Intel ARCHITECTURE IA-32 - Manual (Page 478)

IA-32 Intel® Architecture Optimization
B-24
Trace Cache
Misses The number of times
that significant
delays occurred in
order to decode
instructions and build
a trace because of a
TC miss. BPU_fetch_request TCMISS
TC to ROM
Transfers Twice the number of
times that the ROM
microcode is
accessed to decode
complex IA-32
instructions instead
of building|delivering
traces. (Divide the
count by 2 to get the
number of
occurrence.) tc_ms_xfer CISC
Speculative
TC-Built Uops The number of
speculative uops
originating when the
TC is in build mode. uop_queue_writes FROM_TC_BUILD
Speculative
TC-Delivered
Uops The number of
speculative uops
originating when the
TC is in deliver
mode. uop_queue_writes FROM_TC_DELIVER
Speculative
Microcode
Uops The number of
speculative uops
originating from the
microcode ROM (Not
all uops of an
instruction from the
microcode ROM will
be included). uop_queue_writes FROM_ROM
continued
Table B-1 Pentium 4 Processor Performance Metrics (continued)
Metric Description
Event Name or Metric
Expression Event Mask Value
Required