LIBPFM(3) Linux Programmer's Manual LIBPFM(3)
libpfm_intel_nhm_unc - support for Intel Nehalem uncore PMU
#include <perfmon/pfmlib.h> PMU name: nhm_unc PMU desc: Intel Nehalem uncore
The library supports the Nehalem uncore PMU as implemented by processors such as Intel Core i7, and Intel Core i5. The PMU is located at the socket-level and is therefore shared between the various cores. By construction it can only measure at all privilege levels.
The following modifiers are supported on Intel Nehalem processors: i Invert the meaning of the event. The counter will now count cycles in which the event is not occurring. This is a boolean modifier e Enable edge detection, i.e., count only when there is a state transition. This is a boolean modifier. c Set 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]. o Causes the queue occupancy counter associated with the event to be cleared (zeroed). This is a boolean modifier.
Stephane Eranian <firstname.lastname@example.org>
This page is part of the perfmon2 (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 email@example.com. This page was obtained from the project's upstream Git repository ⟨git://git.code.sf.net/p/perfmon2/libpfm4 perfmon2-libpfm4⟩ on 2021-06-20. (At that time, the date of the most recent commit that was found in the repository was 2021-06-09.) 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 is not part of the original manual page), send a mail to firstname.lastname@example.org September, 2009 LIBPFM(3)
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