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Commit bc3a290b authored by Eli Cohen's avatar Eli Cohen Committed by Roland Dreier
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IPoIB: Double default RX/TX ring sizes 



Increase IPoIB ring sizes to twice their original sizes (RX: 128->256,
TX: 64->128) to act as a shock absorber for high traffic peaks.  With
the current settings, we have seen cases that there are many calls to
netif_stop_queue(), which causes degradation in throughput.  Also,
larger receive buffer sizes help IPoIB in CM mode to avoid experiencing
RNR NAK conditions due to insufficient receive buffers at the SRQ.

Signed-off-by: default avatarEli Cohen <eli@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent e112373f

drivers/infiniband/ulp/ipoib/ipoib.h

+2 −2
Original line number Diff line number Diff line
@@ -70,8 +70,8 @@ enum { 
	IPOIB_CM_BUF_SIZE	  = IPOIB_CM_MTU  + IPOIB_ENCAP_LEN,

	IPOIB_CM_HEAD_SIZE	  = IPOIB_CM_BUF_SIZE % PAGE_SIZE,

	IPOIB_CM_RX_SG		  = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,

	IPOIB_RX_RING_SIZE	  = 128,

	IPOIB_TX_RING_SIZE	  = 64,

	IPOIB_RX_RING_SIZE	  = 256,

	IPOIB_TX_RING_SIZE	  = 128,

	IPOIB_MAX_QUEUE_SIZE	  = 8192,

	IPOIB_MIN_QUEUE_SIZE	  = 2,

	IPOIB_CM_MAX_CONN_QP	  = 4096,