Hi Milian, Is it possible to share your test case/steps with me?
Does --call-graph fp work? Thanks, Kan > > Milian Wolff <[email protected]> writes: > > > > OK, with a more recent perf v4.2.rc5 on a Intel(R) Core(TM) i7-4770 > > CPU @ 3.40GHz it actually works. Somewhat :) It is much faster, but > > the callstacks don't terminate properly, and are sometimes not > > correctly demangled. I observe the following behavior: > > > > 15.56% ex_string_compa libQt5Core.so.5.5.0 [.] > QString::compare_helper > > | > > |--5.84%-- > > > _ZN7QString14compare_helperEPK5QChariS2_iN2Qt15CaseSensitivityE@pl > t > > Maybe the demangler doesn't like the @plt. > > > > | QString::compare_helper > > | main > > | | > > | |--4.24%-- main > > | | | > > | | |--1.60%-- main > > | | | | > > | | | |--1.07%-- main > > Yes that looks like a bug. > > Adding Kan. > > -Andi > > > | | | | | > > | | | | |--0.54%-- main > > | | | | | main > > | | | | | > > | | | | --0.53%-- > > QString::compare_helper > > | | | | main > > | | | | > > | | | --0.53%-- > > QString::compare_helper > > | | | main > > | | | main > > | | | > > QString::compare_helper > > | | | main > > | | | > > QString::compare_helper > > ... > > > > The correct callgraph, as shown by --call-graph dwarf, is: > > > > 21.62% ex_string_compa libQt5Core.so.5.5.0 [.] > QString::compare_helper > > | > > ---QString::compare_helper > > main > > > > Is this a known (undocumented) limitation or a bug? Is there anything > > I could do to get this fixed? > > > > Thanks > > -- > [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
