On 12/04/16 14:59, Peter Maydell wrote: > On 12 April 2016 at 12:48, Alex Bennée <alex.ben...@linaro.org> wrote: >> Sergey Fedorov <serge.f...@gmail.com> writes: >>> Maybe we'd better use existing qemu accelerator framework and introduce >>> "-machine accel=mttcg" option? >> My worry would be breaking existing code which assumes kvm | tcg. We >> will want to enable mttcg by default for combos that work without having >> to tweak tooling that already uses the -machine options. > Comments from the peanut gallery: > * We definitely want to just default to MTTCG where it works: > users shouldn't have to add new command line switches to get the > better performance etc, because in practice that won't happen > * Anything that adds a new command line option at all has to > be supported practically forever, so options that are only > useful for a transitional period are worth thinking twice about
Yes, but users may like to have an option to disable MTTCG for some reason. I'm also concerned about icount mode: not sure how to account virtual time when all vCPUs run in parallel. Kind regards, Sergey
