From: Vivek Goyal <vgoyal@redhat.com>
To: Christian Schoenebeck <qemu_oss@crudebyte.com>
Cc: "Shinde, Archana M" <archana.m.shinde@intel.com>,
"Venegas Munoz,
Jose Carlos" <jose.carlos.venegas.munoz@intel.com>,
qemu-devel@nongnu.org, virtio-fs-list <virtio-fs@redhat.com>,
Greg Kurz <groug@kaod.org>,
"cdupontd@redhat.com" <cdupontd@redhat.com>
Subject: Re: [Virtio-fs] virtiofs vs 9p performance
Date: Fri, 25 Sep 2020 09:13:56 -0400 [thread overview]
Message-ID: <20200925131356.GD132653@redhat.com> (raw)
In-Reply-To: <17216624.eqST2d0sUl@silver>
On Fri, Sep 25, 2020 at 10:06:41AM +0200, Christian Schoenebeck wrote:
> On Freitag, 25. September 2020 00:10:23 CEST Vivek Goyal wrote:
> > In my testing, with cache=none, virtiofs performed better than 9p in
> > all the fio jobs I was running. For the case of cache=auto for virtiofs
> > (with xattr enabled), 9p performed better in certain write workloads. I
> > have identified root cause of that problem and working on
> > HANDLE_KILLPRIV_V2 patches to improve WRITE performance of virtiofs
> > with cache=auto and xattr enabled.
>
> Please note, when it comes to performance aspects, you should set a reasonable
> high value for 'msize' on 9p client side:
> https://wiki.qemu.org/Documentation/9psetup#msize
Interesting. I will try that. What does "msize" do?
>
> I'm also working on performance optimizations for 9p BTW. There is plenty of
> headroom to put it mildly. For QEMU 5.2 I started by addressing readdir
> requests:
> https://wiki.qemu.org/ChangeLog/5.2#9pfs
Nice. I guess this performance comparison between 9p and virtiofs is good.
Both the projects can try to identify weak points and improve performance.
Thanks
Vivek
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: Christian Schoenebeck <qemu_oss@crudebyte.com>
Cc: "Shinde, Archana M" <archana.m.shinde@intel.com>,
"Venegas Munoz,
Jose Carlos" <jose.carlos.venegas.munoz@intel.com>,
qemu-devel@nongnu.org,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
virtio-fs-list <virtio-fs@redhat.com>, Greg Kurz <groug@kaod.org>,
Stefan Hajnoczi <stefanha@redhat.com>,
"cdupontd@redhat.com" <cdupontd@redhat.com>
Subject: Re: virtiofs vs 9p performance
Date: Fri, 25 Sep 2020 09:13:56 -0400 [thread overview]
Message-ID: <20200925131356.GD132653@redhat.com> (raw)
In-Reply-To: <17216624.eqST2d0sUl@silver>
On Fri, Sep 25, 2020 at 10:06:41AM +0200, Christian Schoenebeck wrote:
> On Freitag, 25. September 2020 00:10:23 CEST Vivek Goyal wrote:
> > In my testing, with cache=none, virtiofs performed better than 9p in
> > all the fio jobs I was running. For the case of cache=auto for virtiofs
> > (with xattr enabled), 9p performed better in certain write workloads. I
> > have identified root cause of that problem and working on
> > HANDLE_KILLPRIV_V2 patches to improve WRITE performance of virtiofs
> > with cache=auto and xattr enabled.
>
> Please note, when it comes to performance aspects, you should set a reasonable
> high value for 'msize' on 9p client side:
> https://wiki.qemu.org/Documentation/9psetup#msize
Interesting. I will try that. What does "msize" do?
>
> I'm also working on performance optimizations for 9p BTW. There is plenty of
> headroom to put it mildly. For QEMU 5.2 I started by addressing readdir
> requests:
> https://wiki.qemu.org/ChangeLog/5.2#9pfs
Nice. I guess this performance comparison between 9p and virtiofs is good.
Both the projects can try to identify weak points and improve performance.
Thanks
Vivek
next prev parent reply other threads:[~2020-09-25 13:13 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 21:34 [Virtio-fs] tools/virtiofs: Multi threading seems to hurt performance Vivek Goyal
2020-09-18 21:34 ` Vivek Goyal
2020-09-21 8:39 ` [Virtio-fs] " Stefan Hajnoczi
2020-09-21 8:39 ` Stefan Hajnoczi
2020-09-21 13:39 ` [Virtio-fs] " Vivek Goyal
2020-09-21 13:39 ` Vivek Goyal
2020-09-21 16:57 ` [Virtio-fs] " Stefan Hajnoczi
2020-09-21 16:57 ` Stefan Hajnoczi
2020-09-21 8:50 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-21 8:50 ` Dr. David Alan Gilbert
2020-09-21 13:35 ` [Virtio-fs] " Vivek Goyal
2020-09-21 13:35 ` Vivek Goyal
2020-09-21 14:08 ` [Virtio-fs] " Daniel P. Berrangé
2020-09-21 14:08 ` Daniel P. Berrangé
2020-09-21 15:32 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-21 15:32 ` Dr. David Alan Gilbert
