linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ingo Molnar <mingo@elte.hu>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Lameter <clameter@engr.sgi.com>,
	linux-kernel@vger.kernel.org, akpm@osdl.org, george@mvista.com,
	johnstul@us.ibm.com, paulmck@us.ibm.com
Subject: Re: [ANNOUNCE] ktimers subsystem
Date: Tue, 20 Sep 2005 09:14:01 +0200	[thread overview]
Message-ID: <20050920071401.GB14285@elte.hu> (raw)
In-Reply-To: <1127171542.24044.301.camel@tglx.tec.linutronix.de>


* Thomas Gleixner <tglx@linutronix.de> wrote:

> > Applications call gettimeofday for a variety of reasons. One is because it 
> > is widely available over different platformsn and application want to 
> > schedule things, need timestamps etc etc.
> 
> Accepted. But I still doubt that the number of calls to gettimeofday 
> is in anyway justified. The question I'm asking if it is really worth 
> a long and epic discussion about a single add instruction ?

it is absolutely and emphatically not worth it.

even in a hypothetical scenario [which this patchset is _not_ analogous 
to] where a new, clean subsystem introduces significant overhead, but 
the old subsystem is unclean, we frequently go with the new one - 
because it's so much easier to speed up something that is clean, robust 
and well-designed, than something that has been cobbled together!

	Ingo

  reply	other threads:[~2005-09-20  8:37 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-09-19 16:48 [ANNOUNCE] ktimers subsystem tglx
2005-09-19 16:48 ` [PATCH] " tglx
2005-09-19 21:47 ` [ANNOUNCE] " Thomas Gleixner
2005-09-19 22:03 ` Christoph Lameter
2005-09-19 22:17   ` Thomas Gleixner
2005-09-19 22:24     ` Christoph Lameter
2005-09-19 22:44       ` Thomas Gleixner
2005-09-19 22:50         ` john stultz
2005-09-19 22:58           ` Thomas Gleixner
2005-09-19 23:04         ` Christoph Lameter
2005-09-19 23:12           ` Thomas Gleixner
2005-09-20  7:14             ` Ingo Molnar [this message]
2005-09-20  7:10       ` Ingo Molnar
2005-09-21 19:24       ` Pavel Machek
2005-09-19 22:39     ` Christopher Friesen
2005-09-19 22:54       ` Thomas Gleixner
2005-09-20  4:57         ` Christopher Friesen
2005-09-20  5:11           ` Thomas Gleixner
2005-09-20  0:43   ` George Anzinger
2005-09-21 19:50 ` Roman Zippel
2005-09-21 22:41   ` Thomas Gleixner
2005-09-22 12:59     ` Ingo Molnar
2005-09-22 23:09     ` Roman Zippel
2005-09-22 23:31       ` Christopher Friesen
2005-09-23  0:25         ` Roman Zippel
2005-09-23  6:49           ` Thomas Gleixner
2005-09-24  3:15             ` Roman Zippel
2005-09-24  5:16               ` Ingo Molnar
2005-09-24 10:35                 ` Roman Zippel
2005-09-24 13:56                   ` Thomas Gleixner
2005-09-24 16:51                     ` Daniel Walker
2005-09-24 23:45                     ` Roman Zippel
2005-09-25 21:00                       ` Thomas Gleixner
2005-09-27 16:54                         ` Roman Zippel
2005-09-27 19:03                           ` Tim Bird
2005-09-28 16:36                             ` Roman Zippel
2005-09-25 21:02                       ` Thomas Gleixner
2005-09-27 16:48                         ` Roman Zippel
2005-09-27 18:38                           ` Tim Bird
2005-09-27 20:36                             ` George Anzinger
2005-09-23  2:25       ` john stultz
2005-09-23  8:27       ` Thomas Gleixner
2005-09-24  2:43         ` Roman Zippel
2005-09-24  5:03           ` Ingo Molnar
2005-09-24  9:04           ` James Bruce
2005-09-23 15:21       ` Paul E. McKenney
2005-09-24  3:38         ` Roman Zippel
2005-09-25 15:48 Sid Boyce
2005-09-25 18:20 ` Zwane Mwaikambo
2005-09-26  0:02   ` Sid Boyce

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=20050920071401.GB14285@elte.hu \
    --to=mingo@elte.hu \
    --cc=akpm@osdl.org \
    --cc=clameter@engr.sgi.com \
    --cc=george@mvista.com \
    --cc=johnstul@us.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paulmck@us.ibm.com \
    --cc=tglx@linutronix.de \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).