Uncore Manual

Reference Number: 329468-002 83
Uncore Performance Monitoring
Memory Controller (iMC) Performance Monitoring
2.5.7 iMC Box Common Metrics (Derived Events)
The following table summarizes metrics commonly calculated from iMC Box events.
WR_CAS_RANK6 0xbe 0-3 1 WR_CAS Access to Rank 6
WR_CAS_RANK7 0xbf 0-3 1 WR_CAS Access to Rank 7
WMM_TO_RMM 0xc0 0-3 1 Transition from WMM to RMM because of
low threshold
WRONG_MM 0xc1 0-3 1 Not getting the requested Major Mode
Symbol Name:
Definition
Equation
MEM_BW_READS:
Memory bandwidth consumed by reads.
Expressed in bytes.
(CAS_COUNT.RD * 64)
MEM_BW_TOTAL:
Total memory bandwidth. Expressed in
bytes.
MEM_BW_READS + MEM_BW_WRITES
MEM_BW_WRITES:
Memory bandwidth consumed by writes
Expressed in bytes.
(CAS_COUNT.WR * 64)
PCT_CYCLES_CRITICAL_THROTTLE:
The percentage of cycles all DRAM ranks in
critical thermal throttling
POWER_CRITICAL_THROTTLE_CYCLES /
MC_Chy_PCI_PMON_CTR_FIXED
PCT_CYCLES_DLLOFF:
The percentage of cycles all DRAM ranks in
CKE slow (DLOFF) mode
POWER_CHANNEL_DLLOFF /
MC_Chy_PCI_PMON_CTR_FIXED
PCT_CYCLES_DRAM_RANKx_IN_CKE:
The percentage of cycles DRAM rank (x)
spent in CKE ON mode.
POWER_CKE_CYCLES.RANKx /
MC_Chy_PCI_PMON_CTR_FIXED
PCT_CYCLES_DRAM_RANKx_IN_THR:
The percentage of cycles DRAM rank (x)
spent in thermal throttling.
POWER_THROTTLE_CYCLES.RANKx /
MC_Chy_PCI_PMON_CTR_FIXED
PCT_CYCLES_PPD:
The percentage of cycles all DRAM ranks in
PPD mode
POWER_CHANNEL_PPD / MC_Chy_PCI_PMON_CTR_FIXED
PCT_CYCLES_SELF_REFRESH:
The percentage of cycles Memory is in self
refresh power mode
POWER_SELF_REFRESH / MC_Chy_PCI_PMON_CTR_FIXED
PCT_RD_REQUESTS:
Percentage of read requests from total
requests.
RPQ_INSERTS / (RPQ_INSERTS + WPQ_INSERTS)
PCT_REQUESTS_PAGE_EMPTY:
Percentage of memory requests that
resulted in Page Empty
(ACT_COUNT - PRE_COUNT.PAGE_MISS)/ (CAS_COUNT.RD
+ CAS_COUNT.WR)
PCT_REQUESTS_PAGE_HIT:
Percentage of memory requests that
resulted in Page Hits
1 - (PCT_REQUESTS_PAGE_EMPTY +
PCT_REQUESTS_PAGE_MISS)
PCT_REQUESTS_PAGE_MISS:
Percentage of memory requests that
resulted in Page Misses
PRE_COUNT.PAGE_MISS / (CAS_COUNT.RD +
CAS_COUNT.WR)
PCT_WR_REQUESTS:
Percentage of write requests from total
requests.
WPQ_INSERTS / (RPQ_INSERTS + WPQ_INSERTS)
Symbol Name
Event
Code
Ctrs
Max
Inc/
Cyc
Description