On Mon, 2 Mar 2015, Stephane Eranian wrote: > vince,
> PEBS machine state. Problem is that there is only one set of pt_regs passed to > __intel_pmu_pebs_event(). And if REGS_INTR is set, then the pt_regs > registers are > indeed overwritten with PEBS captured state. To avoid the issue, we > would have to > carry around two sets of pt_regs. I don't think we have to carry around both (would that ever be useful?) Just that the behavior is a bit surprising and I should document it in the manpage. One question I do have: if it never makes sense to measure REGS_USER and REGS_INTR at the same time, why was the latter added at all? Why not just have the REGS_USER information automatically upgrade to REGS_INTR if precise_ip is high enough? 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/
