[ena] Increase receive fill level

Experiments suggest that at least some instance types (observed with
c6i.large in eu-west-2) experience high packet drop rates with only 16
receive buffers allocated.  Increase the fill level to 32 buffers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/drivers/net/ena.h b/src/drivers/net/ena.h
index cfdee5e52a8b7218d22a4730bd7de5738f87ceb8..b1150d1a0835c760ce32322be303bccebcf67529 100644 (file)
--- a/src/drivers/net/ena.h
+++ b/src/drivers/net/ena.h
@@ -40,7 +40,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #define ENA_RX_COUNT 128
 
 /** Receive queue maximum fill level */
-#define ENA_RX_FILL 16
+#define ENA_RX_FILL 32
 
 /** Base address low register offset */
 #define ENA_BASE_LO 0x0