Luca wrote: > On 8/19/07, Luca Tettamanti <[EMAIL PROTECTED]> wrote: > >> +static uint64_t qemu_next_deadline(void) { >> + uint64_t nearest_delta_us = ULLONG_MAX; >> + uint64_t vmdelta_us; >> > > Hum, I introduced a bug here... those vars should be signed. > > On the overhead introduced: how do you measure it? > >
Run a 100Hz guest, measure cpu usage using something accurate like cyclesoak, with and without dynticks, with and without kvm. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.