On Wed, 14 Mar 2007 12:07:14 -0700 Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote: > Subject: Add a sched_clock paravirt_op > > The tsc-based get_scheduled_cycles interface is not a good match for > Xen's runstate accounting, which reports everything in nanoseconds. > > This patch replaces this interface with a sched_clock interface, which > matches both Xen and VMI's requirements. > > In order to do this, we: > 1. replace get_scheduled_cycles with sched_clock > 2. hoist cycles_2_ns into a common header > 3. update vmi accordingly > > One thing to note: because sched_clock is implemented as a weak function in > kernel/sched.c, we must define a real function in order to override this weak > binding. This means the usual paravirt_ops technique of using an inline > function won't work in this case. include/asm/paravirt.h: In function 'paravirt_sched_clock': include/asm/paravirt.h:281: warning: implicit declaration of function 'PVOP_CALL0' include/asm/paravirt.h:281: error: expected expression before 'unsigned' _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
