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Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers [message #43770 is a reply to message #43769]

Thu, 13 October 2011 20:08

davem
Messages: 463
Registered: February 2006

Senior Member

From: Glauber Costa <glommer@parallels.com>
Date: Fri, 14 Oct 2011 00:05:58 +0400

> On 10/14/2011 12:00 AM, David Miller wrote:
>> That imposes a new non-trivial cost, in fast paths, even when people
>> do not use your feature.
> Well, there is a cost, but all past submissions included round trip
> benchmarks.
> In none of them I could see any significant slowdown.

Did you try millions of sockets doing all kinds of different accesses?

Did you check the nanosecond latency of operations over loopback so
that the real cost of you change can be isolated and thus measured
properly?

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[Message index]

		[PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 1/8] Basic kernel memory functionality for the Memory Controller By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 2/8] socket: initial cgroup code. By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 7/8] Display current tcp memory allocation in kmem cgroup By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 6/8] tcp buffer limitation: per-cgroup limit By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 4/8] per-cgroup tcp buffers control By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 8/8] Disable task moving when using kernel memory accounting By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 5/8] per-netns ipv4 sysctl_tcp_mem By: Glauber Costa on Thu, 13 October 2011 13:09
		[PATCH v7 3/8] foundations of per-cgroup memory pressure controlling. By: Glauber Costa on Thu, 13 October 2011 13:09
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Thu, 13 October 2011 20:00
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Glauber Costa on Thu, 13 October 2011 20:05
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Thu, 13 October 2011 20:08
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Thu, 13 October 2011 20:12
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Glauber Costa on Thu, 13 October 2011 20:14
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Thu, 13 October 2011 20:18
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Glauber Costa on Fri, 14 October 2011 12:56
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Wed, 19 October 2011 21:09
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: davem on Thu, 13 October 2011 20:16
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Glauber Costa on Thu, 13 October 2011 20:23
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Valdis.Kletnieks on Fri, 14 October 2011 02:55
		Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers By: Andi Kleen on Fri, 14 October 2011 02:12

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