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gloo/ibverbs: enable gpudirect with new nvidia drivers #438

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Merged
merged 1 commit into from
May 9, 2025
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gloo/ibverbs: enable gpudirect with new nvidia drivers #438

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11 changes: 10 additions & 1 deletion gloo/transport/ibverbs/device.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,15 @@ namespace gloo {
namespace transport {
namespace ibverbs {

namespace {
bool hasNvPeerMem() {
const auto& modules = kernelModules();
return modules.count("nv_peer_mem") > 0 ||
// Newer nvidia drivers use a different module name
modules.count("nvidia_peermem") > 0;
}
} // namespace

// Scope guard for ibverbs device list.
class IbvDevices {
public:
Expand Down Expand Up @@ -112,7 +121,7 @@ std::shared_ptr<::gloo::transport::Device> CreateDevice(
Device::Device(const struct attr& attr, ibv_context* context)
: attr_(attr),
pciBusID_(infinibandToBusID(attr.name)),
hasNvPeerMem_(kernelModules().count("nv_peer_mem") > 0),
hasNvPeerMem_(hasNvPeerMem()),
context_(context) {
int rv;

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