Matthew Kent wrote:
If DYNAMIC_TICKS is defined qemu does not attepmt to generate SIGALRM at a
constant rate. Rather, the system timer is set to generate SIGALRM only
when it is needed. DYNAMIC_TICKS reduces the number of SIGALRMs sent to
idle dynamic-ticked guests.
Original patch from Dan Kenigsberg <[EMAIL PROTECTED]>
Signed-off-by: Luca Tettamanti <[EMAIL PROTECTED]>
Wow, this patch sure made a difference for some timings I've been doing
with kvm-35 and hackbench. All tests using 2.6.23-rc3+hrtimers patch for
x86_64/i386 tickless and a quad core intel:
[EMAIL PROTECTED] ~]$ time ./hackbench 50
x86_64 host : real 0m10.845s
x86_64 host, bound to 1 cpu : real 0m21.884s
i386 guest+unix clock : real 0m49.206s
i386 guest+hpet clock : real 0m48.292s
i386 guest+dynticks clock : real 0m28.835s
Results are repeatable and verfied with a stopwatch because I didn't
believe them at first :)
Great stuff.
I'm not sure what these results mean...
--
error compiling committee.c: too many arguments to function
