looking for info on TSC virtualization with kvm

I'm trying to find out some hard data on TSC virtualization when using qemu-kvm to run linux guests on Intel-based linux 3.4 hosts. I've read "https://www.kernel.org/doc/Documentation/virtual/kvm/timekeeping.txt"; and looked at the code somewhat, but it's a bit tricky to figure out exactly wh

Re: dirty page tracking in kvm/qemu -- page faults inevitable?

On 07/30/2014 09:42 AM, Paolo Bonzini wrote: Il 30/07/2014 09:41, Chris Friesen ha scritto: I found a document at "http://ftp.software-sources.co.il/Processor_Architecture_Update-Bob_Valentine.pdf"; which talks about the benefits of Haswell. One of the items reads: "New Acc

Re: dirty page tracking in kvm/qemu -- page faults inevitable?

On 07/30/2014 12:09 AM, Xiao Guangrong wrote: On 07/30/2014 06:12 AM, Chris Friesen wrote: Hi, I've got an issue where we're hitting major performance penalties while doing live migration, and it seems like it might be due to page faults triggering hypervisor exits, and then we

dirty page tracking in kvm/qemu -- page faults inevitable?

Hi, I've got an issue where we're hitting major performance penalties while doing live migration, and it seems like it might be due to page faults triggering hypervisor exits, and then we get stuck waiting for the iothread lock which is held by the qemu dirty page scanning code. Accordingly,

Re: problems starting kvm-qemu with 5+ virtual functions

On 07/11/2012 02:06 PM, Alex Williamson wrote: On Wed, 2012-07-11 at 13:56 -0600, Chris Friesen wrote: On 07/11/2012 01:34 PM, Alex Williamson wrote: The limiting factor to increasing memory slots was searching the array. That's since been fixed by caching mmio page table entries. Thank

Re: problems starting kvm-qemu with 5+ virtual functions

On 07/11/2012 01:34 PM, Alex Williamson wrote: The limiting factor to increasing memory slots was searching the array. That's since been fixed by caching mmio page table entries. Thanks for the confirmation of my suspicions. Do you know roughly when this went in? A commit ID would be great.

problems starting kvm-qemu with 5+ virtual functions

Hi, We're running into a problem where we can't start up a single instance of kvm-qemu with 5 or more virtual functions (for the ethernet card) being passed to the guest. It's an Intel I350 NIC if it matters. I noticed a discussion in a thread titled "[RFC PATCH 0/2] Expose available KVM fr

Re: [Qemu-devel] [BUG] need to export variables in config.mak

On 09/30/2011 11:52 AM, Richard Henderson wrote: On 09/30/2011 10:07 AM, Chris Friesen wrote: We've been playing a bit with kvm-kmod-3.0b. We use a cross compile environment, and one of my coworkers noticed that the variables in config.mak weren't actually exported and so didn'

[PATCH] need to export variables in config.mak

The variables being written to config.mak by configure need to be exported in order to take effect when building the package. The following patch fixes this in our environment. Signed-off-by: Chris Friesen Index: kvm-kmod-3.0b/configure

[BUG] need to export variables in config.mak

We've been playing a bit with kvm-kmod-3.0b. We use a cross compile environment, and one of my coworkers noticed that the variables in config.mak weren't actually exported and so didn't actually have any effect. I think something like the following patch is required. Thanks

2.6.27, kvm-kmod, and PCI device assignment

ly added to mainline for 2.6.29-rc1, so it seems like extra work will be needed for 2.6.28 and earlier. Thanks, Chris -- Chris Friesen Software Developer GENBAND chris.frie...@genband.com www.genband.com -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body o

[BUG] error compiling qemu-kvm-0.15.0 without vnc

auth) +{ +} static inline int vnc_display_password(DisplayState *ds, const char *password) { qerror_report(QERR_FEATURE_DISABLED, "vnc"); -- Chris Friesen Software Developer GENBAND chris.frie...@genband.com www.genband.com -- To unsubscribe from this list: send the line "

Re: help? need to enable VT-d for 2.6.27

On 08/30/2011 01:59 PM, Jan Kiszka wrote: On 2011-08-30 21:39, Chris Friesen wrote: 2) If I create such a link, it builds a few files, and then gives the following: /home/cfriesen/Download/kvm-kmod-3.0b/x86/x86.c: In function ‘vcpu_enter_guest’: /home/cfriesen/Download/kvm-kmod-3.0b/x86/x86

Re: help? need to enable VT-d for 2.6.27

Thanks for the pointer. Chris -- Chris Friesen Software Developer GENBAND chris.frie...@genband.com www.genband.com -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Re: help? need to enable VT-d for 2.6.27

On 08/30/2011 11:55 AM, David Ahern wrote: On 08/30/2011 10:29 AM, Chris Friesen wrote: I'm in a bit of an odd situation. We run an embedded version of linux on many different boards with different vendor agreements so it's painful to upgrade kernel versions. I've been asked

help? need to enable VT-d for 2.6.27

e any better options? Any advice you could provide would be appreciated. Thanks, Chris -- Chris Friesen Software Developer GENBAND chris.frie...@genband.com www.genband.com -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.ker

Re: SR-IOV and KVM?

On 06/24/2011 07:13 PM, Sasha Levin wrote: On Fri, 2011-06-24 at 15:10 -0600, Chris Friesen wrote: Is anyone working on SR-IOV for KVM, specifically for networking? Or is virtio good enough that it's not a pressing concern? What exactly are you missing now? Maybe it's just a doc

SR-IOV and KVM?

Is anyone working on SR-IOV for KVM, specifically for networking? Or is virtio good enough that it's not a pressing concern? Thanks, Chris -- Chris Friesen Software Developer GENBAND chris.frie...@genband.com www.genband.com -- To unsubscribe from this list: send the line "unsub

Re: [RFC] CPU hard limits

Avi Kivity wrote: > I am selling virtual private servers. A 10% cpu share costs $x/month, > and I guarantee you'll get that 10%, or your money back. On the other > hand, I want to limit cpu usage to that 10% (maybe a little more) so > people don't buy 10% shares and use 100% on my underutiliz

Re: [RFC] CPU hard limits

Dhaval Giani wrote: > Shares cannot be used to provide guarantees. All they decide is what > propotion groups can get CPU time. (yes, shares is a bad name, weight > shows the intent better). If I (as the administrator of the system) arbitrarily decide that all the shares/weights must add up to 10

Re: [RFC] CPU hard limits

Srivatsa Vaddagiri wrote: > On Fri, Jun 05, 2009 at 01:53:15AM -0700, Paul Menage wrote: >> This claim (and the subsequent long thread it generated on how limits >> can provide guarantees) confused me a bit. >> >> Why do we need limits to provide guarantees when we can already >> provide guarantees

Re: [RFC] CPU hard limits

Balbir Singh wrote: > But then there is no other way to make a *guarantee*, guarantees come > at a cost of idling resources, no? Can you show me any other > combination that will provide the guarantee and without idling the > system for the specified guarantees? The example given was two 10% guar