[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] [PATCH] replace rdtsc emulation-vs-native xen boot option with per-domain (hypervisor part)
> On 09/28/09 15:43, Dan Magenheimer wrote: > > PV ones too. An app doesn't have any idea (and doesn't > > and shouldn't care) if it is running on a PV or HVM domain. > > Well, it shouldn't be enabled by default. That slows down all rdtsc > operations for the benefit of very niche applications. The Xen > clocksource assumes that rdtsc is fast, unemulated and in need of > correction. > > If someone really needs an artificial tsc, then they can enable the > option for themselves. While I understand and sympathize (and the idealistic side of me even agrees with) your position, let me argue your point "they can enable the option for themselves" by mangling a famous movie quote: "In a cloud, no-one can hear rdtsc scream" _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |