vmxnet3: Use larger queues (512+512)

Author: fwsGonzo

src/drivers/vmxnet3.cpp

@@ -106,7 +106,7 @@ inline void mmio_write32(uintptr_t location, uint32_t value)
 
 vmxnet3::vmxnet3(hw::PCI_Device& d) :
     Link(Link_protocol{{this, &vmxnet3::transmit}, mac()},
-         2048, 2048 /* half-page buffer size */),
+         1024, 2048 /* half-page buffer size */),
     pcidev(d)
 {
   INFO("vmxnet3", "Driver initializing (rev=%#x)", d.rev_id());
@@ -330,8 +330,7 @@ void vmxnet3::refill(rxring_state& rxq)
   bool added_buffers = false;
   int  old_value = rxq.producers;
 
-  while (rxq.prod_count < VMXNET3_RX_FILL
-      && bufstore().available() != 0)
+  while (rxq.prod_count < VMXNET3_RX_FILL)
   {
     size_t i = rxq.producers % vmxnet3::NUM_RX_DESC;
     const uint32_t generation =

src/drivers/vmxnet3.hpp

@@ -30,8 +30,8 @@ class vmxnet3 : public net::Link_layer<net::Ethernet>
   using Link_protocol = Link::Protocol;
   static const int ETH_FRAME_LEN = 1514;
   static const int NUM_RX_QUEUES = 1;
-  static const int NUM_TX_DESC   = 128;
-  static const int NUM_RX_DESC   = 128;
+  static const int NUM_TX_DESC   = 256;
+  static const int NUM_RX_DESC   = 256;
 
   static std::unique_ptr<Nic> new_instance(hw::PCI_Device& d)
   { return std::make_unique<vmxnet3>(d); }