similar to: Credit scheduler documentation

Hi, I''m trying to create a new gallery layout. I did the following: o create plugin/foobar.rb in my base directory. o copy plugins/gallerylayouters/default.rb in foobar.rb and make appropriate modifications. For simplicity, lets say my class looks thus: require ''webgen/plugins/gallerylayouters/default'' module GalleryLayouters class Foobar <

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, the current BVT scheduler (CS 10647:8e55c5c11475) does not do it

Cycling around many CPUs in XenMon''s curses mode can get cumbersome. This trivial patch adds bindings to move to the previous CPU. The next/previous binding seems more natural to me than the earlier cycle binding, but we can keep them all for now. # HG changeset patch # Node ID 146b5c76086c07fad61bea7ccf60f2f4fd66abbd # Parent 7dd31dbf16e75f0f70e0f9c44b2bb2b5fc6eecf1 Add next/previous

Hi all, The xen documentation at http://wiki.xensource.com/xenwiki/CreditSchedulerstates that the max weight you can set for a domU is 65535. To verify this I decided to try setting 65535 to my dom0 which had no domUs running at the time. I was unable to set a weight of 65535. The server is a duel quad core (8 cores) with 32GB RAM running Centos 5.4/xen-3.0.3-94.el5_4.3 . The maximum weight I was

Hi, I did accidentally discover a quite useful feature in the Xen HVM configuration file. I here by suggest it to be added in the example file located at </usr/share/doc/xen-utils-common/examples/xmexample.hvm.gz>. It seems that you can configure Xen 3.1's Credit-Based CPU Scheduler by adding settings cpu_weight=128 and cpu_cap=20 in the configuration file itself. Though I

Hi folks, I''m trying to use the atropos scheduler with Xen. Couple of questions: - the scheduling param *has* to be specified at boot time right, or does Xen allow changing the scheduling scheme at run time?? - xm help atropos gives a very vague message at best, perhaps we could make it more elaborate: xm atropos DOM SLICE PERIOD LATENCY XTRATIME o is DOM the vm ID or the vm NAME (as

I''m trying to understand interrupt handling in Xen (as described in the "Restructuring I/O" techreport). But I''m having a hard time finding all the bits and pieces in the code. For instance, the text says "a device''s interrupt line triggers execution of a stub routing within Xen rather than causing immediate entry into the domain that is managing that

Hi everyone, I''m trying to convert some Xen HVM images to run on VMware ESX, unsuccessfully thus far. I believe the problem is that ESX by default wants the VMs to use SCSI virtual disks, but my HVM VMs are configured to use IDE virtual disks. If you have any experience with this sort of thing, please get in touch. Thanks! Diwaker -- http://floatingsun.net/

Hi list, I''m using xen 3.0.0 and wonder how to obtain the 6 DOMU scheduling parameters from my DOM0 domain. Sort opposite of the sched-sedf xm sub-command Can someone help me ? Pierre _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

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://lists.xensource.com/xen-users

Hi! I`m using xen 3.0.2 on a Debian Sarge 3,1 (XEON machine)! By default my scheduler is "sedf", ok?! I would like to change it to the "credit"! I tried to set the parameter "sched=credit" in my grub config, but when I try to use the command "xm sched-credit -d <domain>" and others, it doesn`t work! But if I try "xm sched-sedf -l" it

Hi, I''m a PhD student trying to add some load balancing code to the credit scheduler in order to fit some specific necessities. I''m trying to understand the credit scheduler code and I don''t quite get in which part of it a pcpu starts running a vcpu. I need to keep track of when a vpcu starts running in a cpu and when it stops. Any hint on that? I think that it would

Modified function runq_candidate in the credit 2 scheduler to have it consider hard and soft affinity when choosing the next vCPU from the run queue to run on the given pCPU. Function now chooses the vCPU with the most credit that has hard affinity and maybe soft affinity for the given pCPU. If it does not have soft affinity and there is another vCPU that prefers to run on the given pCPU, then as

Attached is the second release of XenMon, which is a unique performance monitoring tool for Xen. Instead of using hypervisor calls to get domain information, we use the xentrace facility to provide fine-grained monitoring of various metrics (see README below). We have written up a small case study that demonstrates the usefulness of the tool and the metrics that it reports. This will be

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, I read about RPC interface for xenmon in this presentation: www.xensource.com/files/xs0106_xenmon_brief.pdf Has such interface been implemented yet by anyone? Thanks, -- Jayesh ------------------------------------------------------------------------ Everything you can imagine is real _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi all, Since Xen 4.2.0, users can change time slice of the scheduler at runtime via xl command line, a very nice feature. However, it is not *correctly* implemented. Problem description -------------------- say you set the ''cap'' of one VM to 50 (a half core), -when setting the time slice to be *greater* than 30ms, the VM gets much *less* CPU cycles than its allocation -when

Hi Keir, csched_load_balance is used to see if there are higher privileged vcpu in other physical processors'' runnable queue, if there is, then migrate this vcpu to this physical processor. But at following scenario, this vcpu migration is unnecessary. 1. idle_vcpu0 is running on lp0, hvm_vcpu is in lp0''s runnable queue, this happens when hvm_vcpu is just being woken up, 2.

Hi everyone, I''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

>From tools/libxc/xc_atropos.c: int xc_atropos_domain_set(int xc_handle, u32 domid, u64 period, u64 slice, u64 latency, int xtratime) which takes 6 arguments >From tools/python/xen/xm/main.py: class ProgAtropos(Prog): <snip> def main(self, args): if len(args) != 5: self.err("%s: Invalid argument(s)" % args[0])