On Tue, Sep 6, 2016 at 5:26 PM, Gabriel Ozaki <[email protected]> wrote:
> Hi Yaniv > > This results is averange in sysbench, my machine for example gets > 1.3905Mb/sec, i don't know how this test really works and i will search > about it > > So i try to make a* bonnie++ test* ( reference > http://support.commgate.net/index.php?/Knowledgebase/Article/View/212 ): > > Xenserver speeds: > Write speed: 91076 KB/sec > ReWrite speed: 57885 KB/sec > Read speed: 215457 KB/sec (Strange, too high) > Num of Blocks: 632.4 > > Ovirt Speeds: > Write speed: 111597 KB/sec (22% more then xenserver) > ReWrite speed: 73402 KB/sec (26% more then xenserver) > Read speed: 121537 KB/sec (44% less then xenserver) > Num of Blocks: 537.2 ( 15% less then xenserver) > > > result: a draw? > Perhaps - depends on what you wish to measure. > > > And* DD test *( reference: https://romanrm.net/dd-benchmark )*:* > [root@xenserver teste]# echo 2 > /proc/sys/vm/drop_caches && sync > [root@xenserver teste]# dd bs=1M count=256 if=/dev/zero of=test > conv=fdatasync > fdatasync is the wrong choice - it still caches (but again, I'm not sure what you are trying to measure). You should use direct IO (oflag=direct) if you are interested in pure IO data path performance . Note that most applications do not: 1. Write sequentially (especially not VMs) 2. Write 1MB blocks. 256+0 registros de entrada > 256+0 registros de saída > 268435456 bytes (268 MB) copiados, 1,40111 s, 192 MB/s (Again, too high) > Perhaps the disk is caching? > > [root@ovirt teste]# echo 2 > /proc/sys/vm/drop_caches && sync > [root@ovirt teste]# dd bs=1M count=256 if=/dev/zero of=test conv=fdatasync > 256+0 registros de entrada > 256+0 registros de saída > 268435456 bytes (268 MB) copiados, 2,31288 s, 116 MB/s (Really fair, the > host result is 124 MB/s) > > > *HDparm *(FAIL on xenserver) > [root@xenserver teste]# hdparm -Tt /dev/xvda1 > > /dev/xvda1: > Timing cached reads: 25724 MB in 2.00 seconds = 12882.77 MB/sec > Timing buffered disk reads: 2984 MB in 3.00 seconds = 994.43 MB/sec ( 8 > times the expect value, something is very wrong) > > [root@ovirt teste]# hdparm -Tt /dev/vda1 > > /dev/vda1: > Timing cached reads: 25042 MB in 2.00 seconds = 12540.21 MB/sec > Timing buffered disk reads: 306 MB in 3.01 seconds = 101.66 MB/sec(ok > result) > > > There is something strange in xenserver affecting the results, probably > the best choice is close the thread and start the studies about benchmarks > Agreed. It's not easy, it's sometimes more art than science, but first of all you need to define what you wish to benchmark exactly. I warmly suggest you look more into real life applications rather than synthetic benchmarks, but if you insist, I warmly recommend fio ( https://github.com/axboe/fio) HTH, Y. > > Thanks > > > > > > > 2016-09-05 12:01 GMT-03:00 Yaniv Kaul <[email protected]>: > >> >> >> On Mon, Sep 5, 2016 at 1:45 PM, Gabriel Ozaki <[email protected]> >> wrote: >> >>> Hi Yaniv and Sandro >>> >>> The disk is in the same machine then ovirt-engine >>> >> >> I'm looking back at your results, and something is terribly wrong there: >> For example, sysbench: >> >> Host result: 2.9843Mb/sec >> Ovirt result: 1.1561Mb/sec >> Xenserver result: 2.9006Mb/sec >> >> This is slower than a USB1 disk on key