Date: Sun, 19 Apr 2020 03:55:03 -0400 From: =?UTF-8?Q?Orestes_Leal_Rodr=c3=adguez?= <leal@cs.uky.edu> To: freebsd-virtualization@freebsd.org Subject: =?UTF-8?Q?Re=3a_bhyve_11=2e1-=3estable/12_ZVOL-WinGuest_slowdown_?= =?UTF-8?Q?=e2=80=93_r358848_far_beyond_imagination?= Message-ID: <7efa3e4f-c935-50eb-b7cf-67cbededf722@cs.uky.edu> In-Reply-To: <3af0db9e-9044-5bbb-50d2-ef251ed231a1@omnilan.de> References: <3af0db9e-9044-5bbb-50d2-ef251ed231a1@omnilan.de>
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I also have tested this today by moving from 12.0-STABLE to -CURRENT today (r360076M). I also use ZVOLs with virtio-blk(s) for the VM's block devices. I can say this is a pretty impressive work, kudos to the developers. this Windows 10 VM now feels like it got a hardware upgrade (a big one). Kudos for merging r358848. Orestes On 4/18/20 10:51 AM, Harry Schmalzbauer wrote: > Hello, > > after upgrading my ancient ivy-bridge (Xeon E3, no vAPIC CPU support) > from 11.1 to stable/12 I noteced a quiet heavy slowdown of my windows > guest (Server 2012R2). > > The guest-disk is a ZVOL backed virtio-blk device, which I suspected > suffers from performance regressions – especially since I use them in > volmode=dev. > But then I found the guest spending almost one full vCPU cycles in > interrupt handling during light SQL load; something I rarely see on > windows. No idea what caused the slowdown, but I remembered r358848 – > which isn't MFCd yet, but I gave it a try. > Word's can't describe the surprise. Never imagined any Win-Guest on > bhyve can feel like that… > Thanks a lot to Sir Burmeister et. al. > > Hope this will land in stable/12 soon. > > Thanks, > > -Harry > > _______________________________________________ > freebsd-virtualization@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to > "freebsd-virtualization-unsubscribe@freebsd.org"
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