From: Gleb Natapov <gleb@redhat.com>
To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: Alexander Graf <agraf@suse.de>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Question about qemu firmware configuration (fw_cfg) device
Date: Mon, 19 Jul 2010 16:12:34 +0300 [thread overview]
Message-ID: <20100719131234.GU4689@redhat.com> (raw)
In-Reply-To: <20100719130627.GA3326@amd.home.annexia.org>
On Mon, Jul 19, 2010 at 02:06:27PM +0100, Richard W.M. Jones wrote:
> On Mon, Jul 19, 2010 at 12:15:43PM +0300, Gleb Natapov wrote:
> > That what we are talking about, no? We are trying to find faster way to
> > load kernel/initrd and stay architectural. Honestly I would expect much
> > greater speedup from Richard's approach like 2 seconds vs 8 seconds. It
> > is hard to justify code complication just for 1 second speedup.
>
> I've no idea where this "8 seconds" comes from. Total boot time
That was number generated by may random number generator. I was just
trying to say that I would have expected much more gain from copying
kernel/initrd directly into the memory considering how much is going
on during pio string emulation.
> currently is < 8 seconds even without my patch. My patch takes it
> from 7.5 seconds to 6.5 seconds.
>
It shows that we are not so bad at emulating pio string operations.
--
Gleb.
next prev parent reply other threads:[~2010-07-19 13:12 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-17 9:50 [Qemu-devel] Question about qemu firmware configuration (fw_cfg) device Richard W.M. Jones
2010-07-17 9:53 ` Richard W.M. Jones
2010-07-18 17:26 ` Alexander Graf
2010-07-18 20:09 ` Richard W.M. Jones
2010-07-18 20:32 ` Alexander Graf
2010-07-19 6:23 ` Gleb Natapov
2010-07-19 7:28 ` Richard W.M. Jones
2010-07-19 7:33 ` Gleb Natapov
2010-07-19 7:40 ` Alexander Graf
2010-07-19 7:51 ` Gleb Natapov
2010-07-19 7:57 ` Alexander Graf
2010-07-19 8:01 ` Gleb Natapov
2010-07-19 8:08 ` Alexander Graf
2010-07-19 8:19 ` Gleb Natapov
2010-07-19 8:24 ` Alexander Graf
2010-07-19 8:30 ` Gleb Natapov
2010-07-19 8:41 ` Alexander Graf
2010-07-19 8:48 ` Gleb Natapov
2010-07-19 8:54 ` Alexander Graf
2010-07-19 9:00 ` Gleb Natapov
2010-07-19 9:02 ` Alexander Graf
2010-07-19 9:10 ` Gleb Natapov
2010-07-19 9:13 ` Alexander Graf
2010-07-19 9:19 ` Gleb Natapov
2010-07-19 9:21 ` Alexander Graf
2010-07-19 9:32 ` Gleb Natapov
2010-07-19 9:23 ` Richard W.M. Jones
2010-07-20 13:15 ` Jamie Lokier
2010-07-20 13:40 ` Gleb Natapov
2010-07-20 13:59 ` Richard W.M. Jones
2010-07-19 9:19 ` Richard W.M. Jones
2010-07-19 7:44 ` Richard W.M. Jones
2010-07-19 7:55 ` Gleb Natapov
2010-07-19 8:34 ` Richard W.M. Jones
2010-07-19 8:40 ` Gleb Natapov
2010-07-19 9:00 ` Richard W.M. Jones
2010-07-19 9:04 ` Richard W.M. Jones
2010-07-19 9:06 ` Gleb Natapov
2010-07-19 9:09 ` Alexander Graf
2010-07-19 9:15 ` Gleb Natapov
2010-07-19 9:16 ` Alexander Graf
2010-07-19 13:06 ` Richard W.M. Jones
2010-07-19 13:12 ` Gleb Natapov [this message]
2010-07-19 14:52 ` Anthony Liguori
2010-07-19 14:54 ` Gleb Natapov
2010-07-19 14:45 ` Anthony Liguori
2010-07-19 14:53 ` Gleb Natapov
2010-07-19 15:54 ` Anthony Liguori
2010-07-19 16:11 ` Gleb Natapov
2010-07-19 16:47 ` Richard W.M. Jones
2010-07-19 17:04 ` Gleb Natapov
2010-07-19 19:06 ` Anthony Liguori
2010-07-19 6:12 ` Gleb Natapov
2010-07-19 6:14 ` [Qemu-devel] " Gleb Natapov
2010-07-20 22:22 ` [Qemu-devel] " Blue Swirl
2010-07-21 7:27 ` Alexander Graf
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