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Re: [Qemu-devel] Windows slow boot: contractor wanted
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] Windows slow boot: contractor wanted |
Date: |
Wed, 22 Aug 2012 15:44:39 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 |
On 08/22/2012 03:40 PM, Richard Davies wrote:
>
> I can trigger the slow boots without KSM and they have the same profile,
> with _raw_spin_lock_irqsave and isolate_freepages_block at the top.
>
> I reduced to 3x 20GB 8-core VMs on a 128GB host (rather than 3x 40GB 8-core
> VMs), and haven't managed to get a really slow boot yet (>5 minutes). I'll
> post agan when I get one.
I think you can go higher than that. But 120GB on a 128GB host is
pushing it.
>
> In the slowest boot that I have so far (1-2 minutes), this is the perf top
> ouput:
>
>
> PerfTop: 26741 irqs/sec kernel:97.5% exact: 0.0% [4000Hz cycles],
> (all, 16 CPUs)
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> 53.94% [kernel] [k] clear_page_c
> 2.77% [kernel] [k] svm_vcpu_put
> 2.60% [kernel] [k] svm_vcpu_run
> 1.79% [kernel] [k] sub_preempt_count
> 1.56% [kernel] [k] svm_vcpu_load
> 1.44% [kernel] [k] __schedule
> 1.36% [kernel] [k] kvm_arch_vcpu_ioctl_run
> 1.34% [kernel] [k] resched_task
> 1.32% [kernel] [k] _raw_spin_lock
> 0.98% [kernel] [k] trace_preempt_on
> 0.95% [kernel] [k] get_parent_ip
> 0.94% [kernel] [k] yield_to
This is pretty normal, Widows is touching memory so clear_page_c() is
called to scrub it.
--
error compiling committee.c: too many arguments to function
- Re: [Qemu-devel] Windows slow boot: contractor wanted, (continued)
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Avi Kivity, 2012/08/19
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/20
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Avi Kivity, 2012/08/21
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/21
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Troy Benjegerdes, 2012/08/21
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Avi Kivity, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted,
Avi Kivity <=
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Avi Kivity, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Troy Benjegerdes, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/25
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Rik van Riel, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/22
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/25
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Rik van Riel, 2012/08/25
- Re: [Qemu-devel] Windows slow boot: contractor wanted, Richard Davies, 2012/08/26