From: Gleb Natapov <gleb@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Paul Brook <paul@codesourcery.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load.
Date: Tue, 11 Nov 2008 16:43:24 +0200 [thread overview]
Message-ID: <20081111144324.GE20617@redhat.com> (raw)
In-Reply-To: <49185744.6010500@codemonkey.ws>
On Mon, Nov 10, 2008 at 09:46:12AM -0600, Anthony Liguori wrote:
> Gleb Natapov wrote:
>> On Mon, Nov 10, 2008 at 09:24:55AM -0600, Anthony Liguori wrote:
>>
>>> Gleb Natapov wrote:
>>>
>>>> On Sun, Nov 09, 2008 at 10:36:59AM -0600, Anthony Liguori wrote:
>>>>
>>>>
>>>>
>>>>> Otherwise, I'm curious if you have any insight into where we're
>>>>> pausing for 10ms that's causing the missed interrupt?
>>>>>
>>>>>
>>>> Don't know yet.
>>>>
>>> What's your full command line?
>>>
>>>
>> /home/gleb/install/qemu/org/bin/qemu-system-x86_64 -hda Windows2003.raw -m 1024 -net
>> nic,model=rtl8139 -net user -vnc 172.17.10.111:1 -usbdevice tablet
>>
>
> -usbdevice tablet may be the culprit. Is the guest doing an significant IO?
>
-usbdevice tablet has nothing to do with it. Qemu misses interrupt even
without this option and with SDL screen it misses them in bunches when
SDL redraws a screen. In case of vnc qemu misses interrupt because of
fsync() call in raw_flush(), or so my instrumentation shows.
--
Gleb.
next prev parent reply other threads:[~2008-11-11 14:47 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-29 15:22 [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load Gleb Natapov
2008-10-29 15:22 ` [Qemu-devel] [PATCH 1/3] Change qemu_set_irq() to return status information Gleb Natapov
2008-10-29 15:22 ` [Qemu-devel] [PATCH 2/3] Fix time drift problem under high load when PIT is in use Gleb Natapov
2008-10-29 15:22 ` [Qemu-devel] [PATCH 3/3] Fix time drift problem under high load when RTC " Gleb Natapov
2008-11-05 12:46 ` Dor Laor
2008-10-31 19:17 ` [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load Anthony Liguori
2008-11-02 13:04 ` Gleb Natapov
2008-11-05 12:45 ` Dor Laor
2008-11-05 15:48 ` andrzej zaborowski
2008-11-05 16:33 ` Anthony Liguori
2008-11-06 7:16 ` Gleb Natapov
2008-11-06 9:37 ` andrzej zaborowski
2008-11-06 10:08 ` Gleb Natapov
2008-11-06 13:21 ` andrzej zaborowski
2008-11-06 14:18 ` Gleb Natapov
2008-11-06 14:35 ` andrzej zaborowski
2008-11-06 15:04 ` Gleb Natapov
2008-11-06 15:41 ` Anthony Liguori
2008-11-07 23:18 ` andrzej zaborowski
2008-11-08 8:23 ` Gleb Natapov
2008-11-06 13:44 ` Paul Brook
2008-11-05 17:43 ` Gleb Natapov
2008-11-06 17:28 ` David S. Ahern
2008-11-05 16:43 ` Anthony Liguori
2008-11-06 3:55 ` Jamie Lokier
2008-11-06 8:12 ` Gleb Natapov
2008-11-06 14:10 ` Anthony Liguori
2008-11-06 14:24 ` Paul Brook
2008-11-06 14:40 ` Anthony Liguori
2008-11-06 14:51 ` Gleb Natapov
2008-11-06 15:37 ` Anthony Liguori
2008-11-08 8:36 ` Gleb Natapov
2008-11-08 22:14 ` Dor Laor
2008-11-09 7:40 ` Gleb Natapov
2008-11-09 16:38 ` Anthony Liguori
2008-11-09 21:00 ` Avi Kivity
2008-11-09 16:36 ` Anthony Liguori
2008-11-10 14:37 ` Gleb Natapov
2008-11-10 15:24 ` Anthony Liguori
2008-11-10 15:29 ` Gleb Natapov
2008-11-10 15:46 ` Anthony Liguori
2008-11-10 15:51 ` Gleb Natapov
2008-11-11 14:43 ` Gleb Natapov [this message]
2008-11-11 17:26 ` Anthony Liguori
2008-11-11 20:17 ` Anthony Liguori
2008-11-12 11:42 ` Gleb Natapov
2008-11-12 11:54 ` Glauber Costa
2008-11-12 12:38 ` Dor Laor
2008-11-06 3:41 ` Jamie Lokier
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