[dpdk-stable] patch 'examples/l3fwd-power: fix Rx descriptor size' has been queued to stable release 17.02.1

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 9197638e34b06d4153b0a0ee5f992f231b8ea935 Mon Sep 17 00:00:00 2001
From: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Date: Wed, 26 Apr 2017 12:29:52 +0100
Subject: [PATCH] examples/l3fwd-power: fix Rx descriptor size

[ upstream commit 4175729d012914e1c10e5f54e5a59169be020124 ]

L3fwd power app monitors the RX queues to see if the polling frequency
should be adjusted (the busier the queue, the higher the frequency).
The app uses several thresholds in the ring to determine the frequency,
being 96 the highest one, when frequency should be highest.

The problem is that the difference between this value and the ring size
is not big enough (128 - 96 = 32 descriptors), which means that
if the descriptors are not replenished quick enough, queue might
not be busy, but the app would think that it is, because 96th descriptor
is set.

Therefore, by increasing this gap (increasing the RX ring size),
we make sure that this false measurement will not happen.

Fixes: b451aa39db31 ("examples/l3fwd-power: use DD bit rather than RX queue count")

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>
---
 examples/l3fwd-power/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index 52aa5d3..2a52a2d 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -147,7 +147,7 @@
 /*
  * Configurable number of RX/TX ring descriptors
  */
-#define RTE_TEST_RX_DESC_DEFAULT 128
+#define RTE_TEST_RX_DESC_DEFAULT 512
 #define RTE_TEST_TX_DESC_DEFAULT 512
 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
 static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
-- 
1.9.0