From: Stefan Hajnoczi <stefanha@gmail.com>
To: Wei Li <wei.d.li@oracle.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Dongli Zhang <dongli.zhang@oracle.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Following up questions related to QEMU and I/O Thread
Date: Wed, 1 May 2019 12:36:50 -0400 [thread overview]
Message-ID: <20190501163650.GF21155@stefanha-x1.localdomain> (raw)
In-Reply-To: <1A278B43-AA26-43B4-B6C2-17231E780BBE@oracle.com>
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On Mon, Apr 29, 2019 at 10:56:31AM -0700, Wei Li wrote:
> Does this mean the performance could be improved via adding Batch I/O submission support in Guest driver side which will be able to reduce the number of virtqueue kicks?
Yes, I think so. It's not obvious to me how a Linux SCSI driver is
supposed to implement batching though. The .queuecommand API doesn't
seem to include information relevant to batching.
Stefan
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WARNING: multiple messages have this Message-ID (diff)
From: Stefan Hajnoczi <stefanha@gmail.com>
To: Wei Li <wei.d.li@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>,
Dongli Zhang <dongli.zhang@oracle.com>
Subject: Re: [Qemu-devel] Following up questions related to QEMU and I/O Thread
Date: Wed, 1 May 2019 12:36:50 -0400 [thread overview]
Message-ID: <20190501163650.GF21155@stefanha-x1.localdomain> (raw)
Message-ID: <20190501163650.mx7UKaKJHiYAUez2dsq-qCjH39XketFgU5DBTAvckQo@z> (raw)
In-Reply-To: <1A278B43-AA26-43B4-B6C2-17231E780BBE@oracle.com>
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On Mon, Apr 29, 2019 at 10:56:31AM -0700, Wei Li wrote:
> Does this mean the performance could be improved via adding Batch I/O submission support in Guest driver side which will be able to reduce the number of virtqueue kicks?
Yes, I think so. It's not obvious to me how a Linux SCSI driver is
supposed to implement batching though. The .queuecommand API doesn't
seem to include information relevant to batching.
Stefan
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next prev parent reply other threads:[~2019-05-01 16:37 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 17:33 [Qemu-devel] Following up questions related to QEMU and I/O Thread Wei Li
2019-03-05 17:29 ` Stefan Hajnoczi
[not found] ` <2D7F11D0-4A02-4A0F-961D-854240376B17@oracle.com>
2019-04-01 9:07 ` Stefan Hajnoczi
2019-04-05 21:09 ` Wei Li
2019-04-05 21:09 ` Wei Li
2019-04-16 14:01 ` Paolo Bonzini
2019-04-16 14:01 ` Paolo Bonzini
2019-04-17 1:38 ` Wei Li
2019-04-17 1:38 ` Wei Li
2019-04-17 12:17 ` Paolo Bonzini
2019-04-17 12:17 ` Paolo Bonzini
2019-04-18 3:34 ` Wei Li
2019-04-18 3:34 ` Wei Li
[not found] ` <CC372DF3-1AC6-46B5-98A5-21159497034A@oracle.com>
2019-04-15 17:34 ` Wei Li
2019-04-15 17:34 ` Wei Li
2019-04-15 23:23 ` Dongli Zhang
2019-04-15 23:23 ` Dongli Zhang
2019-04-16 9:20 ` Stefan Hajnoczi
2019-04-16 9:20 ` Stefan Hajnoczi
2019-04-17 1:42 ` Wei Li
2019-04-17 1:42 ` Wei Li
[not found] ` <8E5AF770-69ED-4D44-8A25-B51344996D9E@oracle.com>
2019-04-23 4:21 ` Wei Li
2019-04-23 4:21 ` Wei Li
2019-04-23 12:04 ` Stefan Hajnoczi
2019-04-23 12:04 ` Stefan Hajnoczi
2019-04-26 8:14 ` Paolo Bonzini
2019-04-26 8:14 ` Paolo Bonzini
2019-04-26 23:02 ` Wei Li
2019-04-26 23:02 ` Wei Li
2019-04-27 4:24 ` Paolo Bonzini
2019-04-27 4:24 ` Paolo Bonzini
2019-04-29 17:49 ` Wei Li
2019-04-29 17:49 ` Wei Li
2019-04-29 13:40 ` Stefan Hajnoczi
2019-04-29 13:40 ` Stefan Hajnoczi
2019-04-29 17:56 ` Wei Li
2019-04-29 17:56 ` Wei Li
2019-05-01 16:36 ` Stefan Hajnoczi [this message]
2019-05-01 16:36 ` Stefan Hajnoczi
2019-05-03 16:21 ` Wei Li
2019-05-03 16:21 ` Wei Li
2019-05-03 18:05 ` Paolo Bonzini
2019-05-03 18:05 ` Paolo Bonzini
2019-05-03 18:11 ` Wei Li
2019-05-03 18:11 ` Wei Li
2019-04-30 11:21 ` Paolo Bonzini
2019-04-30 11:21 ` Paolo Bonzini
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