Co-authored-by: Ben Kochie <superq@gmail.com> Signed-off-by: Nobuhiro MIKI <nmiki@yahoo-corp.jp>pull/2426/head
Nobuhiro MIKI
3 years ago
committed by
Johannes 'fish' Ziemke
parent
69a3f73a9b
commit
3ed95908d6
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slabinfo - version: 2.1 |
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# name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail> |
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tw_sock_TCP 704 864 256 32 2 : tunables 0 0 0 : slabdata 27 27 0 |
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dmaengine-unmap-128 1206 1320 1088 30 8 : tunables 0 0 0 : slabdata 44 44 0 |
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kmalloc-8192 132 148 8192 4 8 : tunables 0 0 0 : slabdata 37 37 0 |
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kmem_cache 320 320 256 32 2 : tunables 0 0 0 : slabdata 10 10 0 |
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@ -0,0 +1,121 @@ |
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// Copyright 2022 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build linux && !noslabinfo
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// +build linux,!noslabinfo
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package collector |
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import ( |
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"fmt" |
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"github.com/go-kit/log" |
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"github.com/prometheus/client_golang/prometheus" |
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"github.com/prometheus/procfs" |
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) |
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type slabinfoCollector struct { |
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fs procfs.FS |
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logger log.Logger |
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subsystem string |
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labels []string |
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} |
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func init() { |
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registerCollector("slabinfo", defaultDisabled, NewSlabinfoCollector) |
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} |
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func NewSlabinfoCollector(logger log.Logger) (Collector, error) { |
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fs, err := procfs.NewFS(*procPath) |
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if err != nil { |
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return nil, fmt.Errorf("failed to open procfs: %w", err) |
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} |
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return &slabinfoCollector{logger: logger, |
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fs: fs, |
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subsystem: "slabinfo", |
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labels: []string{"slab"}, |
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}, nil |
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} |
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func (c *slabinfoCollector) Update(ch chan<- prometheus.Metric) error { |
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slabinfo, err := c.fs.SlabInfo() |
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if err != nil { |
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return fmt.Errorf("couldn't get %s: %w", c.subsystem, err) |
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} |
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for _, slab := range slabinfo.Slabs { |
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ch <- c.activeObjects(slab.Name, slab.ObjActive) |
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ch <- c.objects(slab.Name, slab.ObjNum) |
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ch <- c.objectSizeBytes(slab.Name, slab.ObjSize) |
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ch <- c.objectsPerSlab(slab.Name, slab.ObjPerSlab) |
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ch <- c.pagesPerSlab(slab.Name, slab.PagesPerSlab) |
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} |
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return nil |
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} |
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func (c *slabinfoCollector) activeObjects(label string, val int64) prometheus.Metric { |
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desc := prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, c.subsystem, "active_objects"), |
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"The number of objects that are currently active (i.e., in use).", |
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c.labels, nil) |
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return prometheus.MustNewConstMetric( |
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desc, prometheus.GaugeValue, float64(val), label, |
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) |
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} |
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func (c *slabinfoCollector) objects(label string, val int64) prometheus.Metric { |
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desc := prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, c.subsystem, "objects"), |
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"The total number of allocated objects (i.e., objects that are both in use and not in use).", |
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c.labels, nil) |
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return prometheus.MustNewConstMetric( |
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desc, prometheus.GaugeValue, float64(val), label, |
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) |
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} |
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func (c *slabinfoCollector) objectSizeBytes(label string, val int64) prometheus.Metric { |
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desc := prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, c.subsystem, "object_size_bytes"), |
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"The size of objects in this slab, in bytes.", |
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c.labels, nil) |
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return prometheus.MustNewConstMetric( |
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desc, prometheus.GaugeValue, float64(val), label, |
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) |
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} |
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func (c *slabinfoCollector) objectsPerSlab(label string, val int64) prometheus.Metric { |
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desc := prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, c.subsystem, "objects_per_slab"), |
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"The number of objects stored in each slab.", |
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c.labels, nil) |
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return prometheus.MustNewConstMetric( |
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desc, prometheus.GaugeValue, float64(val), label, |
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) |
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} |
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func (c *slabinfoCollector) pagesPerSlab(label string, val int64) prometheus.Metric { |
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desc := prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, c.subsystem, "pages_per_slab"), |
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"The number of pages allocated for each slab.", |
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c.labels, nil) |
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return prometheus.MustNewConstMetric( |
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desc, prometheus.GaugeValue, float64(val), label, |
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) |
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} |
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