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use NVML to get pcie bandwidth utilization

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Note: this might differ slightly from XNVCtrl reported values, eg.
nvidia-settings
This commit is contained in:
Jussi Kuokkanen 2023-10-04 15:51:04 +03:00
parent d3dc4a9ee5
commit 23b82e125f
1 changed files with 35 additions and 0 deletions
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35
src/plugins/Nvidia.cpp
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@ -409,6 +409,40 @@ std::vector<TreeNode<DeviceNode>> getMemoryUtilization(NvidiaGPUData data) {
return {};
}
std::vector<TreeNode<DeviceNode>> getPcieUtilization(NvidiaGPUData data) {
uint linkSpeed, linkWidth;
auto widthRet = nvmlDeviceGetCurrPcieLinkWidth(data.devHandle, &linkWidth);
auto speedRet = nvmlDeviceGetPcieSpeed(data.devHandle, &linkSpeed);
if (speedRet != NVML_SUCCESS || widthRet != NVML_SUCCESS)
return {};
auto func = [=]() -> ReadResult{
uint rx, tx;
auto rxret = nvmlDeviceGetPcieThroughput(data.devHandle, NVML_PCIE_UTIL_RX_BYTES, &rx);
auto txret = nvmlDeviceGetPcieThroughput(data.devHandle, NVML_PCIE_UTIL_TX_BYTES, &tx);
if (txret == NVML_SUCCESS && rxret == NVML_SUCCESS) {
auto totalMBs = (rx + tx) / 1000;
auto maxMBs = (linkSpeed / 8) * linkWidth;
auto percentage =
(static_cast<double>(totalMBs) / static_cast<double>(maxMBs)) * 100;
// We could display this more granularly now, but is that really needed?
return static_cast<uint>(round(percentage));
}
return ReadError::UnknownError;
};
DynamicReadable dr{func, "%"};
if (hasReadableValue(func()))
return {DeviceNode{
.name = "PCIe Bandwidth Utilization",
.interface = dr,
.hash = md5(data.uuid + "PCIe Bandwidth Utilization"),
}};
return {};
}
std::vector<TreeNode<DeviceNode>> getPowerUsage(NvidiaGPUData data) {
auto func = [data]() -> ReadResult{
uint value;
@ -645,6 +679,7 @@ std::vector<TreeNode<DeviceNode>> getUtilizationsRoot(NvidiaGPUData data) {
auto gpuTree = TreeConstructor<NvidiaGPUData, DeviceNode>{
getGPUName, {
{getUtilizationsRoot, {
{getPcieUtilization, {}},
{getCoreUtilization, {}},
{getMemoryUtilization, {}},
}},