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Update cpu collector for OpenBSD 6.4 (#1094) 

Starting with (not yet released) OpenBSD 6.4, sysctl KERN_CPTIME2 will
return ENODEV for offline CPUs.

SMT siblings are reported as offline when hw.smt is disabled, which is
the default since one of the later Spectre variants. So this might
affect a few systems.

For more details see:
https://cvsweb.openbsd.org/src/sys/kern/kern_sysctl.c#rev1.348

Signed-off-by: Ralf Horstmann <ralf+github@ackstorm.de>
This commit is contained in:
Ralf Horstmann 2018-10-02 10:21:30 +02:00 committed by Ben Kochie
parent 5a461d261c
commit 9f820bd3ee
2 changed files with 5 additions and 2 deletions
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1
CHANGELOG.md
View File

@ -24,6 +24,7 @@ Darwin meminfo metrics have been renamed to match Prometheus conventions. #1060
* [BUGFIX] Handle vanishing PIDs #1043
* [BUGFIX] Correctly cast Darwin memory info #1060
* [BUGFIX] Filter systemd units in Go for compatibility with older versions #1083
* [BUGFIX] Update cpu collector for OpenBSD 6.4
## 0.16.0 / 2018-05-15

6
collector/cpu_openbsd.go
View File

@ -59,10 +59,12 @@ func (c *cpuCollector) Update(ch chan<- prometheus.Metric) (err error) {
var cp_time [][C.CPUSTATES]C.int64_t
for i := 0; i < int(ncpus); i++ {
cp_timeb, err := unix.SysctlRaw("kern.cp_time2", i)
if err != nil {
if err != nil && err != unix.ENODEV {
return err
}
cp_time = append(cp_time, *(*[C.CPUSTATES]C.int64_t)(unsafe.Pointer(&cp_timeb[0])))
if err != unix.ENODEV {
cp_time = append(cp_time, *(*[C.CPUSTATES]C.int64_t)(unsafe.Pointer(&cp_timeb[0])))
}
}
for cpu, time := range cp_time {