mirror of
https://github.com/arehnman/yttrium-virtio-gpu.git
synced 2026-11-07 02:06:32 +00:00
junjiehua
00d2037945
Implemented a workaround for rx packet loss encountered with TCP_NODELAY. By default, this feature is turned off to minimize the impact on CPU performance and network bandwidth. To activate the feature, go to the network card properties and set the MinRxBufferPercent to a value above 0. A good starting point is to set MinRxBufferPercent to 25% and then monitor for any packet loss. If packet loss continues, incrementally adjust the value to 50%, then 75%, and if necessary, up to the maximum of 100%. In extreme cases, it may be required to not only adjust the MinRxBufferPercent but also to increase the number of queues and the size of each queue (queue_size). It is important to note that this feature is only applicable to rx packet loss. For more details, see [this thread](https://github.com/virtio-win/kvm-guest-drivers-windows/issues/1012). Signed-off-by: junjiehua <[email protected]>
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#pragma once
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#include "ParaNdis-VirtQueue.h"
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#include "ParaNdis-AbstractPath.h"
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class CParaNdisRX : public CParaNdisTemplatePath<CVirtQueue>, public CNdisAllocatable < CParaNdisRX, 'XRHR' > {
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public:
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CParaNdisRX();
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~CParaNdisRX();
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bool Create(PPARANDIS_ADAPTER Context, UINT DeviceQueueIndex);
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BOOLEAN AddRxBufferToQueue(pRxNetDescriptor pBufferDescriptor);
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void PopulateQueue();
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void FreeRxDescriptorsFromList();
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void ReuseReceiveBuffer(pRxNetDescriptor pBuffersDescriptor)
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{
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TPassiveSpinLocker autoLock(m_Lock);
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ReuseReceiveBufferNoLock(pBuffersDescriptor);
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}
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BOOLEAN IsRxBuffersShortage() { return m_NetNofReceiveBuffers < m_MinRxBufferLimit; }
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VOID ProcessRxRing(CCHAR nCurrCpuReceiveQueue);
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BOOLEAN RestartQueue();
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void Shutdown()
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{
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TPassiveSpinLocker autoLock(m_Lock);
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m_VirtQueue.Shutdown();
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m_Reinsert = false;
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}
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void KickRXRing();
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PARANDIS_RECEIVE_QUEUE &UnclassifiedPacketsQueue() { return m_UnclassifiedPacketsQueue; }
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private:
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/* list of Rx buffers available for data (under VIRTIO management) */
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LIST_ENTRY m_NetReceiveBuffers;
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UINT m_NetNofReceiveBuffers;
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UINT m_MinRxBufferLimit;
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UINT m_nReusedRxBuffersCounter, m_nReusedRxBuffersLimit = 0;
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bool m_Reinsert = true;
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PARANDIS_RECEIVE_QUEUE m_UnclassifiedPacketsQueue;
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void ReuseReceiveBufferNoLock(pRxNetDescriptor pBuffersDescriptor);
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private:
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int PrepareReceiveBuffers();
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pRxNetDescriptor CreateRxDescriptorOnInit();
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};
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#ifdef PARANDIS_SUPPORT_RSS
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VOID ParaNdis_ResetRxClassification(
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PARANDIS_ADAPTER *pContext);
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#endif
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