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PMC.DMC-620(3) FreeBSD Library Functions Manual PMC.DMC-620(3)
NAME
pmc.dmc-620 - measure the Arm DMC-620 Dynamic Memory Controller
performance counter events.
LIBRARY
Performance Counters Library (libpmc, -lpmc)
SYNOPSIS
#include <pmc.h>
DESCRIPTION
DMC-620 PMU counters may be configured to count any one of a defined set
of hardware events.
Arm CoreLink DMC-620 Dynamic Memory Controller performance counters are
documented in Revision: r0p0, ARM CoreLink DMC-620 Dynamic Memory
Controller Technical Reference Manual, ARM Limited, 2017.
PMC Capabilities
DMC-620 PMU counters support the following capabilities:
Capability Support
PMC_CAP_CASCADE No
PMC_CAP_EDGE No
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 No
PMC_CAP_WRITE Yes
Event Qualifiers
Event specifiers for these PMCs support the following common qualifiers:
inc=value
Two-bit value that controls direction of count for PMC. Behavior
depend on selected event.
inv Invert the sense of comparison.
match=value
Count only events matched by value.
mask=qualifier
Allow to apply qualifier mask to compared value.
Class Name Prefix
These PMCs use a class name prefix of "DMC620_CD2_" or "DMC620_C_".
Event Specifiers
The following PMC events are available:
clkdiv2_cycle_count
clkdiv2_allocate
clkdiv2_lrank_turnaround_activate
clkdiv2_prank_turnaround_activate
clkdiv2_read_depth
clkdiv2_write_depth
clkdiv2_highhigh_qos_depth
clkdiv2_high_qos_depth
clkdiv2_medium_qos_depth
clkdiv2_low_qos_depth
clkdiv2_activate
clkdiv2_rdwr
clkdiv2_refresh
clkdiv2_training_request
clkdiv2_t_mac_tracker
clkdiv2_bk_fsm_tracker
clkdiv2_bk_open_tracker
clkdiv2_ranks_in_pwr_down
clkdiv2_ranks_in_sref
clk_cycle_count
clk_request
clk_upload_stall
SEE ALSO
pmc(3), pmc.atom(3), pmc.core(3), pmc.core2(3), pmc.corei7(3),
pmc.corei7uc(3), pmc.iaf(3), pmc.iaf(3), pmc.k7(3), pmc.k8(3),
pmc.soft(3), pmc.tsc(3), pmc.westmere(3), pmc.westmereuc(3),
pmc_cpuinfo(3), pmclog(3), hwpmc(4)
HISTORY
The pmc library first appeared in FreeBSD 6.0.
The pmc.dmc-620 driver was added in FreeBSD 14.0.
AUTHORS
The Performance Counters Library (libpmc, -lpmc) library was written by
Joseph Koshy <jkoshy@FreeBSD.org>. Oleksandr Rybalko <ray@FreeBSD.org>.
The DMC-620 PMU driver was sponsored by Ampere Computing LLC. This
manual page was written by Oleksandr Rybalko <ray@FreeBSD.org>.
FreeBSD 14.0-RELEASE-p6 July 22, 2022 FreeBSD 14.0-RELEASE-p6