search for: bvt

Are there any examples of bvt scheduler parameters usage? If I understand it right, bvt provides me with option to scale domain''s CPU usage. Eg. I have 2 (non-zero) domains pinned to the same CPU. Can I assign eg. 30% of CPU time to domain 1 and 70% to domain 2? (I mean in peaks when both domains are not idle and re...

Hi everyone, I understand BVT is not the default scheduler anymore, but perhaps this would be of interest to some people. Some changes in the current BVT scheduler compared to the BVT code in Xen 3.0 has affected its correctness. In the original (Xen 3.0) BVT scheduler the weights resulted in correct CPU allocations. However,...

Hello I''m in trouble using the bvt scheduler with the command line. the command "xm sched-bvt help" explain that it need 6 argument but that''s all. I have read a previous conversation for bvt example with command line, but it doesn''t work I...

Hi folks BVT and EDF are both xen scheduler. It is expected that administrator will choose the scheduler most appropriate to their application and configure the machine to boot with that scheduler. I just wonder What''s the main difference between BVT and EDF? What kind of scenario to use them? Thanks...

hi all, im am trying to allocate cpu to the various domains using a bvt scheduler. so now lets say i want to give the first virtual machine a weight of 1 and the second a weight of 2. this should result in domain1 using 33% of the cpu and domain2 66%. however since xm sched-bvt takes inverse of the weights as input so i do 1/1 and 1/2 and hence do "xm sched-bvt vm...

...inly used when a vcpu fails to acquire a spinlock, yielding to the lock holder instead of spinning. I ported the ppc64 spinlock implementation for the i386 linux portion. In implementing the hypercall, I''ve been trying to figure out how to get the scheduler (I''ve only played with bvt) to run the vcpu passed in the hypercall (after some validation) but I''ve run into various bad state situations (do_softirq pending != 0 assert, ''!active_ac_timer(timer)'' failed , and __task_on_runqueue(prev) failed) which tells me I don''t fully understand all of...

Hi, I have a naive question with the xen BVT scheduler. Supposing I have only one guest domain runnning on domain 0 and with the xm bvt command I have allocated cpu units in the ratio 9:1 to domain 0 and domain 1(say) respectively. Now I create another guest domain. How much CPU share it (or subsequent domains created after it) will get? ~$...

...Specification: The following can be added to the Xen configuration files. 1.CPU WEIGHT [OPTIONAL] cpu_weight = cpu weight value -sets the cpu time ratio to be allocated to the domain -the scale and the default value may vary according to the scheduler used. No modification has been made for the bvt scheduler. --credit scheduler: 1~65535 (default:256) --bvt scheduler: float value (default:1.0) 2.CAP [OPTIONAL] cpu_cap= value -this is only valid when using the credit scheduler -allots the maximum CPU usage percentage for the domain -the domain will use -- (value x 0.01) physical CPUs ex: 50...

Hi All , I am using older xen version xen-3.0.2 which supports BVT and SEDF scheduler I want to add credit and boost credit scheduler support in xen-3.0.2 . Please let me know if any (Credit scheduler) patch is available for xen-3.0.2 Thanks, Akhilesh _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://li...

>From: Tristan Gingold [mailto:Tristan.Gingold@bull.net] >Sent: 2006年4月21日 15:26 >> > >> >See how we solve this on x86 near the top of do_boot_cpu() in >> >arch/x86/smpboot.c. Essentially we allocate extra idle domains on >> >demand to give us enough idle vcpus for one per physical cpu. >> > >> > -- Keir >> >> Yes,

...;'t create extra domains. Therefore it there are more >CPUs >> >than >> >VCPUs, something goes wrong... >> >> Yes, there''s only one idle domain now. However I''m not sure >> why something will go wrong when NR_CPUS > MAX_VIRT_CPUS. >bvt has per VCPU data. if #VCPU > #MAX_VIRT_CPUS, bvt >reads/writes beyond the >bounds! > >Tristan. OK, I see. Thanks, Kevin _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...;m running Xen on an SMP machine. Couple of things: a) is dom0 pinned to a particular CPU? if so which? can I control the choice? b) with the 2.6.10 Xenolinux kernel, cat /proc/cpuinfo shows only a single CPU on my SMP machine. Is this a known problem/behavior? c) if I understand correctly, the BVT scheduler parameters are CPU specific -- they don''t aggregate over the machine. So if I assign some weights to domains, they will work properly if both domains are pinned to the same CPU. Is that correct? TiA! -- Diwaker Gupta http://resolute.ucsd.edu/diwaker --------------------------...

