From: Andi Kleen <ak@suse.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrea Arcangeli <andrea@suse.de>,
Peter Zaitsev <peter@mysql.com>, Andrew Morton <akpm@osdl.org>,
riel@redhat.com, mbligh@aracnet.com,
linux-kernel@vger.kernel.org
Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)
Date: 05 Mar 2004 16:51:15 +0100 [thread overview]
Message-ID: <p73ad2v47ik.fsf@brahms.suse.de> (raw)
In-Reply-To: <20040305150225.GA13237@elte.hu.suse.lists.linux.kernel>
Ingo Molnar <mingo@elte.hu> writes:
> * Andrea Arcangeli <andrea@suse.de> wrote:
>
> > I thought time() wouldn't be called more than 1 per second anyways,
> > why would anyone call time more than 1 per second?
>
> if mysql in fact calls time() frequently, then it should rather start a
> worker thread that updates a global time variable every second.
I just fixed the x86-64 vsyscall vtime() to only read the user mapped
__xtime.tv_sec. This should be equivalent. Only drawback is that if a
timer tick is delayed for too long it won't fix that, but I guess
that's reasonable for a 1s resolution.
-Andi
next prev parent reply other threads:[~2004-03-05 15:51 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-27 1:33 2.4.23aa2 (bugfixes and important VM improvements for the high end) Andrea Arcangeli
2004-02-27 4:38 ` Rik van Riel
2004-02-27 17:32 ` Andrea Arcangeli
2004-02-27 19:08 ` Rik van Riel
2004-02-27 20:29 ` Andrew Morton
2004-02-27 20:49 ` Rik van Riel
2004-02-27 20:55 ` Andrew Morton
2004-02-27 21:28 ` Andrea Arcangeli
2004-02-27 21:37 ` Andrea Arcangeli
2004-02-28 3:22 ` Andrea Arcangeli
2004-03-01 11:10 ` Nikita Danilov
2004-02-27 21:15 ` Andrea Arcangeli
2004-02-27 22:03 ` Martin J. Bligh
2004-02-27 22:23 ` Andrew Morton
2004-02-28 2:32 ` Andrea Arcangeli
2004-02-28 4:57 ` Wim Coekaerts
2004-02-28 6:18 ` Andrea Arcangeli
2004-02-28 6:45 ` Martin J. Bligh
2004-02-28 7:05 ` Andrea Arcangeli
2004-02-28 9:19 ` Dave Hansen
2004-03-18 2:44 ` Andrea Arcangeli
[not found] ` <20040228061838.GO8834@dualathlon.random.suse.lists.linux.kernel>
2004-02-28 12:46 ` Andi Kleen
2004-02-29 1:39 ` Andrea Arcangeli
2004-02-29 2:29 ` Andi Kleen
2004-02-29 16:34 ` Andrea Arcangeli
2004-02-28 6:10 ` Martin J. Bligh
2004-02-28 6:43 ` Andrea Arcangeli
2004-02-28 7:00 ` Martin J. Bligh
2004-02-28 7:29 ` Andrea Arcangeli
2004-02-28 14:55 ` Rik van Riel
2004-02-28 15:06 ` Arjan van de Ven
2004-02-29 1:43 ` Andrea Arcangeli
[not found] ` < 1078370073.3403.759.camel@abyss.local>
2004-03-04 3:14 ` Peter Zaitsev
2004-03-04 3:33 ` Andrew Morton
2004-03-04 3:44 ` Peter Zaitsev
2004-03-04 4:07 ` Andrew Morton
2004-03-04 4:44 ` Peter Zaitsev
2004-03-04 4:52 ` Andrea Arcangeli
2004-03-04 5:10 ` Andrew Morton
2004-03-04 5:27 ` Andrea Arcangeli
2004-03-04 5:38 ` Andrew Morton
2004-03-05 20:19 ` Jamie Lokier
2004-03-05 20:33 ` Andrea Arcangeli
2004-03-05 21:44 ` Jamie Lokier
