freebsd-src/lib/libpmc/pmc.dmc-620.3
Mitchell Horne b293497146 pmc.amd(3): rename from pmc.k8(3)
This is the first step in recognizing that the K8 microarchitecture
represents a small and aged subset of AMD CPUs supported by this class.
Future changes will update the code and documentation details to better
reflect this.

Keep the old filename as an alias.

Reviewed by:	jkoshy
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D41279
2023-10-18 15:05:45 -03:00

162 lines
4.4 KiB
Groff

.\" Copyright (c) 2022 Ampere Computing.
.\"
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.Dd Jul 22, 2022
.Dt PMC.DMC-620 3
.Os
.Sh NAME
.Nm pmc.dmc-620
.Nd measure the
.Tn Arm
.Tn DMC-620
Dynamic Memory Controller performance counter events.
.Sh LIBRARY
.Lb libpmc
.Sh SYNOPSIS
.In pmc.h
.Sh DESCRIPTION
.Tn DMC-620
PMU counters may be configured to count any one of a defined set of hardware
events.
.Pp
.Tn Arm
.Tn CoreLink
.Tn DMC-620 Dynamic Memory Controller performance counters are documented in
.Rs
.%B "ARM CoreLink DMC-620 Dynamic Memory Controller Technical Reference Manual"
.%T "Revision: r0p0"
.%D 2017
.%Q "ARM Limited"
.Re
.Ss PMC Capabilities
.Tn DMC-620
PMU counters support the following capabilities:
.Bl -column "PMC_CAP_INTERRUPT" "Support"
.It Sy Capability Ta Em Support
.It PMC_CAP_CASCADE Ta \&No
.It PMC_CAP_EDGE Ta \&No
.It PMC_CAP_INTERRUPT Ta Yes
.It PMC_CAP_INVERT Ta Yes
.It PMC_CAP_READ Ta Yes
.It PMC_CAP_PRECISE Ta \&No
.It PMC_CAP_SYSTEM Ta Yes
.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 inc= Ns Ar value
Two-bit value that controls direction of count for PMC.
Behavior depend on selected event.
.It Li inv
Invert the sense of comparison.
.It Li match= Ns Ar value
Count only events matched by
.Ar value.
.It Li mask= Ns Ar qualifier
Allow to apply
.Ar qualifier
mask to compared
.Ar value .
.El
.Ss Class Name Prefix
These PMCs use a class name prefix of
.Dq Li DMC620_CD2_
or
.Dq Li DMC620_C_ .
.Ss Event Specifiers
The following PMC events are available:
.Bl -column
.It Sy clkdiv2_cycle_count
.It Sy clkdiv2_allocate
.It Sy clkdiv2_queue_depth
.It Sy clkdiv2_waiting_for_wr_data
.It Sy clkdiv2_read_backlog
.It Sy clkdiv2_waiting_for_mi
.It Sy clkdiv2_hazard_resolution
.It Sy clkdiv2_enqueue
.It Sy clkdiv2_arbitrate
.It Sy clkdiv2_lrank_turnaround_activate
.It Sy clkdiv2_prank_turnaround_activate
.It Sy clkdiv2_read_depth
.It Sy clkdiv2_write_depth
.It Sy clkdiv2_highhigh_qos_depth
.It Sy clkdiv2_high_qos_depth
.It Sy clkdiv2_medium_qos_depth
.It Sy clkdiv2_low_qos_depth
.It Sy clkdiv2_activate
.It Sy clkdiv2_rdwr
.It Sy clkdiv2_refresh
.It Sy clkdiv2_training_request
.It Sy clkdiv2_t_mac_tracker
.It Sy clkdiv2_bk_fsm_tracker
.It Sy clkdiv2_bk_open_tracker
.It Sy clkdiv2_ranks_in_pwr_down
.It Sy clkdiv2_ranks_in_sref
.It Sy clk_cycle_count
.It Sy clk_request
.It Sy clk_upload_stall
.El
.Sh SEE ALSO
.Xr pmc 3 ,
.Xr pmc.amd 3 ,
.Xr pmc.atom 3 ,
.Xr pmc.core 3 ,
.Xr pmc.core2 3 ,
.Xr pmc.corei7 3 ,
.Xr pmc.corei7uc 3 ,
.Xr pmc.iaf 3 ,
.Xr pmc.iaf 3 ,
.Xr pmc.soft 3 ,
.Xr pmc.tsc 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 .
.br
The
.Nm pmc.dmc-620
driver was added in
.Fx 14.0 .
.Sh AUTHORS
.An -nosplit
The
.Lb libpmc
library was written by
.An Joseph Koshy Aq Mt jkoshy@FreeBSD.org .
.An Oleksandr Rybalko Aq Mt ray@FreeBSD.org .
.br
The DMC-620 PMU driver was sponsored by Ampere Computing LLC.
This manual page was written by
.An Oleksandr Rybalko Aq Mt ray@FreeBSD.org .