PMC.K8(3) FreeBSD Library Functions Manual PMC.K8(3)
NAME
pmc.k8 - measurement events for AMD Athlon 64 (K8 family) CPUs
LIBRARY
Performance Counters Library (libpmc, -lpmc)
SYNOPSIS
#include <pmc.h>
DESCRIPTION
AMD K8 PMCs are present in the AMD Athlon64 and AMD Opteron series of
CPUs. They are documented in the BIOS and Kernel Developer's Guide for
the AMD Athlon(tm) 64 and AMD Opteron Processors, Publication No. 26094,
Advanced Micro Devices, Inc., April 2004.
PMC Features
AMD K8 PMCs are 48 bits wide. Each CPU contains 4 PMCs with the
following capabilities:
Capability Support
PMC_CAP_CASCADE No
PMC_CAP_EDGE Yes
PMC_CAP_INTERRUPT Yes
PMC_CAP_INVERT Yes
PMC_CAP_READ Yes
PMC_CAP_PRECISE No
PMC_CAP_SYSTEM Yes
PMC_CAP_TAGGING No
PMC_CAP_THRESHOLD Yes
PMC_CAP_USER Yes
PMC_CAP_WRITE Yes
Event Qualifiers
Event specifiers for AMD K8 PMCs can have the following optional
qualifiers:
count=value
Configure the counter to increment only if the number of
configured events measured in a cycle is greater than or equal to
value.
edge Configure the counter to only count negated-to-asserted
transitions of the conditions expressed by the other fields. In
other words, the counter will increment only once whenever a
given condition becomes true, irrespective of the number of
clocks during which the condition remains true.
inv Invert the sense of comparison when the "count" qualifier is
present, making the counter to increment when the number of
events per cycle is less than the value specified by the "count"
qualifier.
mask=qualifier
Many event specifiers for AMD K8 PMCs need to be additionally
qualified using a mask qualifier. These additional qualifiers
are event-specific and are documented along with their associated
event specifiers below.
os Configure the PMC to count events happening at privilege level 0.
usr Configure the PMC to count events occurring at privilege levels
1, 2 or 3.
If neither of the "os" or "usr" qualifiers were specified, the default is
to enable both.
AMD K8 Event Specifiers
The event specifiers supported on AMD K8 PMCs are:
k8-bu-cpu-clk-unhalted
(Event 76H) Count the number of clock cycles when the CPU is not
in the HLT or STPCLK states.
k8-bu-fill-request-l2-miss [,mask=qualifier]
(Event 7EH) Count fill requests that missed in the L2 cache.
This event may be further qualified using qualifier, which is a
`+' separated set of the following keywords:
dc-fill
Count data cache fill requests.
ic-fill
Count instruction cache fill requests.
tlb-reload
Count TLB reloads.
The default is to count all types of requests.
k8-bu-fill-into-l2 [,mask=qualifier]
(Event 7FH) The number of lines written to and from the L2 cache.
The event may be further qualified by using qualifier, which is a
`+' separated set of the following keywords:
dirty-l2-victim
Count lines written into L2 cache due to victim
writebacks from the Icache or Dcache, TLB page table
walks or hardware data prefetches.
victim-from-l2
Count writebacks of dirty lines from L2 to the system.
k8-bu-internal-l2-request [,mask=qualifier]
(Event 7DH) Count internally generated requests to the L2 cache.
This event may be further qualified using qualifier, which is a
`+' separated set of the following keywords:
cancelled
Count cancelled requests.
dc-fill
Count data cache fill requests.
ic-fill
Count instruction cache fill requests.
tag-snoop
Count tag snoop requests.
tlb-reload
Count TLB reloads.
