On 21/04/15 11:22, Jan Beulich wrote: >>>> On 21.04.15 at 12:11, <david.vra...@citrix.com> wrote: >> We have analysed the affect of this series on interrupt latency (by >> measuring the duration of irq disable/enable regions) and there is no >> signficant impact. >> >> http://xenbits.xen.org/people/dvrabel/bar2_comp.png > > Thanks for doing this! > >> Interestingly, the biggest offenders for long critical sections are >> bare irq disable/enable regions, and some of these are really bad (10s >> of ms)! >> >> http://xenbits.xen.org/people/dvrabel/bar_normal_busy.png > > Despite both pictures saying micro-seconds at the respective > axis (and hence the problem not being _as bad_)
This particular graph doesn't show it very well but there are small blips around 4, 10, and 31 ms. David _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
