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libpfm_intel_snbep_unc_r3qpi(3) [centos man page]

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

NAME
libpfm_intel_snbep_unc_r3qpi - support for Intel Sandy Bridge-EP R3QPI uncore PMU SYNOPSIS
#include <perfmon/pfmlib.h> PMU name: snbep_unc_r3qpi0, snbep_unc_r3qpi0 PMU desc: Intel Sandy Bridge-EP R3QPI uncore PMU DESCRIPTION
The library supports the Intel Sandy Bridge R3QPI uncore PMU. This PMU model only exists on Sandy Bridge model 45. There are two R3QPI PMUs per processor socket. MODIFIERS
The following modifiers are supported on Intel Sandy Bridge R3PQI uncore PMU: i Invert the meaning of the event. The counter will now count R3QPI cycles in which the event is not occurring. This is a boolean mod- ifier e Enable 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 threshold modifier (t) with a value greater or equal to one. This is a boolean modifier. t Set the threshold value. When set to a non-zero value, the counter counts the number of R3QPI 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 [0:15]. AUTHORS
Stephane Eranian <eranian@gmail.com> August, 2012 LIBPFM(3)

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

NAME
libpfm_intel_snbep_unc_pcu - support for Intel Sandy Bridge-EP Power Controller Unit (PCU) uncore PMU SYNOPSIS
#include <perfmon/pfmlib.h> PMU name: snbep_unc_pcu PMU desc: Intel Sandy Bridge-EP PCU uncore PMU DESCRIPTION
The library supports the Intel Sandy Bridge Power Controller Unit uncore PMU. This PMU model only exists on Sandy Bridge model 45. There is only one PCU PMU per processor socket. MODIFIERS
The following modifiers are supported on Intel Sandy Bridge C-Box uncore PMU: i Invert the meaning of the event. The counter will now count HA cycles in which the event is not occurring. This is a boolean modi- fier e Enable 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 threshold modifier (t) with a value greater or equal to one. This is a boolean modifier. t Set the threshold value. When set to a non-zero value, the counter counts the number of HA 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 [0:15]. ff Enable frequency band filtering. This modifier applies only to the UNC_P_FREQ_BANDx_CYCLES events, where x is [0-3]. The modifiers expects an integer in the range [0-255]. The value is interpreted as a frequency value to be multipled by 100Mhz. Thus if the value is 32, then all cycles where the processor is running at 3.2GHz and more are counted. Frequency band filtering There are 3 events which support frequency band filtering, namely, UNC_P_FREQ_BAND0_CYCLES, UNC_P_FREQ_BAND1_CYCLES, UNC_P_FREQ_BAND2_CYCLES, UNC_P_FREQ_BAND3_CYCLES. The frequency filter (available via the ff modifier) is stored into a PMU shared register which hold all 4 possible frequency bands, one per event. However, the library generate the encoding for each event individually because it processes events one at a time. The caller or the underlying kernel interface may have to merge the band filter settings to program the filter register properly. AUTHORS
Stephane Eranian <eranian@gmail.com> August, 2012 LIBPFM(3)
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