Hello,

There is an issue related to perf which I am facing since 15 days. Hoping that the great minds here will help me to solve this.

I have a requirement to make perf tool work on a device having ARM architecture. But, on recording the tracepoint events and then running ./perf report, it shows the shared objects name as [unknown] and Symbols as 00000, whereas for software and hardware events I do not experience this issue.

I have cross compiled the perf tool available on mailine and ported it on a device having ARM architecture.

Output on ARM based device with kernel 3.4.

./perf record -e kmem:kmalloc cal

[ perf record: Woken up 1 times to write data ]

[ perf record: Captured and wrote 0.007 MB perf.data (~321 samples) ]

./perf report

Overhead Command Shared Object Symbol

........................... ................................ ...........................................

40.78% cal [unknown] [.]00000000

31.6% cal [unknown] [.]00000000

[...]

On ubuntu 12.04, system (kernel 3.10) it works perfectly fine.

Output on x86 architecture

./perf record -e kmem:kmalloc gcalctool

[ perf record: Woken up 3 times to write data ]

[ perf record: Captured and wrote 0.27 MB perf.data (~845 samples) ]

./perf report --stdio

Overhead Command Shared Object Symbol

........................... ................................ ...........................................

96.55% cal [kernel.kallsyms] [k] kmem_cache_alloc_trace

3.45% cal [kernel.kallsyms] [.]__kmalloc

[...]

Keenly, awaiting for you help.

Thanks.

Sneha.