From: Bart Van Assche <Bart.VanAssche@sandisk.com>
To: "hch@infradead.org" <hch@infradead.org>, "hare@suse.de" <hare@suse.de>
Cc: "Linux-scsi@vger.kernel.org" <Linux-scsi@vger.kernel.org>,
"keith.busch@intel.com" <keith.busch@intel.com>,
"jthumshirn@suse.de" <jthumshirn@suse.de>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"lsf-pc@lists.linux-foundation.org"
<lsf-pc@lists.linux-foundation.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"sagi@grimberg.me" <sagi@grimberg.me>
Subject: Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers
Date: Wed, 11 Jan 2017 16:26:40 +0000 [thread overview]
Message-ID: <1484151982.2619.6.camel@sandisk.com> (raw)
In-Reply-To: <2aff05af-5e83-7d3d-f879-2cce02b6d88c@suse.de>
On Wed, 2017-01-11 at 17:22 +0100, Hannes Reinecke wrote:
> On 01/11/2017 05:12 PM, hch@infradead.org wrote:
> > On Wed, Jan 11, 2017 at 04:08:31PM +0000, Bart Van Assche wrote:
> > > A typical Ethernet network adapter delays the generation of an
> > > interrupt
> > > after it has received a packet. A typical block device or HBA does no=
t
> > > delay
> > > the generation of an interrupt that reports an I/O completion.
> >=20
> > NVMe allows for configurable interrupt coalescing, as do a few modern
> > SCSI HBAs.
>=20
> Essentially every modern SCSI HBA does interrupt coalescing; otherwise
> the queuing interface won't work efficiently.
Hello Hannes,
The first e-mail in this e-mail thread referred to measurements against a
block device for which interrupt coalescing was not enabled. I think that
the measurements have to be repeated against a block device for which
interrupt coalescing is enabled.
Bart.=
WARNING: multiple messages have this Message-ID (diff)
From: Bart.VanAssche@sandisk.com (Bart Van Assche)
Subject: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers
Date: Wed, 11 Jan 2017 16:26:40 +0000 [thread overview]
Message-ID: <1484151982.2619.6.camel@sandisk.com> (raw)
In-Reply-To: <2aff05af-5e83-7d3d-f879-2cce02b6d88c@suse.de>
On Wed, 2017-01-11@17:22 +0100, Hannes Reinecke wrote:
> On 01/11/2017 05:12 PM, hch@infradead.org wrote:
> > On Wed, Jan 11, 2017@04:08:31PM +0000, Bart Van Assche wrote:
> > > A typical Ethernet network adapter delays the generation of an
> > > interrupt
> > > after it has received a packet. A typical block device or HBA does not
> > > delay
> > > the generation of an interrupt that reports an I/O completion.
> >
> > NVMe allows for configurable interrupt coalescing, as do a few modern
> > SCSI HBAs.
>
> Essentially every modern SCSI HBA does interrupt coalescing; otherwise
> the queuing interface won't work efficiently.
Hello Hannes,
The first e-mail in this e-mail thread referred to measurements against a
block device for which interrupt coalescing was not enabled. I think that
the measurements have to be repeated against a block device for which
interrupt coalescing is enabled.
Bart.
WARNING: multiple messages have this Message-ID (diff)
From: Bart Van Assche <Bart.VanAssche@sandisk.com>
To: "hch@infradead.org" <hch@infradead.org>, "hare@suse.de" <hare@suse.de>
Cc: "Linux-scsi@vger.kernel.org" <Linux-scsi@vger.kernel.org>,
"keith.busch@intel.com" <keith.busch@intel.com>,
"jthumshirn@suse.de" <jthumshirn@suse.de>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"lsf-pc@lists.linux-foundation.org"
<lsf-pc@lists.linux-foundation.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"sagi@grimberg.me" <sagi@grimberg.me>
Subject: Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers
Date: Wed, 11 Jan 2017 16:26:40 +0000 [thread overview]
Message-ID: <1484151982.2619.6.camel@sandisk.com> (raw)
In-Reply-To: <2aff05af-5e83-7d3d-f879-2cce02b6d88c@suse.de>
On Wed, 2017-01-11 at 17:22 +0100, Hannes Reinecke wrote:
> On 01/11/2017 05:12 PM, hch@infradead.org wrote:
> > On Wed, Jan 11, 2017 at 04:08:31PM +0000, Bart Van Assche wrote:
> > > A typical Ethernet network adapter delays the generation of an
> > > interrupt
> > > after it has received a packet. A typical block device or HBA does not
> > > delay
> > > the generation of an interrupt that reports an I/O completion.
