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Co-authored-by: Ben Kochie <superq@gmail.com> Signed-off-by: Nobuhiro MIKI <nmiki@yahoo-corp.jp>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| slabinfo - version: 2.1 | ||
| # name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail> | ||
| tw_sock_TCP 704 864 256 32 2 : tunables 0 0 0 : slabdata 27 27 0 | ||
| dmaengine-unmap-128 1206 1320 1088 30 8 : tunables 0 0 0 : slabdata 44 44 0 | ||
| kmalloc-8192 132 148 8192 4 8 : tunables 0 0 0 : slabdata 37 37 0 | ||
| kmem_cache 320 320 256 32 2 : tunables 0 0 0 : slabdata 10 10 0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| // Copyright 2022 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 linux && !noslabinfo | ||
| // +build linux,!noslabinfo | ||
|
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| package collector | ||
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| import ( | ||
| "fmt" | ||
|
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| "github.com/go-kit/log" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/procfs" | ||
| ) | ||
|
|
||
| type slabinfoCollector struct { | ||
| fs procfs.FS | ||
| logger log.Logger | ||
| subsystem string | ||
| labels []string | ||
| } | ||
|
|
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| func init() { | ||
| registerCollector("slabinfo", defaultDisabled, NewSlabinfoCollector) | ||
| } | ||
|
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| func NewSlabinfoCollector(logger log.Logger) (Collector, error) { | ||
| fs, err := procfs.NewFS(*procPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to open procfs: %w", err) | ||
| } | ||
|
|
||
| return &slabinfoCollector{logger: logger, | ||
| fs: fs, | ||
| subsystem: "slabinfo", | ||
| labels: []string{"slab"}, | ||
| }, nil | ||
| } | ||
|
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| func (c *slabinfoCollector) Update(ch chan<- prometheus.Metric) error { | ||
| slabinfo, err := c.fs.SlabInfo() | ||
| if err != nil { | ||
| return fmt.Errorf("couldn't get %s: %w", c.subsystem, err) | ||
| } | ||
|
|
||
| for _, slab := range slabinfo.Slabs { | ||
| ch <- c.activeObjects(slab.Name, slab.ObjActive) | ||
| ch <- c.objects(slab.Name, slab.ObjNum) | ||
| ch <- c.objectSizeBytes(slab.Name, slab.ObjSize) | ||
| ch <- c.objectsPerSlab(slab.Name, slab.ObjPerSlab) | ||
| ch <- c.pagesPerSlab(slab.Name, slab.PagesPerSlab) | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
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| func (c *slabinfoCollector) activeObjects(label string, val int64) prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, c.subsystem, "active_objects"), | ||
| "The number of objects that are currently active (i.e., in use).", | ||
| c.labels, nil) | ||
|
|
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| return prometheus.MustNewConstMetric( | ||
| desc, prometheus.GaugeValue, float64(val), label, | ||
| ) | ||
| } | ||
|
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| func (c *slabinfoCollector) objects(label string, val int64) prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, c.subsystem, "objects"), | ||
| "The total number of allocated objects (i.e., objects that are both in use and not in use).", | ||
| c.labels, nil) | ||
|
|
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| return prometheus.MustNewConstMetric( | ||
| desc, prometheus.GaugeValue, float64(val), label, | ||
| ) | ||
| } | ||
|
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| func (c *slabinfoCollector) objectSizeBytes(label string, val int64) prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, c.subsystem, "object_size_bytes"), | ||
| "The size of objects in this slab, in bytes.", | ||
| c.labels, nil) | ||
|
|
||
| return prometheus.MustNewConstMetric( | ||
| desc, prometheus.GaugeValue, float64(val), label, | ||
| ) | ||
| } | ||
|
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| func (c *slabinfoCollector) objectsPerSlab(label string, val int64) prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, c.subsystem, "objects_per_slab"), | ||
| "The number of objects stored in each slab.", | ||
| c.labels, nil) | ||
|
|
||
| return prometheus.MustNewConstMetric( | ||
| desc, prometheus.GaugeValue, float64(val), label, | ||
| ) | ||
| } | ||
|
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| func (c *slabinfoCollector) pagesPerSlab(label string, val int64) prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, c.subsystem, "pages_per_slab"), | ||
| "The number of pages allocated for each slab.", | ||
| c.labels, nil) | ||
|
|
||
| return prometheus.MustNewConstMetric( | ||
| desc, prometheus.GaugeValue, float64(val), label, | ||
| ) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -38,6 +38,7 @@ enabled_collectors=$(cat << COLLECTORS | |
| rapl | ||
| schedstat | ||
| selinux | ||
| slabinfo | ||
| sockstat | ||
| stat | ||
| thermal_zone | ||
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