19-114 Vol. 3B
PERFORMANCE-MONITORING EVENTS
60H
02H
UNC_DRAM_OPEN.CH1
Counts number of DRAM Channel 1 open commands
issued either for read or write. To read or write data,
the referenced DRAM page must first be opened.
60H
04H
UNC_DRAM_OPEN.CH2
Counts number of DRAM Channel 2 open commands
issued either for read or write. To read or write data,
the referenced DRAM page must first be opened.
61H
01H
UNC_DRAM_PAGE_CLOSE.CH0 DRAM channel 0 command issued to CLOSE a page due
to page idle timer expiration. Closing a page is done by
issuing a precharge.
61H
02H
UNC_DRAM_PAGE_CLOSE.CH1 DRAM channel 1 command issued to CLOSE a page due
to page idle timer expiration. Closing a page is done by
issuing a precharge.
61H
04H
UNC_DRAM_PAGE_CLOSE.CH2 DRAM channel 2 command issued to CLOSE a page due
to page idle timer expiration. Closing a page is done by
issuing a precharge.
62H
01H
UNC_DRAM_PAGE_MISS.CH0
Counts the number of precharges (PRE) that were
issued to DRAM channel 0 because there was a page
miss. A page miss refers to a situation in which a page
is currently open and another page from the same
bank needs to be opened. The new page experiences a
page miss. Closing of the old page is done by issuing a
precharge.
62H
02H
UNC_DRAM_PAGE_MISS.CH1
Counts the number of precharges (PRE) that were
issued to DRAM channel 1 because there was a page
miss. A page miss refers to a situation in which a page
is currently open and another page from the same
bank needs to be opened. The new page experiences a
page miss. Closing of the old page is done by issuing a
precharge.
62H
04H
UNC_DRAM_PAGE_MISS.CH2
Counts the number of precharges (PRE) that were
issued to DRAM channel 2 because there was a page
miss. A page miss refers to a situation in which a page
is currently open and another page from the same
bank needs to be opened. The new page experiences a
page miss. Closing of the old page is done by issuing a
precharge.
63H
01H
UNC_DRAM_READ_CAS.CH0
Counts the number of times a read CAS command was
issued on DRAM channel 0.
63H
02H
UNC_DRAM_READ_CAS.AUTO
PRE_CH0
Counts the number of times a read CAS command was
issued on DRAM channel 0 where the command issued
used the auto-precharge (auto page close) mode.
63H
04H
UNC_DRAM_READ_CAS.CH1
Counts the number of times a read CAS command was
issued on DRAM channel 1.
63H
08H
UNC_DRAM_READ_CAS.AUTO
PRE_CH1
Counts the number of times a read CAS command was
issued on DRAM channel 1 where the command issued
used the auto-precharge (auto page close) mode.
63H
10H
UNC_DRAM_READ_CAS.CH2
Counts the number of times a read CAS command was
issued on DRAM channel 2.
Table 19-20. Non-Architectural Performance Events In the Processor Uncore for
Processors Based on Intel® Microarchitecture Code Name Westmere (Contd.)
Event
Num.
Umask
Value
Event Mask Mnemonic
Description
Comment