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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 ( var (
psiResources = []string{"cpu", "io", "memory"} psiResources = []string{"cpu", "io", "memory", "irq"}
) )
type pressureStatsCollector struct { type pressureStatsCollector struct {
@ -38,6 +38,7 @@ type pressureStatsCollector struct {
ioFull *prometheus.Desc ioFull *prometheus.Desc
mem *prometheus.Desc mem *prometheus.Desc
memFull *prometheus.Desc memFull *prometheus.Desc
irqFull *prometheus.Desc
fs procfs.FS 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", "Total time in seconds no process could make progress due to memory congestion",
nil, nil, 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, fs: fs,
logger: logger, logger: logger,
}, nil }, nil
@ -102,7 +108,9 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
} }
return fmt.Errorf("failed to retrieve pressure stats: %w", err) 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") level.Debug(c.logger).Log("msg", "pressure information returned no 'some' data")
return ErrNoData return ErrNoData
} }
@ -119,6 +127,8 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
case "memory": case "memory":
ch <- prometheus.MustNewConstMetric(c.mem, prometheus.CounterValue, float64(vals.Some.Total)/1000.0/1000.0) 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) 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: default:
level.Debug(c.logger).Log("msg", "did not account for resource", "resource", res) level.Debug(c.logger).Log("msg", "did not account for resource", "resource", res)
} }