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Using Performance Monitoring Events B
B-33
Writes from the
Processor
The number of all
write transactions on
the bus that were
allocated in IO
Queue from this
processor (excludes
RFOs). Beware of
granularity issues
with this event. Also
Beware of different
recipes in mask bits
for Pentium 4 and
Intel Xeon
processors between
CPUID model field
value of 2 and model
value less than 2.
IOQ_allocation 1a. ReqA0,
ALL_WRITE, OWN
(CPUID model <
2);
1b. ReqA0,
ALL_WRITE,
MEM_WB, MEM_WT,
MEM_WP, MEM_WC,
MEM_UC, OWN
(CPUID model >=
2).
2. Enable edge
filtering
6
in
the CCCR.
Reads
Non-prefetch
from the
Processor
The number of all
read transactions
(includes RFOs but
excludes prefetches)
on the bus that
originated from this
processor. Beware of
granularity issues
with this event. Also
Beware of different
recipes in mask bits
for Pentium 4 and
Intel Xeon
processors between
CPUID model field
value of 2 and model
value less than 2.
IOQ_allocation 1a. ReqA0
,
ALL_READ, OWN
(CPUID model <
2);
1b. ReqA0,
ALL_READ,
MEM_WB, MEM_WT,
MEM_WP, MEM_WC,
MEM_UC, OWN
(CPUID model >=
2).
2. Enable edge
filtering
6
in
the CCCR.
continued
Table B-1 Pentium 4 Processor Performance Metrics (continued)
Metric Description
Event Name or Metric
Expression
Event Mask Value
Required