From: Andrii Anisov <andrii.anisov@gmail.com>
To: Dario Faggioli <dfaggioli@suse.com>
Cc: nd@arm.com, Stefano Stabellini <sstabellini@kernel.org>,
andrii_anisov@epam.com, Milan Boberic <milanboberic94@gmail.com>,
Julien Grall <julien.grall@gmail.com>,
Julien Grall <julien.grall@arm.com>,
Meng Xu <xumengpanda@gmail.com>,
xen-devel@lists.xenproject.org,
Stefano Stabellini <stefano.stabellini@xilinx.com>
Subject: Re: Xen optimization
Date: Thu, 13 Dec 2018 09:48:06 +0200 [thread overview]
Message-ID: <0cf198d3-7f47-38a6-a4dd-00189306e9da@gmail.com> (raw)
In-Reply-To: <ecf2c1ac2bff1292836ad6fc9675316e20b60525.camel@suse.com>
On 12.12.18 19:59, Dario Faggioli wrote:
> Yeah, and although difficult to admit/see the reason why, I think this
> looks like it is coming from something we do in Xen. And since you say
> you have an old Xen version that works, I really see bisection as the
> way to go...
> Not sure I'm getting. Are you saying that you somehow verified that on
> 4.10 vcpus don't move? But on 4.10 you have pinning that works, don't
> you?
Yes, the pinning works (and is reasonably used) in our setup we are providing to a customer. That setup is based on 4.10 release.
For my IRQ latency work, I used a simplified setup with the only Dom0 and the same XEN as in the customer's setup.
I was too lazy to set up pinning for my experimental setup from the beginning and later I found out that VCPUs were not migrating.
> Or are you saying you've verified that vcpus don't move, on 4.10, even
> without doing the pinning? If yes, can I ask how?
Yeh, it took me some time to recall that from my memory:)
When I tried using xentrace to profile interrupt path, I noticed that `current` non-idle VCPU is not changed for a particular PCPU.
--
Sincerely,
Andrii Anisov.
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next prev parent reply other threads:[~2018-12-13 7:48 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-09 10:59 Xen optimization Milan Boberic
2018-10-09 16:46 ` Dario Faggioli
2018-10-10 11:22 ` Milan Boberic
2018-10-10 11:25 ` Milan Boberic
2018-10-10 16:41 ` Meng Xu
2018-10-11 7:36 ` Milan Boberic
2018-10-11 12:17 ` Milan Boberic
2018-10-11 17:05 ` Dario Faggioli
2018-10-11 15:39 ` Meng Xu
2018-10-11 22:29 ` Stefano Stabellini
2018-10-12 15:33 ` Milan Boberic
2018-10-12 16:36 ` Julien Grall
2018-10-12 17:43 ` Stefano Stabellini
2018-10-13 16:01 ` Milan Boberic
2018-10-14 22:46 ` Stefano Stabellini
2018-10-15 12:27 ` Milan Boberic
2018-10-16 7:13 ` Stefano Stabellini
2018-10-15 8:14 ` Julien Grall
2018-10-15 12:50 ` Julien Grall
2018-10-15 13:01 ` Milan Boberic
2018-10-15 13:03 ` Julien Grall
2018-10-17 15:19 ` Milan Boberic
2018-10-19 21:02 ` Stefano Stabellini
2018-10-19 22:41 ` Dario Faggioli
2018-10-22 15:02 ` Milan Boberic
2018-10-22 17:52 ` Stefano Stabellini
2018-10-23 8:58 ` Milan Boberic
2018-10-24 0:24 ` Stefano Stabellini
2018-10-25 10:09 ` Milan Boberic
2018-10-25 11:30 ` Julien Grall
2018-10-25 12:36 ` Milan Boberic
2018-10-25 13:44 ` Dario Faggioli
2018-10-25 14:00 ` Julien Grall
2018-10-25 14:04 ` Julien Grall
2018-10-25 14:47 ` Milan Boberic
2018-10-25 14:51 ` Julien Grall
2018-10-25 16:18 ` Xen optimizationcy Stefano Stabellini
2018-10-25 11:09 ` Xen optimization Julien Grall
2018-10-25 16:15 ` Stefano Stabellini
2018-10-26 19:12 ` Julien Grall
2018-10-26 20:41 ` Stefano Stabellini
2018-10-29 12:29 ` Milan Boberic
2018-10-31 18:59 ` Julien Grall
2018-10-31 20:35 ` Milan Boberic
2018-10-31 21:16 ` Julien Grall
2018-11-01 20:20 ` Stefano Stabellini
2018-11-01 20:35 ` Julien Grall
2018-11-20 11:33 ` Andrii Anisov
2018-11-27 21:27 ` Stefano Stabellini
2018-11-29 8:19 ` Andrii Anisov
2018-12-10 10:58 ` Andrii Anisov
2018-12-10 11:54 ` Julien Grall
2018-12-10 12:23 ` Andrii Anisov
2018-12-11 12:27 ` Julien Grall
2018-12-11 16:56 ` Dario Faggioli
2018-12-12 9:39 ` Andrii Anisov
2018-12-12 17:10 ` Dario Faggioli
2018-12-12 17:32 ` Andrii Anisov
2018-12-12 17:59 ` Dario Faggioli
2018-12-13 7:48 ` Andrii Anisov [this message]
2018-12-11 18:39 ` Stefano Stabellini
2018-12-11 19:05 ` Julien Grall
2018-12-11 19:29 ` Stefano Stabellini
2018-12-12 9:46 ` Andrii Anisov
2018-12-12 10:41 ` Andrii Anisov
2018-12-12 17:39 ` Stefano Stabellini
2018-12-12 17:47 ` Andrii Anisov
2018-12-12 18:01 ` Stefano Stabellini
2018-12-12 9:34 ` Andrii Anisov
2018-11-07 13:14 ` Julien Grall
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