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Re: [Xen-devel] Xen (both x86 and Arm) Community Call: Feb 13 - 16:00 - 17:00 UTC - Call for Agenda Items
- To: "Rich Persaud" <persaur@xxxxxxxxx>
- From: "Jan Beulich" <JBeulich@xxxxxxxx>
- Date: Wed, 13 Feb 2019 03:11:22 -0700
- Cc: davorin.mista@xxxxxxxxxx, Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, anastassios.nanos@xxxxxxxxx, Matt Spencer <Matt.Spencer@xxxxxxx>, edgar.iglesias@xxxxxxxxxx, JanakarajanNatarajan <jnataraj@xxxxxxx>, robin.randhawa@xxxxxxx, Daniel Kiper <daniel.kiper@xxxxxxxxxx>, mirela.simonovic@xxxxxxxxxx, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Lars Kurth <lars.kurth.xen@xxxxxxxxx>, Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>, Christopher Clark <christopher.w.clark@xxxxxxxxx>, Paul Durrant <paul.durrant@xxxxxxxxxx>, committers@xxxxxxxxxxxxxx, vfachin@xxxxxxxxxxxxxx, intel-xen@xxxxxxxxx, Jarvis Roach <Jarvis.Roach@xxxxxxxxxxxxxxx>, Artem Mygaiev <artem_mygaiev@xxxxxxxx>, Brian Woods <brian.woods@xxxxxxx>, john.ji@xxxxxxxxx, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Stewart Hildebrand <Stewart.Hildebrand@xxxxxxxxxxxxxxx>, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 13 Feb 2019 10:11:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
>>> On 13.02.19 at 02:31, <persaur@xxxxxxxxx> wrote:
> 4. NVME passthrough performance: this is improved when VMEXITs are avoided
> by using "posted interrupts" [1] available on Broadwell and later Xeon
> processors or AWS nested hypervisor "metal" [2]. For commodity x86 CPUs
> which do not have posted interrupts, Linux [3] and Hyper-V [4] have used
> "hybrid polling" to achieve good I/O performance at the cost of CPU cycles.
> Is this applicable to Xen?
The number of references you make alone already suggest to me that
this is not a topic usefully discussed on a phone call. May I suggest to
use the mailing list for topics requiring a lot of context?
Jan
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