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authorEric Dumazet <dada1@cosmosbay.com>2005-09-27 18:23:16 -0400
committerDavid S. Miller <davem@davemloft.net>2005-09-27 18:23:16 -0400
commit9356b8fc07dc126cd91d2b12f314d760ab48996e (patch)
tree908b193442d0e2ad345c05547d227809bc162a0a /net/core
parent2d7ceece08ad940d0ceac98ab1b5a3b82dfc2a0a (diff)
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing between multiple CPU accessing the device. - One part is mostly used on receive path (including eth_type_trans()) (poll_list, poll, quota, weight, last_rx, dev_addr, broadcast) - One part is mostly used on queue transmit path (qdisc) (queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len) - One part is mostly used on xmit path (device) (xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start) 'features' is placed outside of these hot points, in a location that may be shared by all cpus (because mostly read) name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name() Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
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