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.\" $FreeBSD: release/9.1.0/lib/libpmc/pmc.sandybridgeuc.3 236238 2012-05-29 14:50:21Z fabient $
.\"
.Dd February 12, 2012
.Dt PMC.SANDYBRIDGEUC 3
.Os
.Sh NAME
.Nm pmc.sandybridgeuc
.Nd uncore measurement events for
.Tn Intel
.Tn Sandy Bridge
family CPUs
.Sh LIBRARY
.Lb libpmc
.Sh SYNOPSIS
.In pmc.h
.Sh DESCRIPTION
.Tn Intel
.Tn "Sandy Bridge"
CPUs contain PMCs conforming to version 3 of the
.Tn Intel
performance measurement architecture.
These CPUs contain two classes of PMCs:
.Bl -tag -width "Li PMC_CLASS_UCP"
.It Li PMC_CLASS_UCF
Fixed-function counters that count only one hardware event per counter.
.It Li PMC_CLASS_UCP
Programmable counters that may be configured to count one of a defined
set of hardware events.
.El
.Pp
The number of PMCs available in each class and their widths need to be
determined at run time by calling
.Xr pmc_cpuinfo 3 .
.Pp
Intel Sandy Bridge PMCs are documented in
.Rs
.%B "Intel(R) 64 and IA-32 Architectures Software Developers Manual"
.%T "Volume 3B: System Programming Guide, Part 2"
.%N "Order Number: 253669-039US"
.%D May 2011
.%Q "Intel Corporation"
.Re
.Ss SANDYBRIDGE UNCORE FIXED FUNCTION PMCS
These PMCs and their supported events are documented in
.Xr pmc.ucf 3 .
Not all CPUs in this family implement fixed-function counters.
.Ss SANDYBRIDGE UNCORE PROGRAMMABLE PMCS
The programmable PMCs support the following capabilities:
.Bl -column "PMC_CAP_INTERRUPT" "Support"
.It Em Capability Ta Em Support
.It PMC_CAP_CASCADE Ta \&No
.It PMC_CAP_EDGE Ta Yes
.It PMC_CAP_INTERRUPT Ta \&No
.It PMC_CAP_INVERT Ta Yes
.It PMC_CAP_READ Ta Yes
.It PMC_CAP_PRECISE Ta \&No
.It PMC_CAP_SYSTEM Ta \&No
.It PMC_CAP_TAGGING Ta \&No
.It PMC_CAP_THRESHOLD Ta Yes
.It PMC_CAP_USER Ta \&No
.It PMC_CAP_WRITE Ta Yes
.El
.Ss Event Qualifiers
Event specifiers for these PMCs support the following common
qualifiers:
.Bl -tag -width indent
.It Li cmask= Ns Ar value
Configure the PMC to increment only if the number of configured
events measured in a cycle is greater than or equal to
.Ar value .
.It Li edge
Configure the PMC to count the number of de-asserted to asserted
transitions of the conditions expressed by the other qualifiers.
If specified, the counter will increment only once whenever a
condition becomes true, irrespective of the number of clocks during
which the condition remains true.
.It Li inv
Invert the sense of comparison when the
.Dq Li cmask
qualifier is present, making the counter increment when the number of
events per cycle is less than the value specified by the
.Dq Li cmask
qualifier.
.El
.Ss Event Specifiers (Programmable PMCs)
Sandy Bridge programmable PMCs support the following events:
.Bl -tag -width indent
.It Li CBO_XSNP_RESPONSE.RSPIHITI
.Pq Event 22H, Umask 01H
Snoop responses received from processor cores to requests initiated by this 
Cbox.
Must combine with one of the umask values of 20H, 40H, 80H
.It Li CBO_XSNP_RESPONSE.RSPIHITFSE
.Pq Event 22H, Umask 02H
Must combine with one of the umask values of 20H, 40H, 80H
.It Li CBO_XSNP_RESPONSE.RSPSHITFSE
.Pq Event 22H, Umask 04H
Must combine with one of the umask values of 20H, 40H, 80H
.It Li CBO_XSNP_RESPONSE.RSPSFWDM
.Pq Event 22H, Umask 08H
.It Li CBO_XSNP_RESPONSE.RSPIFWDM
.Pq Event 22H, Umask 01H
.It Li CBO_XSNP_RESPONSE.AND_EXTERNAL
.Pq Event 22H, Umask 20H
Filter on cross-core snoops resulted in external snoop request. 
Must combine with at least one of 01H, 02H, 04H, 08H, 10H
.It Li CBO_XSNP_RESPONSE.AND_XCORE
.Pq Event 22H, Umask 40H
Filter on cross-core snoops resulted in core request. 
