Messages in this thread | | | From | leroy christophe <> | Subject | Strange reports of perf events on powerpc 83xx | Date | Thu, 27 Aug 2015 15:58:59 +0200 |
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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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