Fix SATA discovery, add NVLink bridge detection, add infiniband-diags
- storage: add jsonInt64 dual-format unmarshaler to handle lsblk output change in util-linux 2.38 (LOG-SEC/PHY-SEC now emitted as JSON integers, not quoted strings); fixes SATA disks invisible on Debian 12 - pcie: detect NVLink bridge mezzanine CX-7 cards (Mellanox x2, no host net ifaces, DeviceName contains "NVLINK" in lspci -v) and mark them with device_class="NVLinkBridge"; escalate PCIe link speed downgrade to Critical for these cards (Gen3 on a fixed internal connector = hardware fault, not a transient warning) - pcie: cross-reference nvidia-smi topo to capture NVLink bond counts and active status for all NVLink bridge cards - packages: add infiniband-diags to ISO; provides ibstat required by nvidia-fabricmanager-start.sh to enumerate IB devices before FM launch (absence causes CUDA_ERROR_SYSTEM_NOT_READY) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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@@ -0,0 +1,206 @@
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package collector
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import (
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"bee/audit/internal/schema"
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"log/slog"
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"os/exec"
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"regexp"
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"strconv"
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"strings"
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)
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var nv5re = regexp.MustCompile(`(?i)^NV(\d+)$`)
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// isNVLinkBridgeCandidate returns true for Mellanox PCIe devices that look like
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// NVLink bridge mezzanine cards: narrow link (x2), no host net interfaces.
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// These are the CPU-side PCIe control plane of the NVSwitch fabric on HGX/DGX systems.
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func isNVLinkBridgeCandidate(bdf string, dev schema.HardwarePCIeDevice) bool {
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if !isMellanoxDevice(dev) {
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return false
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}
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if dev.LinkWidth == nil || *dev.LinkWidth > 2 {
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return false
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}
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if len(netIfacesByBDF(bdf)) > 0 {
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return false
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}
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return true
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}
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// confirmNVLinkBridgeDeviceName checks if the lspci DeviceName for bdf contains
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// "NVLINK". This is a targeted single-device call, only executed for candidates
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// already pre-filtered by isNVLinkBridgeCandidate.
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func confirmNVLinkBridgeDeviceName(bdf string) bool {
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out, err := exec.Command("lspci", "-s", bdf, "-v").Output()
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if err != nil {
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return false
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}
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for _, line := range strings.Split(string(out), "\n") {
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if strings.Contains(strings.ToUpper(strings.TrimSpace(line)), "NVLINK") {
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return true
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}
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}
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return false
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}
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// markNVLinkBridge overwrites device_class and adds telemetry flags on a detected
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// NVLink bridge card. Must be called before applyPCIeLinkSpeedWarning so that the
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// correct severity (Critical) is applied.
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func markNVLinkBridge(dev *schema.HardwarePCIeDevice) {
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class := "NVLinkBridge"
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dev.DeviceClass = &class
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if dev.Telemetry == nil {
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dev.Telemetry = map[string]any{}
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}
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dev.Telemetry["nvlink_bridge"] = true
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}
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// enrichNVLinkBridgesWithGPUTopo cross-references NVLink bridge PCIe status with
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// the GPU-side NVLink topology reported by nvidia-smi. For each bridge device it
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// adds nvlink_topo_all_active and nvlink_topo_min_links to the telemetry, and
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// upgrades a degraded-link Warning to Critical when the fabric is also affected.
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func enrichNVLinkBridgesWithGPUTopo(devs []schema.HardwarePCIeDevice) []schema.HardwarePCIeDevice {
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hasBridge := false
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for _, d := range devs {
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if d.DeviceClass != nil && *d.DeviceClass == "NVLinkBridge" {
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hasBridge = true
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break
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}
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}
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if !hasBridge {
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return devs
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}
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topo, err := queryNVIDIANVLinkTopo()
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if err != nil {
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slog.Info("nvlink-bridge: nvidia-smi topo unavailable, skipping cross-reference", "err", err)
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return devs
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}
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for i := range devs {
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if devs[i].DeviceClass == nil || *devs[i].DeviceClass != "NVLinkBridge" {
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continue
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}
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if devs[i].Telemetry == nil {
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devs[i].Telemetry = map[string]any{}
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}
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devs[i].Telemetry["nvlink_topo_all_active"] = topo.AllActive
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devs[i].Telemetry["nvlink_topo_min_links"] = topo.MinNVLinks
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devs[i].Telemetry["nvlink_topo_gpu_count"] = topo.GPUCount
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// If the bridge PCIe is already degraded AND the fabric is also degraded
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// (missing NVLink connections), escalate to Critical.
