From: Eric Dumazet <eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Ming Lei <tom.leiming-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: "Ben Hutchings"
<bhutchings-s/n/eUQHGBpZroRs9YW3xA@public.gmane.org>,
"Oliver Neukum" <oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>,
"Grant Grundler"
<grundler-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
"Freddy Xin" <freddy-knRN6Y/kmf1NUHwG+Fw1Kw@public.gmane.org>,
"David Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"ASIX Louis [蘇威陸]"
<louis-knRN6Y/kmf1NUHwG+Fw1Kw@public.gmane.org>,
"Allan Chou" <allan-knRN6Y/kmf1NUHwG+Fw1Kw@public.gmane.org>
Subject: Re: [PATCH 1/1] TX throttling bug-fixing patch of AX88179_178A
Date: Thu, 25 Jul 2013 08:11:28 -0700 [thread overview]
Message-ID: <1374765088.23313.21.camel@edumazet-glaptop> (raw)
In-Reply-To: <CACVXFVNre5SsJhaVqFNRcop7ahqxabWqHZkjBZccj1ZqOAUZ9A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Thu, 2013-07-25 at 22:52 +0800, Ming Lei wrote:
> Maybe need to try it with TSO enabled, in my test on ax88179_178a NIC after
> applying your disabling TSO patch, tx throughput is less than 600Mbps, but rx
> is close to 900Mbps.
It looks like TCP stack could for this case allocate linear skbs
(GFP_KERNEL context), using order-3 pages, and not adding frags on them,
to avoid the skb_linearize() hazard (in GFP_ATOMIC)
In case of retransmits, skb are small (one MSS) so the skb_linearize()
should succeed most of the time.
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next prev parent reply other threads:[~2013-07-25 15:11 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-20 9:16 [PATCH 1/1] TX throttling bug-fixing patch of AX88179_178A freddy
2013-07-22 17:07 ` Eric Dumazet
2013-07-22 17:11 ` Ben Hutchings
2013-07-22 18:29 ` Grant Grundler
2013-07-22 18:38 ` Ben Hutchings
2013-07-22 18:47 ` Eric Dumazet
2013-07-22 19:47 ` Ben Hutchings
[not found] ` <1374522471.1635.48.camel-/LGg1Z1CJKQ+9kgCwbf1HqK4ta4zdZpAajtMo4Cw6ucAvxtiuMwx3w@public.gmane.org>
2013-07-23 6:10 ` Eric Dumazet
2013-07-23 23:46 ` David Miller
2013-07-23 23:56 ` Eric Dumazet
2013-07-24 0:05 ` Eric Dumazet
2013-07-24 0:15 ` [PATCH] usbnet: do not pretend to support SG/TSO Eric Dumazet
2013-07-26 20:48 ` David Miller
2013-07-24 0:17 ` [PATCH 1/1] TX throttling bug-fixing patch of AX88179_178A David Miller
2013-07-24 2:29 ` Grant Grundler
[not found] ` <CANEJEGtLavwdPdq_Qojz_x-DQ3KXfZp0vPYr6imKtNxN0Hf_2Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-24 2:32 ` Grant Grundler
2013-07-25 2:28 ` Ming Lei
2013-07-25 5:10 ` Eric Dumazet
2013-07-25 5:25 ` Ming Lei
[not found] ` <CACVXFVNyFk0Zpi4tC0ENiq8RcrtrjYW-Dhs+A56+Pw4BKm8y8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-25 11:01 ` Eric Dumazet
2013-07-25 14:52 ` Ming Lei
2013-07-25 15:00 ` Ben Hutchings
[not found] ` <CACVXFVNre5SsJhaVqFNRcop7ahqxabWqHZkjBZccj1ZqOAUZ9A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-25 15:11 ` Eric Dumazet [this message]
2013-07-25 13:34 ` Ben Hutchings
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