From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: netdev@vger.kernel.org, kaber@trash.net, hawk@diku.dk,
jarkao2@gmail.com, hadi@cyberus.ca
Subject: Re: [PATCH net-next-2.6] net_sched: move TCQ_F_THROTTLED flag
Date: Thu, 20 Jan 2011 16:56:42 -0800 (PST) [thread overview]
Message-ID: <20110120.165642.170095653.davem@davemloft.net> (raw)
In-Reply-To: <1295537236.2825.286.camel@edumazet-laptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 20 Jan 2011 16:27:16 +0100
> In commit 371121057607e (net: QDISC_STATE_RUNNING dont need atomic bit
> ops) I moved QDISC_STATE_RUNNING flag to __state container, located in
> the cache line containing qdisc lock and often dirtied fields.
>
> I now move TCQ_F_THROTTLED bit too, so that we let first cache line read
> mostly, and shared by all cpus. This should speedup HTB/CBQ for example.
>
> Not using test_bit()/__clear_bit()/__test_and_set_bit allows to use an
> "unsigned int" for __state container, reducing by 8 bytes Qdisc size.
>
> Introduce helpers to hide implementation details.
>
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Applied.
next prev parent reply other threads:[~2011-01-21 0:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 9:50 [PATCH net-next-2.6] net_sched: sfq: allow divisor to be a variable Eric Dumazet
2011-01-20 10:17 ` Eric Dumazet
2011-01-20 13:48 ` [PATCH net-next-2.6] net_sched: RCU conversion of stab Eric Dumazet
2011-01-20 15:01 ` Patrick McHardy
2011-01-20 16:39 ` Eric Dumazet
2011-01-20 15:27 ` [PATCH net-next-2.6] net_sched: move TCQ_F_THROTTLED flag Eric Dumazet
2011-01-21 0:56 ` David Miller [this message]
2011-01-21 11:04 ` [PATCH net-next-2.6] net_sched: TCQ_F_CAN_BYPASS generalization Eric Dumazet
2011-01-22 0:27 ` David Miller
2011-01-21 0:56 ` [PATCH net-next-2.6] net_sched: RCU conversion of stab David Miller
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