* Re: [Xen-users] different number of cpus [not found] ` <20160317122234.GA23307@citrix.com> @ 2016-03-29 22:14 ` tutu sky 2016-03-30 16:27 ` Dario Faggioli 0 siblings, 1 reply; 6+ messages in thread From: tutu sky @ 2016-03-29 22:14 UTC (permalink / raw) To: Wei Liu; +Cc: Xen-devel sorry, i think i got your point. i don't know exactly which menuentry in grub2 refer to xen.gz. furthermore i deleted xen.gz when i was compiled and installed xen, because it issue an error (warning) which didn't let update-grub to be successful. after studying forums, i understood to delete it. but for the xen-4.gz is (in /boot/grub/grub.cfg): menuentry 'Ubuntu GNU/Linux, with Xen hypervisor' --class ubuntu --class gnu-linux --class gnu --class os --class xen $menuentry_id_option 'xen-gnulinux-simple-d9e946b3-a4cf-4a90-8cdf-689d19a2b869' { insmod part_msdos insmod ext2 set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 d9e946b3-a4cf-4a90-8cdf-689d19a2b869 else search --no-floppy --fs-uuid --set=root d9e946b3-a4cf-4a90-8cdf-689d19a2b869 fi echo 'Loading Xen 4 ...' if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then xen_rm_opts= else xen_rm_opts="no-real-mode edd=off" fi multiboot /boot/xen-4.gz placeholder loglvl=all guest_loglvl=all com1=115200,8n1,0x3e8,5 console=com1,vga ${xen_rm_opts} echo 'Loading Linux 3.19.0-25-generic ...' module /boot/vmlinuz-3.19.0-25-generic placeholder root=UUID=d9e946b3-a4cf-4a90-8cdf-689d19a2b869 ro find_preseed=/preseed.cfg auto noprompt priority=critical locale=en_US console=hvc0 earlyprintk=xen quiet echo 'Loading initial ramdisk ...' module --nounzip /boot/initrd.img-3.19.0-25-generic } I hope getting your meaning correctly. ________________________________________ From: Wei Liu <wei.liu2@citrix.com> Sent: Thursday, March 17, 2016 12:22 PM To: tutu sky Cc: xen-users@lists.xen.org; Wei Liu Subject: Re: [Xen-users] different number of cpus On Sat, Mar 12, 2016 at 10:18:15AM +0000, tutu sky wrote: > Hi all, > i have installed Xen and while setting number of vcpus in Dom0 to 2, then go to terminal and issue "top" command, it shows me 4 core! these all happen while i have 2 cores available in /sys/devices/system/cpu (just cpu0 and cpu1), so what does it mean? I become totally confused, as i don't know what is the exact number of cores which are assigned to Xen or Dom0. > in other words, when using "xl vcpu-set Domain-0 2" command, whys this two vcpus are showed 4 in "top" command? > How does your xen.gz command line argument in bootloader look like? > would you please give me an answer? > Thanks a lot. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xen-users] different number of cpus 2016-03-29 22:14 ` [Xen-users] different number of cpus tutu sky @ 2016-03-30 16:27 ` Dario Faggioli 2016-03-31 7:25 ` tutu sky 0 siblings, 1 reply; 6+ messages in thread From: Dario Faggioli @ 2016-03-30 16:27 UTC (permalink / raw) To: tutu sky, Wei Liu; +Cc: Xen-devel [-- Attachment #1.1: Type: text/plain, Size: 2166 bytes --] On Tue, 2016-03-29 at 22:14 +0000, tutu sky wrote: > menuentry 'Ubuntu GNU/Linux, with Xen hypervisor' --class ubuntu -- > class gnu-linux --class gnu --class os --class xen > $menuentry_id_option 'xen-gnulinux-simple-d9e946b3-a4cf-4a90-8cdf- > 689d19a2b869' { > insmod part_msdos > insmod ext2 > set root='hd0,msdos1' > if [ x$feature_platform_search_hint = xy ]; then > search --no-floppy --fs-uuid --set=root --hint- > bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint- > baremetal=ahci0,msdos1 d9e946b3-a4cf-4a90-8cdf-689d19a2b869 > else > search --no-floppy --fs-uuid --set=root d9e946b3-a4cf-4a90- > 8cdf-689d19a2b869 > fi > echo 'Loading Xen 4 ...' > if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then > xen_rm_opts= > else > xen_rm_opts="no-real-mode edd=off" > fi > multiboot /boot/xen-4.gz placeholder loglvl=all > guest_loglvl=all com1=115200,8n1,0x3e8,5 > console=com1,vga ${xen_rm_opts} > This line here is the one. It needs to contain dom0_max_vcpus=2. > On Sat, Mar 12, 2016 at 10:18:15AM +0000, tutu sky wrote: > > > > Hi all, > > i have installed Xen and while setting number of vcpus in Dom0 to > > 2, then go to terminal and issue "top" command, it shows me 4 core! > > these all happen while i have 2 cores available in > > /sys/devices/system/cpu (just cpu0 and cpu1), so what does it mean? > > I become totally confused, as i don't know what is the exact number > > of cores which are assigned to Xen or Dom0. > > in other words, when using "xl vcpu-set Domain-0 2" command, whys > > this two vcpus are showed 4 in "top" command? > > > How does your xen.gz command line argument in bootloader look like? > Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) [-- Attachment #1.2: This is a digitally signed message part --] [-- Type: application/pgp-signature, Size: 181 bytes --] [-- Attachment #2: Type: text/plain, Size: 126 bytes --] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xen-users] different number of cpus 2016-03-30 16:27 ` Dario Faggioli @ 2016-03-31 7:25 ` tutu sky 2016-03-31 11:22 ` Dario Faggioli 0 siblings, 1 reply; 6+ messages in thread From: tutu sky @ 2016-03-31 7:25 UTC (permalink / raw) To: Dario Faggioli, Wei Liu; +Cc: Xen-devel thanks Dario, But do you mean i must add the line directly in "/boot/grub/grub.cfg" ? Is there any way to do this via a variable in "/etc/default/grub" and then do "update-grub" to take effect and does the corresponding changes in "/boot/grub/grub.cfg"? Regards. ________________________________________ From: Dario Faggioli <dario.faggioli@citrix.com> Sent: Wednesday, March 30, 2016 4:27 PM To: tutu sky; Wei Liu Cc: Xen-devel@lists.xen.org Subject: Re: [Xen-devel] [Xen-users] different number of cpus On Tue, 2016-03-29 at 22:14 +0000, tutu sky wrote: > menuentry 'Ubuntu GNU/Linux, with Xen hypervisor' --class ubuntu -- > class gnu-linux --class gnu --class os --class xen > $menuentry_id_option 'xen-gnulinux-simple-d9e946b3-a4cf-4a90-8cdf- > 689d19a2b869' { > insmod part_msdos > insmod ext2 > set root='hd0,msdos1' > if [ x$feature_platform_search_hint = xy ]; then > search --no-floppy --fs-uuid --set=root --hint- > bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint- > baremetal=ahci0,msdos1 d9e946b3-a4cf-4a90-8cdf-689d19a2b869 > else > search --no-floppy --fs-uuid --set=root d9e946b3-a4cf-4a90- > 8cdf-689d19a2b869 > fi > echo 'Loading Xen 4 ...' > if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then > xen_rm_opts= > else > xen_rm_opts="no-real-mode edd=off" > fi > multiboot /boot/xen-4.gz placeholder loglvl=all > guest_loglvl=all com1=115200,8n1,0x3e8,5 > console=com1,vga ${xen_rm_opts} > This line here is the one. It needs to contain dom0_max_vcpus=2. > On Sat, Mar 12, 2016 at 10:18:15AM +0000, tutu sky wrote: > > > > Hi all, > > i have installed Xen and while setting number of vcpus in Dom0 to > > 2, then go to terminal and issue "top" command, it shows me 4 core! > > these all happen while i have 2 cores available in > > /sys/devices/system/cpu (just cpu0 and cpu1), so what does it mean? > > I become totally confused, as i don't know what is the exact number > > of cores which are assigned to Xen or Dom0. > > in other words, when using "xl vcpu-set Domain-0 2" command, whys > > this two vcpus are showed 4 in "top" command? > > > How does your xen.gz command line argument in bootloader look like? > Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xen-users] different number of cpus 2016-03-31 7:25 ` tutu sky @ 2016-03-31 11:22 ` Dario Faggioli 2016-03-31 16:35 ` tutu sky 0 siblings, 1 reply; 6+ messages in thread From: