AIX: Add partition stats

Signed-off-by: Johannes Ziemke <github@5pi.de>

collector/partition_aix.go

@@ -0,0 +1,118 @@
+// Copyright 2025 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !nopartition
+// +build !nopartition
+
+package collector
+
+import (
+	"log/slog"
+
+	"github.com/power-devops/perfstat"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type partitionCollector struct {
+	logger           *slog.Logger
+	entitledCapacity *prometheus.Desc
+	memoryMax        *prometheus.Desc
+	memoryOnline     *prometheus.Desc
+	cpuOnline        *prometheus.Desc
+	cpuSys           *prometheus.Desc
+	cpuPool          *prometheus.Desc
+	powerSaveMode    *prometheus.Desc
+	smtThreads       *prometheus.Desc
+}
+
+const (
+	partitionCollectorSubsystem = "partition"
+)
+
+func init() {
+	registerCollector("partition", defaultEnabled, NewPartitionCollector)
+}
+
+func NewPartitionCollector(logger *slog.Logger) (Collector, error) {
+	return &partitionCollector{
+		logger: logger,
+		entitledCapacity: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "entitled_capacity"),
+			"Entitled processor capacity of the partition in CPU units (e.g. 1.0 = one core).",
+			nil, nil,
+		),
+		memoryMax: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "memory_max"),
+			"Maximum memory of the partition in bytes.",
+			nil, nil,
+		),
+		memoryOnline: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "memory_online"),
+			"Online memory of the partition in bytes.",
+			nil, nil,
+		),
+		cpuOnline: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "cpus_online"),
+			"Number of online CPUs in the partition.",
+			nil, nil,
+		),
+		cpuSys: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "cpus_sys"),
+			"Number of physical CPUs in the system.",
+			nil, nil,
+		),
+		cpuPool: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "cpus_pool"),
+			"Number of physical CPUs in the pool.",
+			nil, nil,
+		),
+		powerSaveMode: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "power_save_mode"),
+			"Power save mode of the partition (1 for enabled, 0 for disabled).",
+			nil, nil,
+		),
+		smtThreads: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, partitionCollectorSubsystem, "smt_threads"),
+			"Number of SMT threads per core.",
+			nil, nil,
+		),
+	}, nil
+}
+
+func (c *partitionCollector) Update(ch chan<- prometheus.Metric) error {
+	stats, err := perfstat.PartitionStat()
+	if err != nil {
+		return err
+	}
+
+	powerSaveMode := 0.0
+	if stats.Conf.PowerSave {
+		powerSaveMode = 1.0
+	}
+
+	ch <- prometheus.MustNewConstMetric(c.entitledCapacity, prometheus.GaugeValue, float64(stats.EntCapacity)/100.0)
+
+	ch <- prometheus.MustNewConstMetric(c.memoryMax, prometheus.GaugeValue, float64(stats.Mem.Max)*1024*1024)
+	ch <- prometheus.MustNewConstMetric(c.memoryOnline, prometheus.GaugeValue, float64(stats.Mem.Online)*1024*1024)
+
+	ch <- prometheus.MustNewConstMetric(c.cpuOnline, prometheus.GaugeValue, float64(stats.VCpus.Online))
+
+	ch <- prometheus.MustNewConstMetric(c.cpuSys, prometheus.GaugeValue, float64(stats.NumProcessors.Online))
+
+	ch <- prometheus.MustNewConstMetric(c.cpuPool, prometheus.GaugeValue, float64(stats.ActiveCpusInPool))
+
+	ch <- prometheus.MustNewConstMetric(c.powerSaveMode, prometheus.GaugeValue, powerSaveMode)
+	ch <- prometheus.MustNewConstMetric(c.smtThreads, prometheus.GaugeValue, float64(stats.SmtThreads))
+
+	return nil
+}