From: Simon Wunderlich <sw@simonwunderlich.de>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org,
Sven Eckelmann <sven@narfation.org>,
Simon Wunderlich <sw@simonwunderlich.de>
Subject: [B.A.T.M.A.N.] [PATCH 5/5] batman-adv: Enable LockLess TX for softif
Date: Wed, 19 Sep 2018 14:32:38 +0200 [thread overview]
Message-ID: <20180919123238.23742-6-sw@simonwunderlich.de> (raw)
In-Reply-To: <20180919123238.23742-1-sw@simonwunderlich.de>
From: Sven Eckelmann <sven@narfation.org>
The batadv interfaces are virtual interfaces which just tunnel the traffic
over other ethernet compatible interfaces. It doesn't need serialization
during the tx phase and is using RCU for most of its internal
datastructures. Since it doesn't have actual queues which could be locked
independently, the throughput gets significantly reduced by the extra lock
in the core net code.
8 parallel TCP connections forwarded by an IPQ4019 based hardware over
5GHz could reach:
* without LLTX: 349 Mibit/s
* with LLTX: 563 Mibit/s
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
net/batman-adv/soft-interface.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index e121c59fc1fa..2c7d95727f90 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -1050,6 +1050,7 @@ static void batadv_softif_init_early(struct net_device *dev)
dev->needs_free_netdev = true;
dev->priv_destructor = batadv_softif_free;
dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
+ dev->features |= NETIF_F_LLTX;
dev->priv_flags |= IFF_NO_QUEUE;
/* can't call min_mtu, because the needed variables
--
2.11.0
next prev parent reply other threads:[~2018-09-19 12:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-19 12:32 [B.A.T.M.A.N.] [PATCH 0/5] pull request for net-next: batman-adv 2018-09-19 Simon Wunderlich
2018-09-19 12:32 ` [B.A.T.M.A.N.] [PATCH 1/5] batman-adv: Start new development cycle Simon Wunderlich
2018-09-19 12:32 ` [B.A.T.M.A.N.] [PATCH 2/5] batman-adv: Mark debugfs functionality as deprecated Simon Wunderlich
2018-09-19 12:32 ` [B.A.T.M.A.N.] [PATCH 3/5] batman-adv: Provide debug messages as trace events Simon Wunderlich
2018-09-19 12:32 ` [B.A.T.M.A.N.] [PATCH 4/5] batman-adv: Move OGM rebroadcast stats to orig_ifinfo Simon Wunderlich
2018-09-19 12:32 ` Simon Wunderlich [this message]
2018-09-19 16:47 ` [B.A.T.M.A.N.] a dumb question about batman Dave Taht
2018-09-20 6:37 ` Sven Eckelmann
2018-09-20 3:36 ` [B.A.T.M.A.N.] [PATCH 0/5] pull request for net-next: batman-adv 2018-09-19 David Miller
2018-09-21 16:51 ` [B.A.T.M.A.N.] Packaging BATMAN A. James Lewis
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