Vol. 3C 35-195
MODEL-SPECIFIC REGISTERS (MSRS)
23:16
Package
Maximum Ratio Limit for 3C
Maximum turbo ratio limit of 3 core active.
31:24
Package
Maximum Ratio Limit for 4C
Maximum turbo ratio limit of 4 core active.
63:32
Reserved.
391H
913
MSR_UNC_PERF_GLOBAL_
CTRL
Package
Uncore PMU global control
0
Core 0 select
1
Core 1 select
2
Core 2 select
3
Core 3 select
18:4
Reserved.
29
Enable all uncore counters
30
Enable wake on PMI
31
Enable Freezing counter when overflow
63:32
Reserved.
392H
914
MSR_UNC_PERF_GLOBAL_
STATUS
Package
Uncore PMU main status
0
Fixed counter overflowed
1
An ARB counter overflowed
2
Reserved
3
A CBox counter overflowed (on any slice)
63:4
Reserved.
394H
916
MSR_UNC_PERF_FIXED_
CTRL
Package
Uncore fixed counter control (R/W)
19:0
Reserved
20
Enable overflow propagation
21
Reserved
22
Enable counting
63:23
Reserved.
395H
917
MSR_UNC_PERF_FIXED_
CTR
Package
Uncore fixed counter
47:0
Current count
63:48
Reserved.
396H
918
MSR_UNC_CBO_CONFIG
Package
Uncore C-Box configuration information (R/O)
3:0
Encoded number of C-Box, derive value by “-1“
63:4
Reserved.
3B0H
946
MSR_UNC_ARB_PERFCTR0
Package
Uncore Arb unit, performance counter 0
Table 35-28. MSRs Supported by 4th Generation Intel® Core™ Processors (Haswell microarchitecture) (Contd.)
Register
Address
Register Name
Scope
Bit Description
Hex
Dec