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Re: [Qemu-block] [Qemu-devel] [PATCH v9 0/8] Optimize VMDK I/O by alloca
From: |
John Snow |
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH v9 0/8] Optimize VMDK I/O by allocating multiple clusters |
Date: |
Thu, 2 Nov 2017 17:02:14 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 |
On 10/20/2017 02:53 AM, Ashijeet Acharya wrote:
>
> On Fri, Oct 20, 2017 at 11:58 Fam Zheng <address@hidden
> <mailto:address@hidden>> wrote:
>
> On Mon, 10/09 22:12, Fam Zheng wrote:
> > On Mon, 10/09 18:29, Ashijeet Acharya wrote:
> > > Optimization test results:
> > >
> > > This patch series improves 128 KB sequential write performance to an
> > > empty VMDK file by 54%
> > >
> > > Benchmark command: ./qemu-img bench -w -c 1024 -s 128K -d 1 -t
> none -f
> > > vmdk test.vmdk
> > >
> > > Changes in v9:
> > > - rebase the series
> >
> > Thanks, looks good to me, applied:
> >
> > https://github.com/famz/qemu/tree/staging
>
> Ashijeet: I've been testing my branch and it seems installing
> Fedora/CentOS to a
> VMDK image is broken with your patches applied. Both guest and QEMU are
> responsive, but the installing of packages stops to make any
> progress at some
> point:
>
> Installing rootfiles.noarch (317/318)
> Installing langpacks-en.noarch (318/318)
> Performing post-installation setup tasks
> Configuring fedora-release.noarch
> Configuring filesystem.x86_64
> Configuring GeoIP-GeoLite-data.noarch
> Configuring python3.x86_64
> Configuring fedora-logos.x86_64
> Configuring kernel-core.x86_64
>
> # hang here
>
> Can you reproduce this on your machine?
>
> My command line is something like this:
>
> qemu-system-x86_64 -enable-kvm -cpu host -m 1G -qmp
> unix:/home/fam/.q/qemu-8DOC9EF4/qmp,server,nowait -name 8DOC9EF4
> -netdev user,id=vnet,hostfwd=:0.0.0.0 <http://0.0.0.0>:10022-:22
> -device virtio-net-pci,netdev=vnet -drive
> file=/var/tmp/test2.vmdk,if=none,id=drive-1,cache=none,aio=native
> -device virtio-blk-pci,drive=drive-1 -cdrom
> /stor/iso/CentOS-6.9-x86_64-minimal.iso -pidfile
> /home/fam/.q/qemu-8DOC9EF4/pid
>
> qemu.git master doesn't have this problem. So I'll drop this series
> from the
> pull request until it is resolved.
>
>
> Fam: Alright, I will look into this but I cannot give you a deadline
> unfortunately. I will try my best to resolve this as soon as though.
>
> Ashijeet
>
>
>
> Fam
>
Do we need to temporarily roll this back for the 2.11 release if it
cannot be addressed in time?
- Re: [Qemu-block] [Qemu-devel] [PATCH v9 0/8] Optimize VMDK I/O by allocating multiple clusters,
John Snow <=