•Avg Snoop Requests

This is the average number of live snoop responses that reside in the snoop request queue per cycle.

•C2C/Snoop

This is the fraction of snoops that local processor detects that it has a modified version of the data the a remote processor has requested as a result of a data cache miss. It does not include implicit writebacks as a result of a modified hit on a line that is being flushed in response to an fc instruction.

•Snoops/Sec

This is the number of snoops per second that the local processor sees on a bus-based system when a remote processor takes a data cache miss or issues a flush cache (fc) instruction. It also include local processor self snoops.

•Dmiss/Sec

This is the number of data misses from the L3 cache of the local processor per second.

•Load

This is the fractional component of the total data misses per second that is due to load misses for the local processor.

•Store

This is the fractional component of the total data misses per second that is due to store misses for the local processor.

•% C2C - All Miss

This is the percentage of local processor read and store misses that are satisfied by a remote processors cache.

•% C2C - Dmiss

This is the percentage of local processor data misses (load and store) that are satisfied by a remote processors cache.

•% C2C - Load

This is the percentage of local processor load misses that are satisfied by a remote processors cache.

•% C2C - Store

This is the percentage of local processor store misses that are satisfied by a remote processors cache.

cpi Event Set

The cpi event set provides information related to cycles per instruction (CPI).

If you use this event set, the default is to make the measurements irrespective of CPU operating state (that is, user, system, or interrupt states). By default, the idle state is not included in the measurement. You can use command-line options to limit the scope of the measurement. Specifically, you can:

•Limit measurement to a specific privilege level: -m event_set[:alluserkernel]

•Include idle: --exclude-idle False

•Exclude the interruption state: --measure-on-interrupts off

•Only measure the interruption state: --measure-on-interrupts only

236 Event Set Descriptions for CPU Metrics