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authorEric Dumazet <edumazet@google.com>2013-06-13 07:58:30 -0700
committerDavid S. Miller <davem@davemloft.net>2013-06-13 17:17:02 -0700
commitca4ec90b31d1ecf01087c607933cf792057bc8bf (patch)
treef629cdb10f0eafc1b1979daf34698db1d90a08fb /tools/virtio
parent5f121b9a83b499a61ed44e5ba619c7de8f7271ad (diff)
htb: reorder struct htb_class fields for performance
htb_class structures are big, and source of false sharing on SMP. By carefully splitting them in two parts, we can improve performance. I got 9 % performance increase on a 24 threads machine, with 200 concurrent netperf in TCP_RR mode, using a HTB hierarchy of 4 classes. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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