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From: "Luck, Tony" <tony.luck@intel.com>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [TECH TOPIC] Memory thrashing, was Re:  Self nomination
Date: Fri, 29 Jul 2016 09:26:03 -0700	[thread overview]
Message-ID: <20160729162603.GA12262@intel.com> (raw)
In-Reply-To: <20160729110724.GD2799@techsingularity.net>

On Fri, Jul 29, 2016 at 12:07:24PM +0100, Mel Gorman wrote:
> On Thu, Jul 28, 2016 at 02:55:23PM -0400, Johannes Weiner wrote:
> > On Mon, Jul 25, 2016 at 01:11:42PM -0400, Johannes Weiner wrote:

> > It might be useful to talk about
> > metrics. Could we quantify application progress?

The most reliable way to do that would be to have an actual
user mode program that runs, accessing some configurable number
of pages, periodically touching some file in /proc/sys/vm to
let the kernel know that some quantum of work had been completed.

Then the kernel would get accurate data on application progress
(at the cost of cpu time and memory consumed by this process, and
increased power usage when the system could otherwise be idle).

-Tony

  reply	other threads:[~2016-07-29 16:26 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-25 17:11 [Ksummit-discuss] Self nomination Johannes Weiner
2016-07-25 18:15 ` Rik van Riel
2016-07-26 10:56   ` Jan Kara
2016-07-26 13:10     ` Vlastimil Babka
2016-07-28 18:55 ` [Ksummit-discuss] [TECH TOPIC] Memory thrashing, was " Johannes Weiner
2016-07-28 21:41   ` James Bottomley
2016-08-01 15:46     ` Johannes Weiner
2016-08-01 16:06       ` James Bottomley
2016-08-01 16:11         ` Dave Hansen
2016-08-01 16:33           ` James Bottomley
2016-08-01 18:13             ` Rik van Riel
2016-08-01 19:51             ` Dave Hansen
2016-08-01 17:08           ` Johannes Weiner
2016-08-01 18:19             ` Johannes Weiner
2016-07-29  0:25   ` Rik van Riel
2016-07-29 11:07   ` Mel Gorman
2016-07-29 16:26     ` Luck, Tony [this message]
2016-08-01 15:17       ` Rik van Riel
2016-08-01 16:55     ` Johannes Weiner
2016-08-02  9:18   ` Jan Kara

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