From: Avi Kivity <avi@redhat.com>
To: Blue Swirl <blauwirbel@gmail.com>
Cc: Lluís <xscript@gmx.net>, "Dhaval Giani" <dhaval.giani@gmail.com>,
"Stefan Hajnoczi" <stefanha@linux.vnet.ibm.com>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH, RFC] trace: implement guest tracepoint passthrough
Date: Wed, 31 Aug 2011 11:38:50 +0300 [thread overview]
Message-ID: <4E5DF31A.1@redhat.com> (raw)
In-Reply-To: <CAAu8pHtJPe-zwhsy+AA5dF4va2SVZBcv+_wZMcOEJD1Vk6B7bw@mail.gmail.com>
On 08/26/2011 10:06 PM, Blue Swirl wrote:
> Let guests inject tracepoint data via fw_cfg device.
>
>
At least on x86, fw_cfg is pretty slow, involving multiple exits. IMO,
for kvm, even one exit per tracepoint is too high. We need to use a
shared memory transport with a way to order guest/host events later on
(by using a clock).
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-08-31 8:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-26 19:06 [Qemu-devel] [PATCH, RFC] trace: implement guest tracepoint passthrough Blue Swirl
2011-08-29 12:17 ` Stefan Hajnoczi
2011-08-29 12:51 ` Lluís
2011-08-30 18:58 ` Blue Swirl
2011-08-30 18:43 ` Blue Swirl
2011-08-31 7:24 ` Stefan Hajnoczi
2011-08-31 8:38 ` Avi Kivity [this message]
2011-08-31 9:08 ` Stefan Hajnoczi
2011-08-31 9:11 ` Avi Kivity
2011-08-31 13:38 ` Stefan Hajnoczi
2011-08-31 18:01 ` Dhaval Giani
2011-08-31 10:54 ` Jan Kiszka
2011-08-31 17:58 ` Blue Swirl
2011-08-31 18:00 ` Dhaval Giani
2011-09-03 8:53 ` Blue Swirl
2011-09-03 9:26 ` Dhaval Giani
2011-09-03 10:55 ` Blue Swirl
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