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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Exactly set dom0/U memory, increase vcpu count
On 03/04/2013 07:08 PM, Jan Hejl wrote: > Hi Michal, Hi > > 1) Could you please post your dom0 kernel config options related to XEN? > Simply with "zgrep XEN /proc/config.gz" or "grep XEN > /usr/src/linux/.config" ? rajvir3 dom0 # grep XEN .config CONFIG_XEN=y CONFIG_XEN_DOM0=y CONFIG_XEN_PRIVILEGED_GUEST=y CONFIG_XEN_PVHVM=y CONFIG_XEN_MAX_DOMAIN_MEMORY=128 CONFIG_XEN_SAVE_RESTORE=y # CONFIG_XEN_DEBUG_FS is not set CONFIG_PCI_XEN=y CONFIG_XEN_PCIDEV_FRONTEND=y CONFIG_XEN_BLKDEV_FRONTEND=y CONFIG_XEN_BLKDEV_BACKEND=y CONFIG_XEN_NETDEV_FRONTEND=y CONFIG_XEN_NETDEV_BACKEND=y CONFIG_HVC_XEN=y # CONFIG_XEN_WDT is not set CONFIG_XEN_BALLOON=y CONFIG_XEN_SCRUB_PAGES=y CONFIG_XEN_DEV_EVTCHN=y CONFIG_XEN_BACKEND=y CONFIG_XENFS=y CONFIG_XEN_COMPAT_XENFS=y CONFIG_XEN_SYS_HYPERVISOR=y CONFIG_XEN_XENBUS_FRONTEND=y CONFIG_XEN_GNTDEV=m CONFIG_XEN_GRANT_DEV_ALLOC=m CONFIG_SWIOTLB_XEN=y CONFIG_XEN_PCIDEV_BACKEND=m > > 2) Is CONFIG_HOTPLUG_CPU enabled in your kernel image? Yes rajvir3 dom0 # grep CONFIG_HOTPLUG_CPU .config CONFIG_HOTPLUG_CPU=y Michal > > Thanks > Jan > > On 03/04/2013 06:23 PM, Michal Fiala wrote: >> hallo, >> >> I have updated xen server to >> >> xen-4.2.1-r2 >> xen-tools-4.2.1-r1 >> kernel gentoo-sources-3.2.39 >> >> I have found 2 problems >> >> 1) Can not exactly set dom0, domU memory >> >> I dedicate 4G of memory to dom0 via kernel parameter: >> >> dom0_mem=4G,max:4G dom0_max_vcpus=4 dom0_vcpus_pin >> >> Bud the real total memory is set to 2618M after reboot. I have found >> article describing this behavior >> (http://wiki.xen.org/wiki/Do%EF%BB%BFm0_Memory_%E2%80%94_Where_It_Has_Not_Gone), >> >> so I have run >> >> echo $((4*1024*1024)) > >> /sys/devices/system/xen_memory/xen_memory0/target_kb >> >> The total memory was se to 3687M. This is better, but not enough. >> >> I have tested kernel 3.7, there is not such problem. I would like to use >> longterm kernel 3.2 so I would like to stay with 3.2. >> >> Similar problem exists with domU, config looks like >> >> kernel = '/etc/xen/kernels/linux-3.2.39-gentoo' >> name = 'test1' >> memory = '4000' >> maxmem = '12000' >> vcpus = '8' >> cpus = '^0,^1,^2,^3' >> extra = 'elevator=noop gentoo=nodevfs' >> root = '/dev/xvda1 ro' >> disk = [ >> 'phy:/dev/vg1/test1_root,xvda1,w', >> 'phy:/dev/vg1/test1_var,xvda2,w', >> ] >> vif = [ >> 'mac=00:16:3e:24:11:38,bridge=br0', >> ] >> >> After boot, test1 domain has 3704M total memory (free -m), xm list test1 >> shows 4000M. >> >> When I increase memory amount via xm mem-set test1 8000, then xm list >> test1 really shows 8000M, but domU has 7704M total memory (free -m). >> >> from xend.log >> [2013-03-04 18:10:18 4627] DEBUG (XendDomainInfo:1467) Setting memory >> target of domain test1 (1) to 8000 MiB. >> >> 2) I am not able to increase vcpu count to domU. >> After boot domU test1, it has really 8 vcpus, I am able to decrease >> vcpus by xm vcpu-set test1 4. Cpus count inside test1 really decreases >> to 4. Now I would like to increase vcpu count via xm vcpu-list test1 6, >> but unsuccessfully. >> >> rajvir3 configs # xm vcpu-list test1 >> Name ID VCPU CPU State Time(s) CPU >> Affinity >> test1 1 0 15 -b- 3.7 12-23 >> test1 1 1 23 -b- 2.8 12-23 >> test1 1 2 18 -b- 1.2 12-23 >> test1 1 3 20 -b- 1.2 12-23 >> test1 1 4 16 -b- 1.0 12-23 >> test1 1 5 12 -b- 3.5 12-23 >> test1 1 6 19 -b- 0.9 12-23 >> test1 1 7 14 -b- 0.9 12-23 >> >> rajvir3 configs # xm vcpu-set test1 4 >> >> rajvir3 configs # xm vcpu-list test1 >> Name ID VCPU CPU State Time(s) CPU >> Affinity >> test1 1 0 15 -b- 3.7 12-23 >> test1 1 1 23 -b- 2.9 12-23 >> test1 1 2 18 -b- 1.3 12-23 >> test1 1 3 20 -b- 1.2 12-23 >> test1 1 4 - --p 1.0 12-23 >> test1 1 5 - --p 3.5 12-23 >> test1 1 6 - --p 1.0 12-23 >> test1 1 7 - --p 0.9 12-23 >> >> rajvir3 configs # xm vcpu-set test1 6 >> >> rajvir3 configs # xm vcpu-list test1 >> Name ID VCPU CPU State Time(s) CPU >> Affinity >> test1 1 0 15 -b- 3.8 12-23 >> test1 1 1 23 -b- 2.9 12-23 >> test1 1 2 18 -b- 1.3 12-23 >> test1 1 3 20 -b- 1.3 12-23 >> test1 1 4 - --p 1.0 12-23 >> test1 1 5 - --p 3.5 12-23 >> test1 1 6 - --p 1.0 12-23 >> test1 1 7 - --p 0.9 12-23 >> >> from xend.log >> >> [2013-03-04 18:12:58 4627] INFO (XendDomainInfo:1978) Set VCPU count on >> domain test1 to 4 >> [2013-03-04 18:14:51 4627] INFO (XendDomainInfo:1978) Set VCPU count on >> domain test1 to 6 >> >> I was not able to increase vcpu count also in kernel 3.7. >> >> Where could be the problem? >> >> Thanks >> >> Michal >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@xxxxxxxxxxxxx >> http://lists.xen.org/xen-users > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxx > http://lists.xen.org/xen-users > _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx http://lists.xen.org/xen-users
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