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Date:      Fri, 03 Feb 2017 20:21:29 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-amd64@FreeBSD.org
Subject:   [Bug 216760] Memory Management Freebsd Guest On QEMU-KVM HOst
Message-ID:  <bug-216760-6@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216760

            Bug ID: 216760
           Summary: Memory Management Freebsd Guest On QEMU-KVM HOst
           Product: Base System
           Version: 11.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: kvanbiesen@gmail.com
                CC: freebsd-amd64@FreeBSD.org
                CC: freebsd-amd64@FreeBSD.org

Performance Is Insanely low on when you install freebsd on a QEMU-KVM

command to test:
sysbench --num-threads=3D1 --test=3Dmemory --memory-total-size=3D1G run

FREEBSD 11 on QEMU-KVM

Operations performed=3D 1048576 (61139.84 ops/sec)
1024.00 transferred (59.71 MB/sec)

UBUNTU 11 on identical KVM:

Operations performed=3D 1048576 (2718486.33 ops/sec)
1024.00 transferred (2654.77 MB/sec)

FREEBSD on bare metal:
Around 2700MB/s

I tested this on several installations; BBother freebsd 10 and 11. On Diffe=
rent
KVM's, all the same results. Freebsd speeds are more than 60 times slower.=
=20

Another user has tested this on servers KVM as in this reddit topic:
https://www.reddit.com/r/freebsd/comments/5rtf05/abysmal_memory_perfomance_=
witch_freebsd_under/

FReebsd as guest under vmware and virtualbox performs as normal (speeds way
over 2000MB)

Gonna file a bug report with QEMU as well

--=20
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