Not getting much in the way of linux perf data...

perf_session.txt

spacey@spacey-vm:~$ sudo perf record -F 99 -p 1531 -g -- sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.156 MB perf.data (~6825 samples) ]
spacey@spacey-vm:~$ sudo perf report -n perf.data --stdio
Failed to open /tmp/perf-1531.map, continuing without symbols
# To display the perf.data header info, please use --header/--header-only option
#
# Samples: 58  of event 'cpu-clock'
# Event count (approx.): 585858580
#
# Children      Self       Samples  Command  Shared Object  Symbol
# ........  ........  ............  .......  .............  ......
#


spacey@spacey-vm:~$ ls -1rt | tail -1
perf.data
spacey@spacey-vm:~$ ps -ef | grep 1531
spacey    1531  1304 14 09:21 ?        00:10:32 compiz
spacey    6232  1875  0 10:35 pts/1    00:00:00 grep --color=auto 1531