# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
#
# Copyright (c) 2025, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public
# License v2 as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 021110-1307, USA.
#

bpftune PMDA
============

This PMDA exports information about bpftune-controlled tunables;
these are mostly sysctl values.

Metrics
=======
Metrics exported are dynamic and based upon the bpftune tuners
loaded; information is gathered from bpftune via a query

bpftune -q jstatus

Installation
============

 + Ensure that bpftune is installed and running

 + # cd $PCP_PMDAS_DIR/bpftune

 + Check there is no clash in the Performance Metrics domain
   defined in ./domain.h.  If there is edit ./domain.h to
   choose another number

 + Then run

   # sudo ./Install

De-installation
===============

# cd $PCP_PMDAS_DIR/bpftune
# sudo ./Remove

Troubleshooting
===============
 + Ensure bpftune is running

 + Ensure bpftune -q jstatus returns valid json

