Strange reports of perf events on powerpc 83xx

[leroy christophe]

Hi,

Has anybody already used 'perf' tool on powerpc MPC83xx ?

I have been succesfully using perf on MPC8xx, but on MPC83xx I get 
something strange.

perf record/report reports addresses on user stack, as if it was mixing 
up D accesses and I accesses.

Any idea of what the problem can be ?

# Samples: 8K of event 'cpu-clock'
# Event count (approx.): 2196000000
#
# Overhead  Command       Shared Object       Symbol
# ........  ............  .................. 
............................................
#
     2.62%  perf_reseau4  libpthread-2.18.so  [.] __libc_send
     2.56%  perf_reseau4  [kernel.kallsyms]   [k] __ip_make_skb
     1.62%  perf_reseau4  [kernel.kallsyms]   [k] __ip_append_data.isra.39
     1.55%  perf_reseau4  [kernel.kallsyms]   [k] ip_finish_output
     1.33%  perf_reseau4  [unknown]           [k] 0x7ffffd94
     1.33%  perf_reseau4  [unknown]           [k] 0x7ffffd95
     1.28%  perf_reseau4  [unknown]           [k] 0x7ffffd97
     1.26%  perf_reseau4  [unknown]           [k] 0x7ffffda3
     1.24%  perf_reseau4  [unknown]           [k] 0x7ffffd98
     1.22%  perf_reseau4  [unknown]           [k] 0x7ffffd92
     1.22%  perf_reseau4  [unknown]           [k] 0x7ffffd9b
     1.22%  perf_reseau4  [unknown]           [k] 0x7ffffdaa
     1.21%  perf_reseau4  [unknown]           [k] 0x7ffffd96
     1.18%  perf_reseau4  [unknown]           [k] 0x7ffffda7
     1.17%  perf_reseau4  [unknown]           [k] 0x7ffffd8d
     1.17%  perf_reseau4  [unknown]           [k] 0x7ffffd99
     1.13%  perf_reseau4  [unknown]           [k] 0x7ffffd90
     1.13%  perf_reseau4  [unknown]           [k] 0x7ffffda2
     1.12%  perf_reseau4  [kernel.kallsyms]   [k] __local_bh_enable_ip
     1.12%  perf_reseau4  [unknown]           [k] 0x7ffffd9c
     1.12%  perf_reseau4  [unknown]           [k] 0x7ffffd9e
     1.10%  perf_reseau4  [unknown]           [k] 0x7ffffda0
     1.08%  perf_reseau4  [unknown]           [k] 0x7ffffd9f
     1.08%  perf_reseau4  [unknown]           [k] 0x7ffffda6
     1.05%  perf_reseau4  [unknown]           [k] 0x7ffffda8
     1.02%  perf_reseau4  [unknown]           [k] 0x7ffffd9a
     1.01%  perf_reseau4  [unknown]           [k] 0x7ffffdb0
     1.00%  perf_reseau4  [unknown]           [k] 0x7ffffd89
     1.00%  perf_reseau4  [unknown]           [k] 0x7ffffd8b
     1.00%  perf_reseau4  [unknown]           [k] 0x7ffffdac


Christophe
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