From: Jan Kiszka <jan.kiszka@siemens.com>
To: Glauber Costa <glommer@redhat.com>
Cc: Ulrich Obergfell <uobergfe@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"gcosta@redhat.com" <gcosta@redhat.com>,
"avi@redhat.com" <avi@redhat.com>,
"aliguori@us.ibm.com" <aliguori@us.ibm.com>
Subject: Re: [PATCH v2 5/5] hpet 'driftfix': add code in hpet_timer() to compensate delayed callbacks and coalesced interrupts
Date: Fri, 08 Apr 2011 18:12:32 +0200 [thread overview]
Message-ID: <4D9F33F0.9010902@siemens.com> (raw)
In-Reply-To: <1302278924.3021.10.camel@mothafucka.localdomain>
On 2011-04-08 18:08, Glauber Costa wrote:
> On Fri, 2011-04-08 at 17:54 +0200, Jan Kiszka wrote:
>>> + }
>>
>> Did I miss some change in the plan? I thought we were heading for a
>> generic, reusable driftfix tool box (or periodic timer service)? Or is
>> this intentionally an intermediate step?
>
> Which is a medium to long way in the future. There is benefit of having
> this early, since it can deliver real functionality - a reliable hpet,
> and converting to whatever the api may look like in the future.
>
Well, if the PIT and the RTC should use it as well, which is probably
rather a short term goal, we already have two more users.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
WARNING: multiple messages have this Message-ID (diff)
From: Jan Kiszka <jan.kiszka@siemens.com>
To: Glauber Costa <glommer@redhat.com>
Cc: "aliguori@us.ibm.com" <aliguori@us.ibm.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Ulrich Obergfell <uobergfe@redhat.com>,
"gcosta@redhat.com" <gcosta@redhat.com>,
"avi@redhat.com" <avi@redhat.com>
Subject: [Qemu-devel] Re: [PATCH v2 5/5] hpet 'driftfix': add code in hpet_timer() to compensate delayed callbacks and coalesced interrupts
Date: Fri, 08 Apr 2011 18:12:32 +0200 [thread overview]
Message-ID: <4D9F33F0.9010902@siemens.com> (raw)
In-Reply-To: <1302278924.3021.10.camel@mothafucka.localdomain>
On 2011-04-08 18:08, Glauber Costa wrote:
> On Fri, 2011-04-08 at 17:54 +0200, Jan Kiszka wrote:
>>> + }
>>
>> Did I miss some change in the plan? I thought we were heading for a
>> generic, reusable driftfix tool box (or periodic timer service)? Or is
>> this intentionally an intermediate step?
>
> Which is a medium to long way in the future. There is benefit of having
> this early, since it can deliver real functionality - a reliable hpet,
> and converting to whatever the api may look like in the future.
>
Well, if the PIT and the RTC should use it as well, which is probably
rather a short term goal, we already have two more users.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2011-04-08 16:12 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-08 15:20 [PATCH v2 0/5] hpet 'driftfix': alleviate time drift with HPET periodic timers Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:20 ` [PATCH v2 1/5] hpet 'driftfix': add hooks required to detect coalesced interrupts (x86 apic only) Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:46 ` Anthony Liguori
2011-04-08 15:46 ` Anthony Liguori
2011-04-08 15:51 ` Jan Kiszka
2011-04-08 15:51 ` [Qemu-devel] " Jan Kiszka
2011-04-08 15:20 ` [PATCH v2 2/5] hpet 'driftfix': add driftfix property to HPETState and DeviceInfo Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:20 ` [PATCH v2 3/5] hpet 'driftfix': add fields to HPETTimer and VMStateDescription Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:47 ` Anthony Liguori
2011-04-08 15:47 ` Anthony Liguori
2011-04-11 8:24 ` Ulrich Obergfell
2011-04-11 8:24 ` Ulrich Obergfell
2011-04-11 9:06 ` Ulrich Obergfell
2011-04-11 9:06 ` Ulrich Obergfell
2011-04-11 9:08 ` Avi Kivity
2011-04-11 9:08 ` Avi Kivity
2011-04-11 13:10 ` Anthony Liguori
2011-04-11 13:10 ` Anthony Liguori
2011-04-11 13:39 ` Glauber Costa
2011-04-11 13:39 ` Glauber Costa
2011-04-11 13:43 ` Avi Kivity
2011-04-11 13:43 ` Avi Kivity
2011-04-11 13:47 ` Anthony Liguori
2011-04-11 13:47 ` Anthony Liguori
2011-04-11 13:57 ` Glauber Costa
2011-04-11 13:57 ` Glauber Costa
2011-04-11 13:10 ` Anthony Liguori
2011-04-11 13:10 ` Anthony Liguori
2011-04-08 15:20 ` [PATCH v2 4/5] hpet 'driftfix': add code in update_irq() to detect coalesced interrupts (x86 apic only) Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:20 ` [PATCH v2 5/5] hpet 'driftfix': add code in hpet_timer() to compensate delayed callbacks and coalesced interrupts Ulrich Obergfell
2011-04-08 15:20 ` [Qemu-devel] " Ulrich Obergfell
2011-04-08 15:54 ` Jan Kiszka
2011-04-08 15:54 ` [Qemu-devel] " Jan Kiszka
2011-04-08 16:08 ` Glauber Costa
2011-04-08 16:08 ` [Qemu-devel] " Glauber Costa
2011-04-08 16:12 ` Jan Kiszka [this message]
2011-04-08 16:12 ` Jan Kiszka
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