Thiago Camargo Martins Cordeiro
2008-Sep-20 02:57 UTC
[Xen-users] Re: My domU cpuinfo shows "cache seize: 16KB" ater upgrading to Xen-3.3.0... but in Xen-3.2 it has 2048KB!
No one knows about this?! It''s normal for domU in Xen-3.3 to have only 16KB of CPU cache size? Thanks! Thiagi 2008/9/18 Thiago Camargo Martins Cordeiro <thiagocmartinsc@gmail.com>> Hi folks! > > After upgrading my Xen-3.2.0 to new Xen-3.3.0/Linux-2.6.18.8-xen-3.3.0 my > domU /proc/cpuinfo shows only: > > administrativo@vsrvXX:~$ cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 6 > model name : Intel(R) Pentium(R) D CPU 3.40GHz > stepping : 4 > cpu MHz : 3391.500 > *cache size : 16 KB* > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > fpu : yes > fpu_exception : yes > cpuid level : 6 > wp : yes > flags : fpu de tsc msr pae cx8 apic sep cmov pat clflush acpi mmx > fxsr sse sse2 ss ht syscall nx lm constant_tsc pni cid cx16 lahf_lm > bogomips : 6785.83 > clflush size : 64 > cache_alignment : 128 > address sizes : 36 bits physical, 48 bits virtual > power management: > > But before upgrade, it''s cache was the same of my dom0, look my dom0 > cpuinfo: > > root@hyper02:~# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 6 > model name : Intel(R) Pentium(R) D CPU 3.40GHz > stepping : 4 > cpu MHz : 3391.498 > *cache size : 2048 KB* > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > fpu : yes > fpu_exception : yes > cpuid level : 6 > wp : yes > flags : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush acpi > mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up pni est cid cx16 > lahf_lm > bogomips : 6785.50 > clflush size : 64 > cache_alignment : 128 > address sizes : 36 bits physical, 48 bits virtual > power management: > > How to give more cpu cache to my domU in new Xen-3.3.0? My domUs are very > slow now! > I do not use HVM, all my Linux domUs are paravirtualized. > > Thanks! > Thiago >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Dustin Henning
2008-Sep-22 15:50 UTC
RE: [Xen-users] Re: My domU cpuinfo shows "cache seize: 16KB" ater upgrading to Xen-3.3.0... but in Xen-3.2 it has 2048KB!
I havent tried Xen 3.3.0, as I stick with the F8 repo Xen since it is working. However, have you tried a different kernel? Perhaps yours needs recompiled to detect the greater processor cache. I really don''t know, so I''m not going to say it couldn''t be Xen, but I do know that there are a lot of processor options when you compile a kernel. What I don''t know is which differences those processor options make. Dustin From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Thiago Camargo Martins Cordeiro Sent: Friday, September 19, 2008 22:57 To: xen-users Subject: [Xen-users] Re: My domU cpuinfo shows "cache seize: 16KB" ater upgrading to Xen-3.3.0... but in Xen-3.2 it has 2048KB! No one knows about this?! It''s normal for domU in Xen-3.3 to have only 16KB of CPU cache size? Thanks! Thiagi 2008/9/18 Thiago Camargo Martins Cordeiro <thiagocmartinsc@gmail.com> Hi folks! After upgrading my Xen-3.2.0 to new Xen-3.3.0/Linux-2.6.18.8-xen-3.3.0 my domU /proc/cpuinfo shows only: administrativo@vsrvXX:~$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Intel(R) Pentium(R) D CPU 3.40GHz stepping : 4 cpu MHz : 3391.500 cache size : 16 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 6 wp : yes flags : fpu de tsc msr pae cx8 apic sep cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc pni cid cx16 lahf_lm bogomips : 6785.83 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: But before upgrade, it''s cache was the same of my dom0, look my dom0 cpuinfo: root@hyper02:~# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Intel(R) Pentium(R) D CPU 3.40GHz stepping : 4 cpu MHz : 3391.498 cache size : 2048 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 6 wp : yes flags : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up pni est cid cx16 lahf_lm bogomips : 6785.50 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 48 bits virtual power management: How to give more cpu cache to my domU in new Xen-3.3.0? My domUs are very slow now! I do not use HVM, all my Linux domUs are paravirtualized. Thanks! Thiago _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Thiago Camargo Martins Cordeiro
2008-Sep-22 17:11 UTC
Re: [Xen-users] Re: My domU cpuinfo shows "cache seize: 16KB" ater upgrading to Xen-3.3.0... but in Xen-3.2 it has 2048KB!
I just download xen-3.3.0 and do: make world;make install. After that, I have configured modules, initramdisk, Grub, has I do in the xen-3.2.0, and yes, I have mercurial and all build-deps installed... I can''t see why my domU is showing only 16KB and my dom0 shows 2048KB... I''m just using the Xen defaults for Kernel and Hypervisor. 2008/9/22 Dustin Henning <Dustin.Henning@prd-inc.com>> I haven''t tried Xen 3.3.0, as I stick with the F8 repo Xen since it > is working. However, have you tried a different kernel? Perhaps yours > needs recompiled to detect the greater processor cache. I really don''t > know, so I''m not going to say it couldn''t be Xen, but I do know that there > are a lot of processor options when you compile a kernel. What I don''t > know > is which differences those processor options make. > Dustin > > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Thiago Camargo > Martins Cordeiro > Sent: Friday, September 19, 2008 22:57 > To: xen-users > Subject: [Xen-users] Re: My domU cpuinfo shows "cache seize: 16KB" ater > upgrading to Xen-3.3.0... but in Xen-3.2 it has 2048KB! > > No one knows about this?! > It''s normal for domU in Xen-3.3 to have only 16KB of CPU cache size? > > Thanks! > Thiagi > 2008/9/18 Thiago Camargo Martins Cordeiro <thiagocmartinsc@gmail.com> > Hi folks! > > After upgrading my Xen-3.2.0 to new Xen-3.3.0/Linux-2.6.18.8-xen-3.3.0 my > domU /proc/cpuinfo shows only: > > administrativo@vsrvXX:~$ cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 6 > model name : Intel(R) Pentium(R) D CPU 3.40GHz > stepping : 4 > cpu MHz : 3391.500 > cache size : 16 KB > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > fpu : yes > fpu_exception : yes > cpuid level : 6 > wp : yes > flags : fpu de tsc msr pae cx8 apic sep cmov pat clflush acpi mmx > fxsr sse sse2 ss ht syscall nx lm constant_tsc pni cid cx16 lahf_lm > bogomips : 6785.83 > clflush size : 64 > cache_alignment : 128 > address sizes : 36 bits physical, 48 bits virtual > power management: > > But before upgrade, it''s cache was the same of my dom0, look my dom0 > cpuinfo: > > root@hyper02:~# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 6 > model name : Intel(R) Pentium(R) D CPU 3.40GHz > stepping : 4 > cpu MHz : 3391.498 > cache size : 2048 KB > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > fpu : yes > fpu_exception : yes > cpuid level : 6 > wp : yes > flags : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush acpi > mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up pni est cid cx16 > lahf_lm > bogomips : 6785.50 > clflush size : 64 > cache_alignment : 128 > address sizes : 36 bits physical, 48 bits virtual > power management: > > How to give more cpu cache to my domU in new Xen-3.3.0? My domUs are very > slow now! > I do not use HVM, all my Linux domUs are paravirtualized. > > Thanks! > Thiago > > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users