[acme@seventh perf]$ rm -rf my_symfs/
[acme@seventh perf]$ perf record ls foo*
ls: cannot access 'foo*': No such file or directory
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.002 MB perf.data (8 samples) ]
[acme@seventh perf]$ perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 8  of event 'cycles:u'
# Event count (approx.): 741044
#
# Overhead  Command  Shared Object         Symbol                   
# ........  .......  ....................  .........................
#
    66.57%  ls       ld-linux-x86-64.so.2  [.] _dl_lookup_symbol_x
    25.74%  ls       ld-linux-x86-64.so.2  [.] _dl_next_ld_env_entry
     7.69%  ls       [unknown]             [k] 0xffffffffa7e01047


#
# (Tip: For memory address profiling, try: perf mem record / perf mem report)
#
[acme@seventh perf]$ perf report -v --stdio
build id event received for [kernel.kallsyms]: 731aab296cbe38ea3f310e9d52c8879ac6adb1a4 [20]
build id event received for /usr/lib64/ld-linux-x86-64.so.2: f526ee004c4dbdc3528e4997dfa2f9cd13c192c7 [20]
build id event received for [vdso]: d598ba80ef8e74ba62a4dda34dcddf6afc0e3ee8 [20]
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 8  of event 'cycles:u'
# Event count (approx.): 741044
#
# Overhead  Command  Shared Object                    Symbol                                        
# ........  .......  ...............................  ..............................................
#
    66.57%  ls       /usr/lib64/ld-linux-x86-64.so.2  0xb6cf             B [.] _dl_lookup_symbol_x
    25.74%  ls       /usr/lib64/ld-linux-x86-64.so.2  0x1d7c0            B [.] _dl_next_ld_env_entry
     7.69%  ls       [unknown]                        0xffffffffa7e01047 ! [k] 0xffffffffa7e01047


#
# (Tip: If you have debuginfo enabled, try: perf report -s sym,srcline)
#
[acme@seventh perf]$ mkdir my_symfs
[acme@seventh perf]$ perf report --stdio --symfs my_symfs
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 8  of event 'cycles:u'
# Event count (approx.): 741044
#
# Overhead  Command  Shared Object         Symbol                
# ........  .......  ....................  ......................
#
    66.57%  ls       ld-linux-x86-64.so.2  [.] 0x000000000000b6cf
    25.74%  ls       ld-linux-x86-64.so.2  [.] 0x000000000001d7c0
     7.69%  ls       [unknown]             [k] 0xffffffffa7e01047


#
# (Tip: To see list of saved events and attributes: perf evlist -v)
#
[acme@seventh perf]$ mkdir -p my_symfs/usr/lib64
[acme@seventh perf]$ cp /usr/lib64/ld-linux-x86-64.so.2 my_symfs/usr/lib64/
[acme@seventh perf]$ perf report --stdio --symfs my_symfs
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 8  of event 'cycles:u'
# Event count (approx.): 741044
#
# Overhead  Command  Shared Object         Symbol                   
# ........  .......  ....................  .........................
#
    66.57%  ls       ld-linux-x86-64.so.2  [.] _dl_lookup_symbol_x
    25.74%  ls       ld-linux-x86-64.so.2  [.] _dl_next_ld_env_entry
     7.69%  ls       [unknown]             [k] 0xffffffffa7e01047


#
# (Tip: Profiling branch (mis)predictions with: perf record -b / perf report)
#
[acme@seventh perf]$