• Arnaldo Carvalho de Melo's avatar
    perf annotate browser: Hide non jump target addresses in offset mode · b793a401
    Arnaldo Carvalho de Melo authored
    This:
    
        0.00 :         ffffffff8116bd00:       lock btsl $0x0,(%r12)
      100.00 :         ffffffff8116bd07:       sbb    %eax,%eax
        0.00 :         ffffffff8116bd09:       test   %eax,%eax
        0.00 :         ffffffff8116bd0b:       jne    ffffffff8116bf5f <__mem_cgroup_commit_charge+0x28f>
        0.00 :         ffffffff8116bd11:       mov    (%r12),%rax
        0.00 :         ffffffff8116bd15:       test   $0x2,%al
        0.00 :         ffffffff8116bd17:       jne    ffffffff8116bf6e <__mem_cgroup_commit_charge+0x29e>
        0.00 :         ffffffff8116bd1d:       test   %r9b,%r9b
        0.00 :         ffffffff8116bd20:       jne    ffffffff8116be30 <__mem_cgroup_commit_charge+0x160>
        0.00 :         ffffffff8116bd26:       xor    %eax,%eax
        0.00 :         ffffffff8116bd28:       mov    %r13,0x8(%r12)
        0.00 :         ffffffff8116bd2d:       lock orb $0x2,(%r12)
        0.00 :         ffffffff8116bd33:       test   %r9b,%r9b
        0.00 :         ffffffff8116bd36:       je     ffffffff8116bdf3 <__mem_cgroup_commit_charge+0x123>
    
    Becomes:
    
        0.00 :         30:       lock btsl $0x0,(%r12)
      100.00 :                   sbb    %eax,%eax
        0.00 :                   test   %eax,%eax
        0.00 :                   jne    28f
        0.00 :                   mov    (%r12),%rax
        0.00 :                   test   $0x2,%al
        0.00 :                   jne    29e
        0.00 :                   test   %r9b,%r9b
        0.00 :                   jne    160
        0.00 :         56:       xor    %eax,%eax
        0.00 :         58:       mov    %r13,0x8(%r12)
        0.00 :                   lock orb $0x2,(%r12)
        0.00 :                   test   %r9b,%r9b
        0.00 :                   je     123
    
    I.e. We trow away all those useless addresses and keep just jump labels.
    Suggested-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Namhyung Kim <namhyung@gmail.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Stephane Eranian <eranian@google.com>
    Link: http://lkml.kernel.org/n/tip-r2vmbtgz0l8coluj8flztgrn@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    b793a401
annotate.c 17.4 KB