Intel Xeon E5-2600 Series - Page 134

Intel® Xeon® Processor E5-2600 Product Family Uncore Performance Monitoring
134 Reference Number: 327043-001
PrefetchHint 1111 SNP Snoop Prefetch Hint
RdCode 0001 HOM0 Read cache line in F (or S, if the F state not supported)
RdCur 0000 HOM0 Request a cache line in I. Typically issued by I/O proxy
entities, RdCur is used to obtain a coherent snapshot of
an uncached cache line.
RdData 0010 HOM0 Read cache line in either E or F (or S, if F state not
supported). The choice between F (or S) and E is
determined by whether or not per caching agent has
cache line in S state.
RdInvOwn 0100 HOM0 Read Invalidate Own requests a cache line in M or E
state. M or E is determined by whether requester is
forwarded an M copy by a peer caching agent or sent an
E copy by home agent.
RspCnflt 0100 HOM1 Peer is left with line in I or S state, and the peer has a
conflicting outstanding request.
RspCnfltOwn 0110 HOM1 Peer has a buried M copy for this line with an outstanding
conflicting request.
RspFwd 1000 HOM1 Peer has sent data to requestor with no change in cache
state
RspFwdI 1001 HOM1 Peer has sent data to requestor and is left with line in I
state
RspFwdIWb 1011 HOM1 Peer has sent data to requestor and a WbIData to the
home, and is left with line in I state
RspFwdS 1010 HOM1 Peer has sent data to requestor and is left with line in S
state
RspFwdSWb 1100 HOM1 Peer has sent data to requestor and a WbSData to the
home, and is left with line in S state
RspI 0000 HOM1 Peer left with line in I-state
RspIWb 1101 HOM1 Peer has evicted the data with an in-flight WbIData[Ptl]
message to the home and has not sent any message to
the requestor.
RspS 0001 HOM1 Peer left with line in S-state
RspSWb 1110 HOM1 Peer has sent a WbSData message to the home, has not
sent any message to the requestor and is left with line in
S-state
SnpCode 0001 SNP Snoop Code (get data in F or S state)
- Supports getting data in F state
SnpCur 0000 SNP Snoop to get data in I state
SnpData 0010 SNP Snoop Data (get data in E, F or S state)
- Supports getting data in E or F state
SnpInvItoE 1000 SNP Snoop Invalidate to E state. To invalidate peer caching
agent, flushing any M state data to home
SnpInvOwn 0100 SNP Snoop Invalidate Own (get data in E or M state)
- Supports getting data in E state
SnpInvXtoI 0101 SNP Snoop Invalidate Writeback M to I state. To invalidate
peer caching agent, flushing any M state data to home.
WbEData 0110 DRS Writeback data, downgrade to E state
WbEDataPtl 1010 DRS Partial (byte-masked) writeback data, downgrade to E
state
WbIData 0100 DRS Writeback data, downgrade to I state
WbIDataPtl 1000 DRS Partial (byte-masked) writeback data, downgrade to I
state
Table 2-144.Opcodes (Alphabetical Listing) (Sheet 3 of 4)
Name Opc MC
Gen
By?
Desc