[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip
From: |
Michael Tokarev |
Subject: |
Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip |
Date: |
Mon, 13 Aug 2012 17:16:22 +0400 |
User-agent: |
Mozilla/5.0 (X11; Linux i686 on x86_64; rv:10.0.5) Gecko/20120624 Icedove/10.0.5 |
On 13.08.2012 17:07, Jan Kiszka wrote:
[]
>> The bisecion leads to this commit:
>>
>> commit 17ee47418e65b1593defb30edbab33ccd47fc1f8
>> Merge: 13b0496 5d17c0d
>> Author: Jan Kiszka <address@hidden>
>> Date: Tue Apr 10 16:26:23 2012 +0200
>>
>> Merge commit '5d17c0d2df4998598e6002b27b8e47e792899a0f' into
>> queues/qemu-merge
[]
>> Cc'ing Jan for help. The short story: tsc timer calibration
>> broke in 1.1+ with in-kernel irqchip (only) for several
>> apps (seabios and grub are two examples), the time is ticking
>> about 100 times faster. In grub the timer is calibrated
>> using pit. The above commit is the result of bisection.
>
> Did the versions you tested include the commit 0cdd3d1444 (kvm: i8254:
> Fix conversion of in-kernel to userspace state)?
While bisecting I didn't have this commit applied, since it were
applied past (qemu)-1.1. It is included into qemu-kvm 1.1.0
(as 960d355dc60d9), and that version behaves _exactly_ the same -
the time in grub is ticking 100 times faster. I mentioned in this
thread that the problem persists in current qemu (and qemu-kvm)
git too.
I can repeat the bisection with this commit applied after the
above "bad" commit. Should I?
Thanks,
/mjt
- [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Michael Tokarev, 2012/08/09
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Marcelo Tosatti, 2012/08/09
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Gleb Natapov, 2012/08/10
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Michael Tokarev, 2012/08/10
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Gleb Natapov, 2012/08/12
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Michael Tokarev, 2012/08/12
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Jan Kiszka, 2012/08/13
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip,
Michael Tokarev <=
- Re: [Qemu-devel] TSC in qem[-kvm] 1.1+ and in-kernel irqchip, Jan Kiszka, 2012/08/13
- [Qemu-devel] [PATCH uq/master] kvm: i8254: Finish time conversion fix, Jan Kiszka, 2012/08/13
- Re: [Qemu-devel] [PATCH uq/master] kvm: i8254: Finish time conversion fix, Michael Tokarev, 2012/08/13
- Re: [Qemu-devel] [PATCH uq/master] kvm: i8254: Finish time conversion fix, Jan Kiszka, 2012/08/14