On Tue, 3 Sep 2013, Andi Kleen wrote: > > > + PERF_SAMPLE_BRANCH_ABORT_TX = 1U << 7, /* transaction aborts */ > > > + PERF_SAMPLE_BRANCH_IN_TX = 1U << 8, /* in transaction */ > > > + PERF_SAMPLE_BRANCH_NO_TX = 1U << 9, /* not in transaction */ > > > > so if you specify these flags in branch_sample_type, what information > > appears in the branch record? > > This is just a filter, so when set branches that do not satisfy > the filter are not reported.
Is the implementation a direct mapping to the LBR documentation or has it been generic so non-Intel architectures can use it? > The patches to export the new fields haven't been merged yet. What does this mean? The above values are exported as part of include/uapi/linux/perf_event.h Do they not work yet? > > What happens if you set both in transaction and not in? > > Then you get all branches. so what happens if you set neither "PERF_SAMPLE_BRANCH_IN_TX" nor "PERF_SAMPLE_BRANCH_NO_TX"? Logically you'd get no branches at all, but that can't be true as all code prior to 3.11 didn't set those values. Vince -- 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/
