[hyperv] Increase TX ring size

Empirical observation suggests that 32 is a sensible size to minimise the number of deferred packet transmissions without overflowing the VMBus transmit ring buffer. Signed-off-by: Michael Brown <mcb30@ipxe.org>
ipxe · Dec 20, 2014 · a69c995 · a69c995
1 parent 4e68216
commit a69c995
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/drivers/net/netvsc.h b/src/drivers/net/netvsc.h
@@ -24,7 +24,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
  * must be sufficiently small to guarantee that we never run out of
  * space in the VMBus outbound ring buffer.
  */
-#define NETVSC_TX_NUM_DESC 8
+#define NETVSC_TX_NUM_DESC 32
 
 /** RX data buffer page set ID
  *