On Wed, Sep 04, 2013 at 10:21:27AM -0400, Vince Weaver wrote: > On Wed, 4 Sep 2013, Andi Kleen wrote: > > > > What does this mean? The above values are exported as part of > > > include/uapi/linux/perf_event.h > > > Do they not work yet? > > > > You can filter on the fields, but you can't see them outside > > the kernel driver yet. The patch to see them is still pending. > > so you can filter for aborts, but they'll never show up in the lbr[] > sample buffer?
They will show up, you just don't know that they are aborts because the two new status bits are not exported. > > > > > > 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. > > > > Then you get all branches too > > > > (that's how all the other filters work too) > > This is a really confusing API > > so does setting "PERF_SAMPLE_BRANCH_ANY" also enable all of the TX types? > > Is leaving branch_sample_type at 0 the same as setting it to all 1s? I believe so. It may be also that the catch all only works if everything is 0. -Andi -- [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