performance. I don't know what to >> make of it, but it's completely bogus. Even plain QEMU can get better >> results than this. >> And the 2nd benchmark: >> >> >> **The novabench test:* >> Ovirt result: 79Mb/s >> Xenserver result: 101Mb/s >> >> This is better, but still very slow. If I translate it to MB/s, it's >> ~10-12MBs - still very very slow. >> If, however, this is MB/sec, then this makes sense - and is probably as >> much as you can get from a single spindle. >> The difference between XenServer and oVirt are more likely have to do >> with caching than anything else. I don't know what the caching settings of >> XenServer - can you ensure no caching ('direct IO') is used? >> >> >> >>> Thanks >>> >>> >>> >>> >>> >>> 2016-09-02 15:31 GMT-03:00 Yaniv Kaul <[email protected]>: >>> >>>> >>>> >>>> On Fri, Sep 2, 2016 at 6:11 PM, Gabriel Ozaki < >>>> [email protected]> wrote: >>>> >>>>> Hi Yaniv >>>>> >>>>> Sorry guys, i don't explain well on my first mail, i notice a bad IO >>>>> performance on *disk* benchmarks, the network are working really fine >>>>> >>>> >>>> But where is the disk? If it's across the network, then network is >>>> involved and is certainly a bottleneck. >>>> Y. >>>> >>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> 2016-09-02 12:04 GMT-03:00 Yaniv Kaul <[email protected]>: >>>>> >>>>>> On Fri, Sep 2, 2016 at 5:33 PM, Gabriel Ozaki < >>>>>> [email protected]> wrote: >>>>>> >>>>>>> Hi Nir, thanks for the answer >>>>>>> >>>>>>> >>>>>>> *The nfs server is in the host?* >>>>>>> Yes, i choose NFS to use as storage on ovirt host >>>>>>> >>>>>>> *- Is this 2.9GiB/s or 2.9 MiB/s?* >>>>>>> Is MiB/s, i put the full test on paste bin >>>>>>> centos guest on ovirt: >>>>>>> http://pastebin.com/d48qfvuf >>>>>>> >>>>>>> centos guest on xenserver: >>>>>>> http://pastebin.com/gqN3du29 >>>>>>> >>>>>>> how the test works: >>>>>>> https://www.howtoforge.com/how-to-benchmark-your-system-cpu- >>>>>>> file-io-mysql-with-sysbench >>>>>>> >>>>>>> *- Are you testing using NFS in all versions?* >>>>>>> i am using the v3 version >>>>>>> >>>>>>> *- What is the disk format?* >>>>>>> partion size format >>>>>>> / 20Gb xfs >>>>>>> swap 2 Gb xfs >>>>>>> /dados rest of disk xfs (note, this is the partition where i save >>>>>>> the ISOs,exports and VM disks) >>>>>>> >>>>>>> >>>>>>> *- How do you test io on the host?* >>>>>>> I do a clean install of centos and do the test before i install the >>>>>>> ovirt >>>>>>> the test: >>>>>>> http://pastebin.com/7RKU7778 >>>>>>> >>>>>>> *- What kind of nic is used? (1G, 10G?)* >>>>>>> Is only a 100mbps :( >>>>>>> >>>>>> >>>>>> 100Mbps will not get you more than several MB/s. 11MB/s on a very >>>>>> bright day... >>>>>> >>>>>>> >>>>>>> *We need much more details to understand what do you test here.* >>>>>>> I have problems to upload the benchmark test on orvirt to novabench >>>>>>> site, so here is the screenshot(i make a mistake on the last email i get >>>>>>> the wrong value), is 86 Mb/s: >>>>>>> >>>>>> >>>>>> Which is not possible on the wire. Unless it's VM to VM? And the >>>>>> storage is local, which means it's the bandwidth of the physical disk >>>>>> itself? >>>>>> Y. >>>>>> >>>>>> >>>>>> >>>>>>> >>>>>>> >>>>>>> And the novabench on xenserver: >>>>>>> https://novabench.com/compare.php?id=ba8dd628e4042dfc1f3d396 >>>>>>> 70b164ab11061671 >>>>>>> >>>>>>> *- For Xenserver - detailed description of the vm and the storage >>>>>>> configuration?