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add IRQ PSI metrics

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Signed-off-by: mchtech <michu_an@126.com>
This commit is contained in:
mchtech 2024-06-11 10:31:42 +00:00 committed by Johannes 'fish' Ziemke
parent c0c1a8c572
commit fe5ffa916f
1 changed files with 12 additions and 2 deletions
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14
collector/pressure_linux.go
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@ -29,7 +29,7 @@ import (
)
var (
psiResources = []string{"cpu", "io", "memory"}
psiResources = []string{"cpu", "io", "memory", "irq"}
)
type pressureStatsCollector struct {
@ -38,6 +38,7 @@ type pressureStatsCollector struct {
ioFull *prometheus.Desc
mem *prometheus.Desc
memFull *prometheus.Desc
irqFull *prometheus.Desc
fs procfs.FS
@ -81,6 +82,11 @@ func NewPressureStatsCollector(logger log.Logger) (Collector, error) {
"Total time in seconds no process could make progress due to memory congestion",
nil, nil,
),
irqFull: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "pressure", "irq_stalled_seconds_total"),
"Total time in seconds no process could make progress due to IRQ congestion",
nil, nil,
),
fs: fs,
logger: logger,
}, nil
@ -102,7 +108,9 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
}
return fmt.Errorf("failed to retrieve pressure stats: %w", err)
}
if vals.Some == nil {
// IRQ pressure does not have 'some' data.
// See https://github.com/torvalds/linux/blob/v6.9/kernel/sched/psi.c#L1243
if vals.Some == nil && res != "irq" {
level.Debug(c.logger).Log("msg", "pressure information returned no 'some' data")
return ErrNoData
}
@ -119,6 +127,8 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
case "memory":
ch <- prometheus.MustNewConstMetric(c.mem, prometheus.CounterValue, float64(vals.Some.Total)/1000.0/1000.0)
ch <- prometheus.MustNewConstMetric(c.memFull, prometheus.CounterValue, float64(vals.Full.Total)/1000.0/1000.0)
case "irq":
ch <- prometheus.MustNewConstMetric(c.irqFull, prometheus.CounterValue, float64(vals.Full.Total)/1000.0/1000.0)
default:
level.Debug(c.logger).Log("msg", "did not account for resource", "resource", res)
}