The default is to count all types of requests.
k8-dc-access
(Event 40H) Count data cache accesses including microcode scratch
pad accesses.
k8-dc-copyback [,mask=qualifier]
(Event 44H) Count data cache copyback operations. This event may
be further qualified using qualifier, which is a `+' separated
set of the following keywords:
exclusive
Count operations for lines in the "exclusive" state.
invalid
Count operations for lines in the "invalid" state.
modified
Count operations for lines in the "modified" state.
owner Count operations for lines in the "owner" state.
shared Count operations for lines in the "shared" state.
The default is to count operations for lines in all the above
states.
k8-dc-dcache-accesses-by-locks [,mask=qualifier]
(Event 4CH) Count data cache accesses by lock instructions. This
event is only available on processors of revision C or later
vintage. This event may be further qualified using qualifier,
which is a `+' separated set of the following keywords:
accesses
Count data cache accesses by lock instructions.
misses Count data cache misses by lock instructions.
The default is to count all accesses.
k8-dc-dispatched-prefetch-instructions [,mask=qualifier]
(Event 4BH) Count the number of dispatched prefetch instructions.
This event may be further qualified using qualifier, which is a
`+' separated set of the following keywords:
load Count load operations.
nta Count non-temporal operations.
store Count store operations.
The default is to count all operations.
k8-dc-l1-dtlb-miss-and-l2-dtlb-hit
(Event 45H) Count L1 DTLB misses that are L2 DTLB hits.
k8-dc-l1-dtlb-miss-and-l2-dtlb-miss
(Event 46H) Count L1 DTLB misses that are also misses in the L2
DTLB.
k8-dc-microarchitectural-early-cancel-of-an-access
(Event 49H) Count microarchitectural early cancels of data cache
accesses.
k8-dc-microarchitectural-late-cancel-of-an-access
(Event 48H) Count microarchitectural late cancels of data cache
accesses.
k8-dc-misaligned-data-reference
(Event 47H) Count misaligned data references.
k8-dc-miss
(Event 41H) Count data cache misses.
k8-dc-one-bit-ecc-error [,mask=qualifier]
(Event 4AH) Count one bit ECC errors found by the scrubber. This
event may be further qualified using qualifier, which is a `+'
separated set of the following keywords:
scrubber
Count scrubber detected errors.
piggyback
Count piggyback scrubber errors.
The default is to count both kinds of errors.
k8-dc-refill-from-l2 [,mask=qualifier]
(Event 42H) Count data cache refills from L2 cache. This event
may be further qualified using qualifier, which is a `+'
separated set of the following keywords:
exclusive
Count operations for lines in the "exclusive" state.
invalid
Count operations for lines in the "invalid" state.
modified
Count operations for lines in the "modified" state.
owner Count operations for lines in the "owner" state.
shared Count operations for lines in the "shared" state.
The default is to count operations for lines in all the above
states.
k8-dc-refill-from-system [,mask=qualifier]
(Event 43H) Count data cache refills from system memory. This
event may be further qualified using qualifier, which is a `+'
separated set of the following keywords:
exclusive
Count operations for lines in the "exclusive" state.
invalid
Count operations for lines in the "invalid" state.
modified
Count operations for lines in the "modified" state.
owner Count operations for lines in the "owner" state.
shared Count operations for lines in the "shared" state.
The default is to count operations for lines in all the above
states.
k8-fp-cycles-with-no-fpu-ops-retired
(Event 01H) Count cycles when no FPU ops were retired. This
event is supported in revision B and later CPUs.
k8-fp-dispatched-fpu-fast-flag-ops
(Event 02H) Count dispatched FPU ops that use the fast flag
interface. This event is supported in revision B and later CPUs.
k8-fp-dispatched-fpu-ops [,mask=qualifier]
(Event 00H) Count the number of dispatched FPU ops. This event
is supported in revision B and later CPUs. This event may be
further qualified using qualifier, which is a `+' separated set
of the following keywords:
add-pipe-excluding-junk-ops
Count add pipe ops excluding junk ops.
add-pipe-junk-ops
Count junk ops in the add pipe.
multiply-pipe-excluding-junk-ops
Count multiply pipe ops excluding junk ops.
multiply-pipe-junk-ops
Count junk ops in the multiply pipe.
store-pipe-excluding-junk-ops
Count store pipe ops excluding junk ops
store-pipe-junk-ops
Count junk ops in the store pipe.
