Reviewed by: pauamma Sponsored By: Ampere Computing Differential Revision: https://reviews.freebsd.org/D32669
166 lines
4.4 KiB
Groff
166 lines
4.4 KiB
Groff
.\" Copyright (c) 2022 Ampere Computing.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd Jul 22, 2022
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.Dt PMC.DMC-620 3
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.Os
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.Sh NAME
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.Nm pmc.dmc-620
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.Nd measure the
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.Tn Arm
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.Tn DMC-620
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Dynamic Memory Controller performance counter events.
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.Sh LIBRARY
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.Lb libpmc
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.Sh SYNOPSIS
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.In pmc.h
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.Sh DESCRIPTION
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.Tn DMC-620
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PMU counters may be configured to count any one of a defined set of hardware
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events.
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.Pp
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.Tn Arm
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.Tn CoreLink
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.Tn DMC-620 Dynamic Memory Controller performance counters are documented in
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.Rs
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.%B "ARM CoreLink DMC-620 Dynamic Memory Controller Technical Reference Manual"
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.%T "Revision: r0p0"
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.%D 2017
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.%Q "ARM Limited"
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.Re
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.Ss PMC Capabilities
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.Tn DMC-620
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PMU counters support the following capabilities:
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.Bl -column "PMC_CAP_INTERRUPT" "Support"
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.It Sy Capability Ta Em Support
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.It PMC_CAP_CASCADE Ta \&No
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.It PMC_CAP_EDGE Ta \&No
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.It PMC_CAP_INTERRUPT Ta Yes
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.It PMC_CAP_INVERT Ta Yes
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.It PMC_CAP_READ Ta Yes
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.It PMC_CAP_PRECISE Ta \&No
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.It PMC_CAP_SYSTEM Ta Yes
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.It PMC_CAP_TAGGING Ta \&No
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.It PMC_CAP_THRESHOLD Ta Yes
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.It PMC_CAP_USER Ta \&No
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.It PMC_CAP_WRITE Ta Yes
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.El
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.Ss Event Qualifiers
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Event specifiers for these PMCs support the following common
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qualifiers:
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.Bl -tag -width indent
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.It Li inc= Ns Ar value
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Two-bit value that controls direction of count for PMC.
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Behavior depend on selected event.
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.It Li inv
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Invert the sense of comparison.
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.It Li match= Ns Ar value
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Count only events matched by
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.Ar value.
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.It Li mask= Ns Ar qualifier
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Allow to apply
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.Ar qualifier
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mask to compared
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.Ar value .
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.El
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.Ss Class Name Prefix
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These PMCs use a class name prefix of
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.Dq Li DMC620_CD2_
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or
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.Dq Li DMC620_C_ .
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.Ss Event Specifiers
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The following PMC events are available:
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.Bl -column
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.It Sy clkdiv2_cycle_count
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.It Sy clkdiv2_allocate
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.It Sy clkdiv2_queue_depth
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.It Sy clkdiv2_waiting_for_wr_data
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.It Sy clkdiv2_read_backlog
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.It Sy clkdiv2_waiting_for_mi
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.It Sy clkdiv2_hazard_resolution
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.It Sy clkdiv2_enqueue
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.It Sy clkdiv2_arbitrate
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.It Sy clkdiv2_lrank_turnaround_activate
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.It Sy clkdiv2_prank_turnaround_activate
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.It Sy clkdiv2_read_depth
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.It Sy clkdiv2_write_depth
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.It Sy clkdiv2_highhigh_qos_depth
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.It Sy clkdiv2_high_qos_depth
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.It Sy clkdiv2_medium_qos_depth
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.It Sy clkdiv2_low_qos_depth
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.It Sy clkdiv2_activate
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.It Sy clkdiv2_rdwr
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.It Sy clkdiv2_refresh
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.It Sy clkdiv2_training_request
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.It Sy clkdiv2_t_mac_tracker
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.It Sy clkdiv2_bk_fsm_tracker
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.It Sy clkdiv2_bk_open_tracker
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.It Sy clkdiv2_ranks_in_pwr_down
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.It Sy clkdiv2_ranks_in_sref
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.It Sy clk_cycle_count
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.It Sy clk_request
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.It Sy clk_upload_stall
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.El
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.Sh SEE ALSO
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.Xr pmc 3 ,
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.Xr pmc.atom 3 ,
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.Xr pmc.core 3 ,
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.Xr pmc.core2 3 ,
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.Xr pmc.corei7 3 ,
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.Xr pmc.corei7uc 3 ,
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.Xr pmc.iaf 3 ,
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.Xr pmc.iaf 3 ,
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.Xr pmc.k7 3 ,
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.Xr pmc.k8 3 ,
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.Xr pmc.p4 3 ,
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.Xr pmc.p5 3 ,
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.Xr pmc.p6 3 ,
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.Xr pmc.soft 3 ,
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.Xr pmc.tsc 3 ,
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.Xr pmc.westmere 3 ,
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.Xr pmc.westmereuc 3 ,
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.Xr pmc_cpuinfo 3 ,
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.Xr pmclog 3 ,
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.Xr hwpmc 4
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.Sh HISTORY
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The
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.Nm pmc
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library first appeared in
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.Fx 6.0 .
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.br
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The
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.Nm pmc.dmc-620
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driver was added in
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.Fx 14.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Lb libpmc
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library was written by
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.An Joseph Koshy Aq Mt jkoshy@FreeBSD.org .
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.An Oleksandr Rybalko Aq Mt ray@FreeBSD.org .
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.br
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The DMC-620 PMU driver was sponsored by Ampere Computing LLC.
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This manual page was written by
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.An Oleksandr Rybalko Aq Mt ray@FreeBSD.org .
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