From: Hagen Paul Pfeifer <hagen@jauu.net>
To: tsuna <tsunanet@gmail.com>
Cc: "H.K. Jerry Chu" <hkjerry.chu@gmail.com>,
David Miller <davem@davemloft.net>, <kuznet@ms2.inr.ac.ru>,
<pekkas@netcore.fi>, <jmorris@namei.org>,
<yoshfuji@linux-ipv6.org>, <kaber@trash.net>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tcp: Expose the initial RTO via a new sysctl.
Date: Tue, 31 May 2011 17:43:25 +0200 [thread overview]
Message-ID: <0328b2351e8e11a19301262842ef0491@localhost> (raw)
In-Reply-To: <BANLkTikuW7VF8AUPFYHYzGe7mXp5H_emjA@mail.gmail.com>
On Tue, 31 May 2011 08:28:18 -0700, tsuna <tsunanet@gmail.com> wrote:
> Sorry I meant a knob such as /proc/sys/net/ipv4/tcp_initrto.
That's the same! ;-)
>> The initRTO is the ideal candidate for a
>> per route knob. And happily you will solve 2) with the per route thing
>> too!
>
> You still need a knob for the default system-wide value, don't you?
Yes, try to re-read the emails. Sysctl is a no-go, with a per route
interface you have the ability to tune the values. Talk with Jerry once
again - he wrote that at Google they already have a patch for this. And
with a per route knob you can select a even smaller value for your local
network (e.g. datacenter) and a larger value for all other routes. It makes
sense to provide a knob for this on a route basis, not on a global sysctl
basis.
But once again: talk with Jerry - he has the expert knowledge!
Hagen
WARNING: multiple messages have this Message-ID (diff)
From: Hagen Paul Pfeifer <hagen@jauu.net>
To: tsuna <tsunanet@gmail.com>
Cc: "H.K. Jerry Chu" <hkjerry.chu@gmail.com>,
David Miller <davem@davemloft.net>, <kuznet@ms2.inr.ac.ru>,
<pekkas@netcore.fi>, <jmorris@namei.org>,
<yoshfuji@linux-ipv6.org>, <kaber@trash.net>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tcp: Expose the initial RTO via a new sysctl.
Date: Tue, 31 May 2011 17:43:25 +0200 [thread overview]
Message-ID: <0328b2351e8e11a19301262842ef0491@localhost> (raw)
In-Reply-To: <BANLkTikuW7VF8AUPFYHYzGe7mXp5H_emjA@mail.gmail.com>
On Tue, 31 May 2011 08:28:18 -0700, tsuna <tsunanet@gmail.com> wrote:
> Sorry I meant a knob such as /proc/sys/net/ipv4/tcp_initrto.
That's the same! ;-)
>> The initRTO is the ideal candidate for a
>> per route knob. And happily you will solve 2) with the per route thing
>> too!
>
> You still need a knob for the default system-wide value, don't you?
Yes, try to re-read the emails. Sysctl is a no-go, with a per route
interface you have the ability to tune the values. Talk with Jerry once
again - he wrote that at Google they already have a patch for this. And
with a per route knob you can select a even smaller value for your local
network (e.g. datacenter) and a larger value for all other routes. It makes
sense to provide a knob for this on a route basis, not on a global sysctl
basis.
But once again: talk with Jerry - he has the expert knowledge!
Hagen
next prev parent reply other threads:[~2011-05-31 15:43 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 7:40 [PATCH] tcp: Expose the initial RTO via a new sysctl Benoit Sigoure
2011-05-17 7:40 ` Benoit Sigoure
2011-05-17 8:01 ` Alexander Zimmermann
2011-05-17 8:34 ` Eric Dumazet
2011-05-17 8:07 ` Eric Dumazet
2011-05-17 11:02 ` Hagen Paul Pfeifer
2011-05-17 11:02 ` Hagen Paul Pfeifer
2011-05-17 12:20 ` Eric Dumazet
2011-05-18 10:43 ` Benoit Sigoure
2011-05-18 19:26 ` David Miller
2011-05-18 19:40 ` tsuna
2011-05-18 19:52 ` David Miller
2011-05-18 20:20 ` Hagen Paul Pfeifer
2011-05-18 20:23 ` David Miller
2011-05-18 20:27 ` Hagen Paul Pfeifer
2011-05-20 10:27 ` H.K. Jerry Chu
2011-05-20 11:00 ` Hagen Paul Pfeifer
2011-05-20 11:00 ` Hagen Paul Pfeifer
2011-05-20 12:37 ` Alan Cox
2011-05-21 0:06 ` H.K. Jerry Chu
2011-05-31 14:48 ` tsuna
2011-05-31 15:25 ` Hagen Paul Pfeifer
2011-05-31 15:25 ` Hagen Paul Pfeifer
2011-05-31 15:28 ` tsuna
2011-05-31 15:43 ` Hagen Paul Pfeifer [this message]
2011-05-31 15:43 ` Hagen Paul Pfeifer
2011-05-19 2:22 ` [PATCH] tcp: Implement a two-level initial RTO as per draft RFC 2988bis-02 Benoit Sigoure
2011-05-19 2:22 ` Benoit Sigoure
2011-05-19 2:36 ` David Miller
2011-05-19 3:56 ` tsuna
2011-05-19 4:14 ` David Miller
2011-05-19 4:33 ` tsuna
2011-05-19 5:46 ` David Miller
2011-05-19 6:36 ` [PATCH] tcp: Lower the initial RTO to 1s " Benoit Sigoure
2011-05-19 6:36 ` Benoit Sigoure
2011-05-19 17:42 ` Yuchung Cheng
2011-05-19 6:47 ` Benoit Sigoure
2011-05-19 6:47 ` Benoit Sigoure
2011-05-19 20:16 ` David Miller
2011-05-19 6:10 ` [PATCH] tcp: Implement a two-level initial RTO " Alexander Zimmermann
2011-05-19 6:25 ` tsuna
2011-05-19 6:36 ` Alexander Zimmermann
2011-05-19 6:42 ` tsuna
2011-05-19 6:52 ` Alexander Zimmermann
2011-05-19 7:07 ` tsuna
2011-05-19 8:02 ` Hagen Paul Pfeifer
2011-05-19 8:02 ` Hagen Paul Pfeifer
2011-05-19 16:40 ` tsuna
2011-05-19 16:55 ` Alexander Zimmermann
2011-05-19 17:11 ` tsuna
2011-05-19 19:27 ` David Miller
2011-05-19 20:30 ` tsuna
2011-05-20 2:01 ` [PATCH] tcp: Expose the initial RTO via a new sysctl H.K. Jerry Chu
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