使用XenServer 7进行turbo的注意事项

嗨！
CPU turbo模式对于性能非常重要，特别是自几年前推出AVX 2.0（Haswell）以来增加的涡轮增压。
在XenServer配置方面，Turbo模式也有点棘手，而且这是使用具有高基频的CPU的一个很好的理由。
基频的顶级型号消耗大量功率，但仅适用于工作站型号。
如果我理解下面正确使用AVX 2的博客文章实际上是PV客户端的限制，并且在XenServer 7中引入HVM客户端现在支持AVX 2（除其他外）。
https://www.citrix.com/blogs/201 ... -of-a-great-future/
总而言之，从Xen 4.4（XenServer 6.5）迁移到Xen 4.6（XenServer 7.0）为AVX 2 turbo（Intel Haswell或更高版本，即大多数2年或更新的服务器）提供了更好的支持。
但是，它确实要求服务器不与任何具有较旧CPU的服务器共用，因为这会影响池功能级别。
应该有很多XenServer服务器，基本频率低的CPU和高涡轮跨度，据我所见，大多数原始设备制造商都推动了这一点。
如果由于有限的涡轮增压支持和/或复杂的配置要求，很多客户也会因性能不佳而受到伤害。
然后，也许我错过了一些东西。
GRID团队或其他任何人对此有何评论？
您是否注意到，如果使用XenServer 7的井上服务器的涡轮增压效果比以前更好？

以上来自于谷歌翻译

以下为原文

Hi!

CPU turbo mode is important for performance, especially with the increased turbo spans since AVX 2.0 was introduced a couple of years ago (Haswell).

Turbo mode is also a bit tricky when it comes to XenServer configuration and that's been a good reason for using CPUs with a high base frequency instead. The top models for base frequency consume a lot of power however and have only been available with workstation models.

If I understand the below blog post correctly utilizing AVX 2 has in fact been a restriction in PV guests and introducing HVM guests in XenServer 7 now supports AVX 2 (among other things).

https://www.citrix.com/blogs/201 ... -of-a-great-future/

In sum, the move from Xen 4.4 (XenServer 6.5) to Xen 4.6 (XenServer 7.0) provides better support for AVX 2 turbo (Intel Haswell or later, i.e. most servers 2 years old or newer).

It does, however, require that the server is not pooled with any server that has older CPUs as that would impact the pool feature level.

There should be a lot of XenServer servers out there with low base frequency haswell CPUs and high turbo spans as that has been pushed forward by most of the OEMs as far as I've seen. It wouldn't be unlikely then if a lot of those customers are also hurting from bad performance due to limited turbo support and/or complex configuration requirements.

Then again, perhaps I'm missing something. Any comments on this from the GRID team or anyone else? Have you noticed if turbo on haswell servers seems to perform better with XenServer 7 than previously?

赵媛

2018-9-25 15:12:27

嗨托尼，
我没有听到任何方式，但会ping XenSever团队。
最好的地方可能是在XenServer GPU论坛上：http：//discussions.citrix.com/forum/523-gpu-technologies/
有趣的是，我听说turbo并没有频繁使用旧的XenServer，但是有很多关于如何正确配置的建议，所以它可以http://support.citrix.com/article/CTX200390
最好的祝愿，
雷切尔

以上来自于谷歌翻译

以下为原文

Hi Tony,

I haven't heard anything either way but will ping the XenSever team. the best place to ask is probably on the XenServer GPU forum: http://discussions.citrix.com/forum/523-gpu-technologies/

Anecdotally I heard that turbo didn't frequently kick in on older XenServer's but there is plenty of advice on how to correctly configure so it can http://support.citrix.com/article/CTX200390

Best wishes,
Rachel

孙琪

2018-9-25 15:25:16

嗨雷切尔
谢谢，如果您（或其他任何人）收到任何更新，将会很有趣。
当然，如果我听到任何事情和/或在夏天花时间在实验室中进行测试，我也会更新。
谢谢
托尼

以上来自于谷歌翻译

以下为原文

Hi Rachel

Thank you, if you (or anyone else) receive any updates it would be interesting to know. I'll update as well of course if I hear anything and/or get the time during the summer to run the tests in the lab.

Thanks
Tony

谢丹丹

回帖（2）

赵媛

孙琪

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