* >>>>>>> The host is the same(i install xenserver, do the tests before i >>>>>>> install centos), the VM i use the same configuration of ovirt, 2 cores, >>>>>>> 4 >>>>>>> Gb of ram and 60 Gb disk(in the default xenserver SR) >>>>>>> >>>>>>> *- For ovirt, can you share the vm command line, available in >>>>>>> /var/log/libvirt/qemu/vmname.**log?* >>>>>>> 2016-09-01 12:50:28.268+0000: starting up libvirt version: 1.2.17, >>>>>>> package: 13.el7_2.5 (CentOS BuildSystem <http://bugs.centos.org>, >>>>>>> 2016-06-23-14:23:27, worker1.bsys.centos.org), qemu version: 2.3.0 >>>>>>> (qemu-kvm-ev-2.3.0-31.el7.16.1) >>>>>>> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin >>>>>>> QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name vmcentos -S -machine >>>>>>> pc-i440fx-rhel7.2.0,accel=kvm,usb=off -cpu Haswell-noTSX -m >>>>>>> size=4194304k,slots=16,maxmem=4294967296k -realtime mlock=off -smp >>>>>>> 2,maxcpus=16,sockets=16,cores=1,threads=1 -numa >>>>>>> node,nodeid=0,cpus=0-1,mem=4096 -uuid >>>>>>> 21872e4b-7699-4502-b1ef-2c058eff1c3c >>>>>>> -smbios type=1,manufacturer=oVirt,product=oVirt >>>>>>> Node,version=7-2.1511.el7.centos.2.10,serial=03AA02FC-0414-0 >>>>>>> 5F8-D906-710700080009,uuid=21872e4b-7699-4502-b1ef-2c058eff1c3c >>>>>>> -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/va >>>>>>> r/lib/libvirt/qemu/domain-vmcentos/monitor.sock,server,nowait -mon >>>>>>> chardev=charmonitor,id=monitor,mode=control -rtc >>>>>>> base=2016-09-01T09:50:28,driftfix=slew -global >>>>>>> kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot >>>>>>> strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 >>>>>>> -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 -device >>>>>>> virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x4 >>>>>>> -drive file=/rhev/data-center/mnt/ovirt.kemi.intranet:_dados_iso/52 >>>>>>> ee9f87-9d38-48ec-8003-193262f81994/images/11111111-1111-1111 >>>>>>> -1111-111111111111/CentOS-7-x86_64-NetInstall-1511.iso,if=no >>>>>>> ne,id=drive-ide0-1-0,readonly=on,format=raw -device >>>>>>> ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=2 >>>>>>> -drive file=/rhev/data-center/00000001-0001-0001-0001-0000000002bb/ >>>>>>> 4ccdd1f3-ee79-4425-b6ed-5774643003fa/images/2ecfcf18-ae84-4e >>>>>>> 73-922f-28b9cda9e6e1/800f05bf-23f7-4c9d-8c1d-b2503592875f,if >>>>>>> =none,id=drive-virtio-disk0,format=raw,serial=2ecfcf18-ae84- >>>>>>> 4e73-922f-28b9cda9e6e1,cache=none,werror=stop,rerror=stop,aio=threads >>>>>>> -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virti >>>>>>> o-disk0,id=virtio-disk0,bootindex=1 -chardev >>>>>>> socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/2 >>>>>>> 1872e4b-7699-4502-b1ef-2c058eff1c3c.com.redhat.rhevm.vdsm,server,nowait >>>>>>> -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel >>>>>>> 0,id=channel0,name=com.redhat.rhevm.vdsm -chardev >>>>>>> socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/2 >>>>>>> 1872e4b-7699-4502-b1ef-2c058eff1c3c.org.qemu.guest_agent.0,server,nowait >>>>>>> -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel >>>>>>> 1,id=channel1,name=org.qemu.guest_agent.0 -device >>>>>>> usb-tablet,id=input0 -vnc 192.168.0.189:0,password -k pt-br -device >>>>>>> VGA,id=video0,vgamem_mb=16,bus=pci.0,addr=0x2 -device >>>>>>> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on >>>>>>> 2016-09-01T12:50:28.307173Z qemu-kvm: warning: CPU(s) not present in >>>>>>> any NUMA nodes: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>>>>>> 2016-09-01T12:50:28.307371Z qemu-kvm: warning: All CPU(s) up to >>>>>>> maxcpus should be described in NUMA config >>>>>>> qemu: terminating on signal 15 from pid 1 >>>>>>> 2016-09-01 19:13:47.899+0000: shutting down >>>>>>> >>>>>>> >>>>>>> Thanks >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> 2016-09-02 11:05 GMT-03:00 Nir Soffer <[email protected]>: >>>>>>> >>>>>>>> On Fri, Sep 2, 2016 at 4:44 PM, Gabriel Ozaki < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> Hi >>>>>>>>> i am trying Ovirt 4.0 and i am getting some strange results when >>>>>>>>> comparing with Xenserver >>>>>>>>> >>>>>>>>> **The host machine* >>>>>>>>> Intel Core i5-4440 3.10GHz running at 3093 MHz >>>>>>>>> 8 Gb of RAM (1x8) >>>>>>>>> 500 Gb of Disk (seagate st500dm002 7200rpm) >>>>>>>>> CentOS 7 (netinstall for the most updated and stable packages) >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> **How i am testing:* >>>>>>>>> I choose two benchmark tools, sysbench(epel-repo on centos) and >>>>>>>>> novabench(for windows guest, https://novabench.com ), then i make >>>>>>>>> a clean install of xenserver and create two guests(CentOS and Windows >>>>>>>>> 7 SP1) >>>>>>>>> >>>>>>>>> >>>>>>>>> **The Guest specs* >>>>>>>>> 2 cores >>>>>>>>> 4 Gb of RAM >>>>>>>>> 60 Gb of disk (using virtIO in a NFS storage) >>>>>>>>> >>>>>>>> >>>>>>>> The nfs server is in the host? >>>>>>>> >>>>>>>> >>>>>>>>> Important note: only the testing guest are up on benchmark and i >>>>>>>>> have installed the drivers in guest >>>>>>>>> >>>>>>>>> >>>>>>>>> **The Sysbench disk test(creates 10Gb of data and do the bench):* >>>>>>>>> # sysbench --test=fileio --file-total-size=10G prepare >>>>>>>>> # sysbench --test=fileio --file-total-size=10G >>>>>>>>> --file-test-mode=rndrw --init-rng=on --max-time=300 --max-requests=0 >>>>>>>>> run >>>>>>>>> >>>>>>>>> Host result: 2.9843Mb/sec >>>>>>>>> Ovirt result: 1.1561Mb/sec >>>>>>>>> Xenserver result: 2.9006Mb/sec >>>>>>>>> >>>>>>>> >>>>>>>> - Is this 2.9GiB/s or 2.9 MiB/s? >>>>>>>> - Are you testing using NFS in all versions? >>>>>>>> - What is the disk format? >>>>>>>> - How do you test io on the host? >>>>>>>> - What kind of nic is used? (1G, 10G?) >>>>>>>> >>>>>>>> >>>>>>>>> >>>>>>>>> **The novabench test:* >>>>>>>>> Ovirt result: 79Mb/s >>>>>>>>> Xenserver result: 101Mb/s >>>>>>>>> >>>>>>>> >>>>>>>> We need much more details to understand what do you test here. >>>>>>>> >>>>>>>> - For ovirt, can you share the vm command line, available in >>>>>>>> /var/log/libvirt/qemu/vmname.log? >>>>>>>> - For Xenserver - detailed description of the vm and the storage >>>>>>>> configuration? >>>>>>>> >>>>>>>> Nir >>>>>>>> >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Users mailing list >>>>>>> [email protected] >>>>>>> http://lists.ovirt.org/mailman/listinfo/users >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
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