similar to: scheduler independent forced vcpu selection

Address some credit2 issues. This patch series, along with the recent changes to the cpupools interface, should address some of the strange credit2 instability. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi all, With the new vm-tools we are trying to get top like capabilities going correctly. Currently we have a program vm-list that has some of this capability but is dependent on the cpu time given by libxc calls (xc_get_dom_info & xc_domain_get_cpu_usage). These two functions give you how much time (in nanoseconds, why is this not documented) the domain has been actively used. Approaches:

This patch implements cpu offline feature. Best Regards Haitao Shan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

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 require the CPU time) If yes, how should I build the "xm bvt"

As discussed in a previous e-mail, this patch series implements yield for the credit scheduler. This allows a VM to actually yield (give up the cpu to another VM) when it wants to. This has been shown to be effective when used in the spinlock code to avoid wasting time spinning when another vcpu is not currently scheduled. _______________________________________________ Xen-devel mailing list

Hi, This patch intends to accurate vcpu weighting for CPU intensive job. The reason of this problem is that vcpu round-robin queue blocks large weight vcpus by small weight vcpus. For example, we assume following case on 2pcpu environment. (with 4domains (each domain has 2vcpus)) dom1 vcpu0,1 w128 credit 4 dom2 vcpu0,1 w128 credit 4 dom3 vcpu0,1 w256 credit 8 dom4 vcpu0,1 w512 credit 15

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 _______________________________________________ Xen-tools mailing list

Hi, I'm trying to compile UML with LLVM. However, LLVM-LD hangs whiile linking modules. It's consuming 99% of the CPU llvm-ld -v -r -o kernel/built-in.o kernel/sched.o kernel/fork.o kernel/exec_domain.o kernel/panic.o kernel/printk.o kernel/profile.o kernel/exit.o kernel/itimer.o kernel/time.o kernel/softirq.o kernel/resource.o kernel/sysctl.o kernel/capability.o kernel/ptrace.o

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 try (5 is the id of the concerned

This patch -Displays[1] current parameters for running domains ala xm list -Allow users to set[2] one or more parameters[3] without having to provide values for parameters they do not wish to change -Adds additional testing of sched-sedf via new xm-test testcases. With this patch applied, test 02_sedf_period_lower_neg.py exposes a bug[4]. I''ll follow up this email with a patch for

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? ~$ubh _______________________________________________

Hi gang! At work I have a DL320 G2 machine I use as my desktop (I know, weird!...). Back when I ran RHEL WS 2.1 on it, it always ran a SMP kernel because it has a HypterThread capable processor. When I installed (fresh from scratch) Centos 4.4 on it a while back, though, Centos installed only the UP kernel. I've looked in the BIOS for settings to enable/disable HT support and I don't

Currently with the credit scheduler, cpu_weight cannot be assigned to guest domains at boot time.(it can be set with xm sched-weight after booting) This patch allows CPU weight, and CAP to be set by the Xen configuration files. 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

>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,

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

While investigating erratic performance on one our our servers, I'm getting some very odd performance stats coming from vmstat. What initially appeared to be happening is the machine goes into a hard loop in some mod_perl webserver code. Now there still may be an issue with the code, but my code examinations show no possible way this could be happening, but what I'm writing to you

Existing credit scheduler is not power aware. To achieve better power saving ability with negligible performance impact, following areas may be tweaked and listed here for comments first. Goal is not to silly save power with sacrifice of performance, e.g. we don''t want to prevent migration when there''re free cpus with some pending runqueues. But when free computing power is

I am seeing a problem with Dom0 crashing on x86_64 whenever I create a DomU. I''ve done some more testing, and it appears that this problem is somehow related to networking. Dom0 crashes as soon as the networking services are started when DomU is coming up. As an experiment, I brought up DomU without networking, and it stayed up. As soon as I started DomU with networking enabled, however,

Hi, I am trying to understand Hypervisor_sched_op function and I have few question regarding this - 1. I understand that a guest VM can use the above function with "yield", in order to relinquish CPU time to other guests with running tasks. a) So when the guest VM makes this call does it save/persist any scheduling information about its current processes like runqueue, process state -

Hi, I am trying to understand Hypervisor_sched_op function and I have few question regarding this - 1. I understand that a guest VM can use the above function with "yield", in order to relinquish CPU time to other guests with running tasks. a) So when the guest VM makes this call does it save/persist any scheduling information about its current processes like runqueue, process state -