Re: MI: performance of getting stack arguments

Vladimir Prus
2006-04-26T14:55:29Z

Daniel Jacobowitz wrote:

> On Wed, Apr 26, 2006 at 06:06:26PM +0400, Vladimir Prus wrote:
>> Ok, I'll try to do this. First on -stack-list-arguments, since it's
>> pretty slow to. But, maybe I should be using callgrind (part of valgrind
>> suite) for profiling?
>
> I've had a lot of trouble getting the valgrind tools to play nice with
> GDB; they want to debug the children too and get confused by ptrace.
> But it looks like there've been some changes and now the default is not
> to do that, so maybe it'll work better.

Ok. I'll try.

Here's the results I get for multiple -stack-list-frames commands:

% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
24.18 2.50 2.50 find_pc_sect_psymbol
18.28 4.39 1.89
lookup_minimal_symbol_by_pc_section
8.03 5.22 0.83 find_pc_sect_psymtab
6.48 5.89 0.67 find_pc_sect_section
4.06 6.31 0.42 dwarf2_frame_find_fde
3.09 6.63 0.32 find_pc_sect_line
2.03 6.84 0.21 mem_file_write
1.84 7.03 0.19 printchar

I'm not sure how to interpret this data, though.

- Volodya