PMC.DMC-620(3)

NAME
pmc.dmc-620 - measure the Arm DMC-620 Dynamic Memory Controller performance counter events.

LIBRARY
libpmc

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 ARM CoreLink DMC-620 Dynamic Memory Controller Technical Reference Manual, Revision: r0p0, 2017, ARM Limited.

  PMC Capabilities
DMC-620 PMU counters support the following capabilities:
Capability | Support
PMC_CAP_CASCADE |
PMC_CAP_EDGE |
PMC_CAP_INTERRUPT | Yes
PMC_CAP_INVERT | Yes
PMC_CAP_READ | Yes
PMC_CAP_PRECISE |
PMC_CAP_SYSTEM | Yes
PMC_CAP_TAGGING |
PMC_CAP_THRESHOLD | Yes
PMC_CAP_USER |
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_queue_depth
clkdiv2_waiting_for_wr_data
clkdiv2_read_backlog
clkdiv2_waiting_for_mi
clkdiv2_hazard_resolution
clkdiv2_enqueue
clkdiv2_arbitrate
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.amd(3), pmc.atom(3), pmc.core(3), pmc.core2(3), pmc.corei7(3), pmc.corei7uc(3), pmc.iaf(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
-nosplit The libpmc 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>.