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PMC.HASWELLUC(3) |
FreeBSD Library Functions Manual |
PMC.HASWELLUC(3) |
pmc.haswelluc —
uncore measurement events for Intel Haswell family CPUs
Performance Counters Library (libpmc, -lpmc)
Intel Haswell CPUs contain PMCs conforming to version 3 of the Intel performance
measurement architecture. These CPUs contain two classes of PMCs:
PMC_CLASS_UCF
- Fixed-function counters that count only one hardware event per
counter.
PMC_CLASS_UCP
- Programmable counters that may be configured to count one of a defined set
of hardware events.
The number of PMCs available in each class and their widths need
to be determined at run time by calling
pmc_cpuinfo(3).
Intel Haswell PMCs are documented in
Combined Volumes: 1, 2A, 2B, 2C, 3A, 3B
and 3C, Intel(R) 64 and IA-32 Architectures Software
Developers Manual, Order Number: 325462-045US,
Intel Corporation, January
2013.
These PMCs and their supported events are documented in
pmc.ucf(3).
Not all CPUs in this family implement fixed-function counters.
The programmable PMCs support the following capabilities:
Capability |
Support |
PMC_CAP_CASCADE |
No |
PMC_CAP_EDGE |
Yes |
PMC_CAP_INTERRUPT |
No |
PMC_CAP_INVERT |
Yes |
PMC_CAP_READ |
Yes |
PMC_CAP_PRECISE |
No |
PMC_CAP_SYSTEM |
No |
PMC_CAP_TAGGING |
No |
PMC_CAP_THRESHOLD |
Yes |
PMC_CAP_USER |
No |
PMC_CAP_WRITE |
Yes |
Event specifiers for these PMCs support the following common qualifiers:
cmask= value
- Configure the PMC to increment only if the number of configured events
measured in a cycle is greater than or equal to
value.
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.
inv
- Invert the sense of comparison when the
“
cmask ” qualifier is present, making
the counter increment when the number of events per cycle is less than the
value specified by the “cmask ”
qualifier.
Haswell programmable PMCs support the following events:
UNC_CBO_XSNP_RESPONSE.MISS
- (Event 22H, Umask 01H) A snoop misses in some processor core.
UNC_CBO_XSNP_RESPONSE.INVAL
- (Event 22H, Umask 02H) A snoop invalidates a non-modified line in some
processor core.
UNC_CBO_XSNP_RESPONSE.HIT
- (Event 22H, Umask 04H) A snoop hits a non-modified line in some processor
core.
UNC_CBO_XSNP_RESPONSE.HITM
- (Event 22H, Umask 08H) A snoop hits a modified line in some processor
core.
UNC_CBO_XSNP_RESPONSE.INVAL_M
- (Event 22H, Umask 10H) A snoop invalidates a modified line in some
processor core.
UNC_CBO_XSNP_RESPONSE.EXTERNAL_FILTER
- (Event 22H, Umask 20H) Filter on cross-core snoops initiated by this Cbox
due to external snoop request.
UNC_CBO_XSNP_RESPONSE.XCORE_FILTER
- (Event 22H, Umask 40H) Filter on cross-core snoops initiated by this Cbox
due to processor core memory request.
UNC_CBO_XSNP_RESPONSE.EVICTION_FILTER
- (Event 22H, Umask 80H) Filter on cross-core snoops initiated by this Cbox
due to LLC eviction.
UNC_CBO_CACHE_LOOKUP.M
- (Event 34H, Umask 01H) LLC lookup request that access cache and found line
in M-state.
UNC_CBO_CACHE_LOOKUP.ES
- (Event 34H, Umask 06H) LLC lookup request that access cache and found line
in E or S state.
UNC_CBO_CACHE_LOOKUP.I
- (Event 34H, Umask 08H) LLC lookup request that access cache and found line
in I-state.
UNC_CBO_CACHE_LOOKUP.READ_FILTER
- (Event 34H, Umask 10H) Filter on processor core initiated cacheable read
requests. Must combine with at least one of 01H, 02H, 04H, 08H.
UNC_CBO_CACHE_LOOKUP.WRITE_FILTER
- (Event 34H, Umask 20H) Filter on processor core initiated cacheable write
requests. Must combine with at least one of 01H, 02H, 04H, 08H.
UNC_CBO_CACHE_LOOKUP.EXTSNP_FILTER
- (Event 34H, Umask 40H) Filter on external snoop requests. Must combine
with at least one of 01H, 02H, 04H, 08H.
UNC_CBO_CACHE_LOOKUP.ANY_REQUEST_FILTER
- (Event 34H, Umask 80H) Filter on any IRQ or IPQ initiated requests
including uncacheable, non-coherent requests. Must combine with at least
one of 01H, 02H, 04H, 08H.
UNC_ARB_TRK_OCCUPANCY.ALL
- (Event 80H, Umask 01H) Counts cycles weighted by the number of requests
waiting for data returning from the memory controller. Accounts for
coherent and non-coherent requests initiated by IA cores, processor
graphic units, or LLC.
UNC_ARB_TRK_REQUEST.ALL
- (Event 81H, Umask 01H) Counts the number of coherent and in-coherent
requests initiated by IA cores, processor graphic units, or LLC.
UNC_ARB_TRK_REQUEST.WRITES
- (Event 81H, Umask 20H) Counts the number of allocated write entries,
include full, partial, and LLC evictions.
UNC_ARB_TRK_REQUEST.EVICTIONS
- (Event 81H, Umask 80H) Counts the number of LLC evictions allocated.
UNC_ARB_COH ,
Umask TRK_OCCUPANCY.ALL
- (Event 83H, Umask 01H) Cycles weighted by number of requests pending in
Coherency Tracker.
UNC_ARB_COH ,
Umask TRK_REQUEST.ALL
- (Event 84H, Umask 01H) Number of requests allocated in Coherency
Tracker.
pmc(3),
pmc.atom(3),
pmc.core(3),
pmc.corei7(3),
pmc.corei7uc(3),
pmc.haswell(3),
pmc.iaf(3),
pmc.k7(3),
pmc.k8(3),
pmc.sandybridge(3),
pmc.sandybridgeuc(3),
pmc.sandybridgexeon(3),
pmc.soft(3),
pmc.tsc(3),
pmc.ucf(3),
pmc.westmere(3),
pmc.westmereuc(3),
pmc_cpuinfo(3),
pmclog(3),
hwpmc(4)
The pmc library first appeared in
FreeBSD 6.0.
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