2004-03-04 12:12 ` Rik van Riel
2004-03-04 16:21 ` Peter Zaitsev
2004-03-04 18:13 ` Andrea Arcangeli
2004-03-04 17:35 ` Martin J. Bligh
2004-03-04 18:16 ` Andrea Arcangeli
2004-03-04 19:31 ` Martin J. Bligh
2004-03-04 20:21 ` Peter Zaitsev
2004-03-05 10:33 ` Ingo Molnar
2004-03-05 14:15 ` Andrea Arcangeli
2004-03-05 14:32 ` Ingo Molnar
2004-03-05 14:58 ` Andrea Arcangeli
2004-03-05 15:26 ` Ingo Molnar
2004-03-05 15:53 ` Andrea Arcangeli
2004-03-07 8:41 ` Ingo Molnar
2004-03-07 10:29 ` Nick Piggin
2004-03-07 17:33 ` Andrea Arcangeli
2004-03-08 5:15 ` Nick Piggin
2004-03-07 17:24 ` Andrea Arcangeli
2004-03-05 21:28 ` Martin J. Bligh
2004-03-05 18:42 ` Martin J. Bligh
2004-03-05 19:13 ` Andrea Arcangeli
2004-03-05 19:55 ` Martin J. Bligh
2004-03-05 20:29 ` Andrea Arcangeli
2004-03-05 20:41 ` Andrew Morton
2004-03-05 21:07 ` Andrea Arcangeli
2004-03-05 22:12 ` Andrew Morton
2004-03-05 14:34 ` Ingo Molnar
2004-03-05 14:59 ` Andrea Arcangeli
2004-03-05 15:02 ` Ingo Molnar
[not found] ` <20040305150225.GA13237@elte.hu.suse.lists.linux.kernel>
2004-03-05 15:51 ` Andi Kleen [this message]
2004-03-05 16:23 ` Ingo Molnar
2004-03-05 16:39 ` Andrea Arcangeli
2004-03-07 8:16 ` Ingo Molnar
2004-03-10 13:21 ` Andi Kleen
2004-03-05 16:42 ` Andrea Arcangeli
2004-03-05 16:49 ` Ingo Molnar
2004-03-05 16:58 ` Andrea Arcangeli
2004-03-05 20:11 ` Jamie Lokier
2004-03-06 5:12 ` Jamie Lokier
2004-03-06 12:56 ` Magnus Naeslund(t)
2004-03-06 13:13 ` Magnus Naeslund(t)
2004-03-07 11:55 ` Ingo Molnar
2004-03-07 6:50 ` Peter Zaitsev
2004-03-02 9:10 ` Kurt Garloff
2004-03-02 15:32 ` Martin J. Bligh
2004-02-27 21:42 ` Hugh Dickins
2004-02-27 23:18 ` Marcelo Tosatti
2004-02-27 22:39 ` Andrew Morton
2004-02-27 20:31 ` Andrea Arcangeli
2004-02-29 6:34 ` Mike Fedyk
[not found] <20040304175821.GO4922@dualathlon.random>
2004-03-04 22:14 ` Rik van Riel
2004-03-04 23:24 ` Andrea Arcangeli
2004-03-05 3:43 ` Rik van Riel
[not found] <1u7eQ-6Bz-1@gated-at.bofh.it>
[not found] ` <1ue6M-45w-11@gated-at.bofh.it>
[not found] ` <1uofN-4Rh-25@gated-at.bofh.it>
[not found] ` <1vRz3-5p2-11@gated-at.bofh.it>
[not found] ` <1vRSn-5Fc-11@gated-at.bofh.it>
[not found] ` <1vS26-5On-21@gated-at.bofh.it>
[not found] ` <1wkUr-3QW-11@gated-at.bofh.it>
[not found] ` <1wolx-7ET-31@gated-at.bofh.it>
[not found] ` <1woEM-7Yx-41@gated-at.bofh.it>
[not found] ` <1wp8b-7x-3@gated-at.bofh.it>
[not found] ` <1wp8l-7x-25@gated-at.bofh.it>
[not found] ` <1x0qG-Dr-3@gated-at.bofh.it>
2004-03-12 21:15 ` Andi Kleen
2004-03-18 19:50 ` Peter Zaitsev
[not found] ` <1woEJ-7Yx-25@gated-at.bofh.it>
[not found] ` <1wp8c-7x-5@gated-at.bofh.it>
[not found] ` <1wprd-qI-21@gated-at.bofh.it>
[not found] ` <1wpUz-Tw-21@gated-at.bofh.it>
[not found] ` <1x293-2nT-7@gated-at.bofh.it>
2004-03-12 21:25 ` Andi Kleen
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