HP Caliper User Guide Release 5.5 (5900-2351, August 2012)

• 64 Byte - Hit
This is the fraction of 64-byte data snoops that hit a cache line, out of all data snoops (64-byte
and 128-byte).
• 64 Byte - Hitm
This is the fraction of 64-byte data snoops that hit a modified cache line, out of all data snoops
(64-byte and 128-byte).
• 64 Byte - Impwb
This is the fraction of 64-byte data snoops that are due to implicit write backs, out of all data
snoops (64-byte and 128-byte).
• Inv Snoop - Hitm
This is the fraction of invalid snoops that hit a modified cache line, out of all invalid snoops
(64-byte and 128-byte).
• Inv Snoop - Impwb
This is the fraction of invalid snoops that are due to implicit write backs, out of all invalid
snoops (64-byte and 128-byte).
• Inv Snoop - 64B
This is the fraction of invalid snoops that are 64-byte snoops, out of all invalid snoops (64-byte
and 128-byte).
replay Event Set
Available only on Intel® Itanium® 9500 processor systems.
The replay event set provides information about CPU cycles lost due to instruction replays, breaking
them down into the different types of replays.
Metrics Available from this Measurement
The following metrics are available from this event set. These descriptions do not take into account
any command-line options you might use.
The metrics are:
• Cycles
The number of clock cycles (CPU_OP_CYCLES.ALL). (NOTE : If necessary the user can calculate
the exact number of various replay cycles using this value).
• FET
Percentage of cycles spent in replay in the Fetch stage of the frontend part of the pipeline.
• IBD
Percentage of cycles spent in replay in the Instruction buffer & dispersal stage.
• EXE
Percentage of cycles spent in replay in the Instruction execute stage.
• DET
Percentage of cycles spent in replay in the Detect Exception stage.
• WB2
Percentage of cycles spent in replay in the Writeback2 stage.
stall Event Set
The stall event set provides information on primary CPU performance limiters by breaking the
CPI into seven components.
replay Event Set 257