Em Sat, Jan 11, 2014 at 06:58:16PM +0100, Andi Kleen escreveu: > On Sat, Jan 11, 2014 at 04:36:14PM +0100, Jiri Olsa wrote: > > On Fri, Jan 10, 2014 at 04:32:03AM -0800, Andi Kleen wrote: > > > From: Andi Kleen <a...@linux.intel.com> > > > > > > I never found the default LBR display mode which generates histograms > > > of individual branches particularly useful. > > > > > > This implements an alternative mode that creates histograms over complete > > > branch traces, instead of individual branches, similar to how normal > > > callgraphs are handled. This is done by putting it in > > > front of the normal callgraph and then using the normal callgraph > > > histogram infrastructure to unify them. > > > > > > This way in complex functions we can understand the control flow > > > that lead to a particular sample. > > > > > > The default output is unchanged. > > > > > > This is only implemented in perf report, no change to record > > > or anywhere else. > > > > > > This adds the basic code to report: > > > - add a new "branch" option to the -g option parser to enable this mode > > > - when the flag is set include the LBR into the callstack in machine.c. > > > The rest of the history code is unchanged and doesn't know the difference > > > between LBR entry and normal call entry. > > > > sounds like nice idea, but I could not get the patchset applied > > on acme's perf/core > > It was on Linus master. > > I tried to rebase on perf/core, but it seems to be totally broken by > itself. All the config tests fail on my opensuse system. > > Arnaldo?
Oops, checking on some systems... > Auto-detecting system features: > ... backtrace: [ OFF ] > ... dwarf: [ OFF ] > ... fortify-source: [ OFF ] > ... glibc: [ OFF ] > ... gtk2: [ OFF ] > ... gtk2-infobar: [ OFF ] > ... libaudit: [ OFF ] > ... libbfd: [ OFF ] > ... libelf: [ OFF ] > ... libelf-getphdrnum: [ OFF ] > ... libelf-mmap: [ OFF ] > ... libnuma: [ OFF ] > ... libperl: [ OFF ] > ... libpython: [ OFF ] > ... libpython-version: [ OFF ] > ... libslang: [ OFF ] > ... libunwind: [ OFF ] > ... on-exit: [ OFF ] > ... stackprotector-all: [ OFF ] > ... timerfd: [ OFF ] > > config/Makefile:282: *** No gnu/libc-version.h found, please install > glibc-dev[el]/glibc-static. Stop. > make: *** [all] Error 2 > > -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
