From: John Floren <slawmaster@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Inducing artificial latency
Date: Tue, 22 Jun 2010 14:53:57 +0000 [thread overview]
Message-ID: <AANLkTikTcwZUCGQPSHRr5zVeNfFxshtnuumlB0KhCrRf@mail.gmail.com> (raw)
In-Reply-To: <AANLkTil293gVoM5FUGOm4V8h5YtjUMUZXO7WlMttMIMJ@mail.gmail.com>
On Tue, Jun 15, 2010 at 10:14 PM, Gorka Guardiola <paurea@gmail.com> wrote:
> On Wed, Jun 16, 2010 at 12:07 AM, erik quanstrom <quanstro@quanstro.net> wrote:
>>> Last time I needed something similar, I just run a modified iostats.
>>
>> how does iostats add latency?
>>
>
> hence the modified.
>
Hi Gorka
Do you still have your modified iostats around? I'm really not sure
about the results I get from adding sleeps in the ip code--it takes
over twice as long to copy a 10M file between my two test machines
(supposed to have 14ms RTT latency added, ping seems to indicate this)
than it does to copy from a system running a non-modified kernel to
go.cs.bell-labs.com (14ms RTT). I'd like to try running the tests with
a different latency method.
Thanks
John
--
"With MPI, familiarity breeds contempt. Contempt and nausea. Contempt,
nausea, and fear. Contempt, nausea, fear, and .." -- Ron Minnich
next prev parent reply other threads:[~2010-06-22 14:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-15 21:29 John Floren
2010-06-15 21:39 ` Jorden M
2010-06-15 22:06 ` Enrique Soriano
2010-06-15 21:39 ` erik quanstrom
2010-06-15 21:53 ` David Leimbach
2010-06-15 21:59 ` erik quanstrom
2010-06-15 21:45 ` Devon H. O'Dell
2010-06-15 22:43 ` John Floren
2010-06-15 23:01 ` Devon H. O'Dell
2010-06-16 19:04 ` John Floren
2010-06-16 22:15 ` Francisco J Ballesteros
2010-06-16 22:31 ` erik quanstrom
2010-06-16 22:58 ` EBo
2010-06-16 23:43 ` Bakul Shah
2010-06-17 0:10 ` erik quanstrom
2010-06-17 2:02 ` Bakul Shah
2010-06-17 3:32 ` erik quanstrom
2010-06-15 21:58 ` Gorka Guardiola
2010-06-15 22:07 ` erik quanstrom
2010-06-15 22:14 ` Gorka Guardiola
2010-06-22 14:53 ` John Floren [this message]
2010-06-22 15:03 ` John Floren
2010-06-16 5:20 ` Skip Tavakkolian
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