Thanks Arnaldo,
Actually I am trying to profile coremark benchmark. So for a 32-bit coremark
application I use the commands as
$./perf record -e cycles ./cmark_32bit.exe
$./perf report > profling_coremark_32bit
This generates proper output as (Putting only top few lines).
# Samples: 486793933
#
# Overhead Command Shared Object Symbol
# ........ ............... ................... ......
#
40.65% cmark_32bit.exe cmark_32bit.exe [.] core_bench_state
29.21% cmark_32bit.exe cmark_32bit.exe [.] core_bench_list
21.97% cmark_32bit.exe cmark_32bit.exe [.] core_bench_matrix
3.69% cmark_32bit.exe cmark_32bit.exe [.] crc16
3.45% cmark_32bit.exe cmark_32bit.exe [.] crcu32
0.79% cmark_32bit.exe cmark_32bit.exe [.] crcu16
0.13% cmark_32bit.exe [kernel.kallsyms] [k] .raw_local_irq_restore
0.01% cmark_32bit.exe [kernel.kallsyms] [k] .memset
0.01% cmark_32bit.exe [kernel.kallsyms] [k] .rpc_set_active
0.01% cmark_32bit.exe cmark_32bit.exe [.] main
But when I repeat the procedure for a 64-bit application then there is some
problem. I am putting my steps and the results I see
$rm perf.data
$./perf record -e cycles ./cmark_64.exe
$./perf report > profling_coremark_64bit
# Samples: 570272263
#
# Overhead Command Shared Object Symbol
# ........ ............ ........................... ......
#
99.79% cmark_64.exe cmark_64.exe [.]
00000011.plt_call.putchar@@GLIBC_2.3+0
0.08% cmark_64.exe [kernel.kallsyms] [k]
.raw_local_irq_restore
0.01% cmark_64.exe [kernel.kallsyms] [k] .memset
0.01% cmark_64.exe [kernel.kallsyms] [k] .run_timer_softirq
0.01% cmark_64.exe [kernel.kallsyms] [k] .rpc_set_active
0.01% cmark_64.exe [kernel.kallsyms] [k]
.nfs_set_page_tag_locked
0.01% cmark_64.exe [kernel.kallsyms] [k] .kref_get
0.01% cmark_64.exe [kernel.kallsyms] [k] .__rpc_execute
Which is not correct.
Please let me know if you see some problem in my steps
Other details(uname -a)
Linux p5020ds-64b 2.6.34.6 #4 SMP Thu Jun 2 12:40:34 IST 2011 ppc64 GNU/Linux
I am using not using elfutils currently. I am using libelf-0.8.12/ from
http://www.mr511.de/software/.
>From your mail it looks like it should be a elfutils issue. So I will get
>elfutils today and build it.
Regards
Ranjit
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Arnaldo Carvalho
de Melo
Sent: Friday, June 03, 2011 9:06 PM
To: Kumar Ranjit-B04060
Cc: [email protected]
Subject: Re: Not able to profile a 64bit application
Em Fri, Jun 03, 2011 at 09:21:41AM +0000, Kumar Ranjit-B04060 escreveu:
> I am able to do profiling using perf record and report for a 32 bit
> application but for 64 bit application, its not able to resolve the
> symbols. Anyone faced similar problem??
> I am doing this for e5500 core.
Can you provide some more details?
. Which distro
. readelf -s /path/to/your/64-bit/app output . elfutils version
should be a good start.
- Arnaldo
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