Must combine with at least one of 01H, 02H, 04H, 08H, 10H
.It Li CBO_XSNP_RESPONSE.AND_XCORE
.Pq Event 22H, Umask 80H
Filter on cross-core snoops resulted in LLC evictions. 
Must combine with at least one of 01H, 02H, 04H, 08H, 10H
.It Li CBO_CACHE_LOOKUP.M
.Pq Event 34H, Umask 01H
LLC lookup request that access cache and found line in M-state.
Must combine with one of the umask values of 10H, 20H, 40H, 80H
.It Li CBO_CACHE_LOOKUP.E
.Pq Event 34H, Umask 02H 
LLC lookup request that access cache and found line in E-state.
Must combine with one of the umask values of 10H, 20H, 40H, 80H
.It Li CBO_CACHE_LOOKUP.S
.Pq Event 34H, Umask 04H 
LLC lookup request that access cache and found line in S-state.
Must combine with one of the umask values of 10H, 20H, 40H, 80H
.It Li CBO_CACHE_LOOKUP.I
.Pq Event 34H, Umask 08H 
LLC lookup request that access cache and found line in I-state.
Must combine with one of the umask values of 10H, 20H, 40H, 80H
.It Li CBO_CACHE_LOOKUP.AND_READ
.Pq Event 34H, Umask 10H
Filter on processor core initiated cacheable read requests. 
Must combine with at least one of 01H, 02H, 04H, 08H
.It Li CBO_CACHE_LOOKUP_AND_READ2
.Pq Event 34H, Umask 20H
Filter on processor core initiated cacheable write requests. 
Must combine with at least one of 01H, 02H, 04H, 08H
.It Li CBO_CACHE_LOOKUP.AND_EXTSNP
.Pq Event 34H, Umask 40H
Filter on external snoop requests. 
Must combine with at least one of 01H, 02H, 04H, 08H
.It Li CBO_CACHE_LOOKUP.AND_ANY
.Pq Event 34H, Umask 80H
Filter on any IRQ or IPQ initiated requests including uncacheable, 
noncoherent requests. 
Must combine with at least one of 01H, 02H, 04H, 08H
.It Li IMPH_CBO_TRK_OCCUPANCY.ALL
.Pq Event 80H, Umask 01H
Counts cycles weighted by the number of core-outgoing valid entries. 
Valid entries are between allocation to the first of IDIO or DRSO messages. 
Accounts for coherent and incoherent traffic.
Counter 0 only
.It Li IMPH_CBO_TRK_REQUEST.ALL
.Pq Event 81H, Umask 01H
Counts the number of core-outgoing entries. 
Accounts for coherent and incoherent traffic.
.It Li IMPH_CBO_TRK_REQUEST.WRITES
.Pq Event 81H, Umask 20H
Counts the number of allocated write entries, include full, partial, and 
evictions.
.It Li IMPH_CBO_TRK_REQUEST.EVICTIONS
.Pq Event 81H, Umask 80H
Counts the number of evictions allocated.
.It Li IMPH_COH_TRK_OCCUPANCY.ALL
.Pq Event 83H, Umask 01H
Counts cycles weighted by the
number of core-outgoing valid entries in the coherent tracker queue.
Counter 0 only
.It Li IMPH_COH_TRK_REQUEST.ALL
.Pq Event 84H, Umask 01H
Counts the number of core-outgoing entries in the coherent tracker queue.
.El
.Sh SEE ALSO
.Xr pmc 3 ,
.Xr pmc.atom 3 ,
.Xr pmc.core 3 ,
.Xr pmc.corei7 3 ,
.Xr pmc.corei7uc 3 ,
.Xr pmc.iaf 3 ,
.Xr pmc.k7 3 ,
.Xr pmc.k8 3 ,
.Xr pmc.p4 3 ,
.Xr pmc.p5 3 ,
.Xr pmc.p6 3 ,
.Xr pmc.sandybridge 3 ,
.Xr pmc.soft 3 ,
.Xr pmc.tsc 3 ,
.Xr pmc.ucf 3 ,
.Xr pmc.westmere 3 ,
.Xr pmc.westmereuc 3 ,
.Xr pmc_cpuinfo 3 ,
.Xr pmclog 3 ,
.Xr hwpmc 4
.Sh HISTORY
The
.Nm pmc
library first appeared in
.Fx 6.0 .
.Sh AUTHORS
The
.Lb libpmc
library was written by
.An "Joseph Koshy"
.Aq jkoshy@FreeBSD.org .
The support for the 
.Lb Sandy Bridge
microarchitecture was added by
.An "Davide Italiano"
.Aq davide@FreeBSD.org .