Em Fri, Jun 20, 2014 at 02:49:42PM +0400, Stanislav Fomichev escreveu: > This patch series adds support for pagefaults tracing to 'perf trace' command. > It seems this feature was planned by Namhyung Kim > (http://events.linuxfoundation.org/images/stories/pdf/klf2012_n_kim.pdf page > 17/28) > but I couldn't find any prior patches/discussion and started from scratch.
Just to clarify here, those slides came from slides I made and in turn the whole idea about pagefaults tracing I got from the trace prototype that Thomas Gleixner implemented in his 'trace' utility, described here: Announcing a new utility: 'trace' http://lwn.net/Articles/415728/ The comments section has lots of interesting ideas, some you may find interesting to implement :-) There is a branch in my tree with the branch tglx did his work on: https://git.kernel.org/cgit/linux/kernel/git/acme/linux.git/log/?h=tmp.perf/trace2 There you can take a look and compare what you're doing to what he did. Now I'll go thru your current patches and will cherry pick whatever I think its OK already, and will try and provide comments for whatever I think needs more work. - Arnaldo > First three patches add the feature and options to enable faults and disable > syscalls. > Two last patches add events caching (like it's done in the perf kvm), so that > we don't get fault events prior to mmap/comm events (makes sense only > for live mode). > > This is just a proof-of-concept, and I'd like to get some comments about > where and what I got wrong and what additional useful information I can > expose in the trace. > > v2: > - added more info to the changelogs > - reworked options (-f -> -F, --pgfaults -> --pf=[all|min|maj]) > - separated tracepoint_handler changes into additional patch > - separated record/replay into additional patch > - other fixes pointed out by Arnaldo Carvalho de Melo > > Stanislav Fomichev (7): > perf trace: add perf_event parameter to tracepoint_handler > perf trace: add support for pagefault tracing > perf trace: add pagefaults record and replay support > perf trace: add pagefault statistics > perf trace: add possibility to switch off syscall events > perf kvm: move perf_kvm__mmap_read into session utils > perf trace: add events cache > > tools/perf/Documentation/perf-trace.txt | 19 ++ > tools/perf/builtin-kvm.c | 88 +------- > tools/perf/builtin-trace.c | 350 > ++++++++++++++++++++++---------- > tools/perf/util/session.c | 85 ++++++++ > tools/perf/util/session.h | 5 + > 5 files changed, 357 insertions(+), 190 deletions(-) > > -- > 1.8.3.2 -- 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/
