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Add comment and print units 

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
This commit is contained in:
Simon Pasquier 2018-07-26 10:26:58 +02:00
parent ba22b10113
commit 208d21a393
1 changed files with 9 additions and 6 deletions
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15
cmd/prometheus/limits_default.go
View File

@ -21,30 +21,33 @@ import (
"syscall"
)
// syscall.RLIM_INFINITY is a constant and its default type is int.
// It needs to be converted to an int64 variable to be compared with uint64 values.
// See https://golang.org/ref/spec#Conversions
var unlimited int64 = syscall.RLIM_INFINITY
func limitToString(v uint64) string {
func limitToString(v uint64, unit string) string {
if v == uint64(unlimited) {
return "unlimited"
}
return fmt.Sprintf("%d", v)
return fmt.Sprintf("%d%s", v, unit)
}
func getLimits(resource int) string {
func getLimits(resource int, unit string) string {
rlimit := syscall.Rlimit{}
err := syscall.Getrlimit(resource, &rlimit)
if err != nil {
log.Fatal("Error!")
}
return fmt.Sprintf("(soft=%s, hard=%s)", limitToString(rlimit.Cur), limitToString(rlimit.Max))
return fmt.Sprintf("(soft=%s, hard=%s)", limitToString(rlimit.Cur, unit), limitToString(rlimit.Max, unit))
}
// FdLimits returns the soft and hard limits for file descriptors.
func FdLimits() string {
return getLimits(syscall.RLIMIT_NOFILE)
return getLimits(syscall.RLIMIT_NOFILE, "")
}
// VmLimits returns the soft and hard limits for virtual memory.
func VmLimits() string {
return getLimits(syscall.RLIMIT_AS)
return getLimits(syscall.RLIMIT_AS, "b")
}