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8b52204baa
Make sure that image events are written *after* execution. Fixes: #10812 Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
31 lines
631 B
Go
31 lines
631 B
Go
// +build linux
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package sysinfo
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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// NUMANodeCount queries the system for the count of Memory Nodes available
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// for use to this process.
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func NUMANodeCount() int {
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MPOL_F_MEMS_ALLOWED := (1 << 2)
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var mask [1024 / 64]uintptr
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_, _, err := unix.RawSyscall6(unix.SYS_GET_MEMPOLICY, 0, uintptr(unsafe.Pointer(&mask[0])), uintptr(len(mask)*8), 0, uintptr(MPOL_F_MEMS_ALLOWED), 0)
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if err != 0 {
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return 0
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}
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// For every available thread a bit is set in the mask.
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nmem := 0
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for _, e := range mask {
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if e == 0 {
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continue
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}
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nmem += int(popcnt(uint64(e)))
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}
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return nmem
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}
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