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fix: handle no memory limit in coder stat mem #11107

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Merged
merged 4 commits into from
Dec 8, 2023
+34 −0
Merged

fix: handle no memory limit in coder stat mem #11107

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5651d85
fix: handle no memory limit in coder stat mem
f0ssel Dec 8, 2023
7bc56cf
handle unlimited differently
f0ssel Dec 8, 2023
d591a95
add test
f0ssel Dec 8, 2023
54de752
fix
f0ssel Dec 8, 2023
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30 changes: 27 additions & 3 deletions cli/clistat/cgroup.go
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,13 @@ const (
cgroupV2MemoryStat = "/sys/fs/cgroup/memory.stat"
)

const (
// 9223372036854771712 is the highest positive signed 64-bit integer (263-1),
// rounded down to multiples of 4096 (2^12), the most common page size on x86 systems.
// This is used by docker to indicate no memory limit.
UnlimitedMemory int64 = 9223372036854771712
)

// ContainerCPU returns the CPU usage of the container cgroup.
// This is calculated as difference of two samples of the
// CPU usage of the container cgroup.
Expand Down Expand Up @@ -219,12 +226,29 @@ func (s *Statter) ContainerMemory(p Prefix) (*Result, error) {
return nil, nil //nolint:nilnil
}

var (
r *Result
err error
)
if s.isCGroupV2() {
return s.cGroupV2Memory(p)
r, err = s.cGroupV2Memory(p)
if err != nil {
return nil, xerrors.Errorf("get cgroupv2 memory: %w", err)
}
} else {
// Fall back to CGroupv1
r, err = s.cGroupV1Memory(p)
if err != nil {
return nil, xerrors.Errorf("get cgroupv1 memory: %w", err)
}
}

// Fall back to CGroupv1
return s.cGroupV1Memory(p)
// If there is no memory limit set on the container use the host value.
if int64(*r.Total) == UnlimitedMemory {
return s.HostMemory(p)
}

return r, nil
}

func (s *Statter) cGroupV2Memory(p Prefix) (*Result, error) {
Expand Down