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fix(pcie): verify GPU links under real bandwidth load

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This commit is contained in:
Mikhail Chusavitin
2026-09-03 10:23:39 +03:00
parent 642e68631d
commit 347bc8310a
27 changed files with 384 additions and 902 deletions
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audit/internal/webui/page_validate.go
+8 -20
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@@ -189,11 +189,11 @@ func renderValidateMode(opts HandlerOptions, stressDefault bool) string {
`<code>all_reduce_perf</code> (NCCL tests)`,
validateFmtDur(platform.SATEstimatedNvidiaInterconnectSec)+` (all GPUs simultaneously, requires ≥2).`,
)) +
renderSATCard("nvidia-bandwidth", "NVIDIA Bandwidth (NVBandwidth)", "runNvidiaFabricValidate('nvidia-bandwidth')", "", renderValidateCardBody(
renderSATCard("nvidia-bandwidth", "NVIDIA Bandwidth + PCIe Link", "runNvidiaFabricValidate('nvidia-bandwidth')", "", renderValidateCardBody(
inv.NVIDIA,
`Validates GPU memory copy and peer-to-peer bandwidth paths using NVBandwidth.`,
`<code>nvbandwidth</code>`,
validateFmtDur(platform.SATEstimatedNvidiaBandwidthSec)+` (all GPUs simultaneously; nvbandwidth runs all built-in tests without a time limit — duration set by the tool).`,
`Validates GPU memory copy and peer-to-peer bandwidth paths, then samples each GPU's negotiated PCIe speed and width immediately after real traffic. Idle or forced-retrain Gen1 readings do not fail the test.`,
`<code>dcgmi diag -r nvbandwidth</code>, sysfs PCIe link attributes`,
validateFmtDur(platform.SATEstimatedNvidiaBandwidthSec)+` (all GPUs simultaneously; nvbandwidth runs all built-in tests without a time limit - duration set by the tool).`,
)) +
`</div>
<div class="grid3" style="margin-top:16px">
@@ -669,18 +669,6 @@ func renderCheck(opts HandlerOptions) string {
`<code>nvidia-smi --query-gpu=...</code>, <code>nvidia-smi topo -m</code>, <code>nvidia-smi nvlink -s/-e</code>, <code>nvidia-smi conf-compute -q</code>, <code>dmesg</code>`,
`Seconds — read-only query only.`,
)) +
renderSATCard("pcie-link", "PCIe Link Check", "runSAT('pcie-link')", "", renderValidateCardBody(
`Every enabled PCIe device in the machine (GPUs, NICs, RAID/HBA controllers, PCIe switches).`,
`Forces every enabled PCIe device to retrain its link (PCIe spec Link Control "Retrain Link" bit) and compares the negotiated speed against the device's own maximum. An idle sysfs reading alone can't tell a real degraded slot/riser from a device that's simply power-managed down at idle (GPUs do this routinely); a forced retrain settles that without needing a device-specific load generator, so this one check covers non-GPU PCIe hardware too, not just GPUs.`,
`<code>setpci</code> (Link Control/Link Status registers), <code>lspci</code>`,
`Seconds per device — brief link retrain, no sustained traffic.`,
)) +
renderSATCard("nvidia-pcie-bandwidth", "GPU PCIe Bandwidth", "runSAT('nvidia-pcie-bandwidth')", "", renderValidateCardBody(
inv.NVIDIA,
`Drives real host&lt;-&gt;device traffic across each GPU's PCIe link and resamples link speed immediately after, to confirm the link actually trains to its negotiated maximum under real load — the load-bearing counterpart to PCIe Link Check for GPUs specifically.`,
`<code>dcgmi diag -r nvbandwidth</code>, sysfs link-speed resample`,
`Depends on nvbandwidth's built-in test duration.`,
)) +
`</div>
<div style="height:1px;background:var(--border);margin:16px 0"></div>
<div class="card" style="margin-bottom:16px">
@@ -711,10 +699,10 @@ func renderCheck(opts HandlerOptions) string {
`<code>all_reduce_perf</code> (NCCL tests)`,
validateFmtDur(platform.SATEstimatedNvidiaInterconnectSec)+` (all GPUs simultaneously, requires ≥2).`,
)) +
renderSATCard("nvidia-bandwidth", "NVIDIA Bandwidth (NVBandwidth)", "runNvidiaFabricValidate('nvidia-bandwidth')", "", renderValidateCardBody(
renderSATCard("nvidia-bandwidth", "NVIDIA Bandwidth + PCIe Link", "runNvidiaFabricValidate('nvidia-bandwidth')", "", renderValidateCardBody(
inv.NVIDIA,
`Validates GPU memory copy and peer-to-peer bandwidth paths using NVBandwidth.`,
`<code>nvbandwidth</code>`,
`Validates GPU memory copy and peer-to-peer bandwidth paths, then samples each GPU's negotiated PCIe speed and width immediately after real traffic.`,
`<code>dcgmi diag -r nvbandwidth</code>, sysfs PCIe link attributes`,
validateFmtDur(platform.SATEstimatedNvidiaBandwidthSec)+` (all GPUs simultaneously).`,
)) +
`</div>
@@ -742,7 +730,7 @@ func renderCheck(opts HandlerOptions) string {
<script>
let satES = null;
function satLabels() {
return {nvidia:'Check GPU (DCGM L2)', 'nvidia-interconnect':'NVIDIA Interconnect (NCCL)', 'nvidia-bandwidth':'NVIDIA Bandwidth (NVBandwidth)', memory:'Check Memory', storage:'Check Storage', tpm:'Check TPM (read-only)', cpu:'Check CPU', amd:'Check AMD GPU', 'amd-mem':'AMD GPU MEM Integrity', 'amd-bandwidth':'AMD GPU MEM Bandwidth', 'nvidia-config':'Check GPU Config & NVLink', 'pcie-link':'PCIe Link Check', 'nvidia-pcie-bandwidth':'GPU PCIe Bandwidth Check'};
return {nvidia:'Check GPU (DCGM L2)', 'nvidia-interconnect':'NVIDIA Interconnect (NCCL)', 'nvidia-bandwidth':'NVIDIA Bandwidth + PCIe Link Under Load', memory:'Check Memory', storage:'Check Storage', tpm:'Check TPM (read-only)', cpu:'Check CPU', amd:'Check AMD GPU', 'amd-mem':'AMD GPU MEM Integrity', 'amd-bandwidth':'AMD GPU MEM Bandwidth', 'nvidia-config':'Check GPU Config & NVLink'};
}
let satNvidiaGPUsPromise = null;
function loadSatNvidiaGPUs() {