Dario Faggioli @ 2016-03-31 11:22 UTC (permalink / raw) To: tutu sky, Wei Liu; +Cc: Xen-devel [-- Attachment #1.1: Type: text/plain, Size: 776 bytes --] On Thu, 2016-03-31 at 07:25 +0000, tutu sky wrote: > thanks Dario, > But do you mean i must add the line directly in "/boot/grub/grub.cfg" > ? Is there any way to do this via a variable in "/etc/default/grub" > and then do "update-grub" to take effect and does the corresponding > changes in "/boot/grub/grub.cfg"? > Changing /etc/defaults/grub and running update-grub, is indeed the correct way of doing this. There's doc online about how to do that, e.g., here: https://wiki.debian.org/Xen Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) [-- Attachment #1.2: This is a digitally signed message part --] [-- Type: application/pgp-signature, Size: 181 bytes --] [-- Attachment #2: Type: text/plain, Size: 126 bytes --] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xen-users] different number of cpus 2016-03-31 11:22 ` Dario Faggioli @ 2016-03-31 16:35 ` tutu sky 2016-04-01 13:59 ` Dario Faggioli 0 siblings, 1 reply; 6+ messages in thread From: tutu sky @ 2016-03-31 16:35 UTC (permalink / raw) To: Dario Faggioli, Wei Liu; +Cc: Xen-devel Thanks a lot. That works. I think all boot parameters can be found here: http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html you may want to use them or not, and if i don't make mistake, it does not make difference which linux distro is used. Regards. ________________________________________ From: Dario Faggioli <dario.faggioli@citrix.com> Sent: Thursday, March 31, 2016 11:22 AM To: tutu sky; Wei Liu Cc: Xen-devel@lists.xen.org Subject: Re: [Xen-devel] [Xen-users] different number of cpus On Thu, 2016-03-31 at 07:25 +0000, tutu sky wrote: > thanks Dario, > But do you mean i must add the line directly in "/boot/grub/grub.cfg" > ? Is there any way to do this via a variable in "/etc/default/grub" > and then do "update-grub" to take effect and does the corresponding > changes in "/boot/grub/grub.cfg"? > Changing /etc/defaults/grub and running update-grub, is indeed the correct way of doing this. There's doc online about how to do that, e.g., here: https://wiki.debian.org/Xen Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Xen-users] different number of cpus 2016-03-31 16:35 ` tutu sky @ 2016-04-01 13:59 ` Dario Faggioli 0 siblings, 0 replies; 6+ messages in thread From: Dario Faggioli @ 2016-04-01 13:59 UTC (permalink / raw) To: tutu sky, Wei Liu; +Cc: Xen-devel [-- Attachment #1.1: Type: text/plain, Size: 832 bytes --] On Thu, 2016-03-31 at 16:35 +0000, tutu sky wrote: > Thanks a lot. That works. > I think all boot parameters can be found here: > http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.htm > l > Indeed. > you may want to use them or not, and if i don't make mistake, it does > not make difference which linux distro is used. > These are parameters that are effective on Xen, of course there is no relationship with any particular distribution... Actually, it doesn't even matter whether you're using Linux as dom0, or something else! Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) [-- Attachment #1.2: This is a digitally signed message part --] [-- Type: application/pgp-signature, Size: 181 bytes --] [-- Attachment #2: Type: text/plain, Size: 126 bytes --] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 6+ messages in thread
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[not found] ` <20160317122234.GA23307@citrix.com>
2016-03-29 22:14 ` [Xen-users] different number of cpus tutu sky
2016-03-30 16:27 ` Dario Faggioli
2016-03-31 7:25 ` tutu sky
2016-03-31 11:22 ` Dario Faggioli
2016-03-31 16:35 ` tutu sky
2016-04-01 13:59 ` Dario Faggioli
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