> >
> > NVMe allows for configurable interrupt coalescing, as do a few modern
> > SCSI HBAs.
>
> Essentially every modern SCSI HBA does interrupt coalescing; otherwise
> the queuing interface won't work efficiently.
Hello Hannes,
The first e-mail in this e-mail thread referred to measurements against a
block device for which interrupt coalescing was not enabled. I think that
the measurements have to be repeated against a block device for which
interrupt coalescing is enabled.
Bart.
next prev parent reply other threads:[~2017-01-11 16:26 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 13:43 [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers Johannes Thumshirn
2017-01-11 13:43 ` Johannes Thumshirn
2017-01-11 13:43 ` Johannes Thumshirn
2017-01-11 13:46 ` Hannes Reinecke
2017-01-11 13:46 ` Hannes Reinecke
2017-01-11 13:46 ` Hannes Reinecke
2017-01-11 15:07 ` Jens Axboe
2017-01-11 15:07 ` Jens Axboe
2017-01-11 15:13 ` Jens Axboe
2017-01-11 15:13 ` Jens Axboe
2017-01-12 8:23 ` Sagi Grimberg
2017-01-12 8:23 ` Sagi Grimberg
2017-01-12 10:02 ` Johannes Thumshirn
2017-01-12 10:02 ` Johannes Thumshirn
2017-01-12 10:02 ` Johannes Thumshirn
2017-01-12 11:44 ` Sagi Grimberg
2017-01-12 11:44 ` Sagi Grimberg
2017-01-12 12:53 ` Johannes Thumshirn
2017-01-12 12:53 ` Johannes Thumshirn
2017-01-12 12:53 ` Johannes Thumshirn
2017-01-12 14:41 ` [Lsf-pc] " Sagi Grimberg
2017-01-12 14:41 ` Sagi Grimberg
2017-01-12 18:59 ` Johannes Thumshirn
2017-01-12 18:59 ` Johannes Thumshirn
2017-01-12 18:59 ` Johannes Thumshirn
2017-01-17 15:38 ` Sagi Grimberg
2017-01-17 15:38 ` Sagi Grimberg
2017-01-17 15:45 ` Sagi Grimberg
2017-01-17 15:45 ` Sagi Grimberg
2017-01-20 12:22 ` Johannes Thumshirn
2017-01-20 12:22 ` Johannes Thumshirn
2017-01-20 12:22 ` Johannes Thumshirn
2017-01-17 16:15 ` Sagi Grimberg
2017-01-17 16:15 ` Sagi Grimberg
2017-01-17 16:27 ` Johannes Thumshirn
2017-01-17 16:27 ` Johannes Thumshirn
2017-01-17 16:27 ` Johannes Thumshirn
2017-01-17 16:38 ` Sagi Grimberg
2017-01-17 16:38 ` Sagi Grimberg
2017-01-18 13:51 ` Johannes Thumshirn
2017-01-18 13:51 ` Johannes Thumshirn
2017-01-18 13:51 ` Johannes Thumshirn
2017-01-18 14:27 ` Sagi Grimberg
2017-01-18 14:27 ` Sagi Grimberg
2017-01-18 14:36 ` Andrey Kuzmin
2017-01-18 14:36 ` Andrey Kuzmin
2017-01-18 14:40 ` Sagi Grimberg
2017-01-18 14:40 ` Sagi Grimberg
2017-01-18 15:35 ` Andrey Kuzmin
2017-01-18 15:35 ` Andrey Kuzmin
2017-01-18 14:58 ` Johannes Thumshirn
