From: John Fastabend <john.fastabend@gmail•com>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: xiyou.wangcong@gmail•com, jhs@mojatatu•com,
alexei.starovoitov@gmail•com, brouer@redhat•com,
john.r.fastabend@intel•com, netdev@vger•kernel.org,
davem@davemloft•net
Subject: Re: [RFC PATCH 08/13] net: sched: support skb_bad_tx with lockless qdisc
Date: Wed, 17 Aug 2016 16:00:51 -0700 [thread overview]
Message-ID: <57B4ECA3.7000208@gmail.com> (raw)
In-Reply-To: <1471474686.29842.53.camel@edumazet-glaptop3.roam.corp.google.com>
On 16-08-17 03:58 PM, Eric Dumazet wrote:
> On Wed, 2016-08-17 at 12:36 -0700, John Fastabend wrote:
>> Similar to how gso is handled skb_bad_tx needs to be per cpu to handle
>> lockless qdisc with multiple writer/producers.
> \
>> @@ -1021,6 +1026,7 @@ err_out4:
>> free_percpu(sch->cpu_bstats);
>> free_percpu(sch->cpu_qstats);
>> free_percpu(sch->gso_cpu_skb);
>> + free_percpu(sch->skb_bad_txq_cpu);
>
>
> This might be the time to group all these per cpu allocations to a
> single one, to help data locality and decrease overhead of having XX
> pointers.
>
>
>
Sounds like a good idea to me. I'll go ahead and add a patch to the
front to consolidate the stats and then add these there.
next prev parent reply other threads:[~2016-08-17 23:01 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-17 19:33 [RFC PATCH 00/13] Series short description John Fastabend
2016-08-17 19:33 ` [RFC PATCH 01/13] net: sched: allow qdiscs to handle locking John Fastabend
2016-08-17 22:33 ` Eric Dumazet
2016-08-17 22:49 ` John Fastabend
2016-08-17 22:34 ` Eric Dumazet
2016-08-17 22:48 ` John Fastabend
2016-08-17 19:34 ` [RFC PATCH 02/13] net: sched: qdisc_qlen for per cpu logic John Fastabend
2016-08-17 19:34 ` [RFC PATCH 03/13] net: sched: provide per cpu qstat helpers John Fastabend
2016-08-17 19:35 ` [RFC PATCH 04/13] net: sched: provide atomic qlen helpers for bypass case John Fastabend
2016-08-17 19:35 ` [RFC PATCH 05/13] net: sched: a dflt qdisc may be used with per cpu stats John Fastabend
2016-08-17 19:35 ` [RFC PATCH 06/13] net: sched: per cpu gso handlers John Fastabend
2016-08-17 19:36 ` [RFC PATCH 07/13] net: sched: support qdisc_reset on NOLOCK qdisc John Fastabend
2016-08-17 22:53 ` Eric Dumazet
2016-08-17 22:59 ` John Fastabend
2016-08-17 19:36 ` [RFC PATCH 08/13] net: sched: support skb_bad_tx with lockless qdisc John Fastabend
2016-08-17 22:58 ` Eric Dumazet
2016-08-17 23:00 ` John Fastabend [this message]
2016-08-23 20:11 ` John Fastabend
2016-08-17 19:37 ` [RFC PATCH 09/13] net: sched: helper to sum qlen John Fastabend
2016-08-17 19:37 ` [RFC PATCH 10/13] net: sched: lockless support for netif_schedule John Fastabend
2016-08-17 19:46 ` John Fastabend
2016-08-17 23:01 ` Eric Dumazet
2016-08-17 23:17 ` John Fastabend
2016-08-17 23:33 ` Eric Dumazet
2016-08-17 19:38 ` [RFC PATCH 11/13] net: sched: pfifo_fast use alf_queue John Fastabend
2016-08-19 10:13 ` Jesper Dangaard Brouer
2016-08-19 15:44 ` John Fastabend
2016-08-17 19:38 ` [RFC PATCH 12/13] net: sched: add support for TCQ_F_NOLOCK subqueues to sch_mq John Fastabend
2016-08-17 19:49 ` John Fastabend
2016-08-17 23:04 ` Eric Dumazet
2016-08-17 23:18 ` John Fastabend
2016-08-17 19:39 ` [RFC PATCH 13/13] net: sched: add support for TCQ_F_NOLOCK subqueues to sch_mqprio John Fastabend
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