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Fix nsdperf RDMA async poll rebuild #18

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Fix nsdperf RDMA async poll rebuild #18

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6 changes: 6 additions & 0 deletions nsdperf.C
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Original file line number Diff line number Diff line change
Expand Up @@ -8153,6 +8153,11 @@ int RdmaAsync::threadBody()
// If device table size changes, rebuild the poll list
if (rdmaDevTab.size() != lastDevCount)
{
// The async fd is non-blocking; stale duplicate entries can make one
// event look readable more than once and turn the second drain into EAGAIN.
rdevList.clear();
fdList.clear();

rdevList.reserve(rdmaDevTab.size());
fdList.reserve(rdmaDevTab.size());
pfd.events = POLLIN;
Expand All @@ -8176,6 +8181,7 @@ int RdmaAsync::threadBody()
rdevList.push_back(NULL);
pfd.fd = asyncSocks[0];
fdList.push_back(pfd);
lastDevCount = rdmaDevTab.size();
}

// Poll for an event on one of the RDMA devices
Expand Down