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Subject[PATCH net-next 2/3] net: mvpp2: adjust gso stop wake thresholds
Date
From: Yan Markman <ymarkman@marvell.com>

Adjust MVPP2_MAX_TSO_SEGS and stop_threshold/wake_threshold
for better TXQ utilization and performance.

Signed-off-by: Yan Markman <ymarkman@marvell.com>
---
drivers/net/ethernet/marvell/mvpp2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index 55300b1fe6c0..1a893ef70eab 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -498,7 +498,7 @@
* skb. As we need a maxium of two descriptors per fragments (1 header, 1 data),
* multiply this value by two to count the maximum number of skb descs needed.
*/
-#define MVPP2_MAX_TSO_SEGS 300
+#define MVPP2_MAX_TSO_SEGS 100
#define MVPP2_MAX_SKB_DESCS (MVPP2_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)

/* Dfault number of RXQs in use */
@@ -5810,7 +5810,7 @@ static int mvpp2_txq_init(struct mvpp2_port *port,
txq_pcpu->tso_headers = NULL;

txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS;
- txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2;
+ txq_pcpu->wake_threshold = txq_pcpu->stop_threshold - 100;

txq_pcpu->tso_headers =
dma_alloc_coherent(port->dev->dev.parent,
--
2.14.3
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