The default is to count all types of ops.
k8-fr-decoder-empty
(Event D0H) Count cycles when there was nothing to dispatch
(i.e., the decoder was empty).
k8-fr-dispatch-stall-for-segment-load
(Event D4H) Count dispatch stalls for segment loads.
k8-fr-dispatch-stall-for-serialization
(Event D3H) Count dispatch stalls for serialization.
k8-fr-dispatch-stall-from-branch-abort-to-retire
(Event D2H) Count dispatch stalls from branch abort to retiral.
k8-fr-dispatch-stall-when-fpu-is-full
(Event D7H) Count dispatch stalls when the FPU is full.
k8-fr-dispatch-stall-when-ls-is-full
(Event D8H) Count dispatch stalls when the load/store unit is
full.
k8-fr-dispatch-stall-when-reorder-buffer-is-full
(Event D5H) Count dispatch stalls when the reorder buffer is
full.
k8-fr-dispatch-stall-when-reservation-stations-are-full
(Event D6H) Count dispatch stalls when reservation stations are
full.
k8-fr-dispatch-stall-when-waiting-far-xfer-or-resync-branch-pending
(Event DAH) Count dispatch stalls when a far control transfer or
a resync branch is pending.
k8-fr-dispatch-stall-when-waiting-for-all-to-be-quiet
(Event D9H) Count dispatch stalls when waiting for all to be
quiet.
k8-fr-dispatch-stalls
(Event D1H) Count all dispatch stalls.
k8-fr-fpu-exceptions [,mask=qualifier]
(Event DBH) Count FPU exceptions. This event is supported in
revision B and later CPUs. This event may be further qualified
using qualifier, which is a `+' separated set of the following
keywords:
sse-and-x87-microtraps
Count SSE and x87 microtraps.
sse-reclass-microfaults
Count SSE reclass microfaults
sse-retype-microfaults
Count SSE retype microfaults
x87-reclass-microfaults
Count x87 reclass microfaults.
The default is to count all types of exceptions.
k8-fr-interrupts-masked-cycles
(Event CDH) Count cycles when interrupts were masked (by CPU
RFLAGS field IF was zero).
k8-fr-interrupts-masked-while-pending-cycles
(Event CEH) Count cycles while interrupts were masked while
pending (i.e., cycles when INTR was asserted while CPU RFLAGS
field IF was zero).
k8-fr-number-of-breakpoints-for-dr0
(Event DCH) Count the number of breakpoints for DR0.
k8-fr-number-of-breakpoints-for-dr1
(Event DDH) Count the number of breakpoints for DR1.
k8-fr-number-of-breakpoints-for-dr2
(Event DEH) Count the number of breakpoints for DR2.
k8-fr-number-of-breakpoints-for-dr3
(Event DFH) Count the number of breakpoints for DR3.
k8-fr-retired-branches
(Event C2H) Count retired branches including exceptions and
interrupts.
k8-fr-retired-branches-mispredicted
(Event C3H) Count mispredicted retired branches.
k8-fr-retired-far-control-transfers
(Event C6H) Count retired far control transfers (which are always
mispredicted).
k8-fr-retired-fastpath-double-op-instructions [,mask=qualifier]
(Event CCH) Count retired fastpath double op instructions. This
event is supported in revision B and later CPUs. This event may
be further qualified using qualifier, which is a `+' separated
set of the following keywords:
low-op-pos-0
Count instructions with the low op in position 0.
low-op-pos-1
Count instructions with the low op in position 1.
low-op-pos-2
Count instructions with the low op in position 2.
