HP UX IPFilter Software manual L2icache Event Set

The metrics are:

•Total - Misses Per Second

This is the total number of L2 data cache misses per second. It includes all data load and store misses.

•Load - Misses Per Second

This is the number of data load requests that miss the L2 cache per second.

•Store - Misses Per Second

This is the number of data store requests that miss the L2 cache per second.

•Writebacks Per Second

This is the total number of L2 data cache writebacks (L3 hit and miss) per second.

•Total - Misses Per Kinst

This is the number of data (load and store) requests that miss the L2 data cache per 1000 retired instructions, including nops and predicated off instructions.

•Load - Misses Per Kinst

This is the number of load operations that miss the L2 data cache per 1000 retired instructions. Uncache loads and semaphore operations are excluded from this metric.

•Store - Misses Per Kinst

This is the number of store operations that miss the L2 data cache per 1000 retired instructions, including nops and predicated off instructions. Uncache stores and semaphore operations are excluded from this metric.

•Writebacks Per Kinst

This is the total number of L2 data cache writebacks (L3 hit and miss) per 1000 retired instructions, including nops and predicated off instructions.

•Writeback Hits Per Kinst

This is the number of cache line writebacks that hit the L3 cache per 1000 retired instructions, including nops and predicated off instructions.

•Writeback Misses Per Kinst

This is the number of cache line writebacks that miss the L3 cache per 1000 retired instructions, including nops and predicated off instructions. Writeback misses are sent directly to memory; they do not allocate the line in the L3 cache.

•Instr Per Access

This is the ratio of the total number of instructions retired per L2 data cache access, including nops and predicated off instructions. The L2 data cache accesses include RSE stores, VHPT loads, all integer and RSE loads that miss the L1 data cache, all integer stores, all floating-point loads/stores, and semaphore (counted once) operations.

•%Miss

This is the percentage of all the L2 data cache misses out of the total number of L2 data cache accesses. Accesses include all integer and RSE loads that miss the L1 data cache, all RSE and integer stores, all floating-point loads/stores, and semaphore (counted once) operations.

l2icache Event Set

The l2icache event set provides miss rate information for the L2 data cache on dual-core Itanium 2 and Itanium 9300 quad-core processor systems. On other Itanium 2 systems, use the l2cache event set, which provides the miss rate information for the unified L2 cache.

The L2 instruction cache metrics include miss information for instruction prefetch requests and instruction demand requests.

l2icache Event Set 251