On Packet Transmission Events; Table 2-36. S-Box Data Structure Occupancy Events - Intel BX80571E7500 - Core 2 Duo 2.93 GHz Processor Programming Manual

I ® X ® P 7500 S
NTEL EON ROCESSOR
Structure/Event Name
System Bound HOM Message
Queue
TO_R_B_HOM_MSGQ_OCCUPANCY
System Bound SNP Message Queue
TO_R_SNP_MSGQ_OCCUPANCY
System Bound NDR Message Queue
TO_R_NDR_MSGQ_OCCUPANCY
System Bound DRS Message Queue
TO_R_DRS_MSGQ_OCCUPANCY
System Bound NCB Message Queue
TO_R_NCB_MSGQ_OCCUPANCY
System Bound NCS Message Queue
TO_R_NCS_MSGQ_OCCUPANCY
Ring Bound Message Queue
TO_RING_MSGQ_OCCUPANCY
Ring Bound NDR Message Queue
TO_RING_NDR_MSGQ_OCCUPANC
Y
Ring Bound R2S Message Queue
TO_RING_R2S_MSGQ_OCCUPANCY
Ring Bound B2S Message Queue
TO_RING_B2S_MSGQ_OCCUPANCY
Request Table
2.5.4.3

On Packet Transmission Events

For the message classes that have variable length messages, the S-Box has separate events which
count the number of flits of those message classes sent or received (i.e PKTS_SENT_HOM vs. PKTS/
FLITS_SENT_NCB). For message classes that have fixed length messages, the total number of flits can
be calculated by multiplying the total messages by the number of flits per message (i.e.
PKTS_RCVD_NCB).
Message Class
HOM
SNP
NDR
Ring Bound DRS
Ring Bound NCS
U P G
ERIES NCORE ROGRAMMING UIDE

Table 2-36. S-Box Data Structure Occupancy Events

Subev
RBOX
B-Box
ALL
SNP
NCS
NCB
ALL
Flits per
Msg
1
1
1
9 R2S and B2S DRS messages are always full cacheline messages which are 9
flits.
NOTE: flits are variable in the Sys Bound direction.
3 The only ring bound NCS message type is NcMsgS. There are always 3 flits.
NOTE: flits are variable in the Sys Bound direction.
UNCORE PERFORMANCE MONITORING
Max Insta
Description/Comment
Entries nces
64 2 HOM Packet to System
64
1 buffer for R-Box and 1 for B-Box, 64
64 entries each. The sum of the occupied
entries in the two header buffers will never
exceed 64.
32 1 SNP Packet to System
16 1 NDR Packet to System
16 4 DRS Packet to System
16 4 NCB Packet to System
16 4 NCS Packet to System
31 1 Packets from System (SNP/NCS/NCB - NDR
is separate)
4
4 The total of the buffer entries occupied by
all 3 message classes will never exceed 36.
36
32 1 NDR Packet from System
8 1 DRS Packet from R-Box
8 1 DRS Packet from B-Box
48 1 System Bound Request
Comment
2-52