Date: Wed, 01 Jul 2020 10:03:31 +0000 From: bugzilla-noreply@freebsd.org To: ports-bugs@FreeBSD.org Subject: [Bug 247690] sysutils/openzfs-kmod performance problem Message-ID: <bug-247690-7788@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247690 Bug ID: 247690 Summary: sysutils/openzfs-kmod performance problem Product: Ports & Packages Version: Latest Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: Individual Port(s) Assignee: freqlabs@FreeBSD.org Reporter: spam123@bitbert.com Assignee: freqlabs@FreeBSD.org Flags: maintainer-feedback?(freqlabs@FreeBSD.org) Created attachment 216107 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D216107&action= =3Dedit logs + sample test script I started lots of benchmarks concerning ZFS. Among the test candidates was a Notebook with a single SSD disk where I compared the performance of FreeBSDs ZFS shipped with the base system versus openzfs-kmod. I realized that openzfs-kmod is much slower compared to FreeBSDs base zfs. I used the tool benchmarks/fio (3.20). If I pick one test, of course on the same hardware, the random-read-write t= est fired up with the "sync"-ioengine and ashift=3D12, by the command "fio --name=3Drandrw --rw=3Drandrw --direct=3D1 --ioengine=3Dsync --bs=3D8k --nu= mjobs=3D2 --rwmixread=3D80 --size=3D1G --runtime=3D600 --group_reporting" native-zfs = delivers 81.7MiB/s read and 20.5MiB/s write bandwidth whereas openzfs-kmod only reac= hes 9665KiB/s read and 2422KiB/s write bandwidth. The difference is quite big on all my tests, with combinations of io-engines posixaio, psync, mmap, sync, pvsync, vsync; zfs with ashift=3D9 and ashift= =3D12. This was not really a scientific test, but still showed the obvious differe= nce in performance. fio seems to be a linux tool, however, works on FreeBSD - I don't know how the different io-engines are implemented, but it shows the difference in all tests. Tests on normal hdds are to come too, but they take of course significantly longer. I am also testing geli/zfs-encryption on FreeBSD and Linux (luks encryption). This is out of scope here, just for info that I can provide lo= gs of different zfs combinations (2-disk raidz1/zmirror, 3-disk raidz1) at a l= ater date if desired. Attached are 24 log files which include the results of some fio tests (and = a dd command output/timing). Also, see the included unenc-openzfs.sh for how/what tests were done. --=20 You are receiving this mail because: You are the assignee for the bug.=
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