fix callgraphs of 32-bit processes on 64-bit kernels.
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From: Ingo Molnar on 16 Mar 2010 06:30 * T?r?k Edwin <edwintorok(a)gmail.com> wrote: > On 03/16/2010 10:47 AM, Ingo Molnar wrote: > > * T??r??k Edwin <edwintorok(a)gmail.com> wrote: > > > >> On 03/15/2010 06:23 PM, T??r??k Edwin wrote: > >>> On 03/15/2010 05:34 PM, T??r??k Edwin wrote: > >>>> It would be good if perf knew how to lookup symbols in kernel modules! > >>> BTW perf report -m -k /home/edwin/builds/linux-2.6/vmlinux doesn't show > >>> the symbols either. > >> I always forget that, unlike every other program, perf doesn't install > >> by default to /usr/local! > >> So I was running the wrong version of perf (from an older kernel), since > >> perf was installed to $HOME/bin (which of course isn't in sudo's path). > >> > >> Sorry for the confusion, the 2.6.33 perf DOES know how to lookup the > >> symbols: > >> 9.92% glxgears [radeon] [k] > >> r600_packet3_check > >> | > >> --- r600_packet3_check > >> | > >> |--96.80%-- r600_cs_parse > > > > Ok, great! > > BTW the patch I sent yesterday for tracing 32-bit apps is still needed, > since that is a kernel patch, and it wasn't due to using the wrong perf. I've Cc:-ed Frederic for that bug. (Frederic has written a good deal of that code) > > I suspect we could install into /usr/local too. Do you want to send a patch > > for that? > > Sent. > > BTW I think perf would need some documentation on how to install, and what > packages you need to build everything, what permissions it needs to run, > etc. Agreed. (I've Cc:-ed Arnaldo who has a pending fix in this area.) Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |