• F
    perf tools: Only display parent field if explictly sorted · cb1955b8
    Frederic Weisbecker 提交于
    We don't need to display the parent field if the parent
    sorting machinery is only used for parent filtering
    (as in "-p foo").
    
    However if parent filtering is used in combination with
    explicit parent sorting ( -s parent), we want to
    display it.
    
    Result with:
    
      perf report -p kernel_thread -s parent
    
    Before:
    
     # Overhead  Parent symbol
     # ........  .............
     #
         0.07%
                |
                --- ioread8
                    ata_sff_check_status
                    ata_sff_tf_load
                    ata_sff_qc_issue
                    ata_bmdma_qc_issue
                    ata_qc_issue
                    ata_scsi_translate
                    ata_scsi_queuecmd
                    scsi_dispatch_cmd
                    scsi_request_fn
                    __blk_run_queue
                    __make_request
                    generic_make_request
                    submit_bio
                    submit_bh
                    journal_submit_commit_record
                    jbd2_journal_commit_transaction
                    kjournald2
                    kthread
                    kernel_thread_helpe
    
    After:
    
     # Overhead  Parent symbol
     # ........  .............
     #
         0.07%  kernel_thread_helper
                |
                --- ioread8
                    ata_sff_check_status
                    ata_sff_tf_load
                    ata_sff_qc_issue
                    ata_bmdma_qc_issue
                    ata_qc_issue
                    ata_scsi_translate
                    ata_scsi_queuecmd
                    scsi_dispatch_cmd
                    scsi_request_fn
                    __blk_run_queue
                    __make_request
                    generic_make_request
                    submit_bio
                    submit_bh
                    journal_submit_commit_record
                    jbd2_journal_commit_transaction
                    kjournald2
                    kthread
                    kernel_thread_helper
    Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Sam Liao <phyomh@gmail.com>
    cb1955b8
builtin-report.c 15.0 KB