linux-kernel - kmem accounting netperf data

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <xr937gplwkcn.fsf@gthelen.mtv.corp.google.com>
Date:	Fri, 16 Nov 2012 09:03:52 -0800
From:	Greg Thelen <gthelen@...gle.com>
To:	glommer@...allels.com
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: kmem accounting netperf data

We ran some netperf comparisons measuring the overhead of enabling
CONFIG_MEMCG_KMEM with a kmem limit.  Short answer: no regression seen.

This is a multiple machine (client,server) netperf test.  Both client
and server machines were running the same kernel with the same
configuration.

A baseline run (with CONFIG_MEMCG_KMEM unset) was compared with a full
featured run (CONFIG_MEMCG_KMEM=y and a kmem limit large enough not to
put additional pressure on the workload).  We saw no noticeable
regression running:
- TCP_CRR efficiency, latency
- TCP_RR latency, rate
- TCP_STREAM efficiency, throughput
- UDP_RR efficiency, latency
The tests were run with a varying number of concurrent connections
(between 1 and 200).

The source came from one of Glauber's branches
(git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg
kmemcg-slab):
  commit 70506dcf756aaafd92f4a34752d6b8d8ff4ed360
  Author: Glauber Costa <glommer@...allels.com>
  Date:   Thu Aug 16 17:16:21 2012 +0400

      Add slab-specific documentation about the kmem controller

It's not the latest source, but I figured the data might still be
useful.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/