netdev - [net-next PATCH V2 0/3] Optimizing pktgen for single CPU performance

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Date:	Thu, 26 Jun 2014 13:16:17 +0200
From:	Jesper Dangaard Brouer <brouer@...hat.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:	Daniel Borkmann <dborkman@...hat.com>,
	Florian Westphal <fw@...len.de>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Thomas Graf <tgraf@...g.ch>,
	Eric Dumazet <eric.dumazet@...il.com>, zoltan.kiss@...rix.com,
	Alexander Duyck <alexander.h.duyck@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next PATCH V2 0/3] Optimizing pktgen for single CPU performance

This series focus on optimizing "pktgen" for single CPU performance.

V2-series:
 - Removed some patches
 - Doc real reason for TX ring buffer filling up

NIC tuning for pktgen:
 http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html

General overload setup according to:
 http://netoptimizer.blogspot.dk/2014/04/basic-tuning-for-network-overload.html

Hardware:
 System: CPU E5-2630
 NIC: Intel ixgbe/82599 chip

Testing done with net-next git tree on top of
 commit 6623b41944 ("Merge branch 'master' of...jkirsher/net-next")

Pktgen script exercising race condition:
 https://github.com/netoptimizer/network-testing/blob/master/pktgen/unit_test01_race_add_rem_device_loop.sh

Tool for measuring LOCK overhead:
 https://github.com/netoptimizer/network-testing/blob/master/src/overhead_cmpxchg.c

---

Jesper Dangaard Brouer (3):
      pktgen: RCU-ify "if_list" to remove lock in next_to_run()
      pktgen: avoid expensive set_current_state() call in loop
      pktgen: document tuning for max NIC performance


 Documentation/networking/pktgen.txt |   28 +++++++++
 net/core/pktgen.c                   |  110 ++++++++++++++++++-----------------
 2 files changed, 83 insertions(+), 55 deletions(-)

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