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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | INSTALLATION | USAGE | FILES | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
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PMDAROCESTAT(1) General Commands Manual PMDAROCESTAT(1)
pmdarocestat - Performance Metrics Domain Agent (PMDA) for RoCE
devices
$PCP_PMDAS_DIR/rocestat/pmdarocestat
The Rocestat PMDA (Performance Metrics Domain Agent) is a
Performance Co-Pilot (PCP) module that collects and exports
performance statistics for RDMA over Converged Ethernet (RoCE)
devices. It provides insights into network performance, error
conditions, and congestion events, aiding in the diagnosis and
monitoring of RoCE-based communication.
This PMDA reports software-aggregated InfiniBand port statistics,
including received/transmitted bytes and packets, link errors, and
congestion-related drops, helping to identify potential
bottlenecks and failures. Additionally, it includes hardware-
level counters, which track low-level transmission metrics,
duplicate requests, NAKs, and physical/constraint errors, offering
a deeper view into the underlying transport reliability and
efficiency.
Furthermore, Rocestat PMDA collects priority-based lane metrics
from ethtool -S <interface>, filtering statistics related to
priority lanes in RoCE traffic. These metrics provide visibility
into traffic distribution across lanes, helping diagnose
congestion hotspots and optimize workload balancing across
different lanes
By integrating Rocestat PMDA into a PCP monitoring environment,
users can efficiently analyze RoCE network behavior, detect
performance anomalies, and optimize high-speed RDMA workloads in
data center and HPC environments.
To install the Rocestat PMDA, follow these steps:
# cd $PCP_PMDAS_DIR/rocestat
# ./Install
To verify that the PMDA is running:
$ pminfo -t rocestat
To query Rocestat metrics, use the following command:
$ pminfo rocestat
To retrieve specific metric values:
$ pmval rocestat.hw.rcv.port_rcv_packets
$PCP_PMDAS_DIR/rocestat/Install
Installation script for Rocestat PMDA.
$PCP_PMDAS_DIR/rocestat/Remove
Uninstallation script.
$PCP_LOG_DIR/pmcd/rocestat.log
Log file for Rocestat PMDA events and errors.
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values for
these variables. The $PCP_CONF variable may be used to specify an
alternative configuration file, as described in pcp.conf(5).
PCPIntro(1), pmcd(1), pminfo(1) and PMDA(3).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2025-08-11.
(At that time, the date of the most recent commit that was found
in the repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot PCP PMDAROCESTAT(1)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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