2020-09-22 10:25 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-22 10:25 ` Dr. David Alan Gilbert
2020-09-22 17:47 ` [Virtio-fs] " Vivek Goyal
2020-09-22 17:47 ` Vivek Goyal
2020-09-24 21:33 ` [Virtio-fs] " Venegas Munoz, Jose Carlos
2020-09-24 21:33 ` Venegas Munoz, Jose Carlos
2020-09-24 22:10 ` [Virtio-fs] virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance) Vivek Goyal
2020-09-24 22:10 ` Vivek Goyal
2020-09-25 8:06 ` [Virtio-fs] virtiofs vs 9p performance Christian Schoenebeck
2020-09-25 8:06 ` Christian Schoenebeck
2020-09-25 13:13 ` Vivek Goyal [this message]
2020-09-25 13:13 ` Vivek Goyal
2020-09-25 15:47 ` [Virtio-fs] " Christian Schoenebeck
2020-09-25 15:47 ` Christian Schoenebeck
2021-02-19 16:08 ` [Virtio-fs] Can not set high msize with virtio-9p (Was: Re: virtiofs vs 9p performance) Vivek Goyal
2021-02-19 16:08 ` Vivek Goyal
2021-02-19 17:33 ` [Virtio-fs] " Christian Schoenebeck
2021-02-19 17:33 ` Christian Schoenebeck
2021-02-19 19:01 ` [Virtio-fs] " Vivek Goyal
2021-02-19 19:01 ` Vivek Goyal
2021-02-20 15:38 ` [Virtio-fs] " Christian Schoenebeck
2021-02-20 15:38 ` Christian Schoenebeck
2021-02-22 12:18 ` [Virtio-fs] " Greg Kurz
2021-02-22 12:18 ` Greg Kurz
2021-02-22 15:08 ` [Virtio-fs] " Christian Schoenebeck
2021-02-22 15:08 ` Christian Schoenebeck
2021-02-22 17:11 ` [Virtio-fs] " Greg Kurz
2021-02-22 17:11 ` Greg Kurz
2021-02-23 13:39 ` [Virtio-fs] " Christian Schoenebeck
2021-02-23 13:39 ` Christian Schoenebeck
2021-02-23 14:07 ` [Virtio-fs] " Michael S. Tsirkin
2021-02-23 14:07 ` Michael S. Tsirkin
2021-02-24 15:16 ` [Virtio-fs] " Christian Schoenebeck
2021-02-24 15:16 ` Christian Schoenebeck
2021-02-24 15:43 ` [Virtio-fs] " Dominique Martinet
2021-02-24 15:43 ` Dominique Martinet
2021-02-26 13:49 ` [Virtio-fs] " Christian Schoenebeck
2021-02-26 13:49 ` Christian Schoenebeck
2021-02-27 0:03 ` [Virtio-fs] " Dominique Martinet
2021-02-27 0:03 ` Dominique Martinet
2021-03-03 14:04 ` [Virtio-fs] " Christian Schoenebeck
2021-03-03 14:04 ` Christian Schoenebeck
2021-03-03 14:50 ` [Virtio-fs] " Dominique Martinet
2021-03-03 14:50 ` Dominique Martinet
2021-03-05 14:57 ` [Virtio-fs] " Christian Schoenebeck
2021-03-05 14:57 ` Christian Schoenebeck
2020-09-25 12:41 ` [Virtio-fs] virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance) Dr. David Alan Gilbert
2020-09-25 12:41 ` Dr. David Alan Gilbert
2020-09-25 13:04 ` [Virtio-fs] " Christian Schoenebeck
2020-09-25 13:04 ` Christian Schoenebeck
2020-09-25 13:05 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-25 13:05 ` Dr. David Alan Gilbert
2020-09-25 16:05 ` [Virtio-fs] " Christian Schoenebeck
2020-09-25 16:05 ` Christian Schoenebeck
2020-09-25 16:33 ` [Virtio-fs] " Christian Schoenebeck
2020-09-25 16:33 ` Christian Schoenebeck
2020-09-25 18:51 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-25 18:51 ` Dr. David Alan Gilbert
2020-09-27 12:14 ` [Virtio-fs] " Christian Schoenebeck
2020-09-27 12:14 ` Christian Schoenebeck
2020-09-29 13:03 ` [Virtio-fs] " Vivek Goyal
2020-09-29 13:03 ` Vivek Goyal
2020-09-29 13:28 ` [Virtio-fs] " Christian Schoenebeck
2020-09-29 13:28 ` Christian Schoenebeck
2020-09-29 13:49 ` [Virtio-fs] " Vivek Goyal
2020-09-29 13:49 ` Vivek Goyal
2020-09-29 13:59 ` [Virtio-fs] " Christian Schoenebeck
2020-09-29 13:59 ` Christian Schoenebeck
2020-09-29 13:17 ` [Virtio-fs] " Vivek Goyal
2020-09-29 13:17 ` Vivek Goyal
2020-09-29 13:49 ` [Virtio-fs] " Miklos Szeredi
2020-09-29 13:49 ` Miklos Szeredi
2020-09-29 14:01 ` Vivek Goyal
2020-09-29 14:01 ` Vivek Goyal
2020-09-29 14:54 ` Miklos Szeredi
2020-09-29 14:54 ` Miklos Szeredi
2020-09-29 15:28 ` Vivek Goyal
2020-09-29 15:28 ` Vivek Goyal
2020-09-25 12:11 ` [Virtio-fs] tools/virtiofs: Multi threading seems to hurt performance Dr. David Alan Gilbert
2020-09-25 12:11 ` Dr. David Alan Gilbert
2020-09-25 13:11 ` [Virtio-fs] " Vivek Goyal
2020-09-25 13:11 ` Vivek Goyal
2020-09-21 20:16 ` [Virtio-fs] " Vivek Goyal
2020-09-21 20:16 ` Vivek Goyal
2020-09-22 11:09 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-09-22 11:09 ` Dr. David Alan Gilbert
2020-09-22 22:56 ` [Virtio-fs] " Vivek Goyal
2020-09-22 22:56 ` Vivek Goyal
2020-09-23 12:50 ` [Virtio-fs] " Chirantan Ekbote
2020-09-23 12:59 ` Vivek Goyal
2020-09-25 11:35 ` Dr. David Alan Gilbert
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