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] [.]0000000031.6%
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_trace3.45% cal
[kernel.kallsyms] [.]__kmalloc
[...]
Keenly, awaiting for you help.
Thanks.
Sneha.
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