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Date: Wed, 24 Jul 2013 13:28:23 +0200
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Subject: Re: [Qemu-devel] [RFC 0/8] arm AioContext with its own timer stuff
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To: Alex Bligh <alex@alex.org.uk>
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Jan Kiszka <jan.kiszka@siemens.com>, liu ping fan <qemulist@gmail.com>, qemu-devel@nongnu.org, Anthony Liguori <anthony@codemonkey.ws>

Il 24/07/2013 10:37, Alex Bligh ha scritto:
> 
> 
> --On 24 July 2013 09:01:22 +0100 Alex Bligh <alex@alex.org.uk> wrote:
> 
>>>> Most 'reasonable' POSIX compliant operating systems have ppoll
>>>
>>> Really?  I could find no manpages for any of Solaris and *BSD.
>>
>> OK I shall (re)research that then! I suppose select() / pselect() is
>> an alternative when there are few FDs.
> 
> Looks like I was wrong. However, pselect support is pretty wide.

Yes, on the other hand we only recently switched from select() to poll().

I guess using ms resolution wouldn't be too bad for non-Linux.  After
all before dynticks support was added to the alarm timer, it used to use
/dev/rtc or /dev/hpet -- which is very precise but only has ms
resolution too.

We might not care about the slack either, in practice.  TCG timing sucks
anyway, and for KVM/Xen most relevant device models are in the kernel.

Paolo