• Arnaldo Carvalho de Melo's avatar
    perf report: Adjust column width to the values sampled · 52d422de
    Arnaldo Carvalho de Melo authored
    Auto-adjust column width of perf report output to the
    longest occuring string length.
    
    Example:
    
    [acme@doppio pahole]$  perf report --sort comm,dso,symbol | head -13
    
        12.79%   pahole  /usr/lib64/libdw-0.141.so    [.] __libdw_find_attr
         8.90%   pahole  /lib64/libc-2.10.1.so        [.] _int_malloc
         8.68%   pahole  /usr/lib64/libdw-0.141.so    [.] __libdw_form_val_len
         8.15%   pahole  /lib64/libc-2.10.1.so        [.] __GI_strcmp
         6.80%   pahole  /lib64/libc-2.10.1.so        [.] __tsearch
         5.54%   pahole  ./build/libdwarves.so.1.0.0  [.] tag__recode_dwarf_type
    [acme@doppio pahole]$
    
    [acme@doppio pahole]$  perf report --sort comm,dso,symbol -d /lib64/libc-2.10.1.so | head -10
    
        21.92%   pahole  /lib64/libc-2.10.1.so  [.] _int_malloc
        20.08%   pahole  /lib64/libc-2.10.1.so  [.] __GI_strcmp
        16.75%   pahole  /lib64/libc-2.10.1.so  [.] __tsearch
    [acme@doppio pahole]$
    
    Also add these extra options to control the new behaviour:
    
      -w, --field-width
    
    Force each column width to the provided list, for large terminal
    readability.
    
      -t, --field-separator:
    
    Use a special separator character and don't pad with spaces, replacing
    all occurances of this separator in symbol names (and other output) with
    a '.' character, that thus it's the only non valid separator.
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Paul Mackerras <paulus@samba.org>
    LKML-Reference: <20090711014728.GH3452@ghostprotocols.net>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    52d422de
symbol.c 16.8 KB