Re: [PATCH 4/4] perf symbols: Capture the running kernel buildid too

[Arnaldo Carvalho de Melo <acme@infradead.org>]

Em Wed, Nov 18, 2009 at 08:20:53PM -0200, Arnaldo Carvalho de Melo escreveu:
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> [root@doppio linux-2.6-tip]# perf record -a -f sleep 3s ; perf
> buildid-list | grep vmlinux
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.171 MB perf.data (~7489 samples) ]
> 18e7cc53db62a7d35e9d6f6c9ddc23017d38ee9a vmlinux
> [root@doppio linux-2.6-tip]#
> 
> Several refactorings were needed so that we can have simmetry between
> dsos__load_modules and dsos__load_kernel, i.e. those functions will
> respectively create and add to the dsos list the loaded modules and
> kernel, with its buildids, but not load its symbols. That is something
> the subcomands that need will have to call dso__load_kernel_sym(), just
> like we do with modules with dsos__load_module_sym()/dso__load_module_sym().

And that can even be deferred to when we get a kernel sample, thinking
about 'perf top --hide_kernel_symbols', this makes a lot of sense 8-)

Tomorrow tho.

- Arnaldo