Performance Monitor
PowerPC e500 Core Family Reference Manual, Rev. 1
Freescale Semiconductor 7-13
Table 7-9 describes how event types are indicated in Table 7-10.
Table 7-10 describes performance monitor events. Pipeline events in Table 7-10 are defined in
Chapter 4, “Execution Timing.”
Table 7-9. Event Types
Event Type Label Description
Reference Ref:# Shared across counters PMC0—PMC3. Applicable to most microprocessors.
Common Com:# Shared across counters PMC0–PMC3. Fairly specific to e500 microarchitectures.
Counter-specific C[0–3]:# Counted only on one or more specific counters. The notation indicates the counter to which
an event is assigned. For example, an event assigned to counter PMC2 is shown as C2:#.
Table 7-10. Performance Monitor Event Selection
Number Event
Spec/
Nonspec
Count Description
General Events
Ref:0 Nothing Nonspec Register counter holds current value
Ref:1 Processor cycles Nonspec Every processor cycle
Ref:2 Instructions completed Nonspec Completed instructions. 0, 1, or 2 per cycle.
Com:3 Micro-ops completed
1
Nonspec Completed micro-ops. 0, 1, or 2 per cycle. (1 for each standard
instruction, 2 for load/store-with-update. 1–32 for load or store
multiple instructions)
Com:4 Instructions fetched Spec Fetched instructions. 0, 1, 2, 3, or 4 per cycle. (instructions written to
the IQ.)
Com:5 Micro-ops decoded
1
Spec Micro-ops decoded. 0, 1, or 2 per cycle. (2 for load/store-with-update)
Com:6 PM_EVENT transitions Spec 0 to 1 transitions on the
pm_event
input.
Com:7 PM_EVENT cycles Spec Processor cycles that occur when the
pm_event
input is asserted.
Instruction Types Completed
Com:8 Branch instructions completed Nonspec Completed branch instructions.
Com:9 Load micro-ops completed
1
Nonspec Completed load micro-ops. (l*, evl*, load-update (1 load micro-op),
load-multiple (1–32 micro-ops), dcbt(L1, CT = 0), and dcbtst(L1, CT
= 0)
Com:10 Store micro-ops completed
1
Nonspec Completed store micro-ops. (st*, evst*, store-update (1 store
micro-op), store-multiple (1–32 micro-ops), tlbivax, icbi, icblc,
icbtls, dcba, dcbf, dcblc, dcbst, dcbt(L2, CT = 1), dcbtls,
dcbtst(L2, CT = 1), dcbtstls, dcbz, icbt(L2, CT = 1), mbar, and
msync)
Com:11 Number of CQ redirects Nonspec Fetch redirects initiated from the completion unit. (for example,
resulting from sc, rfi, rfci, rfmci, isync, and interrupts)
Branch Prediction and Execution Events
Com:12 Branches finished Spec Includes all branch instructions
Com:13 Taken branches finished Spec Includes all taken branch instructions
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