From: Eric Dumazet <eric.dumazet@gmail.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
David Miller <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>, Jesse Gross <jesse@nicira.com>
Subject: Re: [RFC] GRO scalability
Date: Mon, 08 Oct 2012 20:28:57 +0200 [thread overview]
Message-ID: <1349720937.21172.3573.camel@edumazet-glaptop> (raw)
In-Reply-To: <5073199F.6040408@hp.com>
On Mon, 2012-10-08 at 11:21 -0700, Rick Jones wrote:
> Did I then mis-interpret:
>
> > 2) Use a LRU list to eventually be able to 'flush' too old packets,
> > even if the napi never completes. Each time we process a new packet,
> > being a GRO candidate or not, we increment a napi->sequence, and we
> > flush the oldest packet in gro_lru_list if its own sequence is too
> > old.
>
> in your initial RFC email? Because I took that as flushing a given
> packet if N packets have come through since that packet was queued to
> await coalescing.
Yes, this was refined in the patch I sent.
Currently using jiffies, but my plan is trying to use get_cycles() or
ktime_get(), after some experiments, allowing cycles/ns resolution.
(One ktime_get() per napi batch seems OK)
next prev parent reply other threads:[~2012-10-08 18:29 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-27 12:48 [PATCH net-next 3/3] ipv4: gre: add GRO capability Eric Dumazet
2012-09-27 17:52 ` Jesse Gross
2012-09-27 18:08 ` Eric Dumazet
2012-09-27 18:19 ` Eric Dumazet
2012-09-27 22:03 ` Jesse Gross
2012-09-28 14:04 ` Eric Dumazet
2012-10-01 20:56 ` Jesse Gross
2012-10-05 14:52 ` [RFC] GRO scalability Eric Dumazet
2012-10-05 18:16 ` Rick Jones
2012-10-05 19:00 ` Eric Dumazet
2012-10-05 19:35 ` Rick Jones
2012-10-05 20:06 ` Eric Dumazet
2012-10-08 16:40 ` Rick Jones
2012-10-08 16:59 ` Eric Dumazet
2012-10-08 17:49 ` Rick Jones
2012-10-08 17:55 ` Eric Dumazet
2012-10-08 17:56 ` Eric Dumazet
2012-10-08 18:58 ` [RFC] napi: limit GRO latency Stephen Hemminger
2012-10-08 19:10 ` David Miller
2012-10-08 19:12 ` Stephen Hemminger
2012-10-08 19:30 ` Eric Dumazet
2012-10-08 19:40 ` Stephen Hemminger
2012-10-08 19:46 ` Eric Dumazet
2012-10-08 19:21 ` Eric Dumazet
2012-10-08 18:21 ` [RFC] GRO scalability Rick Jones
2012-10-08 18:28 ` Eric Dumazet [this message]
2012-10-06 4:11 ` Herbert Xu
2012-10-06 5:08 ` Eric Dumazet
2012-10-06 5:14 ` Herbert Xu
2012-10-06 6:22 ` Eric Dumazet
2012-10-06 7:00 ` Eric Dumazet
2012-10-06 10:56 ` Herbert Xu
2012-10-06 18:08 ` [PATCH] net: gro: selective flush of packets Eric Dumazet
2012-10-07 0:32 ` Herbert Xu
2012-10-07 5:29 ` Eric Dumazet
2012-10-08 7:39 ` Eric Dumazet
2012-10-08 16:42 ` Rick Jones
2012-10-08 17:10 ` Eric Dumazet
2012-10-08 18:52 ` David Miller
2012-09-27 22:03 ` [PATCH net-next 3/3] ipv4: gre: add GRO capability Jesse Gross
2012-10-01 21:04 ` David Miller
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