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libpfm_intel_ivb_unc(3) — Linux manual page

LIBPFM(3)               Linux Programmer's ManualLIBPFM(3)

NAME        top

       libpfm_intel_ivb_unc - support for Intel Ivy Bridge uncore PMU

SYNOPSIS        top

#include <perfmon/pfmlib.h>PMU name: ivb_unc_cbo0, ivb_unc_cbo1, ivb_unc_cbo2, ivb_unc_cbo3PMU desc: Intel Ivy Bridge C-box uncore

DESCRIPTION        top

       The library supports the Intel Ivy Bridge client part (model 58)       uncore PMU.  The support is currently limited to the Coherency       Box, so called C-Box for up to 4 physical cores.       Each physical core has an associated C-Box which it uses to       communicate with the L3 cache. The C-boxes all support the same       set of events. However, Core 0 C-box (snb_unc_cbo0) supports an       additional uncore clock ticks event:UNC_CLOCKTICKS.

MODIFIERS        top

       The following modifiers are supported on Intel Ivy Bridge C-Box       uncore PMU:iInvert the meaning of the event. The counter will now count              cycles in which the event isnotoccurring. This is a              boolean modifiereEnable edge detection, i.e., count only when there is a              state transition from no occurrence of the event to at              least one occurrence. This modifier must be combined with a              counter mask modifier (m) with a value greater or equal to              one.  This is a boolean modifier.cSet the counter mask value. The mask acts as a threshold.              The counter will count the number of cycles in which the              number of occurrences of the event is greater or equal to              the threshold. This is an integer modifier with values in              the range [0:255].       Both theUNC_CBO_CACHE_LOOKUPandUNC_CBO_XSNP_RESPONSErequires       two umasks to be valid.  ForUNC_CBO_CACHE_LOOKUPthe first umask       must be one of the MESI state umasks, the second has to be one of       the filters.  ForUNC_CBO_XSNP_RESPONSEthe first umask must be       one of the snoop types, the second has to be one of the filters.

AUTHORS        top

       Stephane Eranian <eranian@gmail.com>

COLOPHON        top

       This page is part of theperfmon2 (a performance monitoring       library) project.  Information about the project can be found at       ⟨http://perfmon2.sourceforge.net/⟩.  If you have a bug report for       this manual page, send it to perfmon2-devel@lists.sourceforge.net.       This page was obtained from the project's upstream Git repository       ⟨git://git.code.sf.net/p/perfmon2/libpfm4 perfmon2-libpfm4⟩ on       2025-08-11.  (At that time, the date of the most recent commit       that was found in the repository was 2025-06-29.)  If you discover       any rendering problems in this HTML version of the page, or you       believe there is a better or more up-to-date source for the page,       or you have corrections or improvements to the information in this       COLOPHON (which isnot part of the original manual page), send a       mail to man-pages@man7.org                                June, 2013LIBPFM(3)

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