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if devs[i].Status != nil && *devs[i].Status == statusCritical && !topo.AllActive {
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devs[i].Telemetry["nvlink_fabric_affected"] = true
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}
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}
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slog.Info("nvlink-bridge: topo cross-reference applied",
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"gpu_count", topo.GPUCount,
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"all_active", topo.AllActive,
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"min_links", topo.MinNVLinks,
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)
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return devs
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}
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// nvlinkTopoResult summarises the GPU NVLink connectivity matrix.
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type nvlinkTopoResult struct {
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GPUCount int
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AllActive bool // true if every GPU pair has at least one NVLink bond
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MinNVLinks int // minimum NVLink bonds seen across any GPU pair (0 = some pair disconnected)
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}
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// queryNVIDIANVLinkTopo runs nvidia-smi topo -m and parses the NVLink matrix.
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func queryNVIDIANVLinkTopo() (nvlinkTopoResult, error) {
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out, err := exec.Command("nvidia-smi", "topo", "-m").Output()
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if err != nil {
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return nvlinkTopoResult{}, err
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}
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return parseNVIDIATopologyMatrix(string(out)), nil
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}
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// parseNVIDIATopologyMatrix extracts the minimum NVLink bond count from the
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// nvidia-smi topo -m matrix.
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//
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// Format (abbreviated):
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//
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// GPU0 GPU1 ... NIC0 NIC1
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// GPU0 X NV18 ... NODE NODE
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// GPU1 NV18 X ... NODE NODE
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// NIC0 NODE NODE... X PIX
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//
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// The header row starts with "GPU0"; its columns may include non-GPU entries
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// (NIC, CPU) which are ignored. Only GPU×GPU cells containing NV# values are
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// counted. X is self; non-NV tokens (NODE, SYS, PHB, PIX) are skipped.
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func parseNVIDIATopologyMatrix(raw string) nvlinkTopoResult {
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lines := strings.Split(raw, "\n")
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// Locate the header line and record which column indices are GPU columns.
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headerIdx := -1
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var gpuColIndices []int // 0-based indices within fields (excluding the row label)
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var gpuCount int
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for i, line := range lines {
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trimmed := strings.TrimSpace(line)
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if strings.HasPrefix(trimmed, "GPU0") {
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parts := strings.Fields(trimmed)
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for j, col := range parts {
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if strings.HasPrefix(col, "GPU") {
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gpuColIndices = append(gpuColIndices, j)
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}
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}
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gpuCount = len(gpuColIndices)
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if gpuCount >= 2 {
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headerIdx = i
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}
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break
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}
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}
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if headerIdx < 0 || gpuCount == 0 {
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return nvlinkTopoResult{}
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}
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minLinks := -1 // -1 = no NV pair seen yet
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allActive := true
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for _, line := range lines[headerIdx+1:] {
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trimmed := strings.TrimSpace(line)
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if !strings.HasPrefix(trimmed, "GPU") {
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continue
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}
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cells := strings.Fields(trimmed)
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// cells[0] is the row label (e.g. "GPU0"); cells[1..] are column values.
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// gpuColIndices are 0-based within the header fields, so they map to
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// cells[idx+1] in the data rows (shift by 1 for the row label).
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for _, colIdx := range gpuColIndices {
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dataIdx := colIdx + 1
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if dataIdx >= len(cells) {
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continue
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}
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cell := cells[dataIdx]
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m := nv5re.FindStringSubmatch(cell)
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if len(m) != 2 {
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continue
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}
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n, err := strconv.Atoi(m[1])
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if err != nil {
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continue
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}
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if n == 0 {
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allActive = false
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}
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if minLinks < 0 || n < minLinks {
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minLinks = n
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}
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}
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}
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if minLinks < 0 {
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minLinks = 0
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}
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return nvlinkTopoResult{
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GPUCount: gpuCount,
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AllActive: allActive && minLinks > 0,
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MinNVLinks: minLinks,
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}
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}
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