From: Peter Zijlstra <peterz@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [PATCH RFC v2] lib: Proportions with flexible period
Date: Tue, 01 May 2012 12:34:57 +0200 [thread overview]
Message-ID: <1335868497.13683.123.camel@twins> (raw)
In-Reply-To: <1335285033-7347-2-git-send-email-jack@suse.cz>
On Tue, 2012-04-24 at 18:30 +0200, Jan Kara wrote:
> Implement code computing proportions of events of different type (like code in
> lib/proportions.c) but allowing periods to have different lengths. This allows
> us to have aging periods of fixed wallclock time which gives better proportion
> estimates given the hugely varying throughput of different devices - previous
> measuring of aging period by number of events has the problem that a reasonable
> period length for a system with low-end USB stick is not a reasonable period
> length for a system with high-end storage array resulting either in too slow
> proportion updates or too fluctuating proportion updates.
OK, seems sound. Thanks!
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [PATCH RFC v2] lib: Proportions with flexible period
Date: Tue, 01 May 2012 12:34:57 +0200 [thread overview]
Message-ID: <1335868497.13683.123.camel@twins> (raw)
In-Reply-To: <1335285033-7347-2-git-send-email-jack@suse.cz>
On Tue, 2012-04-24 at 18:30 +0200, Jan Kara wrote:
> Implement code computing proportions of events of different type (like code in
> lib/proportions.c) but allowing periods to have different lengths. This allows
> us to have aging periods of fixed wallclock time which gives better proportion
> estimates given the hugely varying throughput of different devices - previous
> measuring of aging period by number of events has the problem that a reasonable
> period length for a system with low-end USB stick is not a reasonable period
> length for a system with high-end storage array resulting either in too slow
> proportion updates or too fluctuating proportion updates.
OK, seems sound. Thanks!
next prev parent reply other threads:[~2012-05-01 10:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-24 16:30 [PATCH RFC v2 0/1] Flexible proportions Jan Kara
2012-04-24 16:30 ` Jan Kara
2012-04-24 16:30 ` [PATCH RFC v2] lib: Proportions with flexible period Jan Kara
2012-04-24 16:30 ` Jan Kara
2012-05-01 10:34 ` Peter Zijlstra [this message]
2012-05-01 10:34 ` Peter Zijlstra
2012-04-25 2:10 ` [PATCH RFC v2 0/1] Flexible proportions Fengguang Wu
2012-04-25 2:10 ` Fengguang Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1335868497.13683.123.camel@twins \
--to=peterz@infradead.org \
--cc=fengguang.wu@intel.com \
--cc=jack@suse.cz \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.