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perf env: Introduce read_cpu_topology_map() method
Out of the code to write the cpu topology map in the perf.data file header. Now if one needs the CPU topology map for the running machine, one needs to call perf_env__read_cpu_topology_map(perf_env) and the info will be stored in perf_env.cpu. For now we're using a global perf_env variable, that will have its contents freed after we run a builtin. v2: Check perf_env__read_cpu_topology_map() return in write_cpu_topology() (Kan Liang) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1441828225-667-5-git-send-email-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
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