lkml.org 
[lkml]   [2014]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 2/3] perf symbol: Implement a very simple ELF symbol parser
Date
Hi Arnaldo,

On Fri, 7 Nov 2014 12:26:18 -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Nov 07, 2014 at 02:20:05PM +0900, Namhyung Kim escreveu:
>> It'll be used to show (userspace) symbol names when libelf isn't (or
>> cannot be) linked.
>
> Does this deals with prelink, etc?

I believe so. :)

>
>> # Overhead Command Shared Object Symbol
>> # ........ .......... ................. .........................
>> #
>> 37.01% mem-memcpy libc-2.17.so [.] __memcpy_ssse3_back

namhyung@sejong:linux$ readelf -WS /lib64/libc-2.17.so | grep prelink
[41] .gnu.prelink_undo PROGBITS 0000000000000000 200368 000c30 01 0 0 8

namhyung@sejong:linux$ nm /lib64/libc-2.17.so | grep __memcpy_ssse3_back
0000003153f46f40 t __memcpy_ssse3_back


Thanks,
Namhyung


>> 24.25% perf ld-2.17.so [.] _dl_relocate_object
>> 22.16% perf [kernel.kallsyms] [k] kmem_cache_alloc
>> 14.29% mem-memset libc-2.17.so [.] __memset_sse2
>> 2.21% perf [kernel.kallsyms] [k] flush_signal_handlers
>> 0.07% perf [kernel.kallsyms] [k] intel_pmu_enable_all


\
 
 \ /
  Last update: 2014-11-10 08:01    [W:0.089 / U:40.640 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site