• Jin Yao's avatar
    perf report: Make --branch-history work without callgraphs(-g) option in perf record · b49a821e
    Jin Yao authored
      perf record -b -g <command>
      perf report --branch-history
    
    This merges the LBRs with the callgraphs.
    
    However it would be nice if it also works without callgraphs (-g) set in
    perf record, so that only the LBRs are displayed.  But currently perf
    report errors in this case. For example,
    
      perf record -b <command>
      perf report --branch-history
    
      Error:
      Selected -g or --branch-history but no callchain data. Did
      you call 'perf record' without -g?
    
    This patch displays the LBRs only even if callgraphs(-g) is not enabled
    in perf record.
    
    Change log:
    
    v2: According to Milian Wolff's comment, change the obsolete error
    message. Now the error message is:
    
                     ┌─Error:─────────────────────────────────────┐
                     │Selected -g or --branch-history.            │
                     │But no callchain or branch data.            │
                     │Did you call 'perf record' without -g or -b?│
                     │                                            │
                     │                                            │
                     │Press any key...                            │
                     └────────────────────────────────────────────┘
    
    When passing the last parameter to hists__fprintf,
    changes "|" to "||".
    
      hists__fprintf(hists, !quiet, 0, 0, rep->min_percent, stdout,
                     symbol_conf.use_callchain || symbol_conf.show_branchflag_count);
    Signed-off-by: default avatarYao Jin <yao.jin@linux.intel.com>
    Reviewed-by: default avatarAndi Kleen <ak@linux.intel.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Kan Liang <kan.liang@intel.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lkml.kernel.org/r/1494240182-28899-1-git-send-email-yao.jin@linux.intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    b49a821e
hist.c 59.2 KB