> 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. -- Matthew Kent <[EMAIL PROTECTED]> http://magoazul.com ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