2017-01-18 14:58 ` Johannes Thumshirn
2017-01-18 14:58 ` Johannes Thumshirn
2017-01-18 15:14 ` Sagi Grimberg
2017-01-18 15:14 ` Sagi Grimberg
2017-01-18 15:16 ` Johannes Thumshirn
2017-01-18 15:16 ` Johannes Thumshirn
2017-01-18 15:16 ` Johannes Thumshirn
2017-01-18 15:39 ` Hannes Reinecke
2017-01-18 15:39 ` Hannes Reinecke
2017-01-18 15:39 ` Hannes Reinecke
2017-01-19 8:12 ` Sagi Grimberg
2017-01-19 8:12 ` Sagi Grimberg
2017-01-19 8:23 ` Sagi Grimberg
2017-01-19 8:23 ` Sagi Grimberg
2017-01-19 9:18 ` Johannes Thumshirn
2017-01-19 9:18 ` Johannes Thumshirn
2017-01-19 9:18 ` Johannes Thumshirn
2017-01-19 9:13 ` Johannes Thumshirn
2017-01-19 9:13 ` Johannes Thumshirn
2017-01-19 9:13 ` Johannes Thumshirn
2017-01-17 16:44 ` Andrey Kuzmin
2017-01-17 16:50 ` Sagi Grimberg
2017-01-17 16:50 ` Sagi Grimberg
2017-01-18 14:02 ` Hannes Reinecke
2017-01-18 14:02 ` Hannes Reinecke
2017-01-20 0:13 ` Jens Axboe
2017-01-20 0:13 ` Jens Axboe
2017-01-13 15:56 ` Johannes Thumshirn
2017-01-13 15:56 ` Johannes Thumshirn
2017-01-13 15:56 ` Johannes Thumshirn
2017-01-11 15:16 ` Hannes Reinecke
2017-01-11 15:16 ` Hannes Reinecke
2017-01-11 15:16 ` Hannes Reinecke
2017-01-12 4:36 ` Stephen Bates
2017-01-12 4:44 ` Jens Axboe
2017-01-12 4:44 ` Jens Axboe
2017-01-12 4:56 ` Stephen Bates
2017-01-12 4:56 ` Stephen Bates
2017-01-19 10:57 ` Ming Lei
2017-01-19 10:57 ` Ming Lei
2017-01-19 11:03 ` Hannes Reinecke
2017-01-19 11:03 ` Hannes Reinecke
2017-01-11 16:08 ` Bart Van Assche
2017-01-11 16:08 ` Bart Van Assche
2017-01-11 16:08 ` Bart Van Assche
2017-01-11 16:12 ` hch
2017-01-11 16:12 ` hch
2017-01-11 16:15 ` Jens Axboe
2017-01-11 16:15 ` Jens Axboe
2017-01-11 16:22 ` Hannes Reinecke
2017-01-11 16:22 ` Hannes Reinecke
2017-01-11 16:22 ` Hannes Reinecke
2017-01-11 16:26 ` Bart Van Assche [this message]
2017-01-11 16:26 ` Bart Van Assche
2017-01-11 16:26 ` Bart Van Assche
2017-01-11 16:45 ` Hannes Reinecke
2017-01-11 16:45 ` Hannes Reinecke
2017-01-11 16:45 ` Hannes Reinecke
2017-01-12 8:52 ` sagi grimberg
2017-01-12 8:52 ` sagi grimberg
2017-01-11 16:14 ` Johannes Thumshirn
2017-01-11 16:14 ` Johannes Thumshirn
2017-01-11 16:14 ` Johannes Thumshirn
2017-01-12 8:41 ` Sagi Grimberg
2017-01-12 8:41 ` Sagi Grimberg
2017-01-12 8:41 ` Sagi Grimberg
2017-01-12 19:13 ` Bart Van Assche
2017-01-12 19:13 ` Bart Van Assche
2017-01-12 19:13 ` Bart Van Assche
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