From: Gaurav Sharma <gauravs.2010@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Queries on dataplane mechanism
Date: Thu, 23 Jun 2016 20:56:34 +0530 [thread overview]
Message-ID: <CABiB5K7u96CVnaPzS4V2dRQoMFVOCSgL1r6Li+0zFV2fBdoc7A@mail.gmail.com> (raw)
Hi,
I am trying to explore how the data plane mechanism works in QEMU. I
understand the behavior of QEMU big lock. Can someone clarify the following
w.r.t. to data plane :
1. Currently only virtio-blk-pci and virtio-scsi-pci have data plane
enabled ?
2. From qemu 2.1.0 data plane is enabled by default. I specify the
following options in the command line to enable :
-enable-kvm -drive if=none,id=drive1,file=file_name -object
iothread,id=iothread2 -device
virtio-blk-pci,id=drv0,drive=drive1,iothread=iothread2
Is the above syntax correct ?
3. What is the best possible scenario to test data plane ? Currently, I
have a test set up wherein i have two different devices [dev1 and dev2]. If
i process a write to dev1 which i made blocking by putting a sleep
statement, will i be able to process write on dev2 ? My understanding is
that as in case of dataplane we have a different event loop, i should be
able to process write on dev2. Is this correct ?
I am using qemu 2.2.0 on CentOS 7.1 with kvm version 1.5.3 and using Debian
3.2.8 as guest OS.
Regards.
next reply other threads:[~2016-06-23 15:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-23 15:26 Gaurav Sharma [this message]
2016-06-24 10:15 ` [Qemu-devel] Queries on dataplane mechanism Stefan Hajnoczi
2016-06-28 9:06 ` Gaurav Sharma
2016-07-15 14:17 ` Stefan Hajnoczi
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