The default is to count all types of instructions.
k8-fr-retired-fpu-instructions [,mask=qualifier]
(Event CBH) Count retired FPU instructions. This event is
supported in revision B and later CPUs. This event may be
further qualified using qualifier, which is a `+' separated set
of the following keywords:
mmx-3dnow
Count MMX and 3DNow! instructions.
packed-sse-sse2
Count packed SSE and SSE2 instructions.
scalar-sse-sse2
Count scalar SSE and SSE2 instructions
x87 Count x87 instructions.
The default is to count all types of instructions.
k8-fr-retired-near-returns
(Event C8H) Count retired near returns.
k8-fr-retired-near-returns-mispredicted
(Event C9H) Count mispredicted near returns.
k8-fr-retired-resyncs
(Event C7H) Count retired resyncs (non-control transfer
branches).
k8-fr-retired-taken-branches
(Event C4H) Count retired taken branches.
k8-fr-retired-taken-branches-mispredicted
(Event C5H) Count retired taken branches that were mispredicted.
k8-fr-retired-taken-branches-mispredicted-by-addr-miscompare
(Event CAH) Count retired taken branches that were mispredicted
only due to an address miscompare.
k8-fr-retired-taken-hardware-interrupts
(Event CFH) Count retired taken hardware interrupts.
k8-fr-retired-uops
(Event C1H) Count retired uops.
k8-fr-retired-x86-instructions
(Event C0H) Count retired x86 instructions including exceptions
and interrupts.
k8-ic-fetch
(Event 80H) Count instruction cache fetches.
k8-ic-instruction-fetch-stall
(Event 87H) Count cycles in stalls due to instruction fetch.
k8-ic-l1-itlb-miss-and-l2-itlb-hit
(Event 84H) Count L1 ITLB misses that are L2 ITLB hits.
k8-ic-l1-itlb-miss-and-l2-itlb-miss
(Event 85H) Count ITLB misses that miss in both L1 and L2 ITLBs.
k8-ic-microarchitectural-resync-by-snoop
(Event 86H) Count microarchitectural resyncs caused by snoops.
k8-ic-miss
(Event 81H) Count instruction cache misses.
k8-ic-refill-from-l2
(Event 82H) Count instruction cache refills from L2 cache.
k8-ic-refill-from-system
(Event 83H) Count instruction cache refills from system memory.
k8-ic-return-stack-hits
(Event 88H) Count hits to the return stack.
k8-ic-return-stack-overflow
(Event 89H) Count overflows of the return stack.
k8-ls-buffer2-full
(Event 23H) Count load/store buffer2 full events.
k8-ls-locked-operation [,mask=qualifier]
(Event 24H) Count locked operations. For revision C and later
CPUs, the following qualifiers are supported:
cycles-in-request
Count the number of cycles in the lock request/grant
stage.
cycles-to-complete
Count the number of cycles a lock takes to complete once
it is non-speculative and is the older load/store
operation.
locked-instructions
Count the number of lock instructions executed.
The default is to count the number of lock instructions executed.
k8-ls-microarchitectural-late-cancel
(Event 25H) Count microarchitectural late cancels of operations
in the load/store unit.
k8-ls-microarchitectural-resync-by-self-modifying-code
(Event 21H) Count microarchitectural resyncs caused by self-
modifying code.
k8-ls-microarchitectural-resync-by-snoop
(Event 22H) Count microarchitectural resyncs caused by snoops.
k8-ls-retired-cflush-instructions
(Event 26H) Count retired CFLUSH instructions.
k8-ls-retired-cpuid-instructions
(Event 27H) Count retired CPUID instructions.
k8-ls-segment-register-load [,mask=qualifier]
(Event 20H) Count segment register loads. This event may be
further qualified using qualifier, which is a `+' separated set
of the following keywords:
cs Count CS register loads.
ds Count DS register loads.
es Count ES register loads.
fs Count FS register loads.
gs Count GS register loads.
ss Count SS register loads.
