linux-kernel - Re: [tbench regression fixes]: digging out smelly deadmen.

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

Message-Id: <1225099757.9642.2.camel@marge.simson.net>
Date:	Mon, 27 Oct 2008 10:29:17 +0100
From:	Mike Galbraith <efault@....de>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	David Miller <davem@...emloft.net>, rjw@...k.pl,
	Ingo Molnar <mingo@...e.hu>, s0mbre@...rvice.net.ru,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [tbench regression fixes]: digging out smelly deadmen.

On Sun, 2008-10-26 at 20:03 +0100, Jiri Kosina wrote:
> On Sun, 26 Oct 2008, Andrew Morton wrote:
> 
> > > > > 208.4 MB/sec  -- vanilla 2.6.16.60
> > > > > 201.6 MB/sec  -- vanilla 2.6.20.1
> > > > > 172.9 MB/sec  -- vanilla 2.6.22.19
> > > > > 74.2 MB/sec   -- vanilla 2.6.23
> > > > >  46.1 MB/sec  -- vanilla 2.6.24.2
> > > > >  30.6 MB/sec  -- vanilla 2.6.26.1
> > > > > I.e. huge drop for 2.6.23 (this was with default configs for each 
> > > > > respective kernel).
> > Was this when we decreased the default value of
> > /proc/sys/vm/dirty_ratio, perhaps?  dbench is sensitive to that.
> 
> 2.6.28 gives 41.8 MB/s with /proc/sys/vm/dirty_ratio == 50. So small 
> improvement, but still far far away from the throughput of pre-2.6.23 
> kernels.

How many clients?

dbench 160 -t 60

2.6.28-smp (git.today)
Throughput 331.718 MB/sec 160 procs (no logjam)
Throughput 309.85 MB/sec 160 procs (contains logjam)
Throughput 392.746 MB/sec 160 procs (contains logjam)

	-Mike

--
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/