From: Vivek Goyal <vgoyal@redhat.com>
To: Miklos Szeredi <mszeredi@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"Venegas Munoz,
Jose Carlos" <jose.carlos.venegas.munoz@intel.com>,
"cdupontd@redhat.com" <cdupontd@redhat.com>,
virtio-fs-list <virtio-fs@redhat.com>,
"Shinde, Archana M" <archana.m.shinde@intel.com>
Subject: Re: [Virtio-fs] virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance)
Date: Tue, 29 Sep 2020 11:28:12 -0400 [thread overview]
Message-ID: <20200929152812.GF220516@redhat.com> (raw)
In-Reply-To: <CAOssrKcVNs=uiU2U1-ScowogFan8W=iw7kyTCnaz-vL8r9gLmw@mail.gmail.com>
On Tue, Sep 29, 2020 at 03:49:04PM +0200, Miklos Szeredi wrote:
> On Tue, Sep 29, 2020 at 3:18 PM Vivek Goyal <vgoyal@redhat.com> wrote:
>
> > - virtiofs cache=none mode is faster than cache=auto mode for this
> > workload.
>
> Not sure why. One cause could be that readahead is not perfect at
> detecting the random pattern. Could we compare total I/O on the
> server vs. total I/O by fio?
Ran tests with auto_inval_data disabled and compared with other results.
vtfs-auto-ex-randrw randrw-psync 27.8mb/9547kb 7136/2386
vtfs-auto-sh-randrw randrw-psync 43.3mb/14.4mb 10.8k/3709
vtfs-auto-sh-noinval randrw-psync 50.5mb/16.9mb 12.6k/4330
vtfs-none-sh-randrw randrw-psync 54.1mb/18.1mb 13.5k/4649
With auto_inval_data disabled, this time I saw around 20% performance jump
in READ and is now much closer to cache=none performance.
Thanks
Vivek
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: Miklos Szeredi <mszeredi@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"Venegas Munoz,
Jose Carlos" <jose.carlos.venegas.munoz@intel.com>,
"cdupontd@redhat.com" <cdupontd@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
virtio-fs-list <virtio-fs@redhat.com>,
"Shinde, Archana M" <archana.m.shinde@intel.com>
Subject: Re: [Virtio-fs] virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance)
Date: Tue, 29 Sep 2020 11:28:12 -0400 [thread overview]
Message-ID: <20200929152812.GF220516@redhat.com> (raw)
In-Reply-To: <CAOssrKcVNs=uiU2U1-ScowogFan8W=iw7kyTCnaz-vL8r9gLmw@mail.gmail.com>
On Tue, Sep 29, 2020 at 03:49:04PM +0200, Miklos Szeredi wrote:
> On Tue, Sep 29, 2020 at 3:18 PM Vivek Goyal <vgoyal@redhat.com> wrote:
>
> > - virtiofs cache=none mode is faster than cache=auto mode for this
> > workload.
>
> Not sure why. One cause could be that readahead is not perfect at
> detecting the random pattern. Could we compare total I/O on the
> server vs. total I/O by fio?
Ran tests with auto_inval_data disabled and compared with other results.
vtfs-auto-ex-randrw randrw-psync 27.8mb/9547kb 7136/2386
vtfs-auto-sh-randrw randrw-psync 43.3mb/14.4mb 10.8k/3709
vtfs-auto-sh-noinval randrw-psync 50.5mb/16.9mb 12.6k/4330
vtfs-none-sh-randrw randrw-psync 54.1mb/18.1mb 13.5k/4649
With auto_inval_data disabled, this time I saw around 20% performance jump
in READ and is now much closer to cache=none performance.
Thanks
Vivek
next prev parent reply other threads:[~2020-09-29 15:28 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 ` [Virtio-fs] " Vivek Goyal
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 [this message]
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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