search for: next_slice

I''m working on a new hypercall, do_confer, which allows the directed yielding of a vcpu to another vcpu. It is mainly used when a vcpu fails to acquire a spinlock, yielding to the lock holder instead of spinning. I ported the ppc64 spinlock implementation for the i386 linux portion. In implementing the hypercall, I''ve been trying to figure out how to get the scheduler

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:

...include <xen/mm.h> #include <xen/errno.h> #include <xen/guest_access.h> +#include <xen/rcupdate.h> #include <xen/multicall.h> #include <public/sched.h> @@ -552,9 +553,15 @@ static void schedule(void) struct schedule_data *sd; struct task_slice next_slice; s32 r_time; /* time for new dom to run */ + int cpu = smp_processor_id(); ASSERT(!in_irq()); ASSERT(this_cpu(mc_state).flags == 0); + + if (rcu_pending(cpu)) + /* since __enter_scheduler is called from softirq context +...

...include <xen/mm.h> #include <xen/errno.h> #include <xen/guest_access.h> +#include <xen/rcupdate.h> #include <xen/multicall.h> #include <public/sched.h> @@ -552,9 +553,15 @@ static void schedule(void) struct schedule_data *sd; struct task_slice next_slice; s32 r_time; /* time for new dom to run */ + int cpu = smp_processor_id(); ASSERT(!in_irq()); ASSERT(this_cpu(mc_state).flags == 0); + + if (rcu_pending(cpu)) + /* since __enter_scheduler is called from softirq context +...