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Using Performance Monitoring Events B
B-43
Write WC Partial
Underway
(BSQ)
8
This is an accrued
sum of the durations
of partial write
transactions to
WC-type memory.
Divide by Write WC
Partial (BSQ) to
estimate average
request latency. User
note: Allocated
entries of WC
partials that originate
from DWord
operands are not
included.
BSQ_active_entries 1. REQ_TYPE1|
REQ_LEN0|
MEM_TYPE0|
REQ_DEM_TYPE
2. Enable edge
filtering
6
in
the CCCR.
Characterization Metrics
x87 Input
Assists
The number of
occurrences of x87
input operands
needing assistance
to handle an
exception condition.
This stat is often
used in a
per-instruction ratio.
X87_assists PREA
x87 Output
Assists
The number of
occurrences of x87
operations needing
assistance to handle
an exception
condition.
X87_assists POAO, POAU
continued
Table B-1 Pentium 4 Processor Performance Metrics (continued)
Metric Description
Event Name or Metric
Expression
Event Mask Value
Required