Date: Thu, 9 Jan 2020 19:44:05 +0000 From: Matt Churchyard <matt.churchyard@userve.net> To: Yamagi Burmeister <lists@yamagi.org>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Subject: RE: bhyve issues on Dell C6220 node Message-ID: <88763a7e67f44c9eb963ee5dee63dd87@SERVER.ad.usd-group.com> In-Reply-To: <20200109195756.55ac58ef7e3ae85354ce78e8@yamagi.org> References: <baa7d5aeac12445195c1044e6e3d90dd@SERVER.ad.usd-group.com> <202001082137.008LbZl9091675@gndrsh.dnsmgr.net> <CACLnyCLvm8cxkPg-7chFZNFx0o3K124A3rkktj--MqUa=nTqkg@mail.gmail.com> <1998222a141e44bbbbc5d295e1c1bb34@SERVER.ad.usd-group.com> <20200109195756.55ac58ef7e3ae85354ce78e8@yamagi.org>
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Hi, > >2016 is slow (even slower doing windows updates). 2019 is much better. A tip I have found is a minimum of 1 cpu, 2 cores and 4 threads to get decent speed from that OS (more CPUs in bhyve >tends to make performance worse - in my observations - in 2016). Also, use the Virtio collection from RedHat for vionet and viostor. We are currently using 0.1.171 without issue. The ahci >emulation in itself is extremely slow. NVMe and virtio is really the only way to go. > > Is there anything else I can check here? I haven’t got round to testing networking yet but I’m using nvme for the disk. > It’s basically unusable and there is no way I could put anything production on it. Just highlighting an icon on the desktop takes several seconds. >Windows is slow when running on Intel CPUs that don't support APICv. >That are (nearly?) all desktop CPUs, all Xeons before Sandy Bridge and some Xeons after it. The problem is that Bhyve doesn't implement TPR shadowing. I'm >currently working on it. The review can be found >here: https://reviews.freebsd.org/D22942 The speedup is about factor 6! >I've received some feedback in a private mail, a second version that adds TPR thresholds can be found in my Github branch here: > https://github.com/Yamagi/freebsd/commits/wip/tpr_shadowing >A backport to 12.1 (the branch also includes the Intel SpeedShift patches from https://reviews.freebsd.org/D18028) is here: >>https://github.com/Yamagi/freebsd/commits/production/12.1 >I've applied it to 2 of my production servers about 4 hours ago. Looks good so far. I'll update the review when I'm sure that it doesn't break anything, maybe >early next week. Thanks Yamagi, That's brilliant and provides me some hope that I may not have to completely abandon windows guests after all... These servers are just sat next to my desk in testing at the moment so I'll see if I can have a go at applying the patches and testing it in the morning. Regards, Matthelp
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