Query: libpfm_intel_nhm_unc
OS: centos
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
LIBPFM(3) Linux Programmer's Manual LIBPFM(3) NAME libpfm_intel_nhm_unc - support for Intel Nehalem uncore PMUSYNOPSIS#include <perfmon/pfmlib.h> PMU name: nhm_unc PMU desc: Intel Nehalem uncoreDESCRIPTIONThe 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 privi- lege levels.MODIFIERSThe 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 occur- rences 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.AUTHORSStephane Eranian <eranian@gmail.com> September, 2009 LIBPFM(3)