Intel® Xeon® Processor E5-2600 Product Family Uncore Performance Monitoring
110
Reference Number: 327043-001
TxL_INSERTS
• Title:
Tx Flit Buffer Allocations
• Category:
TXQ Events
• Event Code:
0x04
• Max. Inc/Cyc:
1,
Register Restrictions:
0-3
• Definition:
Number of allocations into the Intel® QPI Tx Flit Buffer. Generally, when data is trans-
mitted across Intel® QPI, it will bypass the TxQ and pass directly to the link. However, the TxQ will
be used with L0p and when LLR occurs, increasing latency to transfer out to the link. This event can
be used in conjunction with the Flit Buffer Occupancy event in order to calculate the average flit
buffer lifetime.
TxL_OCCUPANCY
• Title:
Tx Flit Buffer Occupancy
• Category:
TXQ Events
• Event Code:
0x07
• Max. Inc/Cyc:
1,
Register Restrictions:
0-3
• Definition:
Accumulates the number of flits in the TxQ. Generally, when data is transmitted across
Intel® QPI, it will bypass the TxQ and pass directly to the link. However, the TxQ will be used with
L0p and when LLR occurs, increasing latency to transfer out to the link. This can be used with the
cycles not empty event to track average occupancy, or the allocations event to track average life-
time in the TxQ.
Table 2-103. Unit Masks for TxL_FLITS_G2
Extension
umask
[15:8]
Description
NDR_AD
bxxxxxxx1
Non-Data Response Tx Flits - AD:
Counts the total number of flits transmitted over the NDR (Non-Data
Response) channel. This channel is used to send a variety of protocol
flits including grants and completions. This is only for NDR packets to
the local socket which use the AK ring.
NDR_AK
bxxxxxx1x
Non-Data Response Tx Flits - AK:
Counts the total number of flits transmitted over the NDR (Non-Data
Response) channel. This channel is used to send a variety of protocol
flits including grants and completions. This is only for NDR packets
destined for Route-thru to a remote socket.
NCB_DATA
bxxxxx1xx
Non-Coherent data Tx Flits:
Number of Non-Coherent Bypass data flits. These flits are generally
used to transmit non-coherent data across Intel® QPI. This does not
include a count of the DRS (coherent) data flits. This only counts the
data flits, not te NCB headers.
NCB_NONDATA
bxxxx1xxx
Non-Coherent non-data Tx Flits:
Number of Non-Coherent Bypass non-data flits. These packets are
generally used to transmit non-coherent data across Intel® QPI, and
the flits counted here are for headers and other non-data flits. This
includes extended headers.
NCB
b00001100
Non-Coherent Bypass Tx Flits:
Number of Non-Coherent Bypass flits. These packets are generally
used to transmit non-coherent data across Intel® QPI.
NCS
bxxx1xxxx
Non-Coherent standard Tx Flits:
Number of NCS (non-coherent standard) flits transmitted over Intel®
QPI. This includes extended headers.
