Re: Very slow clang kernel config ..

[Nick Desaulniers]

On Fri, Apr 30, 2021 at 5:23 PM Nick Desaulniers
<ndesaulniers@xxxxxxxxxx> wrote:
>
> On Fri, Apr 30, 2021 at 5:19 PM Nick Desaulniers
> <ndesaulniers@xxxxxxxxxx> wrote:
> >
> > A quick:
> > $ perf record -e cycles:pp --call-graph lbr make LLVM=1 LLVM_IAS=1
> > -j72 allmodconfig
> > $ perf report --no-children --sort=dso,symbol
> > shows:
> >      2.35%  [unknown]                [k] 0xffffffffabc00fc7
> > +    2.29%  libc-2.31.so             [.] _int_malloc
> >      1.24%  libc-2.31.so             [.] _int_free
> > +    1.23%  ld-2.31.so               [.] do_lookup_x
>
> ^ bfd


> > +    0.63%  ld-2.31.so               [.] _dl_lookup_symbol_x
>
> ^ bfd

Ah, no, sorry, these are the runtime link editor/loader. So probably
spending quite some time resolving symbols in large binaries.

-- 
Thanks,
~Nick Desaulniers