• Jin Yao's avatar
    perf header: Support HYBRID_TOPOLOGY feature · f7d74ce3
    Jin Yao authored
    It is useful to let the user know about the hybrid topology.
    
    Add the HYBRID_TOPOLOGY feature in header to indicate the core CPUs
    and the atom CPUs.
    
    With this patch a perf.data generated on a hybrid platform reports
    the hybrid CPU list:
    
      root@otcpl-adl-s-2:~# perf report --header-only -I
      ...
      # hybrid cpu system:
      # cpu_core cpu list : 0-15
      # cpu_atom cpu list : 16-23
    
    For a perf.data generated on a non-hybrid platform, reports a message
    that HYBRID_TOPOLOGY is missing:
    
      root@kbl-ppc:~# perf report --header-only -I
      ...
      # missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGY
    Signed-off-by: default avatarJin Yao <yao.jin@linux.intel.com>
    Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Jin Yao <yao.jin@intel.com>
    Cc: Kan Liang <kan.liang@linux.intel.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lore.kernel.org/lkml/20210514122948.9472-2-yao.jin@linux.intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    f7d74ce3
cputopo.c 7.39 KB