On Mon, Oct 06, 2014 at 01:45:24PM +0900, Oscar Garcia wrote: > Hello, > > I have a question about parallel vmexit calls, I would appreciate > any answer or suggestion. > > I have a host with debian 7 (intel i7 - RAM 8GB), the guest OS is > also debian. I am running a program with some threads, every thread > makes a vmexit call.
How is that vmexit call made? > Also every thread runs in a isolated vcpu. The > problem is that the program does not run fluently, it looks like > that every thread interfere with each other. Can you be more precise about this? Did you perform a measurement? > This situation does not happen when separately processes call vmexit > simultaneously. The question is: there is any restriction (any lock) > that block the threads. I am not sure maybe libc, RCU, on even Qemu > and KVM? In QEMU there is a mutex which is shared by all vcpus, and is acquired right after entry in QEMU, named qemu_mutex. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