The default is to count all types of loads.
k8-nb-ht-bus0-bandwidth [,mask=qualifier]
k8-nb-ht-bus1-bandwidth [,mask=qualifier]
k8-nb-ht-bus2-bandwidth [,mask=qualifier]
(Events F6H, F7H and F8H respectively) Count events on the
HyperTransport(tm) buses. These events may be further qualified
using qualifier, which is a `+' separated set of the following
keywords:
buffer-release
Count buffer release messages sent.
command
Count command messages sent.
data Count data messages sent.
nop Count nop messages sent.
The default is to count all types of messages.
k8-nb-memory-controller-bypass-saturation [,mask=qualifier]
(Event E4H) Count memory controller bypass counter saturation
events. This event may be further qualified using qualifier,
which is a `+' separated set of the following keywords:
dram-controller-interface-bypass
Count DRAM controller interface bypass.
dram-controller-queue-bypass
Count DRAM controller queue bypass.
memory-controller-hi-pri-bypass
Count memory controller high priority bypasses.
memory-controller-lo-pri-bypass
Count memory controller low priority bypasses.
k8-nb-memory-controller-dram-slots-missed
(Event E2H) Count memory controller DRAM command slots missed (in
MemClks).
k8-nb-memory-controller-page-access-event [,mask=qualifier]
(Event E0H) Count memory controller page access events. This
event may be further qualified using qualifier, which is a `+'
separated set of the following keywords:
page-conflict
Count page conflicts.
page-hit
Count page hits.
page-miss
Count page misses.
The default is to count all types of events.
k8-nb-memory-controller-page-table-overflow
(Event E1H) Count memory control page table overflow events.
k8-nb-memory-controller-turnaround [,mask=qualifier]
(Event E3H) Count memory control turnaround events. This event
may be further qualified using qualifier, which is a `+'
separated set of the following keywords:
dimm-turnaround
Count DIMM turnarounds.
read-to-write-turnaround
Count read to write turnarounds.
write-to-read-turnaround
Count write to read turnarounds.
The default is to count all types of events.
k8-nb-probe-result [,mask=qualifier]
(Event ECH) Count probe events. This event may be further
qualified using qualifier, which is a `+' separated set of the
following keywords:
probe-hit
Count all probe hits.
probe-hit-dirty-no-memory-cancel
Count probe hits without memory cancels.
probe-hit-dirty-with-memory-cancel
Count probe hits with memory cancels.
probe-miss
Count probe misses.
k8-nb-sized-commands [,mask=qualifier]
(Event EBH) Count sized commands issued. This event may be
further qualified using qualifier, which is a `+' separated set
of the following keywords:
nonpostwrszbyte
nonpostwrszdword
postwrszbyte
postwrszdword
rdszbyte
rdszdword
rdmodwr
The default is to count all types of commands.
Event Name Aliases
The following table shows the mapping between the PMC-independent aliases
supported by Performance Counters Library (libpmc, -lpmc) and the
underlying hardware events used.
Alias Event
branches k8-fr-retired-taken-branches
branch-mispredicts k8-fr-retired-taken-branches-mispredicted
dc-misses k8-dc-miss
ic-misses k8-ic-miss
instructions k8-fr-retired-x86-instructions
interrupts k8-fr-taken-hardware-interrupts
unhalted-cycles k8-bu-cpu-clk-unhalted
SEE ALSO
pmc(3), pmc.atom(3), pmc.core(3), pmc.core2(3), pmc.iaf(3), pmc.k7(3),
pmc.soft(3), pmc.tsc(3), pmclog(3), hwpmc(4)
HISTORY
The pmc library first appeared in FreeBSD 6.0.
AUTHORS
The Performance Counters Library (libpmc, -lpmc) library was written by
Joseph Koshy <jkoshy@FreeBSD.org>.
FreeBSD 13.1-RELEASE-p6 October 4, 2008 FreeBSD 13.1-RELEASE-p6
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