Hi all, Here are some benchmarks that I''ve done using Xen. However, before I get started, let me explain some of configuration details... Xen Version SPECjbb WebBench Linux Distribution Debian 3.1 HT disabled Linux Kernel 2.6.12.2 Host Patch CK3s Here are the initial benchmarks SPECJBB WebBench 1 Thread 1 Client 2 Clients 4 Clients 8 Clients BOPS TPS TPS TPS TPS Host

...see this, could you forward me a copy of the Xen 1.2 CD you offered to do earlier? I''d like to see to see which initrd techniques you used, if any. My GRUB config looks like: title xen kernel /boot/xen dom0_mem=318464 com1=115200,8n1 console=com1,vga ignorebiostables nmi=ignore sched=bvt conswitch=xy noreboot module /boot/xen0-vmlinuz ramdisk_size=203776 root=/dev/ram0 max_loop=96 rw console=ttyS0 vga=extended module /boot/xen0-initrd I can provide access to the ISO if anyone cares, though it''s obviously non-functional currently. __ __ ____ ___ \ \/...

Some users are hitting this panic in network_alloc_rx_buffers() when running a big network intensive app: /* Check return status of HYPERVISOR_dom_mem_op(). */ if ( rx_mcl[nr_pfns].args[5] != nr_pfns ) panic("Unable to reduce memory reservation\n"); I''m not clear on what is happening here. Are the domains changing size? Which memory reservation is being

We cannot startup IA32/IA32pae unmodified linux guest OS. Booting 32bit VMX domain will stop at printing "ACPI: Unable to locate RSDP". Booting 32pae VMX domain will get a kernel panic. No abnormal info found in serial output. It''s interesting that sometime we can boot Windows 2003. Booting Windows SP1/SP2 Guest will crash with attached serial output. Bests Jeff

...es on the new box, I keep getting rejected "cannot browse the shares". This happens whether I browse from a Windows or Linux system. What am I doing wrong? Here is the smb.conf file that was working in Fedora 11, but not Fedora 16. [global] workgroup = AUSTIN server string = SQABVT Samba Server log file = /var/log/samba/%m.log max log size = 10000 security = share socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 local master = yes os level = 1 domain master = no preferred master = yes dns proxy = no password level = 8 username level...

...Processor Specification v1.4 (XEN) Virtual Wire compatibility mode. (XEN) OEM ID: INTEL Product ID: I865G/GE/PE APIC at: 0xFEE00000 (XEN) I/O APIC #2 Version 32 at 0xFEC00000. (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs (XEN) Processors: 1 (XEN) Using scheduler: Borrowed Virtual Time (bvt) (XEN) Initializing CPU#0 (XEN) Detected 2600.173 MHz processor. (XEN) CPU0: Before vendor init, caps: bfebfbff 00000000 00000000, vendor = 0 (XEN) CPU#0: Physical ID: 0, Logical ID: 0 (XEN) CPU caps: bfebfbff 00000000 00000000 00000000 (XEN) CPU0 booted (XEN) enabled ExtINT on CPU#0 (XEN) ESR va...

...raise XendError(str(ex)) diff -r f14e12b3327a tools/python/xen/xm/main.py --- a/tools/python/xen/xm/main.py Tue Mar 7 23:09:23 2006 +++ b/tools/python/xen/xm/main.py Tue Mar 7 17:18:16 2006 @@ -83,7 +83,17 @@ parameters""" sched_bvt_ctxallow_help = """sched-bvt-ctxallow <Allow> Set the BVT scheduler context switch allowance""" -sched_sedf_help = "sched-sedf <Parameters> Set simple EDF parameters" +sched_sedf_help = "sch...

...verride. (XEN) ACPI: IRQ2 used by override. (XEN) ACPI: IRQ11 used by override. (XEN) Enabling APIC mode: Flat. Using 4 I/O APICs (XEN) Using ACPI (MADT) for SMP configuration information (XEN) Initializing CPU#0 (XEN) Detected 3600.316 MHz processor. (XEN) Using scheduler: Borrowed Virtual Time (bvt) (XEN) CPU: Trace cache: 12K uops, L1 D cache: 16K (XEN) CPU: L2 cache: 1024K (XEN) CPU: Physical Processor ID: 0 (XEN) CPUU 3.60GHz stepping 01 (XEN) Total of 4 processors activated. (XEN) ENABLING IO-APIC IRQs (XEN) ..TIMER: vector=0x31 pin1=2 pin2=-1 (XEN) checking TSC synchronization across 4 C...