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$FreeBSD: head/lib/libpmc/pmc.iaf.3 183593 2008-10-04 12:27:49Z jkoshy $
.Dd October 3, 2008 .Os .Dt PMC.IAF 3 .Sh NAME .Nm pmc.iaf .Nd measurement events for .Tn Intel fixed function performance counters. .Sh LIBRARY .Lb libpmc .Sh SYNOPSIS n pmc.h .Sh DESCRIPTION .Tn Intel fixed-function PMCs are present in CPUs that conform to version 2 or later of the .Tn Intel Performance Measurement Architecture. Each fixed-function PMC measures a specific hardware event. The number of fixed-function PMCs implemented in a CPU can vary. The number of fixed-function PMCs present can be determined at runtime by using function .Xr pmc_cpuinfo 3 .
p Intel fixed-function PMCs are documented in .Rs .%B "IA-32 Intel(R) Architecture Software Developer's Manual" .%T "Volume 3: System Programming Guide" .%N "Order Number 253669-027US" .%D July 2008 .%Q "Intel Corporation" .Re
p .Ss PMC Capabilities Fixed-function PMCs support the following capabilities: l -column "PMC_CAP_INTERRUPT" "Support" t Em Capability Ta Em Support t PMC_CAP_CASCADE Ta No t PMC_CAP_EDGE Ta No t PMC_CAP_INTERRUPT Ta Yes t PMC_CAP_INVERT Ta No t PMC_CAP_READ Ta Yes t PMC_CAP_PRECISE Ta No t PMC_CAP_SYSTEM Ta Yes t PMC_CAP_TAGGING Ta No t PMC_CAP_THRESHOLD Ta No t PMC_CAP_USER Ta Yes t PMC_CAP_WRITE Ta Yes .El .Ss Event Qualifiers (Fixed Function PMCs) These PMCs support the following modifiers: l -tag -width indent t Li os Configure the PMC to count events occurring at ring level 0. t Li usr Configure the PMC to count events occurring at ring levels 1, 2 or 3. .El
p If neither of the .Dq Li os or .Dq Li usr qualifiers are specified, the default is to enable both. .Ss Event Specifiers (Fixed Function PMCs) The fixed function PMCs are selectable using the following event names: l -tag -width indent t Li FIXED.INSTR_RETIRED.ANY
q Fixed Function Counter 0 The number of instructions retired. t Li FIXED.CPU_CLK_UNHALTED.CORE
q Fixed Function Counter 1 The number of core cycles for which the core is not halted. t Li FIXED.CPU_CLK_UNHALTED.REF
q Fixed Function Counter 2 The number of reference cycles for which the core is not halted. .El .Sh SEE ALSO .Xr pmc 3 , .Xr pmc.atom 3 , .Xr pmc.core 3 , .Xr pmc.core2 3 , .Xr pmc.k7 3 , .Xr pmc.k8 3 , .Xr pmc.p4 3 , .Xr pmc.p5 3 , .Xr pmc.p6 3 , .Xr pmc.tsc 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 .