i];
nr = max(nr, perf_cpu_map__max(nn->map));
}
nr++;
/*
* We initialize the numa_map array to prepare
* it for missing cpus, which return node -1
*/
env->numa_map = malloc(nr * sizeof(int));
if (!env->numa_map)
return -1;
for (i = 0; i < nr; i++)
env->numa_map[i] = -1;
env->nr_numa_map = nr;
for (i = 0; i < env->nr_numa_nodes; i++) {
int tmp, j;
nn = &env->numa_nodes[i];
perf_cpu_map__for_each_cpu(j, tmp, nn->map)
env->numa_map[j] = i;
}
}
return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;
}

6
tools/perf/util/env.h
View File

@ -87,6 +87,10 @@ struct perf_env {
struct rb_root btfs;
u32 btfs_cnt;
} bpf_progs;
/* For fast cpu to numa node lookup via perf_env__numa_node */
int *numa_map;
int nr_numa_map;
};
enum perf_compress_type {
@ -119,4 +123,6 @@ struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
__u32 prog_id);
bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node);
struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id);
int perf_env__numa_node(struct perf_env *env, int cpu);
#endif /* __PERF_ENV_H */