Date: Mon, 06 Feb 2017 11:43:36 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 216760] poor performance on QEMU-KVM host Message-ID: <bug-216760-27103-Ym7Yc1sGfN@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-216760-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-216760-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216760 --- Comment #4 from rainer@ultra-secure.de --- Oh, I've never tried that. (freebsd11 </root>) 0 # dc3dd wipe=3D/dev/md0=20 dc3dd 7.2.641 started at 2017-02-06 12:37:44 +0100 compiled options: command line: dc3dd wipe=3D/dev/md0 device size: 8388608 sectors (probed), 4,294,967,296 bytes sector size: 512 bytes (probed) 4294967296 bytes ( 4 G ) copied ( 100% ), 8 s, 507 M/s=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20 input results for pattern `00': 8388608 sectors in output results for device `/dev/md0': 8388608 sectors out dc3dd completed at 2017-02-06 12:37:52 +0100 You're right, memory performance is still sufficient on XenServer. This is real hardware: root@bsd1-build-prod:~ # dc3dd wipe=3D/dev/md0 dc3dd 7.2.641 started at 2017-02-06 12:40:58 +0100 compiled options: command line: dc3dd wipe=3D/dev/md0 device size: 8388608 sectors (probed), 4,294,967,296 bytes sector size: 512 bytes (probed) 4294967296 bytes ( 4 G ) copied ( 100% ), 6 s, 656 M/s=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20 input results for pattern `00': 8388608 sectors in output results for device `/dev/md0': 8388608 sectors out dc3dd completed at 2017-02-06 12:41:04 +0100 Though one generation later, so faster RAM, faster CPUs. I'd be happy with that kind of disk-performance loss in a DomU :-( --=20 You are receiving this mail because: You are the assignee for the bug.=
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