wehub-resource-sync
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23 lines
620 B
Go
23 lines
620 B
Go
//go:build linux
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package platform
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import "golang.org/x/sys/unix"
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// HostPhysicalMemoryBytes returns total physical RAM in bytes via
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// sysinfo(2). Totalram is reported in units of Unit bytes; both fields are
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// widened to uint64 so the multiply is correct on 32-bit arches too.
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// Returns 0 when the syscall fails, so a caller that derives a budget from
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// it can fall back cleanly to "host RAM unknown".
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func HostPhysicalMemoryBytes() uint64 {
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var si unix.Sysinfo_t
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if err := unix.Sysinfo(&si); err != nil {
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return 0
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}
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unit := uint64(si.Unit)
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if unit == 0 {
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unit = 1
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}
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return uint64(si.Totalram) * unit
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}
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