Hi, How about:
This patch adds support for the SNB-EP PCU uncore PMU extra_sel_bit (bit 21) which is missing from the documentation in Table-2.75 of Intel® Xeon® Processor E5-2600 Product Family Uncore Performance Monitoring Guide. It is referred to later in Table-2.81. Without this selection bit explicitly enabled by the kernel, some events such as COREx_TRANSITION_CYCLES do not count correctly. On Mon, Aug 12, 2013 at 5:29 PM, Andi Kleen <[email protected]> wrote: > On Mon, Aug 12, 2013 at 05:16:32PM +0200, Peter Zijlstra wrote: >> On Wed, Aug 07, 2013 at 02:17:25PM +0800, Yan, Zheng wrote: >> > From: "Yan, Zheng" <[email protected]> >> > >> > PCU uncore event control register has a undocumented ev_sel_ext bit. >> > The bit is needed by Andi's pmu-tools. >> >> Please provide documentation. Andi needing it isn't a good changelog (or >> even reason). > > The bit is in the uncore guide, just not in the register documentation, > but in the event descriptions. > > e.g. the PCU part calls it "Extra Select Bit" > > -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/
