From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fantu Subject: Re: Low performance and some problem with kernel 2.6.32.13 and xen 4.0-rc1 Date: Fri, 28 May 2010 04:27:33 -0700 (PDT) Message-ID: <28705622.post@talk.nabble.com> References: <28704783.post@talk.nabble.com> <20100528095633.GG17817@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20100528095633.GG17817@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org thanks for reply About blktap i not uderstand, always this error: May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:790: blktapctrl: v1.0.0 May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [raw image (aio)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [raw image (sync)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [vmware image (vmdk)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [ramdisk image (ram)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [qcow disk (qcow)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found driver= : [qcow2 disk (qcow2)] May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl_linux.c:92: couldn'= t find device number for 'blktap0' May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:859: couldn't ope= n blktap interface May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:922: Unable to start blktapctrl But module there is in kernel and is load (see lsmod) i have try also xen 3.4.3, kernel 2.6.31 and 2.6.32 with some different config, always with blktap option, also with =3Dy and also try with sysfs deprecated option but always nothing I found also 1 problem on save of 1 domU and some of this line in log: May 28 12:55:35 cpmcOR01AV kernel: [ 3000.882349] hrtimer: interrupt took 4279522 ns Here the syslog and kern.log if can help:=20 http://old.nabble.com/file/p28705622/kern.log kern.log =20 http://old.nabble.com/file/p28705622/syslog syslog=20 And xend.log when stop some minute for problem on one domU save:=20 http://old.nabble.com/file/p28705622/xend.log xend.log=20 Pasi K=C3=A4rkk=C3=A4inen wrote: >=20 > On Fri, May 28, 2010 at 02:45:04AM -0700, Fantu wrote: >>=20 >> Server is Dell T610 with last bios (2.0.13) >> Dom0: Lenny 64 bit, kernel 2.6.32.13, xen 4.0-rc1 >> Kernel is last commit of jeremy git xen/stable-2.6.32.x with this config= :=20 >> http://old.nabble.com/file/p28704783/config-2.6.32.13 config-2.6.32.13= =20 >> lspci -vvv: http://old.nabble.com/file/p28704783/lspcivvv.log >> lspcivvv.log=20 >> dmidecode: http://old.nabble.com/file/p28704783/dmidecode.log >> dmidecode.log=20 >> dmesg: http://old.nabble.com/file/p28704783/dmesg dmesg=20 >> lsmod: http://old.nabble.com/file/p28704783/lsmod.log lsmod.log=20 >> xend log: http://old.nabble.com/file/p28704783/xend.log xend.log=20 >> menu.lst: >> title Xen 4 / Debian GNU/Linux, kernel 2.6.32.13 >> root (hd0,0) >> kernel /boot/xen.gz dom0_mem=3D2560M >> module /boot/vmlinuz-2.6.32.13 root=3DLABEL=3Droot-backup2 ro >> nomodeset >> module /boot/initrd.img-2.6.32.13 >>=20 >> The server run 12 domU windows xp with gplpv 0.11.0.213, all work >> On dom0 blktap not work (write about in other topic) and i must chage >> domU >> disk from tap:aio to file, is one or the problem about performance? >> With not set of dom0 memory and dom0 balloning have "freeze" with last >> msg >> calltrace about out of memory, i set dom0 memory in menu.lst and disable >> dom0 balloning, is necessary more ram that 2.5gb for dom0? >> >=20 > You really don't need 2,5 GB for dom0. > Start with 1024 MB. You might be able to go down to 512 MB or so. >=20 > It really depends what kind of tools you run in dom0. >=20 > Also remember that file: driver for guest disks uses dom0 page cache, > so it may appear that a lot of dom0 memory is used when using file: drive= r > since dom0 page cache will use *all* the free memory.. so increasing=20 > dom0 memory just makes you use more of the memory as cache. >=20 > You really should get tap:aio: working instead. But I guess you open > another > thread about it. >=20 >> There are some option in .config of kernel wrong or not good? >> with c state option in bios enable system is inusable, now i disable it >> but >> this is kernel, xen or bios problem? >>=20 >> I hope this information helps improve the kernel and xen, tell me if nee= d >> another information >>=20 >> Thanks for any reply about my questions >>=20 >=20 > -- Pasi >=20 >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >=20 >=20 --=20 View this message in context: http://old.nabble.com/Low-performance-and-som= e-problem-with-kernel-2.6.32.13-and-xen-4.0-rc1-tp28704783p28705622.html Sent from the Xen - Dev mailing list archive at Nabble.com.